July
4,
1950
|-————
—
— —
—
— — —
—
—
l-–—
— — — — —
—————————
J.
P.
VEATCH
APERIODIC
Filed
RADIO
Feb.
ETA
RECEIVER
14,
1947
2,513,384
ATTORNEY
Patented
July
4,
1950
2,513,384
UNITED STATES
APERIODIC
James
P.
|
The
invention
ufactured
of
the United
without
in
April
receiver
capable
through a large
mission
of
number
in
will
frequency
The
suspected
tively
receiver,
of
satisfactory
which
over a wide
radio
ously,
large
a
cation
out
quency
a
of
an
ing
following
the
matic
invention.
description
the
2.
Section
an
“push-pull'
indicator.
in section
unbalanced
duced
which
the
accordance
30,
This
It
Previous
One
Another
radio
Another
radio
A
In
1928
invention
and
of
is
desirable,
in a locality,
indicating
of
particular,
detect
required
strong.
in
radio-frequency
will
object of
receiver
to
radio
range
capable
through a large
the
necessity of
or
capable
types
of
further
aperiodic
to
keyed
Other
objects
accompanying
diagram
Referring
antenna,
comprises
3
audible
operation,
by
when
described
and
used
States
payment
with the
(Ch.
more
responding
frequency
transmission
methods.
have
radio,
and
type
receiver
area,
give
radio-frequency
attempts
which
because
accomplish the
range
capable
signals
of
frequencies.
object
of
group
object
of
radio
object
radio
continuous
will
specification
embodying
now
of
the
input
a
“push-pull”
is
an
local
frequency.
balanced,
a
and
thereby.
section-3
unbalanced
||
by
or
for
governmental.
to
us
provisions
460,
45
relates
particularly
to
in
monitoring
ito.
use a receiver
Law
need
of a radio
transmission
of
transmission
must,
an
indication
to
produce
sensitivity
amplifiers,
no
method
of
frequencies.
this
invention
of
transmitted
of
this
invention
responding
range
tuning
of
frequencies.
of
this
invention
responding
transmission.
of
this
receiver
wave
become
taken
drawing
to
the
drawing
invention,
circuit
oscillator
amplifier
signalis
supplied
The
is
also
passes
Veatch,
Application
(Granted
amended.
herein
for
of
any
Stat.
to
an
transmitted
range.
by
enforcement
field
required
responding.
of
to a particular
invention
capable
apparent
in
which
the
and
balanced
capable
Section.
received
to
section.
local
applied
under
may
the
Government
royalty
of
L.
467).
aperiodic
to a radio
all
radio
any
receiver
when
are
when
placed
when a rela
is
created.
such
an
was
sought
have
has
been
amplification
is
to
on
is
to
radio
frequencies.
is
to a wide
is
of
radio
signals."
connection
shows a Sche
principles
for a general.
section
detector.
of
4
and
and
frequency
to
on
the
Arlington,
Hoffert,
February
3 Claims.
the
April
be
man
purposes
thereon.
the
act
.
radio
receiver
signals
trans
capable
of a large
agencies,
which
the
time,
unknown.
in
aperiodic
by
not
been
found
provide
Simultane
any
of
to
provide
communi
With
fre
to
provide
variety
to
provide
respond
from
with
of
this
f:
includes:
Section
amplifier.
producing:
includes
an
output:
-
detected
2
which
pro
section
local
fre
PATENT
RADIO
Santa
30,
of
a
use
a
a
the
a
is
2.
RECEIVER,
Va.,
Ana,
Calif.
14,
1947,
Serial
(Cl.
250---8)
act
of
March
1928;
30
quency
and
indicated.
To
explain
tion
With
RFC2
teries
the
filament
battery
while
is
effectively
by
connections
to
filament
The
RFC
nected
G1
of
nected
battery
20
through
potentiometer.
B1.
".
The
nected
P1
is
25
C4
to
ground.
C4
is
The
direct
G2
of
30
in
balanced
filaments.
and
supplied
battery
grounded:
35
and
V3,
through
sistors
tween
respectively.
40
also
connected
First
through
negative
sistor
45
ground
Section
the
filament
leads
53
connected
the
center-tapped
The
other
the
plate
nected
5
center.
3.
sistor
of battery
to
ground:
Fs
is
OFFICE
and
William
No.
3,
O.
G.
to
Section 4 where
includes antenna. A connected
condenser
and
thence
B1,
B2,
B.
batteries
conductor
is
connected
in
parallel
tube
V1.
through
B2.
resistor
junction
to
ground
also
connected
connected
plate
current
tube
V2
F2
B3.
respectively,
resistor
RO-R)
the
plates
control
resistor
side
R6
and
through
3,
#2
to
through
end
P6
across
tap
R12,
and
B4.
through
connected
J.
728,431
1883,
as
757)
2
it
is
further
the
invention
C1,
to
B3,
and
F1
being
Batteries
B2
and
placed
through
F2
of
tube
between
with
Screen
resistor
Plate
R3,
R7
to
of
through
The
junction
to
screen
P1
of
tube
connection
of
section
push-pull
and
F3
with
current
One
Screen
side
R10
which
P3
The
junction
to
the
grid
G3
R6
of
battery
potentiometer
condenser
the
local
FG of
battery
B3.
primary
of
said
of
tube.
the
primary
of
which
switch
Said
condenSer
through
in
further
inductance
filament
B4
are
connected
B1
and
B4
Supply
between
leads
V2.
condenser
through
resistor
grid
R2
P1
of
rheostats
the
negative
rheostats
coils
F1
of
tube
connected
to
leads
B3
supply.
45
volts.
batteries
it2
from
C1
condenser
R1,
to
S1
to a central
tube
control
of
tube V is
W1
is
R4 º and
side
R4
and
condenser
through
being
grids
are
to
are
and
positive
and
oscillator,
which
condenser
V6.
is
center
condensers
of
condensers
grid
S1 of
W1
is
to
the
2.
Tube
relation
connected
through
of
filaments
S2
and
connected
the
junction of equal
connected
P3
of tubes
of
of
tube
potentiometer
B1.
The
C6.
tube
also
connected
first
control
V2
is
with
tube
leads
S3 of tubes
together
in
resistors
side
of
V3
is
junction
Ri
is
connected
includes
is
connected
The
grid
Gs
of
C12
to
of
primary
connected
SW1
resistor
transformer
is
Condenser.
of
to
tap
connected
transformer
through
the
positive
is
also
Cio.
Theºfilamentº
R13
detail,
RFC
battery
and
in
V2
battery
one
C11
to
amplified
sec
in
Series
and
Vi.
Bat
in
series,
it
from
1.5 volts,
Ground
B3
and
B4
B3
choke
C2,
con
grid
con
tap
connected
of
R5
C5.
on
R5,
and
battery
is
con
Plate
C3
and
C3
and
W1.
in
grid
connected
W3,
the
parallel
#2
F-F3
of
is
V2
and
re
series
be
and
V3,
Ro-Rois
B4.
connected
R7
to
the
of
re
to
tube
We
through
tube
V6
is
end
of
T.
to.
iscon
T1,
the
.
re
side
connected
grid:
.
G6,
The
secondary
through
M2
trol
through
the
W4
through
G5
and
Ca-Ca
Sistors
tion
nected
W4
tery
connected
condenser
and
Ms
grids
resistor
Plate
P2
two
equal
of
Section
the
of
tube
connected
connected
R11-R11
of
the
to
and
W5
B1.
Balancing
tance
and
third
harmonic
by
Section
Ca-Cais
Sistor
Spectively,
center-tapped
W4
of said
Side
V4
ter
Secondary
Speaker.
lected
across
lating
from
a
and
which
ance
A
antenna
ever,
A
must
and
response
with
RFC
pressed
tector
high
path
Somewhat
R9
in
The
plates
and
W5
primary
of
battery
and
V5,
tap
of
In
operation
by
antenna. A causing a voltage
inductances
condenser
entering
path
for
RFC2
is
high
for
all
wire
of
for
for
practical
be
the
space
versus
short
is
used
across
tube
inductance
to
high
inductance
quencies
Tube
input
forming
diode
amplification
duced
frequency
carrier.
“grid
ing
rectification
tube
a
negative
in
causes a reduction
and
across
-
across
on
V1, a pentode
capacity,
the
action
in
case
and
Resistor
leak
across
impedances
V2.
The
voltage
condenser
therefore a reduction
resistorS R3,
impedance
of
transformer
C13
of
tubes
M2
of
W5,
two
ground.
are
The
through
condensers
have a reactance
3.
order
are
are
respectively,
the
of
W
the
have a combined
frequencies
infinite
the
governed
antennas.
W1.
frequency
RFC1
the
of
of a
and
between
V2
and
M3
R8.
tube
W2
condensers
4.
other
connected
is
Plate
of
also
of
Section
together
in
Series
connected
equal
Filaments
junction
battery
C8-C3
of
the
The
reactance
less-than
to
maintain
P4
and
P5 of
connected
primary
connected
of
transformer
B4.
Screen
primary
transformer
radio-frequency
RFC1
to
prevent
the
receiver.
radio-frequency
compared
length
receiver
purposes
by
the
available.
frequency
Relatively
to
allow
the
acts
dual function
the
of
the
resultant
C2.
low
grid
Due
to
RFC2
is
provided
detector.
type
as a “grid
grid
the
direct
continuous
low
frequencies
R1
and
conden
Ser.”
RFC1
grid
to
build
This
in
the
R4
RCF1
3
2,513,884
T1
is
to
the
second
and
V3,
respectively.
are
connected
connected
Cg-C9
P3 of
tube
condensers
4.
through
and
in
condensers
series.
F4
through
of
resistors
B5
to
are
approximately
audio-frequency
of
the
good
tubes
to
either
of
transformer
through
T2
grids S4
are
connected
of
transformer
T2
is
and
RFC2.
any
C2,
however,
Series
to
the
in
the
required
would
described
the
expected
Marked
will
large
frequencies
G1
and
high
energy. A separate
and
and
filament
distributed
offers a low
to
impress
vacuum
leak
of
G1
current
rectification,
and
filament
current
unmodulated
condenser C2
A
voltage
and
RFC2
G1 and
up on
flow
grid
negative
plate
current
in
the
R5.
RCF2
connected
control
through
to
grid
Wa
is
Co-C9
Grids
also
C8-C3
and
leads
filament
of
equal
grids
Con
to
ground
one
G4
connected.
G4
condensers
through
The
F5
if
R11-R11
of
of
tube
to
grid
and
Gs
re
junc
is
con
of
tubes
to
bat
is
F4-F5.
capaci
at
the
supplied
the º condensers
resistance
balance.
W4
the
to the
and
connected
energy
direct
energy.
antenna,
of
re
and
Ws,
end
T2.
center
S5
to
C2
impedance
re
of
the
Plates
tap
positive
of
tubes
the
cen
T2.
The
to
a
is
col
to
appear
is
an
iso
potential
provides
RFC1
imped
range.
make
the
herein.
size
field
variations
be
experienced
best
How
of antenna.
strength
in
inductance
to
be
im
F1
of
de
capacity,
impedance
Small
high
fre
tube with
detector'
voltage
of a
low
per
by
F1,
and
pro
radio
modulated
provide a 6
appear
will
filament
grid
voltage
If
is
cause
F2
Will
G2
and
of
cause
store
voltage
of
tube
V1
drop
the
voltage.
reduced,
the
negative
over
proper
C3
duce
appearing
that
frequencies
10
are a combined
the
slightly
ment
equivalent
Selected
ceiver.
low
balance
with
20
ment
an
tube
Resistor R is a variable
tial
25
sitivity
adjustment.
control.
the
G3
30
G2.
for
sistor
condenser
In
35
and
ceive
triode
Gs
through
back
40
Resistor
floating.
as a
tion 3 from
45
other
the
trol
tor
resulting
source
50
biased.
With
of
tubes
applied
55
appear
through
and
applied
60
former
secondary
speaker.
varied
balance
tion
For
quency
moving
cillator
70
resistors
lected
The
graph
ated, a signal
75
tected
voltage
resistor
Resistor
operation
is a by-pass
the amplitude
an
appreciable
resultant
negative
point
input
Resistors
adjustment
the
respect
of
balance
audio
by-pass
V1.
adjustment
may
Resistor
circuit
to
operate
Resistor
screengrids
Rio
section
condenser
power
Ts
to
of
triode
condenser
to
produce
R13
Resistor
filter
on
R1.
R2
provides
condenser
on
the
plate
will
result.
series
plate
in
of
W2
grid
G3
signal,
of
system.
to
R5
may
of
be
controlled
Condenser
of
grid
under
R10
provides
S2
is
by-passed
C.7.
3,
the
C11
from
produce
V6
is
oscillation
prevents
to
prevent
spreading
circuits.
audio-tone
grids
R3
provides
to
equal
W.2
to
across
coupling
G5
of
to
T2
Condenser
produced
M2
and
M3
a
from
grids
path
the
M2
and
voltages
and
W3,
grids
G2
resistors
tubes
and
of
condensers
W4
grids
G4
no
current
transformer
However,
with
respect
of
the
will
reception
minimum
antenna
station
by
system
be
given
at
of
energy,
the
on by
R4
keyed
the
antenna,
closing
and
R5
signal,
is
then
of
sufficient
will
tube
be
V1
and
4.
grid
G1
will
tend
to
leak
". . . . .
the
of
Screen
of
attenuation
potential
relation
and
of
tube
R4
and
this
so
that
be
for
the
the
R6-simulates
G2
of
the
correct
grid S1 or
of
Sufficient
high frequency
of
tube
ResistorS
of
plate
to
of
equal
W3
with
impressed
R5
are
potential
Resistor
rough
made.
plate
resistor
bias
on
to
some
C6
is
the
tube
W2
same
proper
and
S3
of
tubes
for
audio-frequency
primary
act
as a
the
an
coupled
C12
to
the
R12
and
the
of
tank
filament-plate
audible
to
give
the
in
voltage
condenser
tone produced
through
C13
by
section
of
tubes
for
V2 - and
rectified
application
M3
which
applied
as
and
long
as
G3,
equal
to
equal
R-R-9
and
and
if
the
to
the
is
the
apparatus
A,
switch
until
connected.
C9-C9
W5.
With
G5
equal
will
be
T2
and
voltage
voltage
impaired
speaker.
unmodulated
is
turning
SW1
no
signal,
is
heard
intensity
collected
by
impressed
.
voltage
tube
size
V1
but
of
resistors
of
tube
the
potential
no
upon
variable
and
R4
is
and
voltage
not
So
modulation
R3,
R4
and
such
W1
will
negatiVe
to
signal,
the
to
therefore
made
fine
adjust
Condenser
return
tube
the
conditions
circuit
to
permitini
W3.
The
extent
by-pass
and
screen
V2
by
for
resistance
allows
as
voltage
and
W3.
transformer
circuit
and
circuit
tone.
The
the
tank
necessary
the
of
the
is
used
audio-current
of a strong
are
grids
and
equal
and
induced
impressed
on
on
and
balanced
the
and
oriuntil
at
the
If a radio
is
antenna.
on
circuit
tank
grid
feed
circuit.
G6
C10
are
by
battery
to
couple
3
to
the
V3.
Resis
audio
only
slightly
-.
M2
and
Voltages
voltages
be
applied
to
grids
Voltages
opposite
in
on
grid.
G2
grid
G3,
an
indica
. ? ."
radio-fre
by
audio-os
adjusting
a
speaker.
tele
then
oper
A
grid
G3
away
for
W1.
to
re
large
R5
that
be
filla
the
or
a
re
al
large
C5
is
of
sen
this
this
in
grid
grid
Re
by
T.
re
of
grid
from
used
Sec
to
con
M3
are
Will
G4
the
the
is
the
...
re
se
de
of
tube V2
justment
voltages
by
and
amplified
speaker.
the
with
radio
local
and
sitive
simply
using a separate
rectifier
direct
rent
sitivity
the
keyed,
being
will
the
oscillation
input
using a rectifying
input
ances
capacity
tenna,
tively
quencies.
collector
factor.
ceiver
be
it is
and
by
be
be
band
The
crease
detrimental
A
mine
signal
When
drawing a Visual
cathode
tion
signal
of
ceiver
receiving
could
quency.
a
within
Occur
least
charge
and
connected
through a capacitor
cathode
as
explained
for
balance
on
grids
G2
the
received
cause
tone
the
signals,
oscillator
adjust
position.
as
An
increase
signal
the
audible
in
section 4 and
If
the
will
audio-amplifiers.
transmitter
appear
keying.
it is
only
in
section
resistors
In
this
in
sensitivity
diode
and
allowing
current
amplifiers
to
input
amplifier.
may
the
limit
circuit.
It
unmodulated
received, a long
result
in
only
circuit
is
to
the
capacity
to
reduce
can
capacity
constant
As
wire
If
the
sensitivity
is
increased
heard
simultaneously.
possible to
therefore,
the
use
inserted
any
of
the
direct
after
detection
applied
receiver
and
by
the
be
kept
the
through a large
stated
will
generally
Sufficiently
reduce
the
of
suitable
ahead
of
usual
elimination,
addition
the
calibrated
the
and
using
In
place
of a Signal.
intensity
recording
to
of a simple
sensitivity
effects
of a collector
tuned
approximate
aid
in
locating
other
of
ray
permit
receiving
the
audio
indicator
tube
may
In
may
Systems
automatic
equipment
be
arranged
The
above
preferred
the
to
those
What
is
1.
claimed
In
combination
one
inductance
device
cathode
to
being
to
Specification
embodiment,
scope
of
Skilled
is:
having
electrodes,
One
Side
connected
above.
resulted
and
G3,
will
tone
and
disappear
For
reception
necessary
3
by
R4
and
case
rectifier
tube
Additional
be
added
set
by
the
will
be
radio-frequency
pulse
current
in
section
is
most
element
using
input
capacity.
low
in
response
previously,
of
an
the
number
filters.
the
input
forms,
or
simple
materially
circuit
frequency
reproducer
be
used
this
case
be
obtained.
may
unattended.
show
but
the
in
the
an
antenna,
coil, a first
at
least a plate,
said
of Said
shunted
to
5
2,518,884
As
the
original
in
equalizing
the
change
unbalance
from
section 3 to
reproduced
is
keyed,
in
accordance
of
to
opening
R5
Sections
may
W1
increasing
understood
of
and
readily
With
sectionalized
relation
be
efficient
Under
receiver
of
Such
tuned
can
the
Systems.
such
an
be
monitoring
intensity
and
many
appended
art.
the
turn
switch
for
the
2
be
obtained
replacing
to
act
purely as
direct
noise
generated
continuous
foWing
before
2.
An
obtained
extremely
If
to
will
remain
range
the
length
the
determining
aperiodic
many
signals
such
band
stations
Such
filters
circuit
as
band
resonant
circuit
by
reducing
of
finite
be
used
of
the
exact
shown
as
a meter
to
indicate
indication
Warious
used
With
The
against
drawing
modifications
claims
connected
electronic
control
control
grid
inductance
by a resistor,
other
side
ad
the
caused
the
circuit
be
by
the
obviously
modulated
off
the
SW1.
most
Sen
and 4 act
by
the
grid
a
Cur
the
Sen
in
that
When
energy
is
Wave
through
the
local
aperiodic
by
low
induct
this
input
the
an
rela
of
fre
of
the
re
Will
conditions
Width,
received,
may
and
may
paSS,
circuit.
Will
in
the
length.
to
deter
received
frequency
in
the
Or
recep
of
the
types
the
re
with
the
indicator
fre
describe
will
to at
dis
grid,
being
coil
said
of
said
inductance
charge
second
having
second
second
together,
tube
and
at
control
electric
the
discharge
plate
of
10
first
being
tential
discharge
potential
discharge
quency,
Second
charge
electric
position
frequency
unleSS
detector
detector
uum
said
grid of
connected
whereby
of
device,
means
grids
device,
discharge
in
radio
2.
An
antenna,
Connected
having
tubes
electrodes
electrodes
cillator
applying
trol
Vacuum
output
trode
35
plying
control
equal
trode
signal
40
a
and
and
grid-leak
said
an
Vacuum
and
directly
Vacuum
uum
Source
local
frequency
55
Second
and
position,
Vent
Second
80
file
Number
70
for
said
electrodes
tubes, a direct
of Said
of
one
an
electrode of said
to
that
of
Said
is
received
radio
signal
Second
produce
3.
An
antenna,
detector
input
amplifier
tube
an
output,
connected
tube,
tube
of
frequency,
Vacuum
Second
and
application
inputs.
The
following
of
this
UNITED
1,464,322
1,593,837
1,615,636
2,127,525
2,383,126
2,400,133
coil,
6
whereby
functions
third
electric
least a plate,
grid,
discharge
first
device
being
first
said
third
to
the
device
may
the
first
means
for
supplying
of Said
the
plates
device
an
output
does not
energy
connected
an
each
having
and
an
being
connected
producing a local
local
of
each
detector
of
Said
adjustable
existing
first
by
is
received
vacuum
an
output.
connected
having
being
connected
stage
comprising
each
having a first
the
to
the
first
being
potential, a device
to
connected
means
the
second
tubes,
Vacuum
SWitching
of
REFERENCES
references
patent:
STATES
Name
Kolster
Mathieu
Iaing
muir.
Marshall
Hollingsworth
Pray
said
first
as a grid
discharge
cathode,
the
cathode
device
grid of
Said
connected
electric
first
discharge
electric
an
adjustable
grid of
be
grid
for
discharge
the
adjusted
of
the
producing a local
said
Second
appear
is
output,
output
frequency
Vacuum
and
of
said
being
circuit
received
across
whereby
in
Said
by
to
said
first
first
and
electrode,
in
Opposition,
frequency,
to
of
said
connection
and
Vacuum
the
tubes,
steady
potential
Second
on
the
tube
said
antenna,
by
Said
tubes
become
first
to
an
input
third
Second
connected
an
first
first
antenna,
an
across
a
and
output
of
the
said
first
input
input
of
said
to
for
for
Supplying
input
Said
tubes
means
said
JAMES
WILLIAM
--------------
------------ July
----------
----------
of
outputs
being
connected
operable
local
frequency
P.
WEATCH.
(CITED
are
of
PATENTS
------
--------------
electric
leak
device
and
of
Said
being
second
directly
dis
detector,
first
first
connected
a
each
and
and
electric
to
the
device,
the
device
source
to
second
of
third
electric
the
normal
electric
po
fre
frequency
output
said
impedance,
impedance,
and
second
the
ineans
vacuum
when
whereby
impedance,
and
said
first
detector
an
generating
said
J.
HOFEERT.
record
Jan.
Mar.
Aug.
May
to
electric
antenna.
second
said
Second
and
between
control
to
control
the
dis
and
third
in
op
the
local
circuit
said
vac
control
output
an
os
means
for
con
second
the
elec
for
ap
the
first
tube
elec
no
radio
a
when
the
first
unbalanced
an
impedance,
and
second
of
said
second
adjustable
said
first
of
said
Date
Aug.
a
output,
second
input
being
first
vac
a
local
and
first
in
op
to
pre
to
said
in
the
7,
1923
27,
1926
25,
1927
19,
1940
21,
1945
14,
1946
Loading...