Argus C3, C4 Shutter Service Manuals

THE BUILT-IN

SHUTTER

The escopements

fit

to

problem

spoce. And

into the cromped

in the design of ony

in most

the shutter mechonism

lens mount.

ingenuityof thedesigners

The

ond

troins

other

housing. Even the

for exomple

toke best

other shutters follow this circulor

--

odvontoge of the existing

for complete shutter

movement.

So ihe ports in the modulor

smqll in orderto
precision

ond the shutter occurocy is

--

you hove

of the shutters exomined in

fits

poris thot ore

moin

moy be

o ringwhich

operotion with o very minimum

fit the ovoiloble spoce.

fine croftsmonship os well os

NOTE:

ond the Prontor

Shutters such os the

SVS

thot is, shutters mode byo

used on

be

controst to the modulor

In

comeros of mony different

studied so forore cleverly

quorters oround the lens. A complox

shutter

into o housing

curved to follow the

lever

--

shutters you've

good

qre

exomples

single monufociurer

shutter, the

is integrolwiththecomero itself --

porticulor

extremely
ond

suchos the focol-plone

comero in

simple

Brownie

Reflex comeros. Or, they moy be

which it is used.

such os you studied in the Kodok lnstomotic

--

shutters youwill

designcd

proper

is

of ovoiloblc

use

previous

which olso serves

hos produced

lorger models of the Compur,

in

fits oround the lens

escopement

shope of the

borrel

spoce. Moin levers in mony

pottern,

ond

usuolly

omount of

studied

Smoll ports require

frequently the

design.

Synchro-Compur

of modulor

result of

00-MXV

shutters

which moy

mokes.

BUILT-lN

ond, os such, is unique

Built-in

shutters moy

quite

exomine

in

SHUTTER

complex

future lessons.

lessons,

os the

geor

provide

must be

high

--

to the

be

--

i

io

The built-in

spoce

within
to the circulor confines
porotively lorge, rugged,

shutter tokes odvonioge

the comero body.

oround the lens,

ond simple.

smoll ond precise while the
pocket-size

ln

built-in

moy be locoted

elements

mechonisms

proporiions.

this lesson,

leof-type

--

shuiter. And you'll

even though

ore spreod

you will exomine three voriotions

either behind

the

out

behind

2

of the lorge omount

Since the

ports

they con

the

Or,

comero itself is

see how the shutfer blodes

the lensor between

shutter

blode driving

lens in the comero body.

the

ore not restricted

com-

mode

be

ports

scoled

moy

remoin

down

of the

the lens

timing

ond

of

io

The

using o built-in

o third

shutter mechonism.

thot

of the volume

is inexpensive

dependoble

Argus C-3

R ELEASE

BUTTON

RANGEF INDER

DISC

SETT

LEVER

FILM WIND

KNOB

behind-the-lensshutter.

three

--

one of the most

-

ING

C-3,

Argus

good exomple of

2,

Fig .

of

The

to monufocture,

foctors

o

is

the comero body

result of

the Argus design

which

populor 35mm comeros ever designed.

theArgusC-3,

ln

is used

to service, ond

eosy
contributed

o

35mm

comero

to house the

is o

to moking

olmost

shutter

quite

ihe

FIGURE

SPEED KNOB

2

*

RANGEF INDER

WINDOW

VIEWF INDER

WINDOW

The

3

Argus

releose

FIGURE

ever ond the

KNOB--operotes

ARGUS

FRONT

hos two controls in

C-3

button. One

o com to determine

C-3

PLATE

oddition

of these controls

omount of retord, Fig.3.

the

POSITIONS

to the

--the

setting

SPEED

3

R ELEASE

BUTTON

COUNTER

DIAL

F

ILM

WIND

KNOB

FIGURE 4

The

other

releose

control

buiton

permits

from

operotion

"bulb"

(instontoneous)to

"l"

--

"B"

iust

(bulb),

turn the

Fig. 4.

1

knurled

Notice

colibrotions 4 rhrough 8. The

colled the

method

Argus C-3 modeIs ore colibrofed in the conventionol

o second.

fol

lowing

REMOVING

The

vory only

setscrew.

o

by

lever in o counterclockwise

But

models

locoted immedioiely under

setting lever in ploce.

os you'llsee

the setting lever counterclockwise to cock the shutter

nut ond the setting lever

iom

thot the speed

"Motchmoticr"

or colibroting the shuiter speeds ond the

The numberson the Motchmqtic

shutter

front

slightly.

speeds:

FRONT PLATE

THE

plote

ossemblies of the

ln the older models, the

Just

knob, Fig. 3,

porticulor

o nome which refers to

l/300 second

8

--

7

--

6

--

5

--

4

--

loosen the setscrew ond

1/125

l/60

l/30

1/10

second
second
second

second.

IN THE

direction.

the setting lever setscrew

suchqs the comero

--

o

in

moment)

illustroted. lnsteod,

the setting

setting lever post

The

hos o left-hond threod. So

rightly ogoinst one onother

more

contoins the number

Argus C-3 illusiroted is

f/stops.

speed knob refer to the

ARGUS

vorious

is eliminoted

lever,

C-3

Argus

setting

C-3
lever is held

unscrew

in the loter

o

JAM NUT

Fig.

5

(on

--

the moin lever,

the

unique

Other

frocfions of

comeros

the setting

--

holds the

moving

the

binds

4

JAM NUT

';-"-.

,ut"

,w

*J

FIGURE

ond turn the

--

Then, unscrew

clockwise

off the

'

the

the leotherette

5

the newer-style

Hold

iom

nut

setting lever stof ionory wif h your f

counterclockwise

you ore now moving the

the setting lever

direction

nut in the

iom

CAUTION: Do

the

during

ploce on the

in

speed

knob

colibrotion

visible

exposed

movement

side of the speed

lose
com. You con, however,

in

front

the timing

f

igures

Five or

plote

--

screw. The

six

--ond,

some

remove the Argus C-3 speed knob

not

froni plote

isossembly

d

front plote.

retoining

plote.

screw

But

ond there's olwoys o temptotion
of the retord

knob.

between

7 ond

8.

screws

to the comero body. These

covering the

(the

iom

ofter removing

direction.

in other models,

speed

section

So

the

see

numberdepending

front plote,

in figure 3. So corefully lift the

of the front

or

shorply creosing the

plote with your

leotherette.

bench

with

o thin-heoded wrench

owoy from the setting lever.

nut

from

is covered by

post

its

the

--

the Motchmotic,

ln

by turning it in o

setting

the

speed

knob

the cemented

lever,

remo ins

the screw is

to remove on

com

by

speed

the

which

--

is ottoched to the

--

removing the screw, you

knob

properspeed

os indicoted by

leotherette ot the

knife

controls the

ond

ihe speed

com

on the model) reioin

screws ore underneoth

four

iry

ovoid

to

--

ingers

turn

the

bock

timing

the orrows

corners

teoring

5

Another screw

plote

some

window.

moving the leotherette

or cut the leotherette os indicoted by
Moke your cut very corefully

knife

olmosf

be

indicoted

--os

models,

You

when you

--

undetectoble.

there

con reoch the lower

locoted ot the bottom

is

the doshed

by

o sixth screw odiocenf

is

--either

loter recement

orrow in

screw without completely

lift the bottomof

with

the

the

3.

the fronl

And, in

center of

figure

to the rongefinder

the leotherette

the

doshed

shorp point of your

leotherette,

orrow, Fig. 3.

the cut

re-

bench

will

sixth

the

lf

the rongefinder

by

heoded

the

FOLLOWER which

FIGURE

screwswhich

front plote

FRONT'

PLATE

SCREW

retoining screw is used,

6

CAUTION: The

you've removed

once

lens to

prevent

covity to the right of

you con cut the leotherette

window,

hold the frontplote. Then, corefully

--

remoins

front

loss

Fig. 6. Remove oll of the

be coreful

wiih the

lens

the front

or

domoge --the

the rongefinder ossembly,

youdon'tdropouttheCAM

front plote, Fig. 7.

for

theeyepiece

plote.

lf

lens sits in the

so,

moy

lift out

be

round

Fig.

flot-

lift off

loose

the

10.

Figure 7 shows the inside of

see

follower fits into the

hond corner of the comero

of the

olso

speed

the

linkoge

pointed

com

between

out in

ond the com follower. The

hole

the speed com ond the

figure 9.

6

the

in

body,

the.front

BELL CRANK

plote--here, you con

(in

Fig. 9). The bell

speedsescopement,

pin

the lower right-

the com

on

cronk is

port

J

CAM

SPEED

CAM

FOLLOWER

PIN ON

CAM

FOLLOWER

,$

FIGURE

FIGURE

7

SHUTTER SET

8

SHUTTER

SET

TO

TO

l/300

l/10

SECOND

SECOND

("8"

ON

i$rylr

("4"

ON

MATCHMATTC)

MATCHMATIC)

You'll

position when the comero is

second), Fig.7.

when the

notice thot

And the com

shutter

is

set to the

Fig. 8.

thecomfol lower is otits highest

set to thefostest shutterspeed

fol

lower is ot its

slowest shutterspeed

lowest position

(lrll0second),

(l/300

OPERATION OF THE ARGUS C-3

SHUTTER

The moin lever in the

SHUTTLECOCK ond o lons

The

SHUTTLECOCK RIBBON

tension-type

MAINSPRING

SHI.JTTLECOCK

SHUTTLECOCK

RIBBON

mo inspring.

MAIN LEVER

ESCAPEMENT

CRANK

BELL

FIGURE'

To cock

wise direction

moin lever is then

of the RELEASE

FRONT LENS

EYEPIECE

THIS CAVITY

the shutter, rotote the moin lever in

your finger

with

lotched in the

PLUNGER, Fis.

FOR

SITS

IN

--

Argus

C-3 is o multiple

phosphor

con

nect

.

os shown in

--

cocked

I l.

bronze

the moin

o counterclock-

figure

position

bythe

com, Fig. 9.

ribbon

--

the

levertothe

10.

The

lowerend

COCKING

ROTATION

FIGURE

1O

Depressing

the

to free the moin

from left to right.

8

releose

lever.

Now,

cousing the

pushes the reIeose

button

the moinspring

lever to rotote ino clockwise

moin

plungerdown

pulls the shuttlecock

CRANK

SPRING

END

RELEASE

PLUNGER

RETARD

WIRE

FIGURE

BELL

LOWER

OF

LEVER

LINK

11

SHUTTER COCKED

direction. The

contocts o lug on the

blodes

--

cleorly ofter

the

blode

blodes.

Since you've removed the front

the speed comond the com
fostest

speed

spring, Fig.

counterclockwise

Setting slower shutter

clockwise

down,

Notice

cronk fo the RETARD LEVER in the

holds the

the lobeot the bottomof

speeds, the bell

first

under iis own
the

the lobe

of the retord. lever

ond the

ln its

geor

pin

So

in

(on

(on

the

shuttlecock ossembly,

operoting ring to open the shutier

you'll

we remove the

operoting

blode

oble tosee the oction of theshuttlecockmore

be

shutter

ring, not yet visible, then closes the

follower--the shutternowdeliversthe

(lrl300

second). The

ll, holdsthebell cronkoll thewoy inthe

direction

direction

com follower in turn rototes the

figure ll

present position

geor

first

segmenf

cronk

segmenf

. The

spring

first

the

the moin

posifion

--

.

speeds pushes

speed com pushes

the

--

o long

thot

--

V\OO

(in

the speeds escopement)owoy from'

the

moin

pulls

the retord lever owoy

geor

first

tension,

geor

lever)

os simuloted in

segment)

during

of the bell cronk determines

ond the

retord

during

blode

plote

reoson

WIRE

speeds

second

lever.

segment then turns clockwise,

in the

is

the releose cycle.

lever decides

its releose trovel,

ossembly. A spring on

shutter

ond, olong with

--

thqt the

is

the

bell

the

com follower

bell

LINK connects

escopement.

the retord

--

os youselecf slower

But

figure 12

position

cronk

bell

cronk

in

cronk

the bell

lever

from the

now,

--

to intercept

position

the

how for the

it,

o

.

9

LOWER

LOBE

ON

MAIN

LEVER

PIN ON

F IRST GEAR

SEGMENT

FIGURE

first

the first geor segment
contoct
the slower the

on odiustmentpoint

ter

12

geor

segment rototes in o clockwise direction. The

clockwise, the longer it remoins

moves

with the moin lever lobe during

resulting shutter speed.

pivots

The bell

cronk

onon eccentric

fortheshutter speeds.

speeds

replocing the fronf plote

ofter

the releose cycle

beoring

You'll

--

which provides

odiust the

o hole through

front plote ollows you to reoch the eccentric beoring,

see o little loter.

see

con

You

onything exomined in

thot the ArgusC-3

previous sysfems.

of the whole design is the time

othershutters werve

ln

speeds escopement slows

then holds the

in theArgus

Yet

os the

iust

the blode-opening
slowly the

The

shutterspeed

blodes

blodesstort
blodes

position

is criticol

inodiusting theescopemenf

escopement hos o sliding

screws

to odiust

you should

shown in f igure I3,

position.

its

note:

discussed,

down

fully

open

C-3, the moin

toopen. So the retord is

time

--the

open.

pin

of the

on the firstgeorsegmentot

coreful

--

during

odIustment

you con slide

Referring

retord system is

the most unusuol

But

ot

the blodesopen

theretord is introduced.

which

the moin lever

for the required length of time.

leverstrikes thefirst

slower the shutter speed, the more

observotion now will help you

reossembly.

ofter loosening

--

complete

the

figure

to

13, here's the timing

quite

fully

the escopement

--

geor

introducedduring

is, thespeeds

Thot

foriher

in

ond

--

shut-

the

os

you'll

unlike

port

before

the

segment

theslowest

the two

escopement

10

With the

the moin

ond

moin

the

segment

the moin

first

the

SPEEDS

ESCAPEMENT

SCREWS

ON

PIN

F IRSI

GEAR

SEGMENI

first

lever

but,

--

lever

geor

geor

segment

of the

the cocked

some time, comPlete

possible

lever in

should contoct

must be

segment.

a

in the

uo-

slowest-speed

position, the lobe

pin on the

the

without

interference

position

geor

first

rototion

from

on

"t

,,

'(-

,f

r

FIGURE

"B"

Turning

the

shutier, the blqdesopen

FrcuRE

13

obtoin

To

colibrotion

releose button

the

poiition

shown in

END

RELEASE

PLUNGER

14

"bulb"

oligns wiih

OF

SHUTTER

oction,

the index

to "B"

figure

to the

COCKED,

rotote

rototes

14.

Now,

full-open

SET TO

releose button

the

dot on

releose

the

when

position

"BULB"

until its

the comero body.

plunger to

you re.leo-se

--butthe

the

flotted

11

end of the releose

15.

Fig;

shuttlecock

When

the
shuttlecock

Consequently, the moin lever

hos

you let

moin lever--so

RELFA

PLUNGER

BLOCKS

MAIN

LEVER

up on the releose

moves

5E

HERE

plunger

moved

cotches the

for

enough for

button, the releose pIunger frees

the mqin levercompletes

post

the lug

on the

upper lug

is

shutter

the

operoting

blode

on the moin lever,

orrested

before

blodes to close.

its rotoiion ond

ring.

the

the

FIGURE

DISASSEMBLY

screws

you

Lngoged

FIGURE

15 SHUTTER HELD

Remove

shown in

see the

con

the

by

SHUTTER

BLADE

ASSEMBLY

RETAINING

SCREWS

16

t2

OF THE

the

ARGUS

shutter blode

16. Now,

figure

spring-looded

shuttleiockossembly

C-3

ON

SHUTTER

OPEN

ossembly

on ihe bock

blode

to open

"BULB"

toking

by

operoting

the blodes,

out

of the

ring

the three

ossembly,

thot

lug

Fig.17

is

'

BLADE

OPERATING

RING

SPRING

BLADE

OPERATING

RING

LUG

FIGURE

During

SHUTTLECOCK LATCH, Fig.

blode

cock lotch engoges

17

shuttlecock is olso

The

the cocking cycle,

operoting ring lug

cleorly

the pivoting oction of the spring-looded

--but

the lug

position.

SHUTTLECOCK

SHUTTLECOCK

FIGURE

LATCH

18

visible

18, ollows the

ot this time, Fig.

to

lotch

byposs

on fhe releose cycle, the shuttle-

ond

drives

the

blodes

to the open

18.

the

13

Now, disconnect

the two

escopement.

screws shown in figure

the wire link

l9

from the retord lever.

Iift out the entire

ond

Remove

speeds

Disconneci

the two tension springs

ond the moinspring--from

Remove the mqin

post,

Fig.

SPRING

HOOKING

POST

RELEASE

PLUNGER

PIN SCREW

RANGEFINDER

leverby toking out

19.

MAIN LEVER

SCREW

SPEEDS

ESCAPEMENT

RETAINING

SCREWS

RELEASE

PLUNGER

E NT

DET

SETSCREW

post on the comero

the

the screw

the

--

through its

bell

body,

cronk

Fig.

threoded

spring

19.

FIGURE 20

14

remove

To

end ofthe

the

ond o boll detent
on the

either

moved

cqn

rototing

the

determines

now remove

the

comero body,

portof

or

"l"

covity.

releose

remoin inside

plunger,

the releose

the

f he

the

position;

"B"

omount of

ond the boll

spring

first toke

20

Fig.

--butbe

covity.

the

plungerossembly,

ond

spring tension

out the

coreful:

The boll

the setscrew

deteni

on

the

from

setscrew

o spring

detent

octs

holding it

iust

re-

You

you

detent.

the setscrew

ot

in

Remove

I9, ond lift

complete unit

As we mentioned

beoring.

screwr-olso

eccentric beoring

cronk,

bell

lifi out

the bross

out the

which does

eccentric

The

seen in figure

remove

bell

cronk

the

ond

the

ihe eccentric beoring

BELL

CRANK

ECCENTRIC

BEARING

CRANK

BELL

RETAINING

SCREW

You

21

rorely

will

hove

iust

ond odiustment

done --

FIGURE

thqn we

disossembly

figure I9,'is covered

rongefinder

ot this

time.

pin

releose

not

eorlier,

beoring

ot the

screw

plunger. The

require

the

bell

pointed

is

21, boih

further disossembly.

cronk

holds

retoins the bell

screw ond the

ond the wire

reossembly

on

hove to disossemble

ot leost

of

loter lesson

in o

link

to time

to service

the rongefinder,

front of

cronk. To

the comerq,

releose

pivots on

out in

odiustment

the

plunger is

on eccentric

figure 21

toke out

eccentric beoring.

--

the shutter

speeds.

hove to odiust

you'll

.

comero

the

ovoid disturbing

--

ony

shutter. The

the

pointed out

Fig.

the

i

of the

the

Now,

.

furth.er

.in

the

o

REASSEMBLY OF THE

Reploce the bell

seot the eccentric beoring

Then,

ARGUS C-3

qnd

cronk

ond

SHUTTER

the wire

reploce the

link os one

retoining screw

ossembly.

l5