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Патент USA US2411441

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Nov. 19, 1946.
E. R. LEROY ET Al.
2,411,441
TELEGRAPH RÉCEIVING DISTRIBUTOR SYSTEM
Filed July 28, 1944
2 Sheets-Sheet l
h.
1+
E. R. LE ROY
ç. L. BUSH
ATTOR NEY
NOV. 19, 1946.
E, R, LEROY ET AL
2,411,441
TELEGRAPH RECEIVING DISTRIBUTOR SYSTEM
BY
7%
ATTORNEY
Patented Nov. 19, A»1946
2,411,441
UNITED STATES PATENT OFFICE
2,411,441
TELEGRAPH RECEIVING DISTRIBUTOR
SYSTEM
Everett R. Leroy, New York, and George L. Bush,
Flushing, N. Y., `assignors to The Teleregister
Corporation, New York, N. Y., a corporation of
Delaware
Application July 28, 1944, Serial No. 547,001
15 Claims.
l
(Cl. 1718-531)
2
This invention relates to a telegraph system in
which the message characters are transmitted by
means of permuted marking and spacing pulses
separated by intervals, and more particularly to
improved distributor apparatus for applying such`
signals in proper order to a receiving device.
In telegraph communication systems for certain
types of services, it is highly important that the
ceiving distributor system in which the disad
vantages of both the rotary type Vdistributor and
relay type distributor heretofore proposed are
obviated, and in which the signals are properly
received regardless of any variation in the rate
at which they are transmitted.` .»
Another object of the invention is an improved
telegraph system in which the message charac
receiving equipment be compact and light in
ters may be transmitted at a high rate of speed
weight, 'and such equipment should not require 10 by means of marking and spacing pulses sep
the use of rotary receiving distributors for apply
arated by slight intervals or no-current condi
ing the received signals to a recorder or other
tions, and in which the speed at which such sig
receiving device. ' For example, in radio corn
nals may be transmitted is not reduced by any.
munication between airports and airplanes the ‘ appreciable time lag in the receiving relay dis
matter of size, weight and simplicity of the re 15 tributor apparatus.
‘
ceiving apparatus required in the planes is of
Any additional object is a receiving' distributor
great importance. In telegraph printer dis
apparatus in which no rotating parts are re'
tributor systems in which rotatable distributors
quired and in which synchronization of the`receiv-`
are required, this means that distributor driving
ing apparatus with respect to the transmittingmotors must be provided in the aircraft, together 20 apparatus need be eiiected only at infrequent
with a Special source of power therefor, such that
the motors will run at a constant speed substan
intervals.
‘
\
`
.
Still another object of the invention is a re-`
ceiving distributor in which circuits for the re
ception of a succeeding signal pulse are prepared
tially in synchronism with the incoming signals,
and furthermore means must be provided for
synchronizing and orienting such distributor ap 25 simultaneously with the reception of an imme
paratus with respect to the received signals. If
diately preceding or instant signal pulse, for dis
relay distributors of the type heretofore known
tributing the pulses to the proper elements ofV
were‘employed in- lieu of rotary distributors for
the receiving device.
receiving the incoming signals, such distributors
A further object is a receiving distributor in
would necessarily have groups of counting chain 30 which the time lag inthe distributor transfer
relays and the disadvantage that for the reception
relay circuits is reduced so that it is practically
of each character signal pulse there is required
the operate time of the counting circuit plus the
These and other objects of.--the invention will
operate time of the switching circuit plus the
be apparent from the following detailed descrip
length of the pulse received, and thus such dis
tion, taken in connection with the accompany
tributors would reduce the rate at which incom
ing drawings of two embodiments thereof, in
ing signals mal7 be received.
which:
1
In accordance with the instant invention a re
Fig. l illustrates transmitting and receiving
ceiving distributor system is provided in which
distributor apparatus, adapted for line wire trans
the switching circuit `for distributing the signal 40 mission, constructed in accordance with the prin-`
pulses is immediately set in motion to prepare
ciples of the instant invention;
p
for the reception of the next signal pulse and the
Fig. 2 illustrates diagrammatically a radio
registration of the instant signal pulse on the
transmitting and receiving system embodying the
storage equipment is started at the same time,
principles of the invention, the figure showing
these two operations commencing substantially
receiving apparatus adapted to be employed with
simultaneously. An extremely short interval only
the receiving circuit of 'Fig~ l with certain modi-`
is required after the termination of each pulse to
ñcations‘therein; and `
‘Y
allow the receiving circuit to release before the
Fig. 3 shows one of the modiiications required
next signal pulse can be received, since the cir
in the circuit of Fig. 1 to adapt the receiving
cuit for receiving the succeeding signal pulse is
circuit for radio reception.
l
‘
prepared at the time that the instant pulse is
Referring now to Fig. 1 of` the drawings, ‘theA
being received, while at the same time there is
upper portion thereof shows transmitting appa
no ypossibility of `two signals being registered for
ratus which, in the embodiment illustrated, em
negligible.
a_ single pulse received. .
H
`
One of the objects of the invention is a re
55
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`
‘.
.
.
`
'
'
ploys a tape transmitter TT, having transmitting
contacts C which operate between marking con
¿411,441
3S
tacts M and spacing contacts S in known manner,
depending upon the perforations in the tape, to
transmit permutation code marking and spacing
pulses. The marking contacts M are shown connected to a source of negative battery 1, and the
spacing contacts S are connected to a source of
positive battery 6, whereby the spacing pulses are
positive in polarity and the marking pulses are
negative in polarity, although it will be under
4
mitter brush to come to rest on the stop seg
ment S until the contacts are reclosed by con
tinued rotation of the cam I5. In the form dis
closed the transmitting distributor has ñve char
acter transmitting segments for the transmission
of a five-unit permutation code, although it will
be understood that any other suitable'code may
be employed, for example, a six-unit code, in
which case the number of segments will vary cor
stood that the polarity of these pulses may be re. c.. :1Y respondingly.
The receiving distributor shown in Fig. 1 pref
versed if desired. The tape transmitter may be
erably is an electronic distributor in which the
of any suitable type known in the art, for eX
ample, as illustrated in the Benjamin Patent
No. 1,298,440, issued March 25, 1919. `From the
transmitting tongues or contacts C of `the `tape
transmitter the polar marking and spacing
pulses are applied to ñve transmitting segments
of the segmented ring I0 of a transmitting dis
tributor TD, the transmitting segments being sep- ‘
arated by blank segments I2.
This distributor
is of the type employing a rotatable brush B which
is controlled by a start magnet SM in known man
receiving end vof the line L has two line relays
I9 and 20,A relay I9 being a non-polar type which
, operates on each marking and spacing signal and
'which controls theY timing of the receiving circuit,
whereas relay 2û4is a polar relay that is biased in
any suitable manner, as by a spring I8, so that
its armature tends to remain in the spacing posi
tion shown. The relay armature is actuated to its
lower or Vmarking position whenever a marking
signal is received. The polar relay 2i causes the
marking pulses received to be stored on pickup ’re
ner, the signals applied to the segments of ring
lays PUI to PUE on which the intelligence code
I0 being transmitted as brush B revolves, through
the brush to the solid transmitting ring II and 25 elements are temporarily stored, the energized
ones of the pickup relays representing marking
thence over the telegraph line L. If desired, a
combined tape transmitter and distributor em
bodying the foregoing elements may be employed,
various of which are known in the art, and one
code elements and the deenergized ones of these
relays representing the spacing code elements.
The control circuit comprises switching relays 3|
of which is disclosed in the patent to Potts No. anv to 35 and associated grid-controlled gas-filled rec
tiiiers 4I to 46, which preferably are thyratron
tubes, one switching relay and one rectifier being
employed for each unit of the code received and
for the stop or rest pulse.
‘
i
ments I2 to provide an open or 11o-marking condi
Relay I9 has an upper inner grounded arma
tion which inserts short intervals between suc'
ture 2i and an upper outer armature 22. The
cessive marking and spacing pulses. The opera
inner armature controls the circuit of a slow
tion of the distributor TD and also of the tape
acting relay 25, `the winding of which is con
transmitter TT may be controlled in known man
nected to a source of positive battery 26, the cir
ner, as by a tight tape switch TTS, which con
trols the circuit of the distributor start magnet 40 cuit being completed to the grounded armature
ZI 'when relay I9V is energized. Armature 22 of
SM. Theçtight tape switch is` controlled by a.
relay Ziihas a grounded condenser 23 connected
loop of perforated tape T which is fed through the
thereto, and controls two circuits, as follows:
transmitter TT in known manner, the tape issu
When relay I9 is deenergized, the armature 22
ing either directly from a periorator or a stor
closes' a` circuit comprising a resistance 24 and
age supply of tape which is perforated in per
the condenser 23 in series in order to discharge
mutation code in accordance with the messages
the condenser when the relay is in its released
to be transmitted.
.
.
position. When relay IS is energized, its arma
A source of negative battery I3 normally is
ture i12 closes a circuit from grounded condenser
connected, by means of contact elements I4, to the
23 to a conductor 21 for the purpose of preparing
rest or stop segment S of the distributor, so that
»therespective transfer circuits for operation as
a marking signal normally is applied to the line
the-signal pulses are received. The relay 25 has
L when the transmitter is at rest. Battery I3y also
an armature and make contact 23 which controls
is applied, through switch contacts I5, andthe
-the supply of current from the source 26 to a
contacts of the tight tape switch TTS to the start
conductor 2-9 that is common to the windings of'
magnet SM whenever there is a suiiicient length of
the various transfer relays 3l to 36.
f
tape `t in the loop of the tight tape switch. It will
Each of the ñrst ñve transfer relays 3| to 35
be understood that when the loop of tape is-suf
hasv yan upper armature and break contact 4U, a
ñciently » large,v the tight tape switch contacts
lower inner armature 31 which operates betweeny
will be closed andthe start magnet SM ener
gized to release the distributor brush B for rota 60 break and make contacts, and a lower outer
2,057,111, issued October 13, 1936, except that the
segmented ring of the transmitting distributor
is modified by the interposition of the blank seg
tion.
«
armature 38 which also operates between break v
The switch elements I4 and I5y also are con
, trolled by a synchronizing cam I6 which is driven
and make contacts. The sixth transfer'relay 36
from a motor I1 at a predetermined rate of Speed
such that the high point of cam It will momen
tarily open contacts I4 and I5 at predetermined>
time intervals for synchronizing the transmitting
'and Vreceiving apparatus in a manner hereinafter,
described. The motor I1 preferably is the same
like the preceding relays 3l to 35, but its lower
also has an upper armature and break contact 40
armature structure is VdiiTerent Vin that-it hasv a`
- grounded armature 39 and break contact which
control a release circuit for the relays PUI rto
PUíi, The armatures 31 vof the relays 3|' to 35
are connected in chain circuit relation with each
motor that drives the distributor brush B, r.and 70 other by means of conductorsv k5I to >54, and the’
the camV I6 may be so geared that the contacts le
armatures 38 of relays 3| ltoi-35 are connected in
and I5 will be opened momentarly after transmis
chain circuit relation with each'other'by> means’
sion of any desired' number of characters, for ex
ample, after a hundred'characters, .the momen#
tary opening of these contacts causing the trans
of conductors 64 to 61. ,Each of i the grid-l
controlled gas-filled rectiñers IllA to 46 lhas a bias
ing potentiometer or voltage divider 48 which
5
2,41 134.41A
6.
normally 'causes suiiicientV negative potential to
condenser 23 `becomes charged, which is of the:
order of 2 milliseconds in time, but once the tube
fires it remains in‘this condition until its plate"
bemaintained on'the grids of the tubes so as
to ‘î'block'the tubes and prevent them from firing
until the negative charges on the grids are re
circuit is open.
'
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duced during the operation of the system, as
hereinafter described, to cause successive iiring of
the tubes.
The operation of polar relay 23 to its marking
position connects the grounded condenser 6I
through armature 60 to conductor 63, this circuitY
>When .the transmitting distributor apparatus
continuing through the lower outer armature 38
is at rest and the distributor brush B is in the
and break contact of relay 35, conductor 64, ar
position shown, negative marking battery is ap 10 mature 38 and break contact of relay 34, con-f
plied from the source I3, through switch ele
ductor 65, armature and break contact of 38 of
ments I 4, rest segment S, brush B, transmitting
relay 33, conductor 66, armature 38 and break
ringII and line L to the winding of non-polar
contact of relay32, conductor 61, armature 38
relay I9, and thence through the Winding of polar
and break contact of relay 3|, conductor 9|, and
relayxZI! to ground. Relay |9, therefore, remains 15 through the operating winding of relay PUI to
operated, and polar relay 20 also remains oper
negative battery, thereby operating relay PUI by
ated'jßov its marking position so that its arma
reason of the charging current for the condenser
ture 6U rests against its lower contact. Since
6I passing through its Winding, The lower inner
relay I9 is operated, its armatures ¿I- and 22 are
armatures 83 of the relays- PUI to PU5 and 86 of
energized. Armature 2| and its make Contact 20 PU‘â are “preliminary make” armatures which'`
holds relay 25 operated and thus positive battery
engage their associated contacts, when these re
is applied through its armature and make contact
lays are energized, before the remaining arma-"
28 and conductor 29 to the energizing windings
tures ofthe relays engage their contacts. Ener-`
of relays 3| to- 36. Operated armature 22 of re
gization of relay PUI causes its preliminary `make
lay I9 maintains a circuit from the grounded
armature 83 to engage its make contact, thereby
condenser 23 through armature 22 and its make
locking the relay through conductor 84 and
contact, conductor 21 and thence through the
grounded armature 85 of relay PUG. Relay 3| '
chain circuit which comprises the lower inner
started to operate as soon as tube 4I ñred, but`
armatures 31 and break contact of transfer re
the preliminary make armature 83 of relay PUI
lays 3| to 35, the break contact of each of the 30 engaged its make contact before the armature
relays being connected to the armature 31 of
38 and break contact of relay 3| opened the en-l`
the immediately preceding relay of the group by
ergizing circuit of PUI.
means of conductors 5I, 52, 53 and 54. At arma
ture 31 and break contact 0f relay 3i the circuit
continues oyer a conductor 55 to the grid bias
circuit of the `first rectifier tube 4I.
of tube 4I, through upper armature 40 and break
. contact of relay 32, conductor 58, winding of re
lay 3I, conducto;` 29, armature 28 and make con
tact of operated relay 25 to positive battery`2S,
which is a source of plate battery for the Thyl‘a- l
When `the amount of tape inthe tape loop‘T
decreases sufficiently `so that the tight tape
switch contacts close, the start magnet SM will
be energized, thereby releasing the distributor
brush B `for rotation. As the brush leaves the
rest or stop segment S, it passes onto the first
dead segment I2, thereby momentarily applying
an interval or noi-current condition to the line
L. Relays I9 and 28 are, therefore, deenergized
and both release, although relay 25 remains ener
gized at this time, since it is of the slow-release
type. ».'I'he distributor brush then passes onto
the first code segment Iv of the distributor. As
suming, for example, that the first intelligence
character to be transmitted by the code segments
I to 5 of the transmitting distributor is the letter
“Af’ the code elements of which are marking,
marking, spacing, spacing, spacing, As brush B
contacts the ñrst code segment of ring I 0, a
The operating círcuit‘
for relay 3i is from the anode or plate circuit
tron tubes.
40
`
y
The distributor brush B next leaves segment I
of ring I8 and passes onto the second dead or__
blank segment I2 of the ring7 thereby again mo-`
mentarily opening the line circuit L, and relays
I9 and 28 release. The next code marking seg
ment 2 of distributor ring I8 has been marked
with negative battery from the tape transmitter
TT, and hence as the brush engages this segment
a negative marking pulse again is applied to line
L, and relays I9 and 28 reoperate. The operation
of relay I9 causes the grounded condenser 23 to:
be connected to the chain circuit which includesV
conductor 21 and the armatures 31 of‘relays 35,
34, 33 and 32; from armature 31 of relay 32 the
circuit Ycontinues through conductor 54, arma-`
ture 31 and upper make contact of operated relay
3| vand conductor 19 to the grid circuit of 'I‘hyra->
fore,- be transmitted over the line L. This causes
tron tube 42. In the same manner as in the firing
thereenergization of relays I9 and 20, the arma-»
of tube 4I , the condenser 23 applies a momentary`
ture 6I? of the latter relay being actuated to its
ground to the grid of tube 42 so that the nega
lower or marking position. The energization of 60 tive biasing potential thereon is reduced to a
>relay I9 causes the grounded condenser 23 to be
point such that the tube fires. The second stor
connected through armature 22 and its lower
age relay PU2 operates from the grounded con
contact to conductor 21, the circuit continuing
denser ßI in the same manner that the first Stor
through armature 31 and break contact of relay
age relayPUI operated, the circuit continuing
35,VY conductor 5|, armature 31 and break con
through the armature 69' and lower make contact
marking pulse of negative polarity will, there
tact >of relay 34, conductor52, armature‘31 and
break Acontact of relay 33, conductor 53, arma
of polar relay 28, conductor E3, armatures 38 and
lower break contacts of relays 35, 34, 33 and 32,
ture 31 and break contact of relay 32, vconductor
conductor 61, armature 33 and upper` make con
54, armature 31 andbreak contact of relay 3|,
tact of operated relay 3|, Aconductor 92 and op
and conductor 55 to the grid biasing circuit of 70 erating winding of PUZ to negative battery. The
the tube 4 | . This, in effect, puts an instantaneous
preliminary make armature 83 and contact of
ground on the grid of the tube, which reduces
PU2 causerelay PU2‘to lock -up prior to the op
the? negative grid bias formerly maintained on
eration of the second transfer relay 32, this relay
the tube to an extent such that the tube fires.
operating from the plate battery of the second
Thezìnstantaneous ground is removedas soon as 75 Thyratron tube A42. Operation of relay 32 opens,"
ain-1,4m
7
grounded condenser >6I to be connected through'
at flits' upper 'armature 4u and break contact, the
anode :circuit Afof the 'ñrst Thyratro'n tube 4 I ,caus
ingïthe >tube to become vextinguisl'led'and the ñrst
transfer relay 3I to become deenergized. The
,energization of relay 32 prepares, at its oper
ated armature 31 and ‘upper make contact, >a path
to the Vgrid circuit of the succeeding Thyratron
tube 43. Operation of the lower outer larmature
38 of relay 32 transfers the storage circuit from
relay PU2 to PU3 over conductor‘9'3.
As distributor brush B passes onto the next
dead segment after the second 'code segment, >re
lays I9 and 20 again are released. The third code
segment of distributor ring IIJ applies, when kbrush
B traverses the same, positive spacing battery to
the line L. This battery will voperate relay I9,
but relay 23 does not operate, since it is biased
conductor ‘63, armature' .38 and upper :make con
tact of operated relay 35, conductor ‘93 and the
operating winding of relay PUG, to 'negative bate.
tery. 'The latter relay 'operates' and locks »up
through its preliminary make 'armaturerßß >and
associated contact, conductor B1 and grounded
armature '39 and break contact of the sixth trans
fer -relay 36. The holding circuit of relay PUB
by spring I8 to its spacing position. Operation of
magnet or punch magnet PM of a printer or per
forator, as the case may be, whereby >such a
relay I9 lcauses the grounded condenser 23 to be
applied to the biasing circuit of Thyratron tube
43, thereby causing the tube to ñre. Transfer
relay 33 operates in the manner of the preceding
also flocks 'through conductor '82 and the oper
ated armatures 80 of relays PUI and PU2. The
operation of relay PUB transfers at its lower ar=
mature 85 and break contact, the ground 'from
conductor 84 'and transfers the ground through
its ‘make contact to a relay 99. This relay, when
operated, closes, >through its armature I001and
make contact, the operating circuit of a vprint
fio ' recorder will 'print the `character or perforate the
code elements thereof which were stored in >.re
lays `PUI to P115 and applied to the relays >or
magnets '91 of -the recorder.
Relay V33 operates through the upper armature
energized, since relay 23 did not operate to apply
the -grounded condenser 6I to the operating cir 25 43 and break Contact of relay 3l, conductors 18
and 19 and the plate circuit -'of tube 46. The
cuit of the relay; therefore, relay PU3, which
remains deenergized, represents a spacing ele
operation of relay 36 at its armature 40 opens
the plate circuit of tube 45 and extinguishes the
ment of the code pulses thus stored. Relay 33,
upon operating, transfers the circuit of condenser
tube and releases transfer relay 35, which re
23 to the grid circuit of the succeeding Thyratron 30 stores. The operation of relay 36 at its arma
tube 44 in a manner heretofore vdescribed and also
ture 33 also opens the locking circuit of relay
transfers the storage circuit to the relay PU4
PUâ, and PUG will restore.
Y relays 3| and 32, but storage relay PU3 is not
over conductor 94.
The various elements ofthe receiving distrib-'
f
As brush B of the 'distributor reaches the dead
utor are now in the same `condition as they were
segment immediately following the third code 35 at the beginning of the cycle of operations, that
segment, the line L is again opened and relay
is, tube 4G is »firing `and relays 'I9 and 2U are
I9 restores. Similarly, as the brush traverses
operated. If the character "A”> which- was just
code segments 4 and 5 to which spacing polarity
received and stored was the >last character of -a'.
has been applied, the transfer relays 34 and» 35
message, the distributor brush B would remain
and their >associated Thyratrons 44 and 45 suc 40 on ‘the rest segment S, and the relays and tubes'
cessively operate, and storage relays PU4 and
of the circuit would remain in the same condi
PU5 remain unoperated, thereby to store the spac
tion until a subsequent message is received. How
ing code elements therein.
ever, when a second character is transmitted im
At this time the code elements of the complete
mediately 'after' the ñrst character, the distrib
character, which in this case is the letter “A,”
utor brush B does not stop but continues through
have been set up on the storage relays PUI to
PUE. These relays may apply in any suitable
manner the code elements stored therein to a de
sired receiving device, for example, a tape per-v
forator or a telegraph printer of the multiplex
type. Such a type of recorder is indicated at
the bottom >of Fig. 1 by ñve selecting or trip latch
magnets 91, which devices may represent either
the selecting magnets of a telegraph printer or
the trip magnets of a perforator. The magnets
are selectively energized from battery through
their windings and thence through the lower ar
matures and make contacts 98 of the operated
ones of the storage relays PUI to PU5, therebyr
storing the five code elements of the signal in GO
the receiving device.
,
_
After leaving segment 5 of> ring Ill, the dis.
a second 'cycle of operation, in which case the
operation of transfer relay 3l opens the plate
circuit vof tube 45 and extinguishes the tube
and releases relay 35 which partially prepares a
locking path for relayV PUB.
Subsequent -char
acters of the message are received -in the same
manner.
It will be seen from the foregoing that the‘
receiving distributor described is adapted to re
ceive and distribute to the printer, perforator
or other receiving device the signals of the per
mutation'code at any rate that Athey may be
transmitted, and that the speed of operation of
the distributor elements at any time is deterà
mined solely by the speed at which the incom
ing signal pulses are receivedat such time, where-`
by the receiver is adapted to operate at any sig
tributor brush B traverses the last dead segment
of the ring and then engages the rest segment
S -of the ring. The latter causesV negative mark
nal speed either constant or variable. It is thus
ing battery again to be ,applied to line L, which
again operates relays I9 and 20. The operation
to the transmitting apparatus, and it is -not nec
of relay I9 causes the grounded condenser 23 to
be applied, through the armature 31 and upper
make contact of operated relay 35 and through
conductor 15, to the grid circuit of the sixth
except ¿at remote" intervals, although it` may be
Thyratron tube 46, reducing the negative poten
not necessaryv to maintain `a particular phase re-lation of the distributing apparatus with respect
essary to synchronize or phase the 'distributor
desirable to send a synchronizing signal as> a
precautionary' measure at certain intervals, say:
of 100 characters or20`0v characters. `Whenever
tial on the grid> of the tube to such value as
a synchronizing `signal is transmitted by the cam
I3, which vat this time momentarily opens the
to _cause the tube tov ñre. The operation of the
polar relay 20 to its marking position causes
contacts I4 _and I5, it removes the marking bat-‘
tery'irom the ‘stop'o‘r »rest segment S and de'en’er-~4`
:2,411,441
`~9`
.10
`-gizes the start magnet SM, and this causes the
>grounded condenser IIB, and the break contact
`release of relays I9 and 20 in the receiver and
also releases the slow-acting relay 25 so that
the source of battery 26 is disconnected from
the transfer relays and also from the plate cir
is connected to a grounded resistance IIT. “ The
cuits of the Thyratron tubes, whereby each of
these elements is restored to its unoperated con
dition. After the cam I6 has caused contacts I4
lower grounded armature ||5 and make contact
of relay IIO, and the grounded armature |23 and
make contact of relay |||, control the energizing
circuit of slow release relay I 2| . Relay I|z| also
has an upper armature |20 operating `between
break and make contacts. The armature iscon.
nected to a grounded condenser |21, and its 'break
and I5 to be reclosed, negative'marking battery
will again be applied to the line through the 10 contact is connected to grounded resistance |26.
rest segment S and will cause operation of re
The lower inner armature |22 operates between
lays |9 and 20. The operation of relay I9 will
break and make contacts; the armature is con
again connect the grounded condenser 23 to the
nected to a grounded condenser |30, and its 4break
grid circuit of the ñrst Thyratron tube 4I and
contact is connected to a grounded resistance I3 I .
imomentarily reduce the negative potential there 15
The make contacts associated with armature
on, but the tube will not fire Vat this time because
| I4 of relay || 0 and armature’ |20 of relay," III
slow-acting relayA 25 has not had time to oper
are connected by conductor 21, which extends
ate so as to apply the plate battery 26 to the
to Fig. 1, for controlling the operation 'of> the
Thyratron tubes. The instantaneous ground pro
Thyratrons 4| to 46 and thetransfer relays 3|
duced by the connection of condenser 23 to the
to 36. The make contact associated with arma'
ñrst Thyratron tube will not maintain the re
ture |22 of relay III is connected by conductor
duced negative potential _on the grid which again
E3, which extends to Fig. 1, for controlling the
operation of the storage or pickup relays PUI
assumes such a negative value as to prevent fir
to PUB.
`
'
.
4ing of the tube before the plate battery supply
for the tube is connected by the relay 25.
Slow release relay |2| has an-inner armature
|4| and a make contact whichyisconnected" by
Fig. 2 shows how the system may be employed
conductor 29, which extends to Fig. 1, for con'
with radio communication, and it is especially
trolling the application of positive battery from
-suited for transmission from an air port or other source 26h to the windings of the transfer relays
ground station or Fix to aircraft within thev con
trol area of such a station. `The receiving dis 30 3| to 34 and 33, an'dlthrough their windings-to
the plate circuits of the associated .Thyratrons
tributor circuit of Fig. 1, with certain modiñca
'Relay I2| also has an outer armature | 42 which
tions as hereinafter pointed out, is adapted to
isconnected to a grounded condenser |44„ and
distribute the radio signals generally in the same
generator for generating spacing and marking
associated with the armature is a `break contact
that isiconnected‘by conductor ‘I4 which extends
to the grid of tube 45 in Fig. 1. Armature`|42
also has a make contact which is connectedt
tone signals under the control of the tape trans
a grounded resistance |43.
manner as signals received from an incoming
-wire line. Referring to Fig. 2, there are shown
a spacing tone generator and a marking tone
`
When the distributor’of Fig. 1 is employed for
mitter TT2 and the transmitting distributor
TD2. The tongues or contact springs C of TT2 40 radio reception, the circuit shown in Fig. 3 is
are connected to ñve code segments `I to»5 of the
segmented ring I0 I, which are separated by blank
segments. In addition to the code segments, the
ring has a rest segment S, and a segment |03 for
timing and to provide a pulse for energizing the
punch solenoid of a perforator or the print mag
net of a printer in the receiving circuit. The
substituted for the circuit Contained within the
broken-line rectangle A of Fig. 1 so that positive
battery is connected to an inner armature |50
‘of the relay 35’ shown in Fig. 3„ instead of to
the winding of this relay as shown in Fig. 1.
Instead of having battery'applied by means of
` conductor 29, the winding of relay 35’ is perma
marking tone generator is connected by conduc
nently connected to .a source of positive battery
tor |02 to the segment |03, and also to the mark
26a. The armature |50 and make contact of
ing contacts M of the tape transmitter. The 50 the relay 35' connect the battery 26a to' the
spacing tone generator is connected to the spac
windings of relays 3| to- 34 and 3,6-in'thesame
ing contacts S of the tape transmitter. The
manner that armature |4| and its makeV contact,
_marking tone generator produces a. suitable fre'
Fig. 2, connects battery 2Gb to the` windings 'of
these relays.,
"
i
.
5
quency, for example, 1000 cycles, for modulating
the radio carrier when marking `signals are 55
The receiving distributor operates in response
transmitted and also when segment |03 trans
to spacing and marking radio signals applied to
mits a signal. The spacing tone generator pro
the distributor circuit by means of the relays I|0
"duces’a suitable frequency, for example, 1500 cy
and | I I, respectively, generally in the same man
cles, for modulating the radio carrier when spac
'ner as the line wire circuit of Fig. 1, with the
ing signals are transmitted; ` The modulating 60 following exceptions: Both the spacing and mark
frequencies applied to the segmented ring IOI are
ing relays ||0 and ||I control, through their ar
connected to the radio transmitter by means of
matures and make contacts ||4 and |20, the op
a rotary distributor brush B and the solid ring
eration of the Thyratrons 4I to 4B and transfer
|04 of TD2.
“
`
relays 3| to 36, whereas in the line wire circuit
l"At the receiving end the signals are detected, 65 only the non-polar relay I9 and its armature
`and audiofrequency signals pass from‘theradio
and Amake contact 22 control these relays. The
receiver, by means of a4 conductor |08, to an am
operation of relay ||| through its` armature |22
pliñer, and thence to audio *band pass- filters
.and make contact corresponds tothe operation of
-where the marking and spacing tone frequencies
the polar relay 20 of Fig. 1 in controlling the
are separated. ï The spacing toneifrequencies are'`
pickup relays PUI to PUB. Relay |2I, by means
rectified and applied to a relay H0, and the
marking tone frequencies ‘are‘rectiñed and ap
plied to a relay II I. Relay | ill has an upper ar
mature >| I4 operating between break and make
of. its armature I 4| and make contact, holds
positive battery on the windings of the transfer
’.gcontacts.
-The . armature .is
connectedv `ato
a
relays 3| to 35> in the same manner that the ar
mature 28 and make contact of relay 25 hold posi
tive battery on allof Ithe relays 3| to 36.
,2,411,441
11
When the transmission stops,v relays ||0 and
U |> release and open the operating circuitv of the
slow release relay |2|, which releases. When
this occurs, two operations take place: At its con
tact |4| positive battery isv removed from the
windings of relays 3| to 34 and 36, and through
armature |42 and its break contact the grounded
condenser |44 supplies a momentary ground to
the grid of Thyratron tube 45, Fig. 1, causing
the tube to fire, in the event that the tube is
not >already in this condition. The ñring of tube
45- causes the energization of relay 35', Fig, 3,
which transfers the circuit from the inner make
`contacts associated with armatures || 4 and |20
of relays ||0 and |||, Fig. 2, over conductors 21
and '|5, to the grid of Thyratron tube 46, whereby
when the transmission of signals is resumed the
ñrst signal received will cause firing of tube 46.
When the distributor brush B of distributor
TD2 is set into operation by the transmission
of a message, the first segment contacted by the
brush after it leaves the rest segment isr segment
|03, which causes a marking tone signal to be
applied to the radio transmitter to modulate the
carrier. The receipt of this markingl signal by
relay || I of Fig. 2 causes the energization of the
relay which, through its armature and make
4contact |20 and .the grounded condenser |21,
causes a pulse to be appliedV over conductor 21
and thence to the grid of tube 40 to cause the
tube to iire. The next segment of ring |0'|` which
is contacted by the brush B' is a blank or' no
current seg-ment'. TheV ñring of tube. 46 and operation of its associated> transfer relay 3S opens
the plate c-ircuit of tube 45 which is extinguished
and releases transfer relay 35', Fig.. 3, thereby pre
paring -the receiving circuiti for the reception of
the next character `to be transmitted. There
lease of relay 3.5' switches the conductor 21 to
the chain circuitl comprising the innerl armatures
31 and break contacts of transfer relays 315 tok 35,
and thence to the grid circuit ofthe ñrst. Thyra
tron tube 4| whereby, when. the next momentary
ground is applied to»v this circuit, theV tube will
ñre.
When the brush B reaches the ñrst code> seg
ment of ring | 0|, and assuming the letter “A”
-will be the iirst character of the message, a mark
ing signal will be transmitted while. brush B
traversesthefirst code segmentl |. This marking
pulse will be received by the system of Fig. 2 and
energizes thel marking relay Ill, This relay,
through its armature |20 and make contact,
causes the grounded condenser |21 to be con
nected,v through conductor 27, to the grid circuit
of‘ the first; Thyratron tube 4| and applyl a
momentary ground to its grid, thereby causing
the tube to fire'. As> the> brush B travels over the
l2
applied by condenser H6 to the grid circuit. of
Thyratron tube 43, causing .the tube to iire.
Pickup relay PU3, however, is not energized,
thereby causing transmission of.' a spacing pulse
to the perforator or printer. Similarly, as the
brush B traverses code segments 4> and l5 of ring
|0:|1, spacing tones will be transmittedl andre
ceived to cause the successive ñring of Thyratron
tubes 44 andz 4,5». After leaving code segmentv 5,
brush Bilagain traverses; the stop segments, which
' causes tube 4B to iii-'e and pickup relay PI'IB‘to
become energized, which releases` pickup relays
PUI. to PU5. Pickup relay PUB remains ener
gized until all the relays PUI- to PUS. have been
completely released, and as soon as `these relays
have been released pickupv relay PUB‘ also releases.
Itis to. be noted that slow release relay |2|, Fig,
3, remains energized so long as signals are being
transmitted, therebyI to hold positive battery'from
source 26h on conductor 2'9 for the operation of
the transfer relays and Thyratron tubes. The re
lease of relay |`2 |-, which occurs upon cessation of
transmission for a period of time appreciably
greater than that required for the transmitter
distributor brush to pass two code segments,
causes all the apparatus of the receiving dis
tributor to be restored'l to normal, which means
.that Thyratron tube 45 is` fired, and thereby ef.
fects synchronization and proper phasing of the
receiving distributor; The radio system differs
from the line wire system in the respect that nor
mally tube 4'5 is firing, whereas> in the line wiïre
circuit tube 46 normally is iiring when no signals
are being received.
In certain types `of grid-controlled gas-dis
charge tubes, the reapplication of plate> battery
-to the tubes may cause the tubes to ñre even`
though their grids are biased' negatively at the
time to prevent firing; To obviate this possibility,
resistances 50, which in the circuit illustrated` are
of' the order of one megohm each, are connected
across the armatures 40 and' associated make con
tacts of the transfer relays 3| to 36, and resist
ances 50’ of the. order of one-half megohm are
connected across the armatures 28 and |4| and
associated make contacts of battery supply relays
>25 and |21,v so that the plate circuits of the
Vtubes arenever completely opened.
Variousmod-ifications of the apparatus and cir
cuit arrangements of the, two specific embodi
ments shown, and various equivalen-ts. or substi
tutes for the devices illustrated, will readily oc
cur to those versed. inthe lart. without departing
from the spirit or scope of the present, invention.
The disclosure, therefore, is- for the purpose of
illustrating the principles of the invention, which
is not to be. regarded as limited except as indi
cated. by the scope of the appended claims.
|1|| releases. Brush B next reachesv thev second (50 What is claimed is:
l. Ina telegraph system in which permutation
code: segment 2,.-causing a marking signal to be
code signals are transmitted by marking and
transmitted. This signall again causes the» op
spacing pulses separated by intervals, a receiv
eration of: relay |.|| andi applies momentary
ing distributor circuit responsive toy said pulses
ground tofthe grid circuit of. Thyratron tube 4t2.
The» operation of tube 42' causesdeenergization of «' comprising a plurality of gas-iilled-- discharge
tubeshaving control electrodes, relay means re
tube 41|.` and transfer relay 3| in the-manner here
sponsive to` said marking4 andl spacing pulses for
tofore described With respectto the line wire1 cir*
applying a ñring potential to the control elec
cuit. Storage relayszPU'l and PUZ will have been
trodes of said tubes as; the marking and spacing
operated in the same manner as heretofore de
elements. of. each signal are received, transfer
‘ scribed.
relays, controlled bythe anode circuits: of, said
When brush B1 passes to the third code: segment
tubes for connecting said relayv means to said
` 3| ol’ ringv |È0|, a spacing tone- is transmitted, and
tubes successively to cause the tubes to. ñre in
thisycauses the operation ofi relay | l0 at there
blank segment following code. segmentl I‘, relay
predeterminedA order, and means controlled joint'
ceiver. This'relay., through »itszarmature ||4f and
make. contact, causes a> momentary _ground to be 75. ~1y by said relay means and said tubes for storing
2,411,441
X13
the marking and spacing code elements of each
'the marking and spacing code elements of each
'character signal received.
`character signal received, and means comprising
at least one of said tubes and transfer relays and
responsive t0 a marking pulse received subse
~quent to the reception vof a character signal for
conditioning the distributor circuit for the recep
tion of the code elementsof the next character
Y
2. In a telegraph system in which permutation
code signals are transmitted by marking and
spacing pulses separated by intervals, a receiv- i
ing distributor circuit responsive to said pulses
comprising a plurality of grid-controlled gas
«ñlled discharge tubes having control electrodes,
relay means responsive to said marking and
spacing pulses for applying a ñring potential to
the control electrodes of said tubes as the mark
ing and spacing elements of each signal are re
signal.
6. In a start-stop telegraph system in` which
permutation code signals are transmitted by
marking and spacing pulses separated by inter
vals, a receiving distributor circuit responsive to
said pulses and a stop pulse comprising a plural
circuits of said tubes for connecting said relay
ity of gas-nlled discharge tubes having control
means to said tubes successively to cause the tubes f
electrodes, relay means responsive to said mark
to ?lre in predetermined order, means controlled
ing and spacing pulses and said stop pulse for ap
jointly by said relay means and said tubes for
plying a, firing potential to the control electrodes
storing the marking and spacing code elements
of said tubes as the marking and spacing ele
of each character signal received, a signal re
ments of each signal are received, transfer relays
cording device and means for applying said stored 20 controlled by the anode circuits of said tubes for
signals to said recording device.
connecting said relay means to said tubes suc
3. In a telegraph system in which permutation
cessively to cause the tubes to fire in predeter
code signals are transmitted by polar marking
mined order, means controlled jointly by said
and spacing pulses separated by intervals, a re
relay means and said tubes for storing the mark
ceiving distributor circuit responsive to said pulses
ing and spacing code elements of each character
comprising a plurality of gas-filled discharge
signal received, and means comprising at least
tubes having control electrodes, means including
» one of said tubes and transfer relays and respon
Va relay responsive to said marking pulses and a
sive to a stop pulse for conditioning the dis
relay responsive to said spacing pulses for apply
tributor circuit for the reception of the code ele
ing a firing potential to the control electrodes of 30 ments of the next character signal.
said tubes as the marking and spacing elements
7. In a start-stop telegraph system in which
of each signal are received, transfer relays con
permutation code signals are transmitted by
trolled by thev anode circuits of sa-id tubes for
marking and spacing‘p‘ulses separated by inter
connecting said relay means to said tubes suc
vals, a receiving distributor circuit responsive to
cessively to cause the tubes to fire in predeter- ^ said pulses comprising a plurality of gas-filled
ceived, transfer relays controlled by the anode
mined order, and relays controlled jointly‘ by
said relay means and `said tubes for storing the
marking and spacing code elements of each char
acter signal received.
4. In a start-stop telegraph system in vvhich‘>
permutation code signals are transmitted by
marking and spacing pulses separated by inter
vals, a receiving distributor circuit responsive to
said pulses comprising a plurality of gas-iilled
discharge tubes having control electrodes, relay
means responsive to said mark-ing and spacing
pulses for applying a ñring potential to the con
trol electrodes of said tubes as the marking "and
spacing elements of each signal are received,
transfer relays controlled by the anode circuits
of said tubes for connecting said relay means to
said tubes successively to cause the tubes to ñre
in predetermined order, means controlled jointly
by said relay means and said tubes for storing
the marking and spacing code elements of each
character signal received, and means including
at least one of said tubes and transfer relays
and operative Iafter a character signal has been
received for conditioning the distributor circuit
for the reception of the next character signal.
5. In a start-stop telegraph system in which
permutation code signals are transmitted by
marking and spacing pulses separated by inter
vals, a receiving distributor circuit responsive to
said pulses comprising a plurality of gas-filled
‘discharge tubes having control electrodes, relay
means responsive to said` marking and spacing
pulses for applying a ñring potential to the con
trol electrodes of said tubes as the marking and
spacing elements of each signal are received,
transfer relays controlled by the anode circuits
of said tubes for connecting said relay means to
said tubes successively to cause the tubes to fire
in predetermined order, means controlled jointly
' by said relay means and said tubes for storing the
marking and spacing code elements of each char
acter signal received, and means for maintaining
one of said tubes fired during the interval fol
lowing the reception of a character signal for
conditioning the distributor circuit` for the recep
tion of the ‘next character signal.
8. In a telegraph system in which permutation
code signals are transmitted by marking and
spacing pulses separated by intervals, a receiv
ing distributor circuit responsive to said pulses
comprising a plurality of grid-controlled gas
ñlled discharge tubes, a capacitative circuit and
relay means responsive to said marking and spac
ing pulses for causing said capacitative circuit
momentarily to apply a firing potential to said
tubes as the marking and spacing elements of
each signal are received, transfer relays Ycon
trolled by the anode circuits of said tubes for
connecting said relay means to said tubes suc
cessively t0 cause the tubes to iire in predeter
discharge tubes having control electrodes, relay
mined order, and relays controlled jointly by said
means responsive to marking and spacing pulses
relay means and said tubes for storing the mark
for applying a ñring potential to the control elec
ing and spacing code elements of each character
trodes of said tubes as the marking and spacing
signal received.
p
elements of each signal are received, transfer 70 9. In a telegraph system in which permutation
'relays controlled by the anode circuits of said
code signals are transmitted by marking and
tubes for connecting said relay means to said "
tubes successively to cause the tubes to ñre in ~
spacing pulses separated by intervals, a receiv
ing distributor circuit responsive to said pulses
predetermined order,-- means controlled jointly
comprising a plurality of grid-controlled gas
by said relay means and said tubes for storing 76 ñlled discharge tubes, means for normally main
2,411,441
^1‘5
taining negative potential on the .grids of said
lyby‘ said' relay means'and said tubes> for-,storing
tubesv to` prevent ñring of the tubes, means com
the marking and spacing code elements of each
'character signal received, and means for syn
.chronizingsaid- receiving circuit with the signal
_transmitting source comprising a slow-release
_ prising al condenser and relay controlled means
responsive to said pulses for causing said con
«denser momentarily to reduce the negative po
tential on the grids of certain of said tubes to
‘cause firing thereof as the marking and spacing
elements of each signal are received, transfer
current for said tubes, said relay remaining' un
‘loperated to disable said tubes. in response toja
¿relays controlled by the anode circuits of said
synchronizing signaßlvw-m
relay which when operated suppl-ies energizing
tubes for connecting saidY relay means and said 10
condenser to certain of said tubes to cause the
-tubes- to fire in predetermined order, and means
controlled jointly by said relay means and said
tubes for storing the marking and spacing code
.elements of each character signal received.
10., In a telegraph system in Which permuta
tion code signals are transmitted by marking and
.spacing pulses separated by intervals, a receiv
ing distributor circuit responsive to said pulses
comprising. a plurality of grid-controlled gas
ñlled discharge tubes, means- for normally main
~
«_
13. In a start-stop telegraph system, a trans
mission line over which permutation code sig'
’nals are transmitted by marking and spacing
pulses separated by intervals, a receiving` dis
‘ tributor circuit connected to said `line and >re
sponsive to said pulses comprising a plural-itypf
gas-filled discharge' tubes having control elec
trodes, a first relay responsive to said marking
n,and spacing pulses and a second relay responsive
pnly to said marking pulses, said first relay ap
20 plying a ñring potential to the control elec
taining negative potential on the grids of' said
, tubes to prevent ñring of the tubes, means com
»prising a condenser and relay controlled means
trodes of said tubes as the marking and spacing
elements of each Vsignal are received, transfer
‘relays controlled by the anode circuits of said
tubes for connecting said first relay to said tubes
-~ responsive to said marking and spacing pulses 25 successively to ca-use- the tubes to fire iny prede
termined order, and storage devices respectively
. for causing said condenser momentarily to apply
a ground to the grid biasing circuits of certain
of said tubes to cause firing thereof as the mark
-ing and spacing elements of each signal are re
for storing the marking and spacing code ele
ments of each character signal received, `sai-d
second relay controlling the operation of certain
~
'
~ ~
ceived, transfer: relays controlled by the anode 30 of said storage devices.
_l 14. In a start-stop telegraph system, a: trans
circuits of said tubesfor connecting said relay
means and said condenser to certain of said tubes
~ to cause the tubes to ñre in predetermined order,
mission line over which permutation code signals
are» transmittedv by‘marking and spacingypulses
separated by intervals, a receiving'distribu-tor cir
and means controlled jointly by said relay means
and said tubes for storing the marking and spac 35 cuit connected to said line and responsive to
lsaid pulses comprising a plurality of gas-filled
zingl code elements of each character signal re
discharge tubes having control electrodes, a'first
ceiVed.
relay responsive to said marking and» spacing
l1. In a, telegraph system in which permuta
pulses and a second relay responsive only to said
tion code signals are transmitted by marking
, and spacing- pulses separated by intervals, a re 40 marking pulses, said first relayY applying a firing
potential to the control electrodes of said-.tubes
-ceiving distributor circuit responsive to said
as the marking and spacing elements of eachA sig
pulses comprising a plurality of gas-filled dis
charge tubes- having control electrodes, relay
nal are received, transfer relays controlled by
the anode circuits of said- tubes for connecting
means responsive to said marking and spacing
said first relay to said- tubes successively to cause
pulses for applying a firing potential to the con
the tubes to fire in predetermined order, and
trol electrodes of said tubes as the marking and
storage devicesrespectively for. storing the-mark
spacing elements of each signal are received,
ing and spacing code elements of each character
transfer relays controlled by the anode circuits
~ of said tubes for connecting said relay means to
said tubes successively to cause the tubes to fire
in predetermined order, means controlled joint
ly by said relay means and said tubes for stor
signal received, said second> relay controlling the
application of marking pulses to said storage
devices.
i
'
-
'
'ing the marking and spacing code elements of
15. In a telegraph system, means for trans
mitting a radio carrier which is modul-ated by
.each character signal received, and means for
different frequencies respectively representing
marking and spacing pulses, means for rece-iv
ing said radio signals comprising means for de
.signal transmitting source comprising a slow
tecting and filtering out said marking- and spac
acting` relay for controlling the supply of ener
ing pulses, a distributor circuit comprising a plu
gizing current forV saidtubes, said relay being
rality of gas-filled discharge> tubes having con
effective to disable the tubes in response to a
synchronizing signal.
`
60 trol electrodes, means comprising a relay `re
sponsive to said spacing pulses and a relay re
12. In a telegraph system in which permuta
lsponsive to said marking pulses for applying a
tion code signals are transmitted by marking
firing potential to the control electrodes of said
~ and spacing pulses separated by intervals, a re
tubes as the marking and spacing elements of
ceiving distributor circuit responsive to said
each signal are received, transfer relays con
.pulses comprising a plurality of gas-filled dis
trolled by the anode circuits of said tubes for
_charge tubes having control electrodes, relay
connecting said first named relay-s to said tubes
_means responsive to said marking- and spacing
successively to cause the tubes to iìre in prede
- pulses for applying a firing potential to the con
termined order, and means controlled jointly by ,
trol electrodes of said tubes as the» marking and
said relays and said tubes for storing the mark
lspacing elements of each signal are received,Í
ing and spacing code elements of each character
_transfer relays controlled by the anode circuits l
signal received.
of saidl tubes for connecting said relay means to
EVERETT R. LEROY.
said tubes successively to cause the tubes to iire
GEORGE L. BUSH.
„in _predetermined order, means controlled joint
synchronizing said receiving circuit with the »
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