IBM Selectric I/O Manual Of Instruction

Customer Engineering

Issued to:

Branch Department:

Address:

If

this

Office:

__________________

manual

__________________

________________

is

mislaid,

please

Manual

return

it

to

of

Instruction

the

above

_

address.

Selectric

I/O

®

Keyboard Printer

PREFACE

This manual has can

be

incorporated

The

particular

scribed.

This manual covers models

1

620

Mod.

been

model you

I\,

written in

to

include

the

"Selectric"

are

concerned

731, 735, 765, 775,

the

I/O

with may not use

maximum hardware or mechanisms

Keyboard

1415,

1014,

Printer

all

of

Sabre,

thru

October

the

mechanisms

Stretch,

7040/44,

that

1964.

de-

All rights Address comments

IBM

Office

to

reproduce

Products Divi"sion,

this

regarding

material

the

comments

Lexington,

are

reserved

of

this publi

Kentucky

by

IBM.

cation

40507

to:

CONTENTS

Motor Typehead Tilt Rotate Keyboard Print Selection Keyboard Shift Cycle Clutch Alignment Print Print Print Mainspring Operational Operational Operational Spacebar. Spacebar

Carrier Carrier

Tabulator Margin

and

Drive

.............................

Mechanism

Section

Selection

Contact

Lock

.........................

.................................

Operation

...........................

Mechanism Mechanism Escapement

.....................................•.............................

Cams Selection Contact

.. . ........................

Mechanism

Backspace

Indexing Platen

Paper Fabric Ribbon Red Ribbon Fabric Ribbon

...........................

Return Return

.......................................•............................

Variabl.e

.............................

Control

Feed

and

(Early

Shift

(Late

...............................................................

"

.......................................

................................................................

..............................................................

and

Character

Unit

.....................

Assembly

.........................................................

(Early

Style)

(Late

Style)

......................•.....................................

and

Control

Unit

Assembly

(Print

(Early

Style)

(Late

Style)

...............................................................

................................................................

Release ME:tchanism

Style)

...............................................................

Style). " .........................................

Selection

.....................................................

........

....................................................

Mechanism

..............

(Late

Escapement)

.....................................................

...............•.....................................

.......................................................

.........................................

"

......................................

"

......................................

"

......................................

','

......................................

:

...........................................

.........................................

','

......................................

Style)

...............•.......................

,

.......................................

..........................................

'

.•.....................................

','

......................................

..............................................

,

...........

1 3 5 8

12 16 18 20 22 28

29 39 41

41.5 44 45 49

50.1

51 54

54.1

55

58.1

59 62 63 69

73 75 79

80

(2) INDEX SELECTION

LEVER

(I) COpy CONTROL

LEVER

(3)

PAPER RELEASE LEVER

(4)

PAPER

BAIL LEVER

TAB

(7)

ON/OFF

SWITCH

(8)

SET/CLEAR

SELECTRIC

1/0

KEYBOARD

PRINTER

1.

2.

3.

4.

5.

Copy

Control

copy

control

the

platen

Index

Selection

of

the

back

for

Paper move

paper.

Paper

Bai I

Should

Margin

settings.

platen

double

Re

lease

be

Set

Lever - To

lever

is

wi

II

move

Lever -You

b)/

setting

space.

Lever -Move

Lever

- Holds

moved

forward

Leve~

-

provided. farther

the

when

Provides

Operating

compensate

As

the

away

from

may

index

selection

the

paper

the

paper inserting

the

operator

Controls

for

copy

the

control

release

against

paper.

the

thickness

control

lever

typehead.

the

indexing

lever

forward

lever

forward

the

platen

with a means

of

multiple

is

(line

for

to

of

changing

moved

space

single

to

position

prevent

forms,

to

the

rear,

movement)

space

and

or

buckl

ing.

the

margin

the

re-

6. I ndex tion

7.

On-Off

8.

Tab

9.

Margin margin

Key -

of

the

Set/C

Release

settings

Provides

carrier

Switch

lear

assembly.

- Turns

-,

Used

Key -

without

vertical

to

the

set

indexing

pri

nter

or c I

ear

on

Provides a means

changing

the

of

the

and

tab

stops.

of

settings.

paper

off.

operating

without

the

changing

printer

the

beyond

posi-

the

The motor used in shaded 60 is pulley bracket

eirc

pole,

induction

cycles

A.

C.

mounted

at

toward

at

each

Ie

the

rubber motor mounts.

3"

Shaded Pole Motor

the

(Fig.

left

right.

end

MOTOR

Selectric

type: motor

1).

I~

rear

corner

It

by

ring

AND

I/O

is

rated

is

attached

shaped

DRIVE

Printer

that

of

the

spring

at

is a three-inch

requires 115

1/35 h .p. machine

to

an retainers

volts,

The motor

with

the

ad~ustable

that

en-

It should seldom be necessary care

should be vertedwhen notch

in

The

starting

pole

principle.

The motor has the

field

chine

stalled.

to

remain dangerof will stall breakage gained the

circuit.

as long as

the

coil in

stalled

an

only

causes

normal

the

taken

in

replacing

installed.

bearing

torque

an

The

open

temperature,

The

The oil hole in

would

for

the

No

capacitor

internal

the

in rare cases where a maladjustment

the

circuit

motor

circuit

event

circuit

for a period

circuit

machine

breaker

is

stalled

to

disassemble

either

then

be on

motor

is

provided by

is

required.

breaker

the

switch

will

open

only

of

time;

during normal

to

lock.

the

circuit

will

continue

and

the

end

bell

the

left

the

bottom.

to

prevent

is

left

if

the

therefore

operation.

After

breaker

switch

end

ON

motor

the

wi

to

motor;

open

however,

that

is

not

bell

and

the

shaded

damage

with

the

is

allowed

there

The motor

or

motor has

II

again

and

is

left

in-

the

to

ma-

is no

parts

reclose close

ON.

Motor Clutch

Pulley

and

Mechanism

Because higher

should be

In rated

end

the the grill in charged air

room

The attached

jumper wire

(Fig.

of

temperature

taken

order

to

in

the

of

the field coi Is. The right

the

pulls cool

that

ultimately

temperature

three

2).

its

design,

in handling

prevent

design

rotor pulls

rear

corner

rear

of

wire grounded system has

to

the

is

connected

the

than

other

over-heating,

of

the

air

through

air

is

of

the

machine

air

with it

emerges

so

that

powerframe

between

shaded pole motor tends

IBM

the

motor

motor. A fan

then

discharged through a

motor. The

cover.

from

no

objectionable

at

the

White

typewriter

to

prevent

a cool ing system is

the

left

The hot

within

the

machine

the

third line cord cord c the

motor

Green

attached

end

bell

air

escapes

the

machine.

is

heat

Ii p screw.

and

motors.

air

cooled

Black

to

run

Core

being

burned.

incorpo-

to

the

and

across

duct

through a

being

to

results.

lead

A short

powerframe

Plug

at

right

at

dis-

The

near

a

FIGURE

The motor may be removed easi off

the

brackets. motor may be moved toward motor in

retaining

The motor bearings motor saturated top

of

end

each

the

right.

operation

cl ips.

bells.

oil

wick.

bearing

1.

Shaded Pole Motor

With

the

to

the

rear,

With

this

is

against

Each

the

are

babbit

bearing Asmall square to

supply oil

belt

bracket

Iy

after

snapping

removed

and

bracket

inserts pressed

is

completedy surrounded by a

directly

the

motor may be removed

design,

rather

wick

fits

the

right

the

force

than

against

solidly

into a notch

11'0

the

rotor

retainers

end

of

into

shaft.

the

inthe

1

Solderless

FIGURE

In

some

Selectric

type

motor is used winding controls mains in tor rear

circuit,

the

is

mounted in a vel:tical position by a

corner

2.

Shaded Pole Motor Diagram

I/O

Printers, a

(Fig.

3). A capacitor,

provides a starting torque for

direction

circuit

of

the

of

rotation.

whi

Ie

machine.

the

Connector

capacitor-start

The

motor

is

in

the

capacitor

running.

bracket

Switch

induction

starting

the

motor

also

The

at

re-

capaci-

the

right

and

Motor

Contactor

(835 Printer)

FIGURE

The

capacitor

tion

to capacitor mounting screws

the

three

mounting

start

three

wire

bracket.

(Fig.

3.

Capacitor-Start

wire

line

cord

4).

grounded

and

jumper

This

is

done

Motor

system has in

wire a grounded

by

using

addi-

metal

Mounted tact

bracket

tactor

is sociated ON

position nicate, motor

contactor

Motor

Contactor

Terminal

underneath

is

the motor

a 48V

relay

electronics.

and

the

printer

(Fig.

-lI....,r; •

the

printer

contactor

that

works in

If

the

printer

the

Communicate-Local

motor

can

be

4.2).

...1~

~

...

E

IIC

..

".J

Z \

~

....

~

z

3

2

i

~

:;

$

~

z

§ ..

<

::i

0

near

the

(Fig.

conjunction

ON/OFF

turned

I

shift

4.1).

switch

OFF

Shield

feedback

The motor

with

switch

is

and

ON

con-

the

as-

is

in

the

in

Commuby

the

Shift

Contact

Actuating

Arm

Green -Run

White

Green

Black

Plug Solderless

FIGURE

The switch the

keyboard. by means by pressing down on ON

and

the

is

labeled position, a contrasting shows just the

left

In also is discussed in

above

machine

running when

addition

controls

4.

and

switch

The switch

of

a short I ink

front

ON

and

the

is

ON

to

operating

the

keyboard

the

Capacitor-Start

lever

extending

the

rear

to

turn

the

OFF.

When

color

case.

This

to

minimize

not

in

use.

the

typewriter

lockout

keyboard

are

mounted

operates

of

the

machine

the

at

the

calls

chances

section.

mechanism.

Connector

Motor Diagram

on

the

electrical

to

the

rear.

lever

to

turn

OFF.

The switch

switch

lever

front

of

the

attention

of

the

switch,

Motor

the

right side

switch

It

is

operated

the

machine

lever

is in

the

switch

lever

to

the

fact

that

machine

the

This mechanism

switch

being

lever

ON

of

•

White

Green

Plug

Black

FIGURE

To

Grn

FIGURE

4.1

Power Supply

Wht

Blk

4.2

Motor Diagram

Motor

Contactor

Motor

(835

Printer)

2

Drive

An

eight-toothed

operation

rotation

of

the

speed reduction

motor

pulley

provides positive drive for

machine. A positive-drive

motor

pulley

to

the

cycle

of

3-5/8

to

1 .

belt

clutch

transfers

pulley

the

with a

The shaded pole motor has less starting torque

ci

tor-start

start under a heavi

has been is

allowed

clutch oped by several motors do not

The motor and extend clutch to

the clutch are the Centrifugal of

the a tooth to

rotate

motor •

incorporated

to

engages

the

To

insure

Iy

loaded conditi

in

approach

to

drive

rotor causes

that

the

motor

normal operating

the

machine.

the

machine

mechanisms may have been tripped.

require a centrifugal

pulley

is

held in

place

radially

plate

hub assembly

left

of

the

pawls

(Fig.

spring loaded

motor

is

turned

force causes

cI

utch

plate

of

the

motor

and

drive

operates

by a grip ring

from

motor

5).

against

ON,

so

pulley

freely on

the

left

end

is

set-screwed

pulley.

When

the

stop lugs on

the

clutch

the

clutch

that

the

ti p

(Fig.

5).

the

machine by means

the

motor

on, a centrifuga I clutch

pulley

design.

speed,

The momentum

to

start

clutch.

the

end

retainer.

of

the

Three

to

pulley the

Pivoted on

motor is

the

clutch

plate

turns with

pawls

tC)

of

one

of

The

pulley

pulley.

Motor Pulley

than

the

wi

II

be a 1I0wed

The motor

then

even

though

Capacitor

of

the

rotor shaft

ratchet

(Fig.

rotor shaft just

the

plate

OFF,

the

plate.

the

pivot on

the pawls

is

then

of

the

cycle

cape-

the,

devel-

start

teeth

5).

are

two

pawls

When

rotor.

the

studs

engages

caused

clutch

to

A

Clutch

FIGURE

The

cycle

clutch

the

powerframe. The hub ing and motor

On ing into

left

is

in continuous rotation with

is

runn i

eitherside

and

of

the

hub is

driven by means

engage cle

character. acter gaged

whenever a character

shaft powers the positioning

Its rotation

prints. After

allowing

Plate

5.

pulley

ng

.

of

the

cycle

supported by

called

of

a spring

180

the

shaft to remain

is discussed fully in a

Hub Assembly

Motor Pulley

is

mounted to a hub in

is

supported by a porous bronze

clutch

the

hub

the

cycle

clutch.

keylever

is

re$tricted

0

rotation

later

section.

Clutch

the

pulley

hub

(Fig.

shaft.

The

is

of

the

typehead

to

180

the

spring

stationary.

pulley

is

6).

The

clutch

depressed.

0

each

clutch The

the

center

whenever

a shaft

extend-

The shaft to

cycle

shaft

is

allowed

The

to the desired

time a

is

disen-

cycle

clutch

of

bear-

the

is

to

cy-

char-

2.1

Print Shaft

lFi I ter

Shaft

vent

any

noise due

tween

the

cycle

made by two extensions

left

side

of

held

in position

screws. Two nylon inserts fit into

limiter hub). tween

Just clutches of their

hub (around

The inserts provide a noiseless driving

the

two hubs.

to

the

and

the

carrier

particular

to

vibration.

clutch

pulley

of

the

torque limiter

at

the

extreme

the

extensions

right

of

the

torque limiter hub

two small pinion

return

and

tab

sections.

TYPEHEAD

The driving hub hub

hub.

left

gears.

mechanisms

connection

and

the

operational

that

fit into

The torque limiter hub is

end

of

the

of

the

These components

cut-outs

the

shaft by two set

cut-outs

cycle

connection

are

and

are

shsft is

of

the

clutch

three

are

di~ussed

be-

in

the

torque

pulley

be-

spring

part

in

FIGURE

Through a series driven by are ates the shaft and

The shaft operational ations spacebar, shift. tab its own

The hub and The right end bronze pulley The

the

cycle

the

filter

shaft

the

characterselectior.l mechanisms,

shift

interlock,

operates

ribbon feed and lift mechanisms.

are

The shaft also controls

operation.

operational

sleeve

the print mechanism, type

to

the

cam shaft

driven by its

backspace,

Each

section.

cam shaft is driven by

isin

continuous rotation

of bearing. hub where

provides a snug fit for

of

right

the

The

idler

and

and a

it

6.

gears

shaft

~ach

the

spacebar

of

(Fig.

rotation.

tabulation,

of

the

shaft

left

end

is

supported by a vinyl

Drive Mechanism

at

the

left,

time

it

operates

print

shaft.

the

cycle

6).

All powered functional

the

functions

whenever

operates

extends

The

the

lockout

aligning

clutch

The functions involved

carrier

return,

speed

of

is

discussed in

the

in a

self-aligning

into

the

shaft in

two

other

(Fig.

filter

print

device.

pulley

the

carrier

cycle

motor

the

sleeve

the

shafts

6).

They

shaft

oper-

escapement,

The print

mechanism,

hub is

oper-

indexing,

during a

detail

clutch

pulley

is

running.

porous

cycle

c1utclh

(Fig.

7).

hub

to

pre-

are

the

are

and

in

Carrier

The printing eighty-eight of

is the and the sembly.

bon feed and

left

Assembly

the

paper

the

box-shaped

platen

other

In

and

right margins on

element characters.

by a framework

(Fig.

print mechanism

addition,

lift

is a ball shaped

casting

8).

Its purpose

mechanisms

the

mechanisms,

the

The

type

called

that

moves

along

is

contained

carrier

also supports

and a bracket

paper.

is

to

typehead

head

is supported in front

the

carrier.

laterally

transport

the

writing within

the

that

just in front the

line.

the

containing

The

carrier

type

head

Almost

carrier

ribbon,

controls

of

asribthe

Cycle

Clutch

Torque Limiter

FIGURE

7.

Pulley

Hub

Sleeve

Operational

Cam Shaft Drive

Connection

At

the

front ings in sleeve, right on rier. enclosed the spreads a light film ofthe sorbed by rotation

the must rotate

the

An

oil soaked in a

carrier

print

the

of

3

FIGURE

of

the

carrier

print shaft

retaining

moves,

sleeve.

bearings in

the

print

8.

Front

Carrier

carrier, a sleeve

(Fig.

8).

The

within

the

of Oil

the

to

provide

felt

ring surrounds

cup

felt

ring,

oil

on

from

the

sleeve.

carrier.

the

at

each

called

the

shaft

the

print shaft wipers is also

carrier

Support

fits into two bronze

sleeve,

front support for

It

the

side

of

the

to

lubricate

casting

called

also slides

print shaft

the

carrier.

print shaft

the

to

lubricate

the

bear-

print

left

car-

and

wiper,

sliding

the

to

is As

ab-

Carrier

The front the is square block escapement prevents upward movement forthe

Support - Early

edge

rear

of

located

upper block has

justment for

of

the

escapement

the

carrier

on the powerframe just

attached

rack.

the

A simi

up

to

an

and

rides

the

down

rack

(Fig.

rear

of

lar

block

of

the

eccentric

play

serves as a rail on which

9).

The

escapement

to

the

rear

of

the

carrier.

the

carrier

beneath

carrier.

shoulder

at

the

sl

ides

along

the

escapement

The mounting stud

to

provide

rear

of

the

rack

the rack

an

ad-

carrier.

Rocker

The rocker tion

of

A

head

to

ents

involved

tions

are

the

on pressed bearing surface for the

rocker shaft prevents si de thrust washer surface for

is

a pivoting platform

the

carrier

and

from

the

in

the

also

contained

rocker shaft

into

the

rocker,

at

the

rocker.

(Fig.

11).

platen

for

type

head

within

at

the

rear

pivot on

the

rocker. A C-clip

left

of

the

located

Its

purpose

the

print

positioning

the

rocker.

of

the

carrier.

the

shaft

play

in

the

rocker

acts

within

the

rear

is

to

carry

the

operation.

and

aligning

The rocker pivots

and

on

the

rocker. A stee

as a

Compon-

Two bushings,

act

as

the

right

latera I bearing

por-

type-

opera-

side

I

of

Carrier

The iin stud capement removes the the

~hoe

to per of the

Support - Late

late

that

the

and

the escapement rear of

is

a nylatron

the

rectr of

shoe. A stud,

the

leaf

underside

FIGURE

carrier

upper shoe fits loosely on its

is

spring loaded

rack.

the

spring.

support

This spring

play

rack

carrier

the

of

the

9.

Rear

Carrier

(Fig.

against

load,

between

block

carrier

riveted

the

thereby

The right end of

escapement

eliminating

during a print

mounted

by

the

to

the

10)

the

lower shoe

to a plate

same stud

bracket

Escapement Rack

Support (Early)

differs from

top

provided by a

operation.

plate,

the

eccentric

surface

and

the

any

vertical

that

that anchors spring presses

(Fig.

early

mounting

of

the

leaf

spring,

bottom of

play

The bottom

is

fastened

mounts

the

left

10).

style

es-

of

the

up-

end

against

Attached

(Fig.

a pivot mount for

ri

ng As and

solidly

11).

The yoke has two arms

is

the

upper ba

the

rocker pivots up in

the

typehead

to

the

II

toward

top

ti

It

ring.

socket

front,

the

of

the

to

platen.

rocker

that

Mounted

whi ch

the

yoke moves

platform is

extend

at

the

type

head

Upper Ball

up

to

top

the

Socket

Tilt Ring

the

yoke

provide

of

the

is

attached.

ti

It

ring

ti

It

FIGURE

10.

Rear

Carrier

Support

(late)

Typehead

Before printing

sition

to tains four bands band (Figs. 12 characters eleven from

the

At

rest,

character

This

is

the

4

FIGURE

strike

in

upper

platen.

the

of

home

11.

Rocker Assembly

can

occur,

the

paper.

of

raised

and

13).

the

hemisphere facing toward

case

characters

position

the

upper band position.

the The

characters

Each band has

of

the

typehead

is

If

desired

in

in position

any

(Gear

character

surface

of

the

with

twenty-two

eleven

the

hemisphere facing

is such

to

character

Tilt)

typehead

lower

the

platen

that strike

other

must be in

con-

in

each

case

and

away'

the

middle

the

platen.

than

the

po-

Platen

Lower

Case

Hemisphere

Type Head

Retaining

Clip

Upper

Case

Hemisphere

FIGURE

home position is rotated

the

reached di rest or rest position case clockwise phere

typehead

ing mechanism. easi typehead.

in

printing

recti

on

position.

character

of

relatively

Iy

from

either

position.

by

rotating

and

ti It'ing

an

additional

the

typehead

has

the

This

one

Lower Case Home

12.

Type

Head

desired,

direction

The

after a character

is

desired,

advantage

inexpensive

enables

type

the

unti I

Any lower

the

typehead

the

headi as much as

typehead

the

180

is

toward

and

the

style

to

0

Type Head

and

Platen

head

must

be

ti Ited up

the

desired case up

always

over

rotates

has

head

must be

so

that

the

platen.

conventiona I typebars

easily

operator

another

character

to

five positions in

three

back

been

typed.

rotated

the

upper

detached

to

chcmge

merely

- Top

may be

bands from

to

case

The

single-unit

from

quickly

by

replacing

Spring

View

and/or

is

the

home

If

an

counter-

hemis-

the

Clip

in

either

the

upper

of

be-

print

and

the

The

typehead

spring

clip

together typehead can must be the

place. in er of

Tilt

The purpose of typehead that

The

the

arms assembly mounting

be

installed

rotated

pin.

When

the

home

case

position,

the

machine.

Operation

to

band

upper

ti

It

ring.

that

fit up inside

is

(Fig.

is

keyed

The spring c lip

the

may be brought

ba

fastened

FIGURE

may

be

to

in

as

it

the

mechanism

position.

the

ti

desi red

II

socket

The ti

11).

14.

Type

Head

installed

and

the

one

position

is

insta lied unti I

When

ears

TILT

It

mechanism is

character

is

It

ring pivots on two pins

the

to

the

by

pressing

slipping

upper

is

MECHANISM

to

attached

the

ball

only

then

released

is

at

the

shift mechanism

of

the

head

the

printing

hollow

rocker

rest,

band

to a platform-like

of

to

head

socket

to

the

complete

Mounting

the

ears

into

by a pin so

(Fig.

14). The

it

drops

into

to

lock

the

typehead

clip

are

toward

raise

the

so

that a character

point.

between

typehead.

the

of

place.

position on

the

is

in

rear

part

The yoke

typehead

the

The

that

head

is

the

of

the

yoke

it

in

always

low -

front

in

ca

lied

FIGURE

The

type

head

at

the

top

spring

clip.

and

fits

into a groove

ves

disc,

and

13). The

insta lIing spring c lip a

1I0wi

ng

the

13.

fits a round a post

of

the

rocker

The spring

covers

the

spring c

ears

of

the

head.

is

disengaged

head

to

Platen

Type

assemb I y

clip

in

the

spring

By

pressing

from

be s

lipped

Head

and

ca

lied

and

is

located

top

of

Ii p except

clip

the

groove

up

Platen

- Side

the

upper ba

is

he

Id

on

top

the

post

(Fig.

for

two

are

used in removing

two

ears in

the

and

off.

Type Head

View

II

socket

in p

lace

by

of

the

typehead

14). A

ears

(Fig.

together

mounting post

the

a

con-

12

and

The ti

As

the

ti

It.

print

sition.

Early

Movement of

two

(Fig.

other tor

The

low

tached tube

a

flat

di

recti sma to

it. rotati head.

5

It

ring

is

ti

It

ring pivots on its

Because

position,

Style

beveled

15).

is a part

tube

tilt the

by a

surface

on (looki

II

stee I tape

When

on

the

all

(Gear

the

gear

One

of

causes

sector

tube

rocker. A pulley

to

the

bottom

set

screw

on

the

of

the

ti

When

the

located

typehead

tilt

Ti

It)

ti

It

sectors

sector

the

ti

operates

that

the

tube.

ng

from

enci

rc les

tape

It

tube

pu

lion

at

about

pins,

rests

operations

ring

is

accomplished

located

forms part

ti

It

sector

It

ring

and

through

called

of

the

tube.

presses a sma

The

the

top) by

the

is

pulled,

and

an

the

tape

the

center

it

causes

with

the

are

upward from

directly

of

the

tube.

typehead

the

tilt

The pu Iley

II T -shaped

pulley

an

extensi on spri

pu lIey

and

it

causes

accompanyi

is

re

laxed,

of

the

typehead.

the

typeheadto

upper

band

the

by

the

operation

beneath

tilt

Rotati'on

to

yoke

sector

is

held in a

has

counterclockwise

ng

ring,

be

and

is

one

ti

the

while

of

the

tilted.

extends

pulley

he

Id

block

clockwise

end

It

of

ti

It

in

the

rest

tilt

the

tilt

is

at-

to

the

agai

ng.

A

attached

the

type-

pu

lIey

po-

of

ring

sec-

be-

nst

late

Style

(Gearless

Ti

It)

FIGURE

is restored by its spring causing rest

position.

the

hollow left b lock tends

to round a simi lar the

carrier.

of

the

(Fig.

15.

attached

the

left around a sma

This

carrier

without disturbing

16).

Tilt Mechanism (Early) - Rocker Portion

From

the

pulley,

end

of

the

rocker

to

the

bottom

pulley,

arrangement

and

of

is

Ti

Tilt Sector Tube

the

type

the

ti

It

shaft

the

rocker.

II

pu

"ey,

attached

allows left

the

position of

Tilt Ring

It

Sector

Tilt

head

to

tape

is

by

a rounded

The

back

to

the

right

to

right movement

Spacer

Gears

Pulley

return

guided

tape

ti

It

the

right

side

the

typehead

to

the

through

guide

tape

a-

of

ex-

The "gearless the

previous mechanism. Movement complished pu

II

on mounting stud) transferring motion the

tilt

pulley

by

the

tape

pulley

is

restored

FIGURE 17.

tilt

m~chanism"

the

operation

causes

link.

When

to

the

rest

Gearless

operates

of

ti

It

the

by

the pu

pull on

its

basically

of

the

ti It

pulley

lIey

to

rotate

to

the

ti It ring by means

the

tape

extension

Tilt

(late)

ti

It

ring is

(Fig.

(about its

spring.

the

is

relaxed

same as

ac-

17).

A

of

the

The

pulley

on adjustment on arm

ca

lied

the erts a

pu

II

on

and

a ti

It

to

Tilt-2

latch

the

right is

Iy.

The left pu Iley

ti

It

arm.

the

ti

It

the

typehead.

left

solidly

Movem ent of

tape

to

cause a rotation

Hand Tilt

mounted

is

attached

Pulley

Tilt-1

the

latch

and

arm

is

moved for

to

a pivoting

to

the

left

of

the

ti It

,

.:~:::

ex-

tube

....

The

ti

It

pu shouldered The

other

and

C-clip.

IIey link

rivet

end

of

is

fastened

to

allow

the

link is fastened

the

to

link

the

to

ti

It

pu pivot in to

the

Iley

by

all

directions.

tilt

ring by a pin

a ba

II

FIGURE

16.

Tilt Tape System

6

Latch Sai I

cycle

The (Fig.

18). cams.

pusher

the

motion

paired

to

shaft.

The

later.

shaft

has five

Two

The

to

position the·

operate

5-unit

positive

two

the

latch

and

double

cams,

positive

typehead.

bai I

latch

pusher

lobed cams mounted on

one

5-unit

,:am

and

two

and

one

5-unit

cam provide

The positive cams

located

cams

beneath

wi

1/

be

the

discussed

it

latch

are

cycle

lever

assembly

head

wi concerned deal

with rotating

is

referred

If

the

latches remain

pulled

down when

forward,

pulled

down during

od

of

operating later

secti

II

receive.

with ti Iting

to

later.

it

is

not hooked

ons •

that

determines how much

The first

the

to

the

an

the

various latches forward

and

the

head,

head.

The

the

rear

bail

is

operated.

under

operation

the

tilt

third latches

whi

Ie

the

second

under

of

bai I the

the

If

plate

latch

plate,

any

and

rotate

to

the

three

on

from

they

latch

and

wi

bail.

is

discussed in

left the the

is

II

The

the

right left

wi

held

not

meth-

are

II

be

FIGURE

The

cycle

shaft powers operating shaped Two short arms on a shaft mounted

bai I spective the

rollers

180 and

the

selector

frame

located

of

contains a roller

cyc

Ie

shaft

latch

bai I

applies a constant

0

,

the

is

a 1I0wed

against

bai I

the

is to

t.....::-----

18.

Cycle

the

positioning

latch

just

beneath

the

frame

extend

to

the

powerframe. Each

that

is

cam.

An

cams.

forced down pivoting

return

Each

to

its upward positi

Positive Cams

Shaft

and

bai I. The

the

forward where

constant

Iy

extension

upward pressure

time

the

LCltch

of

the

latch

cyc

in

spring

cye

about

Latch Bail

Bail

typehead

bai I

Ie

shaft

si

de

contact

at

Ie

shaft

the

on.

by

is a box-

(Fig.

18).

they

pivot

of

the

latch

with its

the

rear of

to

hold

the

operates

bai I shaft

re-

Tilt

Differential

The two

by ball shouldered rivets

shoulders allows

isattachedbyadouble bellcrankpivotsonastudat

The

lever;

greater

Tilt

tilt

connection

therefore

than

that

Pulley

latches

the

of

the

of

Tilt-2

are

latches

vertical

the

double

leverage

the

Latch

attached

(Fig. to

pivot in

the

other.

at

each

20). all

link

to

top

of

the

I ink

is

developed

Tilt Tape

Left Side Frame

Tilt Bel/crank

end

of

a short

The ball shape

directions.

the

tilt

bellcrank.

differential

not in

the

middle

by one

tilt

lever

of

the

The

lever

bracket.

of

latch

Latch

The

the

is

The rear of the

recesses

latch

bai I

latch

has a lip formed

(Fig.

19).

Five

of

the

POl

Positive Cam

01

the

latch

contain

is a plate

An

extension

selector

Latch Bail

FIGURE

bai I

is selector attached

to

the

spring holds

latches

~l

;;==-*

19.

Latch Bail

recessed

latches.

rear

are

at

six

Across

by two

screws.

just under

each

components of

points.

the

Each

the

latch

the

~

o @ 0

\ ,

: 0

\ / ;

"--------<-

-SidE~View

Selector

\1

-~--

Latch Bail

All six

rear

of

selector

bai I

plate

to

the

differential

the

rear.

latch

Plate

of

20.

FIGURE

A horizontal I ink tilt

arm.

Operation

left

to

exert

a pull on referred to as ofthehorizontallinkisincreasedatthepulley age

deve

The left hand shouldered pivot

zonta

horizontal

The

tilt

the

left

the

rear,

(Fig.

21).

left

end

the

differential

the'

loped.

regardless

to

prevent

bel/crank

latch

is held

only

the

As

the

of

the

tilt

screw.

of

is

lever

bracket.

Tilt Differential At

connects

pulley

the

rotated

to

right

latch

the

of

the

bel/crank

the

tilt

multiplying

is

mounted

This allows the

position

the

tilt

by a pull on

the

front whi Ie

latch

pulls down on its

pivots

against

The vertiCal I ink

top

tape.

of

tape

is

7

Rest

of

the

tilt

forces

the

The

tilt

arm

arm,

because

due

to

the

ti It arm on a ball

pulley

the

tilt

arm.

from

coming

the

tilt

the

right

forced down by

attached

a stop lug formed

from

bellcrank

tilt

the movement

to

remain

It

off

latches.

one

the

to

arm

to

is

sometimes

to

the

lever-

hori-

must remain

the

pulley.

When

remains

latch

lever,

out

the

lever

the the

to

bail

the

from

is

\

FIGURE

then

pulled to

occurs

if

the

right

pulled is not

is not

connected

When

only

left

end point. the the pulled

cause This places tion.

When

acts,JS a pivot point thirds and sufficient of

The

distance

I ink

by

the

only

ofthe

is moved

characters.

operate

the

left

latch

is

held forward. The

the

to

the

right

of

the

lever vertical from

the

to

be

pulled

the

bail.

typehead

the

second band

the

left

latch

distance

two-thirds

to

cause

The third band is then in

21.

the

tilt

is

pulled

same for both

middle

I ink is

pivot point

down The movement

to

(Fig.

from

the

of

latch

is

is not

pulled

attached

only

ti

It a distance

from

is

operated,

22).

the

pivot point as much as typehead

Tilt - 1

bellcrank. down by

latches,

the

lever.

being

operated

down

to

the

one-third

of

the

The

vertical

the

to

ti

Operation

The same

the

latch

distance

to

right

of one band of top

latch.

It a distance

the

because

by

and

acts

the

lever

latch.

as far as

the

link is sufficient

in

the

printing

right

end

link is

to

the

operating

This movement is

the

printing

action

bail

while

vertical

the

link is

the

bail,

as a pivot

one-third

This causes

the

latch

characters.

posi-

of

the

lever

then

twolatch

of

two bands

position.

link

the

of

to

When

character Because is cause a tilt-three

Rotate

The

is

terclockwise

The upper

shou Ider

24A). the

by tilt The

ball

operated

called

Operation

rotate

The fit

upper

the

tilt

ring

tilt

socket

FIGURE

band;

the

left

the

mechanism rotates

to

ball

at

the

ball

ring

and

fits around a flange

ring

spacer

yet

by

itself,

therefore

latch

tilt-two

bction.

ROTATE

the

desired

socket

bottom

is

very

socket.

spacer.

is shimmed

restrict

23.

Tilt - 3

the

right

it

is referred

causes a

latch.

MECHANISM

character

to

which

fitted

c lose

yet

The upper

The

spacer

up

and

Operation

tilt

l.atch causes a

to

as

the

tilt

of

two

character

Both

latches

the

type

the

typehead

into

a hole in

permits free rotary motion of

ball

attaches

of

the

to

allow

down

play.

operated

head

clockwise or

within a

the

socket

upper

rotation

tilt

tilt-one

tilt

band.

is

attached ti

It

ring

is held in

directly

ball

socket.

of

the

together

to

of

one

latch.

bands, it

coun-

has a

(Fig.

place

the

upper

When both are

operated.

acts

as a pivot point

link

to

receive character position.

latches

the

bands

FIGURE

22.

remain

The

lever

(Fig.

same motion as

of

ti

It.

Ti

It - 2

Operation

to

the

rear

under

the

latch

moves straight down and

23).

This causes

the

The fourth band is then in

the

latches,

double

resulting in

bail,

neither

vertical

the

printing

both

end

three

8

Upper Ball Socket

FIGURE

24A.

Tilt Ring

Rotate Mechanism (Early)-Rocker Portion

Spacer

The

under

socket

for a ba shaped through The lower two mit

ball

the

ba

the

type

side

II

end

and

(\

"J.

of

the

upper

ball

socket

II

joint joint socket.

fits

socket

head

/

--

connection

fits

into

The

over

a pin in

connections

to

be

rotated

~

the

ball

(Fig.

socket

joint

is

the

act

and

ti Ited

Upper Ball

_;--~~I

B~I

Joint

\ )

is

hollow

and

forms

24B). A

over

identical

lower be

as universal joints

Socket

a pin

at

the

dog-bone

that

at

II

socket.

same

extends

both

time.

/\--~

the

ends.

These

to

per-

~

)

the

ti

It

lower ba

ates

to

rotate

As

on

the stee I tape the

carrier.

the

other,

of

the

tape.

the

typehead

pulley

spring

The

rotate

ti

onary cage. rotate

pulley.

than

an

cause

the

tion.

sector

pu Iley

II

sockets

the

ti

It

mechanism,

that

When

the

When

is (Fig.

spring

cage,

with

The

inner

extension

typehead

(Fig.

and

typehead

passes

around

either

typehead

either

rotated

25).

is

of

the

end

of

A spring

spring as

is

24B).

the

ba

in

the

of

the

is

rotated

side

clockwise

the

mainspring

outer

the

spring

of

this

is

required

II

j oi

either

rotate

two

side

pulley

end

of

type

used on

to

rotate

By

means

nt,

the

rotate

direction.

pu

lIey

pu Ileys

pu

lIeys moves

counterc

moves

by

the

tension

type

the

spri

is

connected

must be used

the

tilt

almost a full

of

the

upper

pu lIey

is

operated

and

attaches

away

lockwise by

toward'the

of

the

enclosed

ng

attached

to

a hub on

here

sector

and

oper-

by

the

other,

rotate

in a

sta-

to

rather

pulley,

revolu-

a

to

from

pu

the

II

the

be-

~--

lower

FIGURE 24B. Rotate Mechanism - Rocker Portion

lower

ball

socket

is part

of

The The shaft extends the

tilt

The

rotate

On

both styles

plate

attached bearing bottom

of

operates

well

sector

shaftoperatesdirectly

for

the

inside

the

belowthetiltsectorpulley.

tube

and

the

bottom

to

the

bottom

the

bottom

shaft is

of

the

hollow

tilt

of

the the rotate

a shaft

the

rotate

called

of

the

(On

pulley

have

inside

the

shaft pivots in a

rocker.

shaft.

pulley

similar

Ball

the

tilt

sector

the

been

hollow

This

plate

Attached

in

Socket

rotate

shaft.

tube

gearless

eliminated. of

the

yoke.)

hole

in a

acts

near

operation

and

tilt,

as a

the

to

The right hand moves

only

during

be

stationary attached side frame, it counterclockwise. tion

of

When

the

rotate

in a

clockwise

tive

direction

Positive Rotate

The

rotate

The

latches

to

remain

ferent

leverage

upto

five

rest

position.

tilt

operation.

for

to

the

rotate

exerts

rotation.

left

hand

spring turns

direction. of

differential

are

to

the

characters

This requires more

rotate

pulley

the

shift

the

present.

arm.

a pull on

This

direction

rotate

the

rotation.

Differential

is

much

operated

rear

for

by

under different is

sometimes

is

attached

operation;

The

When

the

is known

pulley

rotate

pulley

This

direction

the

latch

the

bai I. Each

amounts

required

to

the

therefore

left

hand

rotate

arm moves

tape

to

rotate

as

the

moves towards

rotating

is known as

same as

latches

the

bail

of

rotation. on

and

tilt

if

they

operates

either

levers

shift arm

consider

pulley

away

from

the

typehead

positive

the

direc-

sideframe,

the

typehead the

differential.

are

allowed

with

Rotation

side

of

than

and

it

the

nega-

a di

the

for a

to

is

fof

FIGURE

25.

Rotate Tape System

9

Rotate Spring

Shi ft

Arm

---

___

Consider

latches

Ilotation right

in

the

rearunderthe

they

are

the

positive

and

a series of

(Fig.

26).

The

the

latch

bai I. All

latch

pulled forward.

rotation

three

bail

and

of

the

levers

latches

the

latches

are

typehead

are

involved in positive

are

operated

first.

those farthest

are

spring loaded

by

the

Three

to

the

to

bail unless

at

the

left

from

the

differential

to

the

lever

the

latch.

as much as

and

pivots

one-thi

This causes

the

latch.

at

the

bracket.

rd

of

the

right on a stop lug formed out

The

distance

link

to

vertical

be moved down

from

link is

the

pivot point

attached

one-third

to

FIGURE

The two dered rivets

A flat double link lever 'lever

fi

rst I

latches

above

and

ever.

to

it.

one-third

Rotate Tape

26.

on

the

extreme right

a short

extends

The

connection

of

lever

vertically

the

Rotate Bellcrank

Ba

lance

Lever

Rotate Differential At

are

mounted by ball

similar

is

at

distance

to from

the

from

the

tilt

the

right

the

lever

Rest

latch

end

right

shoul-

mounting.

to

a second

of

the

second

end

of

the

FIGURE

The link

ing it

to

tical

link is

from

the second link moves lever. much as vertical

latch.

27.

exerts

a pull on

pivot on its stop lug

attached

pivot point to

The right end

the

latch.

link moves

This Point All Positive

Positive -

the

to

three-fifths

of

Multiplying

three-fifteenths

right end

at

the

lever

the

second

One

the

operating

as much as

Stationary

Selections

Rotate

of

the

left

end.

three-fifths

end

lever

the

two

together,

or

one-fifth

Operation

second

The second

of

the

right

moves

one-third

as much as

On

lever

the

lever.

end

the

caus-

ver-

distance

The

of

the as

second

the

The third

left higher than

A second endofthethird second

The third to

the

as

the of end tation. crank to rotate arm is sometimes referred to as cause as a result clockwise causes and

In

cyc

latch bai

the

latch

one pulled down when

middle latch

latch

is

connected

end

of

the

second

than

the

others to permit

vertical

lever

two-fifths

lever

is an horizontal arm balance

motion between positive and'

of

the

be

the

exert

order

Ie,

one or more of

middle of

is

lever,

balance

A downward pull

operate. A heavy II

crank

movement

of

the

leverage.

a pull on

to

operate

I.

Consider

the

allowed

is

pulled

lever.

other

latches,

latching

I ink

connects

in

the

series.

of

adjustable

of

the

because its ad justment

lever

is held

at

the

to

the

bottom

of

the

rotate

Operation

the

rotate

arm

the

rotate

the

ba

lance

the

latches must be

the

latches one

three

rotate

to

remain under

the

bai I operates (Fig.

down, its

by a ball shouldered

Because its mounting point is the

third

latch

under

the

second

The link is

the

distance

lever

rotate

negative

stationary

left end causes

link

of

the

I ink is increased

to

pivot

tape.

lever for a positive

latches.

the

attached

from

connected

bell

crank.

connects the

rotate

multiplying arm

of

the

about

at

a time starting with

When only

latch

lever moves down

rivet

is much longer

bai I

at

the

lever

attached the

at

It

is referred

balances rotation. during positive

the

rotate

the

bottom

arm. The

at

bellcrank

its fulcrum point

pu

lied down by

bail,

it

27).

to

bottom.

to

the

right

the

middle

the

The right

of

the

counter-

rotate

the

middle

is

the

As

the

left

to

the

end.

amount

ro-

bell-

the

rotate

be-

pulley

the

only

to

The second

leverwhich, ment is sufficient on

the

middle

When

the

rotate characters ment is moves down,

vertical

pivot point thirds as much as rotate-one rotate-two

When both

ing

together, ing

at motion to Movement by

the transferred to characters

When

be used. The left hand its

leverage

the

only one in

vertical

in

type

head.

rotate

latch,

only

the

bell crank

is

obtained

the

I ink is

to

latch. latch.

the

either

end

the

first

of

the

rotate-one

the

in

the

additional

in

turn,

to

The movement is caused by

right hand

at

lever

attached

the

latch; the The right hand

rotate-one

first

(Fig.

vertical

link is

rotate

positive

rotation is

relation

operation.

link

operates

actuates

cause a positive rotation

so it

is

referred

is

doubled,

on

the

first

pivots on a stop lug

two-thirds

therefore

latch.

and

lever

moves straight down without

28). link as is given

three

latch

alone.

bell

crank

direction.

required,

latch

to

the

left

the

rotate

bellcrank.

to

as

the

latch

is

operated,

and a positive rotation

type

head.

lever.

This is

rotate-two

This gives

times as much as when

The

to

is

never

other

The increased

When

the

of

the

link moves down

twice

latch

is referred

the

additional

rotate

the

third

used

alone;

latches,

end

of

the

This

of

one

character

operation

rotate-one

the

movement

right hand

at

the

left.

distance

as much as for

latches

same amount

to

the

type

rotate

consider

from

to

are

two

operated

movement

head

latch

but

to

balance

move-

of

the

latch.

of

two

move-

latch

The

the

two-

the

as

the

operat-

pivot-

of

latches.

is

three

must

clarify

it

to

be

of

10

Negative

Rotation

FIGURE

The

left

hand

ond

lever.

second

lever

rise so

attached

point much as

Movement

latch

the

characters iscalledthe

as

it

to

the the

isoperatedalone.

left

the

rotate-2A

latch

When

to

acts

to

the

latch; latch.

of

the

hand

in

the

rotate-two

28.

Positive - Three Rotate!

is

attached

operated, move as a pivot

lever

therefore

link is

latch

positive

latch.

the

down.

point.

two-fifths

the

twice

Therefore

is

sufficient

direction.

latch,

The right

Operation

directly

latch

of

as much as when

the

to

the

causes

the

end

of

The

second

the

distance

link moves down

the

movement

to

rotate

the

Since

the

left

hand

latch

end

of

the

left

end

the

lever

vertical

from

the

two-fifthsas

the

rotate-one,

obtained

type

head

right hand

is

referred

sec-

of

the.

cannot

link

is

pivot

from,

two

latch

.

to

Positive

the the crank in a

The differential wise, lever any crank be

The right to arm bail right of

E--==--m:II-.--~

rotation

rotate

clockwise

negative

rotate

the

cannot

upward movement in

is

to

raised.

the

five-unit

located

shaft.

end

of

the

rotate

bellcrank

tape.

It follows

direction.

bellcrank

series.

balance

rise,

operate

end

of

bai I assembly

under

When

the

balance

bellcrank.

5-Unit

of

the

wi

because

clockwise,

the

typehead

counterclockwise

then

II

allow

is

controlled

In

order

lever

must be

the

balance

cycle five-unit lever

Drive Link

is

that

the

rotate

for

the

stop lugs on

lever

series.

the

lever

(Fig.

shaft

bail

rises

to

achieved,

so as to

operating

pulley

by

the

balance

bellcrank

raised.

Therefore

right

end

has a

flat

30).

The bai I is a

and

pivoted

is

allowed

allow

clockwise

by

create

the

spring

to

The

the

bracket

of

the

link

in front on

operating

a pull on

rotate

to

lever

operate

left

end

if

the

lever

connection

to

rise,

operation

bell-

rotate

in

the

clock-

of

the

prevent

bell-

must

single

the

The

2A

latch

to

that

of

one characters one-character character character

operated two,

(Fig.

and

29).

rotation.

for a

rotate-2A

is

never

or both

can

the

be

obtained.

rotation

The

four-character

are

used by

other

and

Both

are

rotate-two

operated

itself.

latches,

The

rotate-one

the

rotate-two

operated

rotation.

for a

When

its motion

rotation

latch

together

and

rotate-2A

The

rotate

five·-character

of

four or five

latch

for

latches

-one,

is

added

is used for

two-

three-

are

rotate-

rotation

The

five-unit

latch

at ferential latch

is

-

FIGURE

bail

the

rear

bracket

positioned

30.

is

prevented

(Fig.

31).

and

pivots front to

above

Five Unit Bail At Rest

from

rising by

The

latch

is

mounted

rear.

In

the

head

of

an

adjusting

Latch

Prevents

the

five-unit

to

the

di

rest position

screw

at

Bail From Rising

fthe

the

FIGURE

29.

Positive - Five Rotate

Operation

11

FIGURE

31.

Five-Unit

Bail During Positive Rotate

Cycle

rear

of ward raises spring a

constant

recti

on.

the

bai I

the

bail

attached

five-unit

is a II

comes from

to

force on

bai I. When

owed

to

the

rotate

the

rotate

rise

(Fig.

rotate

arm.

bellcrank

the

latch

is

operated

32).

The force whi

pu

Iley spring

These springs

in

the

Latch Allows Bail

for-

and

the

are

applying

clockwise

To

ch

di-

Rise

tive

rotation

end

of

the

balance

the

amount Operating tion amounts negative-five

positive-two three operation

plus a

one

with

allowing

of

rotation

permits a

negative-five

is

desired,

of

clockwise

or

more positive

negative

combine to

and

(Fig.

it

leveras

the

five-unit

rotation.

negative-five

34). A positive-three negntive-two combination

is

necessary

the

right

movement

rotate

allow a negative-four

to

pull down on

end

goes

up.

of

the

rotate

latches

bail to rise allows

The

combination

rotation. A positive-four

gives a

down in con

positive

gives a negative-

and a negative-five

negative-one

the

This

reduces

bell

crank

different

rotate-one

rotation.

left

•

junc-

and

A

FIGURE

The cam on the the

unit the be

It rest position by

In the be present a five-unit unit bail head. known and

Movement the ofthe tion

32.

five-unit

the

cycle

high

point

latch

bail

bai I

can

latch

bai I is

DOWN

should be

the

rest position

adjusting

cycle.

bail rises

latch

allows

The as

the

negotive

of

low

point

rotate

ofthe

typehead

is

be

in

to

During a positive

(Fig.

a slight type

rotations

the

bellcrank

Five-Unit

bail

shaft.

of

the

driven

UP

the

rest

noted

the

screw in

insure

31).

head

"latched-home"

five-unit

of

the

Bail During

is

restored down by

The high point

other

DOWN

in

the

active

in

the

rest

position.

that

the

cam

rather

there

is a

the

resetting

slightly

This upward movement

clockwise,

rotates

to

occur

bai I

cam

allows

to

permit a five

(Fig.

33).

two

cams.

in

the

position.

position,

five-unit

than

clearance

five-unit

of

the

rotate

before

or

from

position.

from

sufficient

If

Negative

the

of

This insures

active

the

bail by

between bail. latch

or

no

being

restricted

negative the

rest position

the

latched-home

the

latched-home

character

less

than

Rotate

extreme

the

cam

position,

Conversely,

five-unit

is

held

the

five-unit

The

clearance

at

the

rotate

of

rotation

Consider

clockwise

five units

Cycle

right

hand

is

90°

from

that

when

the

five-

when

bai I wi

down in

latch.

the

latch

must

completion

cycle,

by

the

five-

the

five-unit

of

the

to

a position

all

positive

position.

point

movement

negative

of

nega-

II

the

and

of

the

type

to

rota-

FIGURE

KEYBOARD

The

keyboard keylevers differential pares

the

cle

clutch

Keylevers

keylevers

The A rubber and

the

bottom

travel

of tension on port

to

stabi I

34.

section

and

allied

latches.

selection

latch

pivot

covered

of

the

keylevers

each

keylever

ize

Negative-Three

SECTION AND CHARACTER SELECTION

is a compact

parts,

and a selection

Depression

mechanism for

to

allow a cycle

on

a fulcrum rod

rod limits

the

keylever.

the

guide

comb slots I imit

in

the

front

operates

Rotate

unit

of

any

operation

operation.

upward

guide

in

the

Operation

that

contains

mechanism for

printing

and

at

the

rear

travel

of

the

comb.

keylever

all

keylever trips

the

(Fig.

the

keylevers

downward

A lower

bearing

the

pre-

cy-

35).

ex-

sup-

FIGURE

33.

Negative-Five

Rotate

Operation

The keybuttons the

use

form a concave

Keylevertension

the

front finger under

the four rows keylever

to

offset

levers.

operating

A

shoulder

the

rear.

holds

the

and

is

of

an

interposer

12

are

designed

of a keyplate

of

the

is

cupped

keylever.

of

letter

springs. The auxi I

the

leverage

This

variation

force

rivet

A small spring

pawl in

formed

unnecessary.

slope

issupplied

keylevers.

so

that Different

keylevers

difference

requirement

attaches a keylever

the

under

the

(Fig.

35).

in

the

shape

of

a pyramid

The tops

to

the

keyboard

bya

set

of

The forward

the

spring

wi

spring

tension

by

auxi I iary

iary

spring fingers

among

in spring tension results in a uniform

for

all

keylevers.

pawl

attached

rest

keyleverin

from

position.

the

The pawl

position to strike

of

for

ease

flat

spring fingers under

end

of

II

maintain

is

leaf

springs

the

four rows

to

each

pawl to

to

the

keybuttons

of

operation.

each

spring

its position

supplied

under

vary

in

length

of

keylever

the

keyle~er

extends

below

the

make

to

the

key-

top

at

Selector

Latch

Adjusting

it

possible

lever

and

Interposers

Each

keylever

(Fig.

35).

of

ti It

and printing hole

which the are as the and

The with

has a lug On Seven

of

posers

tive

point. A large

in

the

front

allowe-dtomove

front

to

top

of

up

into

interposers

its own

on

the

bottom

of

the

these

lugs in

different.

lug is for

lugs just

to

keylever

The purpose

rotate

interposers

and

the

adjust

ha~

needed

front

of

rear

rear.

rear

the

rest

have

operation

top

in position

of

lugs

are

different

There

special

to

a

An

guide

the

rear

of

the

relative

pawl.

character

of

each

can

separates

up

and

extension

position.

~several

interposers

selective

applications

interposer

the

interposers

to

bring

fulcrum rod passes

interposer

pivot

the

down in

spring from

comb .loads

lugs

to

perform

to

be

lugs.

pO,sition

are

no two

FIGURE

the

top

row

height

of

each

located

is

to

the

desi

re~d

through

and

provides a support on

and

sl

ide. A guide

interposers.

the

rear

each

the

interposer

extending

(Fig.

36).

struck

by

ar~

positions for

The

obsence

combinations

alike.

of

The rearrnost selec-:-

the

machine.

35.

Keyboard

of

keybuttons individual

just

below

select

the

character

an

elongated!

comb

The interposers

guide

combaswell

interposer

to

the

from

them,

Each

interposer

the

keylever

eight

or

presence

makes

the

make

key-

it

amount

to

the

at

to

rear

each

pawl. lugs.

inter-

Section

and

Character

One

lug on

wide

lug

located

to

release

is

a

keylever

bail

that

pivots up

of

any

character release The to the

Fi

When

to cycle

rotates

shaft

the end cyc

When moved down in front

filter

operate

cycle

prevent

parts

Iter

Shaft

the

unlatch

shaft

located

ends

and

Ie

shaft.

an

shaft

the

are

the

of

is

the

Selection

the

bottom is common

at

the

cycle

is

depressed.

and

interposer

cycle

clutch

release

interference

restoring

interposer

the

cycle

(Fig.

35).

fi

Iter

shaft 180

at

the

interposers.

connected

interposer

turns,

the

character

the

middle

clutch

Directly

down

latch

lug is

between

to

the

is depressed

clutch

Rotation

0

rear

of

the

by a

gear

is

depressed,

of

one

blade

selection

to

all

of

the

interposers.

for a

cycle

operation

below

(Fig.

35).

Downward movement

forces down on

and

allow a cycle

cut

at

an

angle

the

lug

and

rest

position.

it

pushed

and

cause

a 1800 rotation

of

the

cycle

•

The

fi

Iter

shaft is a

keyboard

It

rotates

trai n on

blade

drives

mechanism.

the of

the

section

ina

the

rear

the

fi

interposer

interposers.

Its purpose

whenever

the

lug

is

the

cycle

operation.

on

the

cycle

the

cycle

shaft 1800 also

two-bladed

and

beari

ng

at

left

si

de

of

the

interposer

Iter

shaft.

forward

It

is

the

cycle

bail to

bottom bail as

bai I down

of

the

just

be

low

each

of

th(

As

the

to

a

is

Keylever

o

I

S

e

ector

Pawl

Contact

Rl

R2

~~

L

ug

Cycle

F

I

GU

R2A

RE

Surface

R5

Clutch

36.

Tl

12

Release Lug

Se I

ector

Latching

Surface

c~

Filter Shaft

Contact

Interposer

Surface

Interposer Latch Spri ngs

Resting called

are

rest. snaps forward poser

the extension

against

the

interposer

slightly

spring

deflected

When

any

over

remains down until

finger.

spring.

13

the

rear latch

to

interposer

the

interposer

At

that

of

each

interposer

spring

(Fig.

the

rear

when

moves down

and

holds

it

is pushed forward

time

it

is raised

is

a spring

37).

The spring fingers

the

interposers

at

the

rear,

it

down.

enough

and

restored

finger

are

the

spring

The

inter-

to

cl'~ar

by its

at

Selector

In:]OSer..

'I

[i

I U I Ball

A.

INTERPOSER

FIGURE

An

interposer

the

in occurs. ward

Selector

path

without erroneous rotate

ti

It

With

this

just as

forward. The

as

pleted. erratic

Selector

The

two be poser ward wrong each pensator The compensator vent neously balls ward movement

the

soon as

typing

selector

keylevers

operated

at

together

character

interposer

downward movement

shift in

Compensator

/~~yr

(]r~e~e~tor

AT

37.

Interposer Latch

must be

of

the

Unless

latched

being

character

3).

latching

This

Compensator

a time

attached

(Fig.

device,

previously depressed

second

the

cycle

is

known as

rhythm.

compensator prevents simultaneous depression

insuring

down

and

were

and a selection

to

operates

to

contains

380).

the

tube

of

any

Compensator

Tube

Lot:il/_

Compensator

REST

latched

fi

Iter

down,

driven

because

interposer

operation

that then depressed,

print.

the

When

of

other

Ball

shaft

one

character

in a rear

closely

of

the

B. INTERPOSER

DOWN

and

Selector

down

to

insure

blade

unti I

the

interposer

forward. This would result in an

of no

character

interposer

wi

for

only

one

forward. If more

they

error

A hook shaped lug

device interposer

spaced

two

or

an

interposer

compensator

interposer

can

II

then

be

the

first

storage

interposer

would be

would result

called

guide

steel

more interposers

to

(Fig.

:.

Compensator

that

it

wi

cycle

could

selection

be

latched

is

being

operated

interposer

and

tends

at

a time

than

operated causing

at

the

selector

comb

balls

is

down, block 38b).

LATCHED

II

remain

operation

restore

up-

(+

5

down

operated

forward is

com-

to

even

can

one

inter-

for-

the

rear

of

com-

(Fig.

37).

that

pre-

simulta-

the

steel

the

down-

of

The hook portion

to

the

center

poser

is

driven forward lug will not be can

be

depressed.

not

have

to

actuating

An the are balls they the that

Selector

Seven they front

interposer selector an forward

Seven sliding interposers

cated

interposers

Each of a selector

latch latch interposer. interposer

The

prevent

poser lugs. This prevents against also

restored to

An selector a

latch

to

that

downward by

Cycle

another.

adjustable

balls

somewhat

thus

prevented

were

would

keyboard

the

steel

Bails

se

lector

can

operate

of a selector

containing

bai

interposer,

by

under

latch

interposer

interposers

latch

the

help

prevent

adjustable

latches

interposer

Clutch

of

the

I ine

of

the

between

With

wait

unti I

stop

at

each

centered

from shi"fting

allowed

partially

Is

that

the

operate

interposer

An loads interposers rest

bai

bailsas

the

to

block

touch

would

balls

may be removed

and

Links

bai

Is

are

forward

lug position on

all

are

moved

the

bai I for

interposer.

left

end

has a lug

bai

I.

As

is moved forward by

are

paired

extension

the

interposer

Is

from

the

selector

rear.

I ink

connects

of

the

differential

ismoved

is

pulled

the

latch

Latch

interposer

steel

balls

after

being

the

steel

this

arrangement,

an

interposer

end

between

move

too

the

depression

suffer.

mounted

and

back

its lugs

forward.

that

position wi

called

of

the

se

that

the

selector

so

that

spring

and

against

being

forced

the

selector

interposers

bails

each

forward,

forward

bai I.

lugs

extends

(Fig.

depressed

balls

and

is restored upward before

of

the

compensator

the

too

for

far under

The stops

and

between

(Fig.

the

interposers.

is

driven

If

any

the

latch

lector

bai

extends

bai I

the

each

at

the

its

selector

ac'justable lugs

against

interposers

are

depressed.

from

latch

interposer

mechanism

the

selector

to

prevent

to

37).

When an

at

the

another

the

operator

interposers.

left

or

right.

the

interposer

of

an

interposer

are

removable so

cleaned

35).

lug

interposers

is

bai bail bottom

bouncing

if

the

si de frames so

Each bai I

forward,

is

absent

II

not be

Is

(Fig.

up

directly

moved forward,

I.

The bai

operates

of

bail

at

the

selector

from

The stop lugs

to

(Fig.

latch

its be ing

the

rear

inter-

rear,

interposer

does

tube

keeps

The

balls

If

lugs,

necessary.

is

When

an

all

the

from

operated

are

lo-

35).

These

in front

Is

and

only

each

latch

to

the

rear.

the

rear

inter-

binding

as

they

one

of

35).

When

connected

operated

just

the

and

in

the

one

to

are

the

00

A.

Simultaneous

Second

B.

FIGURE

38.

Keylever

Keylever Depression Blocked

Selector

Depression Blocked

Compensator

Action

Although clutch

It is through depression

allowed

The power frame. It pivots sition plate, tion from

latch

I ink assembly cl utch tween

not

latch

to

operate.

cycle

clutch

just in front

mounted in rubber on

of

the

sleeve

tightening

is

held

latch

the

two parts

14

actually

is

in

pawl pivots on

directly

latch

thereby

on

this

that

a part

related of a keylever

pivots on a

from

of

the

cycle

position by

extends

rotates

of

the

keyboard

to

the

top

cycle

clutch

the

rear

preventing

clutch

the

cycle

forward from

the I ink.

the

front

of

section,

keyboard

that

the

bracket

and

of

pulley

the

at

rests in a

sleeve. A thin

the

latch

the

cycle

hub

clutch

the

latch.

An

extension

pawl up

the

cycle

mechanisms.

cycle

clutch

the

front

of

vertical

metal

prevents

clutch

(Fig.

latch

into a latched

spring

39). pawl

The

cycle

spring

rota-

is

the po-

The

and

be-

position

clutch

cycle the a pull

pawl,

pulled

When

lever

moves

behind

keeper

cl utch

front

toward

being

forward.

the

forces

the keeper. allowed gaging spring

A small

side

of

to

the

to

lever,

the extension extension damper has and

holding

dampers

is bail so as upward bounce

limit.

down

cycle.

Cycle

Bail Damper

the

is

keeper

of

the

attached

keylever

the

cycle

clutch

The

extension

snap

latch

tighten

called

keyboard

of

each

spring

the

dual purpose

the

to I ightly

to

prevent

Without

and

cycle

an

adjustable

bracket,

keyboard

front on

to

is

depressed,

cycle

bai I

latch

the

I ink

from

the

and

begin a cycle

the

just

lever

connected

damper

retard

the

retrip

the

Cy.CI.

clutch

to

section.

the

the I ink,

to

pawl down

spring

and

cycle

clutch

cycle

above

rests

against

between

of

against

the

bail

the

dampers

cycle

Filter

FIGURE

keeper

plate

the

cycle

the

pivot

(Fig. mounted, guide

An

extension clutch

prevents

interposer

downward.

comb support under

the

disengaging

at

the

front

of

clutch

latch

sleeve.

This

operation.

bai I

damper,

the

cycle

bail

the

front

the

cycle

restoring

the

bai

the

I;

The purpose upward movement from

bouncing

the

bail has a

clutch

creating

Shaft

Cy.

CI.

Latch Link

39.

39).

The

by means

spring

latch

link.

I ink from

beneath

The

the

cycle

it

from

I ink is

forward disen";

allows

the

pivots

(Fig.

40).

of

the

bail.

bai I

and

cycle

bai I upward

of

the

as

it

reaches

tendency

an

additional

Cycle

cycle of

the

exerts·

The

being

key-

bai I the

then

cl utch

at

each

An

each

of

the

cycle

An

its

to

Clutch

Latch Mechanism

Early

Style

cycle

For a rotation. stored

and

the

cycle

vice

pivots on

shaft

rotates

forces

the

and

restoring arm

to

the

rear

to

stop

the

tothe

"rear

cycle

clutch

Late

Style

The new

ofacamand

latch

restoring

the

cycle

the

cycle

chine

just adjustable ing a restoring

When

the

directly

is (Fig.

41). pawl is pushed swing forward cycle

clutch

sion drops down

Restoring Mechanism.

operation,

This means

held

to

clutch

the

during a

restoring follower

and

pushes cycle to

permit

keeper

the

cycle

that

the

rear

into

sleeve. A two-piece

cycle

clutch

cycle

to

actsasone

cI

utch

the

and

the

cycle

sleeve.

cycle

maintain

piece;

Restoring Mechanism

style

cycle

clutch

a cam

follower.

cam,

is a double

shaft

(Fig.

41).

The cam follower

clutch

latch

which

above

the

restoring

steel

roller

mounted on

operation.

machine

below

is

(but

at

rest

not in

Whenakeylever

off

its

keeper

releasing

latch

onto

the

swings forward

the

Cy.

shaft must be

cycle

clutch

the

path

of

latch

the

limited

second

adjustable

latch

bracket.

operation, a blade

the

rear

(Fig.

thus

the

clutch

latch

The

latch

clutch

latch

the

parts in

latch

restoring mechanism consists

The

cam,

of

40),

restoring arm moves

back

is

restored far

pawl

to

the

called

the

lobed nylon cam mounted on

is

an protrudes cam.

the

low point

contact

is depressed

allowing

cycle

restoring

it

the

to

The

which

with)

the

clutch

steel cam.

the

rear

extension

riides on

of

the

cycle

clutch

sleeve.

roller

As

the

Cam Follower Restore

CI.

Latch

to

180

must be

restoring As

the

step

the filter

re-

on

de-

filter

shaft

The follower

into

position

enough

reset on

rest

cycle

the

position.

clutch

extension

of

the

ma-

has a small

the

cam

dur-

restoring cam

steel

roller

clutch

latch

latc.h

When

the

on

the

exten-

cam

rotates

0

of

to

Cam

FIGURE

40.

Restori ng

Cycle

Clutch

Operation

Arm

/'

Latch Restoring

(Early Style)

15

FIGURE

41.

Cycle

Clutch

Operation

Clutch

Latch

Latch Restoring

(Late Style)

towards its high point cycle

clutch

latch

to sleeve. the

Operation

Depression lever The

I ug the the on cycle poser topofthe the trips cycle

The 'latch

cycle

clutch

of a letter

to

move down as keylever of

an

interposer.

rear

ofthe

interposerfulcrum rod.

the

bottom

clutch

allows

interposer to

same time

the

cycle

clutch

is

latch

pawl

at

interposer

of

the

latch

pawl down. Further movement

the

interposer

that

the

clutch

to

begin

the

steel

roller

is forced up swinging

the

rear

into

the

restored far enough

pawl

to

reset on its

keybutton causes

the

rear

end

pivots

the

rear

of

the

keylever

Further movement

to

move down as

As

the

interposer moves

interposer forces

latch

spring

maintain

interposer

an

its downward

latch

pawl

operation.

latches

off

path

of

the

to

the

keeper.

the

front

about

contacts

of

the

front pivots

the

cycle

to

snap forward

position.

down,

its

keeper

cycle

rear

to

of

the

ful

crum

keylever

down, bail

of

the

cycle

to

allow

clutch

permit

the

causes

and

over

At

the

key-

rod.

top

about a lug

the

inter-

the

about

bail

the

interposer ment insures a single lever

is

Key-Lever

Some machines require key levers located the

key tension spring the

N/O

PRINT SELEC.TION UNIT

The print

lower

left

1.

2.

3.

held

depressed by

Contacts

in

the

lever

that

contacts.

selection

corner.

Se

lector Selector Selection

lug

ready

for

operation

right front

normally

instead

operates

unit

is mounted

It

consists

magnet assembl y latch

pusher assembly

contact

the

operator.

corner

operates

of

assembly

regardless

against

of

three

operation.

of

how long

operate

the

against

to

N/O

keyboard.

the

operating

the

power frame in

basic assemblies.

This

contacts The

flat

key-lever strap

arrange-

the

key-

end

of

the

As

the

cycle

shaft turns,

latch

bai I

down.

However,

so

that

cycle

shaft

rotation movement shaft cams, the interposer forward.

As present on the interposer push

forward. The bails

tor

The the

interposer

The

path The interposer spring the time shaft cams far the

unti I

has

except The

been driven down

If

the

the the deflected

lever

Keylever.

Spring

of

the

latch

filter

the

interposer

latches

rear.

forward.

latches

interposer has been pushed forward far enough

fact

bai I

the

restored.

negative-5

rear interposer restores

latch

that

of

the

This allows

the

latch

plate.

cycle

that

keylever

edge

to

is

released

are

pulled forward

spring, it becomes free

the

interposer

fi

Iter shaft allows it

bail

enough

The

operation

The same

its bail is

latch

has been

of

the

rear

(Fig.

FIGURE

the

cams

of

the

contour

does not cause immediate downward

bai

I.

During

shaft

is

operated

is

driven forward,

their

cause

the

latch

cannot

then

raises

the

latches

wi"

have

been forced down by

to

prevent

latches

to

its rest

interposer lug strikes

and remains in this position unti I

42.

has

been

action

allowed

resets

position.

held

to

the

42).

At

Keylever

merely rest

appl ies to

above

down throughout

rear.

that

of

the

to

the

respective

interposers to pull the

only

for

move up

to

be driven

interposer

to

restore to

resetting

completed

to

rise in

its bai I when

The

time it snaps forward

Held

cycle

the

cams

"dwell"

drive

selector

an

instant.

to

restore

instantly

farther

and

the

of

the

against

and

the

negative-5

the

operated

the

keylever

Depressed

shaft force

is

designed

on

the

depressed

lugs

that

selector

selec-

As

to

clear

vertically.

out

of

forward.

restores it

rear.

By

the

cycle

latches

the

bai I

the

latch

position.

the

bai I has

operation,

pawl as

pawl

is

the

Deflected

the

cycle

are

bails

soon as

its

the

to

this

under

plate

bail

latch

then

key-

above

Selector

There and

Trip Mechanism

Impulsing a magnet causes its armature

The

bai is pivots

latch spring loaded toward latch moves forward

lever

out

latch inhibitor latch.

wi restore spring on of

Magnets

are

seven magnets used in

rotate

selection

FIGURE

operating

I.

As

connected

about

lever

pivots toward pivots through an

of

the

restoring will restore

II

restore behind

the

cycle

end

the bai I

to

the

its pivot point

disengages with

moves

against

path

of

pawl

to

restore into

At

this

time,

the

clutch

latch,

43.

of

the

armature strikes

is

operated

latch

the

cycle-clutch

off

the

cycle

arc

the

cycle

the

the I ug

latch

trip

bail.

this

plus

one

Selector

to

lever

(Fig.

and

the

trip

lug on

cycle

clutch

and

pulls

clutch

the

trip

the

latching

on the lever

the

clutch

path

surface trip

and

unit,

for code

Magnets

to

rear,

44).

hook on

lever.

latch,

trip

lever,

latch.

latch

the

inhibitor latch. lever

and

of

the

lever

the

mechanical

one for

check

move

to

the

cycle

it

pulls a I ink

The

latch

the

end

The

trip

so when

the

As

the

inhibitor

The

cycle

also

cycle

of

the

because

each

tilt

(Fig.

TI

R2A

RI

R2

R5

the

rear.

clutch

lever

of

the

lever

the

trip

the

trip

pawl down

clutch

allows

clutch

latch

lever

of

the

restoration

43).

trip

that

is

lever

the

16

e«)~,--_--Cycle

Clutch

Latch

Latch Lever

Inhibitor Trip Lever

Latch Pusher Bail

---_

.

.......;:~~=--....._---!:-...-~

Operation

FIGURE

44.

Cycle

Clutch

Sleeve

Trip Bail

(0

Cycle-Shaft

FIGURE

0

45.

Latch Pusher Corns

Two

other

cams

ore

on the

cycle

cam shaft assembly.

are

They

shaft.

The purpose bail.

print~

.....• , ..•

a.:.g

..

net

rdI

As the shaft causes cycle (Fig.

located

They

the

cycle

latch

pusher bail

clutch

47).

Latch Pusher Cam

between

are

called

latch

of

the

corns

is

shoft begins to

(Fig.

the

pusher bail to lower

latches,

the bail

the

positive cams on

pusher corns.

tooperote

turn,

45). Further rotation

the

the cam follower arms raise

(Fig.

is

restored to its rest position

the

cycle

selector-latch

of

the

46). When

pusher

cycle

the

FIGURE

46.

17

Armature

FIGURE

47.

Selector

The the

There

cluding

Latch Pusher

selector

power frame by a

are

seven

the

latch

pushers pivot on a shaft

bracket.

latch

pushers;

code

check

latch.

one

for

each

that

is mounted

selector

latch,

to

in-

The purpose

lector

The

latch

When

As

the

pusher moves forward,

latch

of

the

latches

the

wi

forward from under

pushers bail rises,

pusher pivots on

II

be pushed forward,

latch

are

pusher

is

to

the

spring

loaded

the

tail

of

the

shaft,

the

contacting a selector

away

move

the

unwanted

selector-latch

toward

the

pusher

pusher follows

operating

from

the

bai I

Latch Extension

Latch

bail.

the

end

or

latch.

(Fig.

Pusher

se-

bail.

top

The

48).

of

Tail

Pusher Bail

Selector

Armature netism

and

The

cycle selection the

pusher-bail trip

bail. selector

FIGURE

Armature

knock-off

to insure

clutch

magnet

The

trip

armatures

49.

Latch Pusher Restoring

Knock-off

is

provided

that

trip

bail provides a positive

armatures.

cam-follower

bail restoring imparts

(Fig.

50).

to

the

armatures restore

An

eccentric

arm restores

overcome

the

any

residual

quickly.

knock-offforthe

knock-off

the

knock-off

stud on

cycle

mag-

clutch

to

the

Selector

It attracted ated. ing

pusher starts to rise

Because the fore, to

Restoring

The

pusher

causing moves

under

The pusher. bail must restore the be in

pushers the

- Latch Pusher Bail FIGURE

is important

wi

II

This

is

the

latching

the

armature

pusher

could

the

selector

be

operated

the

selector

bail.

the

pushers

to

the

selector-latch

armatures

the

notch

are

against

armatures

48.

to

note

that

keep

their

respective

accompl ished by

surface in

(Fig.

47).

kept

not

push

latch

is

as

the

bai I moves

Selector

latch

The bail forces

rear,

to

(Fig.

Latch Pushers

pushers

to

pivot

allowing

fully

restore.

of

the

49).

bai

armatures.

pusher bai I

Selector

the

left

are

on a shaft.

I.

the

- Latch Pusher

selector

latches

the

tai I of

notch

tai I of

latch

away

under

down.

restored by

the

tails

the

selector

pushers far enough

The

tails

and

armatures

from

being

the

pusher

of

the

armature

the

pusher from rising,

from

the

selector-latch

the

selector-latch

of

the

pushers

The

top

of

latches

of

the

pushers should

At

rest,

the

should not be

that

were

oper-

contact-

as

bai

I.

down,

the

pusher

to return

to

allow

tai

Is

of

touching

not

the

There-

bail

the

Cam Follower

FIGURE

SELECTION

The

selection

is

fastened

the

selector

check

and

the

(Fig.

51).

50.

CONTACT

contact

to

the

power frame. It

latches.

bottom

Selector

ASSEMBLY

assembly

The upper

contacts

Pusher

Armature

is

mounted

is

contacts

are

the

Knock-off

to a bracket

located

directly

are

used for

transmitting

that

below

code

contacts

18

.-----

MOUNT'

NG

SCREWS

CONTACT

The

extension

latch

bai I stri kes

pushed down in its cross bars tor-latch spring

tension

that bail

of

operate restores, of

the

guide.

the

latch

that

contact

The bottom

the

contacts

the

contacts.

is

being

actuator.

contact

carried

The

of

the

(Fig.

52).

actuators

down by

actuator

When

rise under

wi

has

the

II

be

two

selec-

the

MOUNTING

BRACKET

Contact

contact

A that

remain under

FIGURE

Actuatol

actuator

51.

will be

the

Print

Selection

operated

selector-latch

TRANSMITTING

CONTACTS

Contact

by

bai I during a

Assembly

the

selector-latches

selection.

The five not

five unit bai I

tension

Code

The purpose ber

Code selector tor contact.

used to

acter

In a machine

(pulled

latch under

tacts,

unit

pulled

of

Check

of

selector

checking

latch,

latch

trip

is

selected.

down by

may be

the

failures

forward.

the

has no

When

bail.

actuator

to

rise.

contacts

(Parity

of

code

latches

requires latch

mechanical in

the

cycle

where

the

pulled

By

of

is

Operating

Check)

check

pusher

the

clutch

more

bail),

down,

always

this

type

operated

The

contact

(Fig.

is

are

active

the

addition

and function,

out-put

than

if

or a

transferring

can

when

the

-5

unit

actuator

52).

to

determine

during a print

of

another

magnet

mode

when a plus 5

one

a failure

desired

be

(Fig.

other

the

code

selector

occurs,

latch

an

recognized

five unit

latch

allows

rises under

if

the

correct

selection

selector

53).

The

than

to

operate

check

rotate, 3 tilt

latch

must be

an

unwanted

may pop

odd number

immediately.

latch

is

the

num-

cycle.

bail,

selec-

a

magnet is

char-

active

out

from

of

con-

FIGURE

52.

Contact

19

Actuators

Depending check

may

Code

check printed, active.

on

be

only

the used.

does

that

Check

FIGURE

printer

not

insure

the

correct

Latch

53.

wiring

that

Check

either

the

number

Latch

"odd"

correct

of

selector

or

"even"

character

latches

has

bit

are

been

forward an

cycle

As

down, a special

rotated

out

block switch of

A shaft

backspace, when

locked.

Keyboard Lock

The

the

that

contacting

extension

clutch

additional

into

bail.

the

downward

is

ON,

the

selector

link

from

beneath

the

switch

keyboard

powerframe.

is

bolted

of from

the

This forces

the

right

the

spacebar,

lock

to

the

pawl

the

cycle

being

released.

insurance

bellcrank

selector

keyboard

compensator.

operational

is

Solenoid

The

the

against

compensator

the

movement

side

of

carrier

OFF.

solenoid

frame

stop

clutch

at

the

steel

lock

the

lockout

mechanism.

return

The

tab

is

mounted

is

(Fig.

which latch

pawl,

an

interposer

left

side

by a I ink from

balls

to

of

all

interposers.

bellcrank

bail

and

shift

held

by a U-shaped

54B).

is

positioned

and

being

of

the

shift in

to

the

is

spring-loaded

rotatesaD-shaped

The shaft locks

indexing

keylevers

the

bottom

below

prevents

latched

keyboard

the

lock-

tube

When

keylevers

are

side

bracket

the

is

and

the

out

the

not

of

Feedback

This

contact

printer.

selection

provide prevent operation.

On

the

tripped motor from wanted

Operation mechanism the switch

gating any

some

keyboard

whi Ie

operation

bottom

lever

Contacts

The purpose of

and

machines

having

of

by of

(C

1-C2)

assembly

checking

other

must

the

rotating

the

is

of

the

print

function

KEYBOARD LOCK

when

be

locked

motor is

to

start

the

keyboard

in

the

OFF

located

C1

is

contacts.

magnet from

the

ON/OFF

to not under

time

level

the

lockout

section

position,

Selector

on

the

left

to

provide a gailng

The purposes

pulse

and

taking

place

switch

prevent

running.

a load

the

controls

Compensator

mechanisms from

This is

and

switch

the

bai I

that

(Fig.

54A).

the

lockout

hand

side

time

of

C2

to

electrically

during a print

is

turned

to

prevent

to

prevent

is

turned

ON.

keyboard

extends

lock

across When bai

I is moved

of

for

are

OFF,

an

the

to

being

the

un-

MOUNTING

FI

GURE

Lockout Lever

BRKT.

54B.

SOLENOID

Keyboard

Lock

BELLCRANK

Mechanism

FIGURE

Switch

54A.

Lever

-~f'l"-;:

Keyboard Lock

-

ON

Position

Mechanism

(Early)

20

bracket

A

fastened mounting et

by a

The

lock-out

the

lock-out

spring is This

causes

noid

is

The

sloped

er.

As

it

is

installed,

holds

to

the

bracket.

shoulder

lever

fastened

the

not

energized.

surface

the

lever

the

top

pivot

lever

front

moves

the

lock-out

of

the

The

screw.

is

contacts

to

the

of

the

roller

lever

power frame

lock-out

positioned

the

rear

of

the

lever

lock

-out

up

or

down,

wi

II

be

in

place.

and

lever

front keyboard the

lever,

to

move up

lever

depending

cammed

to

is

fastened

to

rear.

lock

pull ing it

contacts

forward.

The

bracket

the

solenoi

to

The front

bail

anytime

the

on

which

the

roller.

down.

the

bai I

Figure

is d brack-

of

A

sole-

roll-

way

55

shows noid the

keyboard

FIGURE

the

lever

energized.

55.

installed

Figure

with

the

Lockout Lever -

to

lock

the

56

shows

the

solenoid

de-energized.

Solenoid

keyboard

lever

installed

Energized

with

the

to

sole-

lock

1.

The

functional

2.

The

keyboard

3.

All

44

character

4.

The

machine

in

upper

5.

Cycle

Functi ona I Keylevers

The

functional

end

of

the

able

clamp.

fastens

to

a be

that

mounts

ward

the

front, direction. front,

moves

comb

to

move

wi

case.

clutch

pawl

keylevers

bai

I.

The link is

The

end

Ilcrank.

it

to

the

The arm on

to

the

to

the

key

levers

are

lock

contact

interposers

II

be

is

of

The be Ilcrank pivots

keylever

be

IIcrank

the

right.

right

is

are

returned

locked.

are

locked

fastened

the

link

support.

is

rotated bellcrank, The be IIcrank a lIows

under

its spring

locked.

operated.

locked.

to

lower

by

the

to

that

extends

As

that

the

in a

extends

tension

case

if

link on

bai I

by

to

the

around

link moves

counterc

the

it

is

the

an

front,

the

lockwise

to

the

lockout

(Fig.

locked

right

adjust-

screw

to-

57

A).

Bai

I Roller

Solenoid

FIGURE

Keyboard Lock Bail

bail

A means by

the

pri

bail

cause

Shift Lock Link

~,:-_

is

installed

of

locking

lockout

nter,

the

56.

lever

three

following

Slide Assembly

~~,~

Lockout Lever -

in

the

"Selectric"

the

various

and

Ii nks

functions.

as

the

and

a s Ii de assemb

(Fig.

bai I

57A).

Solenoid

I/O

Printer

The

is

rotated

Iy

Lock-out

De-energized

bail

to

fastened

It

n

erposer

to

provide a

is

operated

the

front of,

to

Lever

the

L k

oc

The lugs on them from

FIGURE

Spacebar

Because be space-bar the the being

the

locked

arm on spacebar

depressed

the

being

57B.

spacebar

with

shaft.

the

bellcrank

lock

comb move

depressed.

Shift Lock

Contact

the

comb,

When

collar.

(Fig.

under

their

keylevers

link

Lockout Lever

Keyboard Lock Mechanism{Early)

does not

58).

operate a key

a lock

the

keyboard

moves

to

This prevents

collar

the

is

lock

right

the

to

lever

fastened

be

Ilcrank

under

spacebar

prevent

and

to

the

rotates

the

step

from

cannot

I

on

Spring

Lockout Comb

FI

GURE

57

A.

Keyboard Lock Mechanism (Late)

21

FIGURE

58.

Spacebar

Lock

Collar

Lock

Collar

Keyboard

Lock

Contact

Assembly

contact

A This is

accomplished

by

the

keyboard

44

Character

A

bracket

the

keylever

forward.

locks

the

44

Character

When

the

connected

lock

pivots

vents

depression

Shi ft Lock

A

bracket

the

shift

lock

interposer

is

transferred

Keylever

on

the lock.

The

link

keyboard

Interposer

lock bai I moves forward

to

the

forward

Re

lease

on

the

lock

latch.

link moves

(Fig.

59).

when

the

by a tab

lock

bai I (Fig.

left

end

The

operates

as

previously

interposer

under

of

all

left

end

forward.

on

Lock (Early) - Figure 57B

of

the

keyboard

the

Lock (Late)

lock.

the

character

of

the

When

the

keyboard

the

57A).

key

lock bai I pushes

keylock

described.

it

The bottom

interposers.(Fig.

keyboard bai

I moves

The link

Shift-Lock

bellcrank

lever

lock

interposer

pulls on

interposers

lock

operates

lock

to

is

operated.

that

is

bai I operates

the which

the

link

of

the

interposer

and

57A).

bai I operates

the

front,

the

shift

Interposer

operated

link

which

pre-

the

lock

~

Shift Lock

~

is

Sh

•

FIGURE

59.1

Shift

i ft Lock

Lock

Magnet

Release

(835 Printer)

The

shift

at

both

poser

to The lock is shift

key.

.

Shift

Lock

! A

magnet

;

net

is

mounted frame. lug on

'net

is

energized

shift-lock

lock

ends

the

The

Release

assembly

The

the

shift-lock

interposer

FIGURE

interposer

by a guide

front,

the

pushed

away

machine

(835 Printer)

to a

magnet

the

59.

moves front

comb.

interposer

from

wi

is

used to

bracket

armature

interposer

armature

forward,

Shift-Lock

As

the

contacts a stud

the

shift

II

return

release

on

the

lower

extends

(Fig.

moves

releasing

Interposer

to

rear.

link pushes

stop,

to

lower

the

shift

left

upward

59.1).

forward,

the

It

is

supported

the

on releasing case.

lock.

keyboard

and

contacts

When

pulling

shift-lock

the

The

the

inter-

lock.

the

mag-

side

mag-

latch.

Cyc

Ie

Clutch

Paw I

Stop

Mounted the which

As pawl pawl,

The purpose

1800 in upper i ng same

Thus, causes

The clutch, mechanism ational area

Shift

The

a

ward sufficient tation. keylever

bail

is

connects

the

slide

stop

and

the

case

upper

ti

It

depression

an

shift

clutch

shaft.

.

Operation

shift

the

The

on

the

lock

the

slide

assembly.

to

the

assembly

is

positioned

prevents

counterclockwise

hemisphere

case

band

upper

mechanism

takes

operates right

pull on

is

held

of

the

characters.

as its

of a keylever

case

control

its

All

by

(Fig.

the

pulley

depressed.

the

shift

lower

consists

power

the

60).

remains in

bai I and

cycle

moves forward

of

character

moving

rotate

spring

The

clutch

under

an

cycle

clutch

SHIFT

mechanism

direction.

the

typehead

Each

case

counterpart,

with

to

of a shift

mechanism

from

the

components

the

The

movement

tape

this

extension

upper

right

loaded

slide

pawl

with

from

is

to

the

print.

and

right

are

to

cause

position

to

operate assembly stop

(Fig.

the

lock

of

the

being

released.

rotate

the

This

action

near

the

platen

case

character

but

shift

in

operation

arm,

shift

interlocks.

end

of

the

concentrated

hand

rotate

of

the

pulley

1800 type

as long as

with

has a

link

57A).

bail

the

cycle

clutch

type

head

places

for

is in

1800 from

cam,

spring

The

shift

oper-

in

that

pu

Iley

creates

head

the

typ-

the

it.

to-

ro-

shift

22

Two

keybuttons,

can

be

used

bai

I

between

together

If

the

operator

case

position, a shift

shift

lock

by

depressing

be

released

The

right

shift

arm.

strap

from

shift

arm

{Fig.

62).

near

the

top

screw

on

FIGURE

one

to

actuate

the

regardless

desires

is

attached

the

by

depressing

hand

rotate

The arm

the

shi ft arm

to

minimize In

the

of

the

side

60.

at

two

keylevers

of

which

to

lock

to

shift

pulley

pivots

front

lower

arm rests

of

the

Shift

Cam

each

front

the

shift

causes

one

keep

the

is

provided

the

left

lock

keybutton.

and

releasing

is

fastened

to

right

to

the

pivot

to

rear

case

position,

against

powerframe.

and

Shift

corner

mechanism

both

is

depressed

mechanism in

for this

keylever

The

either

to

on

"a

acts

movement

an

the

head

Arm

of

the

keyboard,

(Fig.

of

them

by

the the

purpose.

and

may

shift

thE~

top

at

the

to

stabi

of

the

adjusting

of

a mounting

61).

A

to

move operator. upper

be

locked

lock may

keybutton.

of

the

bottom.

Ii

ze

pulley

screw

The

A

the

22.

1

IBM Selectric I/O Manual Of Instruction

Specifications and Main Features

Frequently Asked Questions

User Manual