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Sept» 24', 19%.
Filed June 18, 1943
_s sheets-sheet 1
Jl. L. .
sept. 24,1946. I
Filed June la, 1943
3 sheets-Sheet 2
© i I@
To TRAysM/rrfR
404 '
_ ¿figg?
¿ou/5 A. „Pats/1
Patented Sept.` 24, 1946 '
t 12,408,049
Louis A. de lRosa, ‘_West Brighton, Staten'lsland,`
AN. Y.,-as’signor to Federal Telephone-,and Radio
Corporation, Newark, N. J., fa corporation j‘o'i' ‘
Application Juneis, 1943„scria1 No. 491,288
r6 claims. (ci. 17e-ecol
This invention relates to improvements-‘in i'n
telligence transmission systems, and more ‘par
ticularly to systems in which’intelligence is trans
-the derivation-ofiseduentiallyltimed pulses from
a master electronic counter circuit, divided into '
a ïnumber 'of sub-counter circuits >corresponding
to the number `OfJbands _used informing a ’char
mitted in the form of pulses, >and received -and
converted into visual intelligence.
acter, eachofsaidfsub-counter circuits, in turn,
Systems have been heretofore proposed in
which intelligence in the form of Apulses or a
series of pulses 'is transmitted directly or by car
comprising- a number» of `gaseous discharge tubes
corresponding to the maximum >number of .pulse
forming `sections -`of leach band, together _with
rier wave to a receiver where `such` pulses Aare
controllable means «for applying chosen pulses
converted into visual intelligence either by means 10 from `each bandito-‘a transmitting and character
'ofV controlling1 the vpattern on `'the screen ofja
reproducing system.
cathode ray tube ‘or‘b‘y impressions 'upon a mov
These and other Lfeatureszoiî the invention will
‘ing tape. In some systems the character? to be
be best'unders'tood "andiappreciated "from the .fol
transmitted is divided Y_up into several transverse
lowing `-description«of a preferred embodiment
bands `suchga‘siive orV sevencf _several Vgroiïips 15 thereof, «described lior ‘purposes :of illustration „and
cf‘pul'ses each, the number 'and position of'pulses
shown -in :the ,i accompanying4 drawings in which:
’ in each band determining the ‘formation of *the
Fig. Ã1 is. a ‘block circuit diagram of g the 'pre
transmitted character. ‘The pulses. maybe sent
ferred ‘form 'of pulsegeneration,,selectionand
at a common frequency, or, it is sometimesça‘d
vantageoiis to> transmit each band 'of pulses' at 20
"different frequencies.
transmitting: ystem according totheA presentin
In allsuch systems _the time interval between
` tially ‘in block form„o'f the-pulse deriving-¿and
pulses or sets 0f pulses is determin'ative ‘of the
character to be reproduced atïthe receiver, and
controllingsystem showninçEig. 1;
Fig.`3 -lis a circuit diagramillustrating further
various Ameans have been propose‘d‘to produce
25 details of` some of, the electronic `counter circuits
sets of such timed pulses in accordance withthe ‘ sh'own‘in Figsßliand 2;
‘characteristics of the intelligence to'be 'trans
v-`Figari showsexamples ofìintelligence inggthe
mittedysuch as a Vletter or numeral. ` In ¿prior
form~ ofV letters `and;numerals; of the ¿type _pro
duced byïtheisystemillustratedinzFígs. _1, 2 and 3;
Vsystems. it has been usual’t'o pre-form mechanical
’patterns which, through the use of light-respon 30 Fig. . 5 is .a vv.block circuit diagram; of , agreceiving
‘sive tubes‘or similar means "form series ofç'puls’es
` systemiadapted to "be 'usedwith 4the transmitting
corresponding to the `»letter to bejtransinitte’d, 'the
`system„illustrated-‘in Eigs. l, 2.a`nd3.
pattern chosen being controlled -b'y a keyboard or
similar means. Such systems and such means
‘Generally` speaking, ` the. preferred :arrange
ment `for producing character-forming _pulses:acare described, for example, inthe copendin'g ap 435 cording fto the. present invention, and illustrated
plications of Edmond M. Deloraine, S. N. 415,554,A
in Fig, 1, will-«consistnof a switch,operating-` key
ñled October 18, 1941, and Edmond M. ‘Deloraina
board "-10 »provided with a plurality of keyshav
et al., S. N. 469,056, ñled December 15, 11942.
ying indiciathereon corresponding ïto the >char
It is one of the objects of the present invention
acter -toèbe‘- produced. .The ¿switch mechanism of
to eliminate the use of mechanical devices 'previ
ously necessary in producing the timed pulses
40 the keyboard l0 lis isupplied with, pulses from a
master electronic .counter 4control circuit icon
used 'as a basis for the formation of character
identifying signals.
sisting "of>
lplurality` Vof _subf‘electronic ‘counter
and 'controläcircuits l,la,~l,|b„ `Ilc, lid, Ile, Ilf
Another object .of my invention is directed to
and - l ly, îthe ‘l number of¢ these ‘_subfcounter » cir
ward the use 'of an electronic counter circuit 'in 45 cuits dependingîupon‘theinumber of transverse
connection with what may be termed anV elec
‘ bands" into which the charactersito be ‘reproduced
trical pattern for deriving sequentiallyV timed
are divided. The: various sub-‘counter ‘ and `conpulses in an intelligence transmissionsystem.
trol circuits Hato VI Itri-inclusive are serially con
-A further object of this` invention is to pro
nect'ed`- with ¿one another with- means being pro
vide an> electronic `counter Acircuitïfor "deriving
sequentially timed pulses in an 'intelligence
transmission system, together with controllable
means for starting and stopping ‘said f‘co‘unter
.rMorefspeciíicallm this invention contemplates
50 vided ’forßre-actuation of the circuit Ila by the
last circuit Iïlgft'o „for-m a -'continuously lrotating
master > counter Y circuit. HThe Aoutputsî of' the j vari
` ous, countercircuits as controlled bythe’switches
four periods; in .the ñfth and sixth bands by the
single pulse occurring in the ñrst period only;
frequency oscillator 24. The output of the gate
tube is connected to a transmitter and modu~
and for the seventh band sequential pulses occur
lator 26 which may be supplied by a carrier wave
ring throughout the entire period. In order to
source 33. While the invention is particularly
energize the transmitting means by sequential
adapted for use in the radio transmission of sig 5
.pulses >to spaced and timed as to form a connec
nais, it will be ¿clear` to those skilled inàfthis art
étionïsuch. astheletter “EL” it will be necessary
that a direct rwire transmission wither without
a carrier can be utilized, if desired.
As will be seen in Figs. 2 and 3, each of the"
electronic counter and controlcircui-ts consists
to form the proper connections between the in
`vdividual electronic counter and control circuits
with the actuating circuit of the gate tube. The Y
sponding to the letter “E” is depressed, switches
40a, 40h, 46c, 45d, 40e and 43j will be closed
to respectively interconnect output leads from
manner in which this is accomplished can bestl
_ ber’understood, for example, by a study of FigsrZ
and 3. For example, if one of the keys 38 _corre
of an electronic counter circuit from vwhich are
derived output leads whichV are' controlled bythe
keyboard switches, such control 'being'varied _in
dependence upon the individual’switchoperated.
Since the outputs from any one counter circuit
may be applied -tora large number of- switches, „
the electronic counter circuits 12a .to l2g inclu- '
' each output lead is separated through suitable '
sive, to the actuating circuit of the gate tube 22.
As also previously pointed out with respect to
isolating resistors into a plurality of output coni-ii ,
ductors connected to individual switches. For ex
the letter “E” a series of sequential pulses are
ample, the electronic counter-and control circuit
Vnecessary throughout lthe entire period of the
Ha will consist` of; an electronic countergcircuit
`first character-forming band or, in other words',
.12a 'from the individual'tubes of which are de
.the first electronic counter circuit must supply
rived output leads which, in turn, are each fur
' a continuous sequence of timed pulses for this
ther divided by. resistor banks suchias la, 2a, 3a, . period.y Therefore, the output leads from each
4a, 5a, Scand 1a..,Similarly„the electronic coun 25
`of the gaseous ‘discharge tubes Ma of the counter
ter. circuit |21) has associated therewithîresistor
-`circuit 12a are connected together to a common Y
banks lb to 'Ib inclusive, counter _circuit I2C with
resistor banks vlc toflc inclusive, etc. The various
electronic ‘counter `circuits illustrated by way of_
`leadj'350 _through a resistor of each resistor bank
ía >to la inclusive. Closure'of the switch 4Min
terconnects this common lead 350 withfthe con
trol supressor gridof the gate tube 22 through
the common control lead 268. To form theV next
band ofV the letter “EL” it is only necessary .to
apply a single'pulse during the firstportion of
this second band. Accordingly, the switch 40h
example are similar in arrangement and opera
f tion `to thev “Electronic switchingl system’f de
lscribed, in U. sfpatent to> Shumard 2,146,862,
-issued February 14, '1939, although other Yequiva
lent electronic Acounter circuits lcould be used. / ¿
i' As previously noted,‘the electronic 4counter cir
cuits are serially connected with one another with
.Y closes a circuit from the ñrst gaseous discharge
tube ofthe electronic counter circuit 12b through
a connection from the last countery circuit lead
, a resistor of resistor bank Ib1 conductors 354 and
352 and thence to the conductor 268 leading to „
ing back to the ‘flrst'i so that when the master
counter circuit is 'once energized it willl continue,l
to 'operate' leach counter‘circuit as best seen from
Fig. 3, and Willvpreferably consist o_f a plurality '
the gate tube. Likewise, for band three, only the
output from theñrst gaseous discharge tube of
Í¿ electronic counter circuit I2C is utilized and clo- '
sure .of v'the switch 40C will establish a circuit
this tube through a resistor of resistor bank
,. from
' Ic, conductors 358 and 356 and thence through
of gaseous discharge tubes so interconnected _with
one another ina manner known »to the ar-t that
' vwhenV a ñred vtube isenergizedr it will/cause enï.
ergization of the next succeeding tube-which,` in
turn, will extinguish the Vprior tube of the series.
'A pulse may be derived `from the cathode ofeach
' tube in each electronic/counter> circuit'.v The in
' dividual electronic counter» circuits _themselves
" are serially interconnected with one anotheras
by coupling condensers so that the ñrst, tube of
' each counter circuit will, after a predetermined
short interval be energized by the »last tube of the
»prior counter circuit and will, in turn, then extin
guish that tube. In accordance with the present
the-switch to normal conductor 263, For the
fourth band, the output of the ñrst'four tubes of .
electronic counter circuit I2d is utilized. Thus,
Í the output leads from the first -fourtubes of this
electronic counter circuit are connected through
individual resistors of banks» Id, 2d, 3d and M
to .common> conductor 360 and thence through
the switch 40d to the common gate tube’lead ZIB.
For the iifth band, again it is only necessary vto
55 derive a pulse from the iirst tube of electronic
counter circuit l2e and closure of the switch 40e
will establish the necessary connections. VThe
invention there are a number of individual elec
tronic counter circuits corresponding to the num
ber of bands into which a character is to-be di
circuit may be, traced through a resistor of re
quentially energized gaseous discharge tubes cor
sistor bank Ale, conductors 364 and 362, Ithe
switch 40e and the common gate tube conductor
2768. Likewise, for the sixth band, closureof
responding to the number' of divisions in each
band. In accordance with the form of inven
_of resistor bank lf and thence through conduc
tors 310 and 368 to thecommon conductor ,2168.
vided, while each electronic counter circuit itself
containsv a number_of serially connected, se
switch 40j establishes acircuit from a resistor
.tion shown for purposesof illustration, theichar
acters will 'be dividedinto seven-bandsconsist
ing of seven sections each, as will be more read
> ily apparent from a study of Fig. 4. showing ex
amples of typical characters to be transmitted
For the seventh band, it is necessary to derive a
fcontinuous sequence of pulses from all of the
` gaseous discharge tubes of electronc counter cir
, cuit I2g. Accordingly, the outputs of all lof these
and reproduced. For example, it willbe seen that .,ì .
tubes are connected -together through individual
the letter.“E” `is formed of seven bands. The 70 >resistors of banks lgto 'Ig inclusive to common
, Aconductor 314 and thence through conductor 312
Y Yfirst band may be formed by a s_eries of sequential
' pulses extendingy throughout the ,entireV band.. V In
' .the~ second and _third bands,>however,-g the letter
is formedbyvpulses in ‘the first periods only; in -«
the fourth band by sequential pulses for the iirst
. andthe switch 40g to the common gate tube con
ductor 268.
. ,
In the‘formation of certain charactersit may
be necessary to utilize different and separated
l @108,049
pulses of each electronic counter circuit. This
âllâland resistor banks Ib, 2b and 'Ib for counter
circuit |2b and switch 44h; conductors 400, 405,
will become apparent, for vexample, if an attempt
is made to trace the required control circuits to
`form the numeral “2,” shown in Fig. 4‘ (B). For
example, if the switch 38 corresponding to this
numeral is depressed, pulses are derived from the
electronic counter circuit |2a and applied to the
gate tube 22 for the second to the sixth periods
«4M and 353 and resistor banks Ic, 3c and 1c for
counter circuit |2c, and switch 44o; conductors
405, 483 and ‘4|D and resistor banks ld, 4d and 'ld
-for `counter circuit |211 and switch 44d; con
ductors 364, cl2, 4I4 andMG and resistor banks
le, 5e and le for counter circuit |2e and switch
411e; conductors 31D, 4|8 and 42E) and resistor
10 banks lf, 6j and 'if for counter circuit I2]c and
-iswltch 44j; and conductors 422 and 424 and re
»sistor banks Igto 'lg for counter circuit |29 and
inclusive. rl‘hus itis necessary to-connect the
outputs of the second to the sixth gaseous dis
charge tubes of electronic counter circuit |2a
together, but in order to prevent confusion with
other control circuits, these are again brought
through isolating resistors in resistor banks 2a
to 5a inclusive. The common lead 315 from the
‘resistors in these banks will be connected upon
closure of switch 42a to the common conductor
263 for controlling the gate tube 22. In the case
of >thefsecond band forming numeralr“2,” it will
be noted that a single pulse is required for the
ñrst period of this band, then there is hiatus,
then a series of three sequential pulses dur
"ing the fifth, sixth and seventh bands. The
switch` 42h, therefore, closes two contacts be
tween the electronic counter circuits |217 and the
control lead 268 for the gate tube. The first
contact 318 may be connected to the lead 354
îswitch 44g.
sequence of pulses beginning with the ñrst tube
of the first counter circuit l2a and ending with
the last tube of the counter circuit |2g,` it is pref
erable that each letter be traced several times
for the sake of'V clarity, and for this reason it
20 wasipreviously mentioned that the counter cir
cuit I2a is re-started after the last counter cir
.cuit l'êg to form a continuously rotating master
lcmintercircuit. However, means must be pro
vided forV starting the ñrst tube of the ñrst
25 counter circuit |2a and, eventually, means must
alsov be provided for stopping rotation of the
master counter circuit after a predetermined
number of desired traces have been made for
` which also is connected to the switch 4Gb for
forming the letter “E” since the two characters
Vhave this portion of the second band in common.
The second connection, however, may be traced
‘- While a character can be formed by a single
each letter. For this reason,` each of the char
so acter-identifying keys 38 operates another switch
30 which controls starting and stopping means
for the master counter circuit. It will be under
stood from a study of Figs. 2 and 3 that when
the keys are raised, the switch 3B does not com
frcmconductor 383 to individual resistors of re
sistor banks 5b, 6b and 1b which are fed from
the last three „gaseous `discharge tubes of the
electronic counter circuit |2b. Switches 42o, 42d,
42e, and 42f will control the application of elec
tronic counter circuits |2c, l2`d, |2e, and |2f to
plete any control circuit.
`switches are already known. However, as
akeyfis depressed it first wipes a pair of contacts
-l the control of the gate tube 22 in a similar man
to‘rnomentarily close one circuit, While in the
ner as previously described above. For example,
final 'depressed position of the key, the switch
the lead 382 to switch 42o is connected to resistors 40 completes a second circuit. From the following
in resistor banks 4c and 5c of the counter circuit
it will be obvious that this -wiping action of the
|20 to provide two sequential pulses during the
contacts must be brief enough so that the ground
third bank. Conductor 384 for switch 42d is con
L connection is not present when tube Ma is renected to individual resistors of resistor banks
stored after the following tube has operated. Ac
^ 3d and 4d of, counter circuit |211, conductor 386
cordingly, as the key is depressed and the switch
for switch d2? is connected to individual resistors
i momentarily-closes the first circuit, the grid :of
of resistor banks 2e Yand 3e of counter circuit |2e,
the i'lrst tube ida of the electronic counter circuit
and conductor 338 to switch 42f is connected
- lila ls momentarily connected to ground through
A to individual resistors of resistor banks |f and 2f
for the flrst`two tubes ofV counter circuit |2f. .50 4conductor Zit, thus reducing the negative grid
bias onthis tube to render the same conductive.
Since the last band for the numeral “2” is the
' When this tube becomes conductive the remain
same as the last band for the letter “E” previously
\ ing tubes of this counter circuit and thence the
- described, the switch 42g may be connected to
the conductor 372 of switch 49g through _lead
tubes of the following counter circuits will be
cated letters, however, `it may be ‘necessary to
start and stop the application of pulses to the
counter circuit |2g through a conductor 208 and
, come sequentially conductive. In the final de
399. Other letters and characters can be built 55
pressed position of each key, however, the switch
up from sequentially timed pulses in the manner
r30 will close a circuit from the grid of the iirst
described in connection with the letter “E” and
tube Illa of the electronic counter circuit I2a to
the numeral “2.” In some of the more compli
the cathode of an additional tube |4’y of the _
gate tube as much as three times in a single band. 60 a condenser 209. When a tube of the counting
chain such as tube Ilia ñres, its cathode poten
This is true for the letter “N” shown in Fig. 4
tial jumps from a slightly negative value (due
- (C), particularly for the third, fourth and fifth
to the C battery bias) to a highly positive value
bands thereof. This only necessitates further
control switches or further control contacts on
(due to the fact that the cathode is in the series
65 path between ground and B battery). This jump
individual switches. For example, it will be
noted that in the form of invention shown, the
switches ¿4a to 44g inclusive all have at least two
contacts for connection with the cornmon‘gate>
tube conductor 25B, the switches 44o, c4d and 44e 70
having three contacts apiece. If desired, the
specific circuits for the formation of a letter “N”
may be traced through conductors `392 and 3,94
in potential is transmitted to the preceding tube
cathode, by means of the commutating condenser,
to raise that cathode to a potential above that of
the B battery and thereby extinguish the tube.
The jump in cathode potential is transmitted to
l the> grid of the succeeding tube (via a> resistive
l network) and to the cathode of the succeeding
tube (via another` commutating condenser) to
and resistor banks la and 'la for the ‘counter` cir
Vraise-both 4gridand cathode in potential posi
cuit |2a and the switch 44a; conductors 396‘and ,i _ tively; The succeeding tube therefore does not
this time, but as the charge -onthe Vcom
.'rnutating‘condenser leaks oiï the cathode 'of the
>succeeding. tube becomes more negative. The
vgrid yof the succeeding tube, however, continues
to remainat ‘the same positive'potential, s'o that
eventually the succeeding tube breaks-down, eX
tinguishing the' present tube.
In the `case of
tube Nia, the grid israised to this positive poten
tial by a surge flowing through the isolating
"actin l»synchronisrn with the generator 292 and
-operating -agsecond saw-toothgenerator 323. A
-phaser V293 V'may be 4used vto control the oscillator
n285 so that the picture ofthe received character
may >be properly positionedupon the screenv of
the cathode ray tube. synchronizing means
other than the phaser'2981willïnot be required.
rEhe receiving system just described forms no
- speciñcpart of the present-invention andis dis
closedfin more `detail in the copending applica
condenser .2@9. This condenser, after starting 10 -tion of E. M. Deloraine and the present appli
initially discharged (because of resistor 2H)
>cant; S1 N. 489,760, ñled June 5,1943.V
gradually» acquires a biasing charge so that even
-Itwill also be obvious to-those skilled in this
tually the iirinfg of the preceding tubeld’g 'will
. art that thesignals‘may be reproduced by means
»not raise the grid `of
V`other than acathode raytube for example, upon
Ivalfueto.nre tube lita. The counting then ceases
Va moving tape. .In .such vcases each band of the
-withítube lii’gignited, Tube Mfg is later ex
letter Vwould be controlled by an individual pencil
'tingnished when tube vMaires >upon the grid of
or. other marking «device and instead of `using `a
tube common to all ofthe electronic '
#tube ma being grounded by the `operation of Va
keyJSû.' So far as concerns tube M’Q, it is known
single ‘gate
the Adrawings in which case tube l4’9
ï would become conductive‘in regular course'and
"dividual gate tubes corresponding to each band ~
of theA character-to be formed is to be found in.
circuits,l -each electronic counter circuit
`that' such tubes may .be self-extinguishing if the .20 vcounter
Ycould operate its individual gate tube whose out
'external res istance . in the cathode-anode circuit
puts-would be -separately'transmitted toV the re
"be »adjusted sufficiently high for that purpose.
cei‘ver. Tapeqeproducing devicesiof this char-Y
lIt iscustomary however, 'to provide a resistance
acter `are rknown tothe art andV need not therefore
to»ground connection for the .cathodes as 1s
:be described 'in detail.v A system for utilizing in
-‘ remain so’ till operation Aof Vthe 'next key where
Aupon tube ldlc at the beginning of a new cycle
more detail inthe aforesaid copending Deloraine
1de Rosaapplication, and, also the application of
de Rosa alo-ne, S. N. 491,287, ñled June 18, 1943.
»Íebservedt'hat tube 145g is a special tube with no 30
CertainY details ofv construction rwhich -would
Yno’nir-iections for Vkey switch control. The number
be iobvious to thoseskilled in this art have not
' 'of-_»revclution`s of the master counter circuit which
been `minutely îdescr'ibed since they themselves y
eancccur before` this conditionis established
are not .considered to `form rany part of the jin
'will depend 'upon the >value of the condenser 209
vention. >For example, meanswill Ybe provided
and, Viin accordance with the present invention
for releasingV a depressed key of the keyboard,
`may be of .such value as to pro-`
' this condenser
without. pressing -some other character-forming
duce a ciear, readable image of the transmitted
key. While I have illustrated in Figs. 2 and 3
character.' Inpractice it has been found that
the use of switch means for each key to start
Áthe condenser 229 is discharged slowly through
and "stop 'the master counter circuit,‘it will be
l"the leakage of
that such-- switch means maybe in the
Vlapse of time before a secondakey is depressed
actuated key if desired. Fur
it is discharged and in condition to take part
‘entinguishestubeïlii’g. In this connection it is
zin Vthe.‘subsequent cycle. In order however to
"assure this result 'the usual practice has been
l followed inshunting the condenser with the high
'resistance '2i l. With present reproducing ap
*paratus the image of each character must remain
for cnewhalfto one second'for'continuous read
thermore, while I ’have illustrated as .an l example
ïof‘this invention a keyboard in'which the keys
’ directly operate switches for interconnecting'the
' outputs of the masterV counter circuit .with the
gate ‘tube/it will be vunderstood by those skilled
>in this art I‘that individual keys may actuate re
_la'y'sio'r applying this directly insteadiofindi
but less time'is required if
the image is photographed. In view of .this small Y50`> rectlfy._` ’The for-'m of switchïmechanism illustrated
Ah‘as‘only been given by way of example and itfis
>length of time, the characters maybe transmitted
not intended that this invention be'limited ‘to
»by depression of the individual keysV without re
any 4particular type of keyèoperated switch mech
gard to the time it requires for the desired num
ber of revolutions of the master counter circuit.
r`No means have been illustrated for deñnitely
By the time an ordinary operator depresses a ¿
synchronizing the receiver with the transmitter
second. key the letter or character formed by rea
system. As previously stated, such synchroniza
son of the depression of a prior key will already
tion‘is not _necessary in most cases and the mere
be 'faded out since the master counter circuit
adjustment of thescanned voltage by a phaser,
will already have stopped. It is to be under
stood, of course, that in accordance with the con 60, as described,.to bring the picture of the charac
struction of ordinary keyboards, means will be
ter-to the center- of the screen is'usually suf
provided for preventing the depression of more
Aíicient. However, if positive synchronization is
' ing `by an operator,
than one key at a time.
desired, for'example, in the case of a tape re
l - Means for receiving the character-'forming sig
' >nals generated by the system illustrated in Figs. 65
" l, 2 and 3 and for reproducing thesersignals as
'visual intelligence are illustrated in Fig. 5. Such
include a broad band
pro'ducer, this'may be effected by the transmis
sionv andv reception of an additional synchroniz
. ingxpulse in any manner known to the art.
`Whi1e I` have shown and described one em
receiving system~ may
bodiment of my invention it is to be understood
lreceiver 399 acting through ’an amplifier 322 di
that it may be >embodied in other forms without
'rectly'upon the control grid 232 of a cathode ray 70
_ ' ‘tube 25d.. A horizontal sweep Voltage may be
‘ “derived from an oscillator 296 acting through a
¿clipper V21288 and a diiferentiator29ll upon a saw
while vertical sweep voltage
` 'may be derived from an oscillator 294 keyed to
'departingfrom Vthe principles thereof and that
"this ldescription is made only by way of example
andnot as a limitation on the scope of `‘rny‘in- `
‘ventionfias'iiset forth in the objects and thea-c-l
sub-counter circuit with the first4 tube of the iirst
l. A pulse intelligence transn'iissionV `system
comprising character-identifying elementsl and
sub-counter circuit, whereby said master counter
means -controlled therebydor establishing an
circuit will operate in a continuously rotating
fashion and wherein said starting and stopping
electric pattern 'correspondingV to` `>a respective, ‘
character, a means including an electric dis
means includes a condenser and a ground, means
charge'` device counter circuit operating ' during
each cycle thereof to scan' saidA pattern: and de
rive thereby a series of sequential `pulses peculiar
to each character, means foriseparately transmit
ting said pulses of said series and means for ena
the grid potential thereon and rendering said
bling a predetermined repetition of‘the scanning
of each character pattern'.4
connecting the grid off-the nrst tube ci the nrst
sub-counter circuit `»to the ground for reducing
iirst tubeconductive, and means for connecting
the grid of thesaid ñrstV tube and the cathode`
of said additionalltube `to ,ground through said
condenser to build up suñicientpotential on said
condenser-after a number of cycles of operation`
2. A pulse intelligence transmission system
of-said `master,counter .circuit to extinguish said
comprising character-identifying elementsv and 15,. additional tube.«without re-energizing the grid
means controlled thereby for establishing an elec
of said iirst tube, whereby said master'counter
tric pattern correspondingito a respective char
circuit willcease to operate.`
act-er, means including an electric‘discharge de
vice counter circuit operating >during eachlvcycle
said ser-ies.
S. A puise intelligencetransmission system ac
cording to§claim~2 including meansfenabling aI
tube interconnecting` thellast tube of thelast sub
‘counter circuit withthe first tube of` the first
sub-counter-circuit, whereby said counter circuit
will operate in a continuously `rotating fashion,
in which said switching means comprises'a key-Á
25 board provided with a plurality: of control-keys`
predeterminedrepetition of the scanning‘of each
character pattern,
combination with i ari-additional. gaseous r discharge
thereof to `scan said pattern, means controlling`
the scanning device to derive sequentially pulses
timed relatively to represent said character and
means for separately transmitting the pulses of
9. The combination according` to. claim 5,- in
`each having indicia thereon corresponding toa
character to be- transmitted, and switches inter,-`
mediate said pulse-derivingmeans and said trans-1
4. A pulse intelligence transmission system ac
mitting means operated` by -said keys, and` in
cording to claim- Zwherein the scanning means 30 which said starting and stopping means includes
operates effectivelyto scan the circuit iieldin two` ‘a condenser, aground, negative‘grid biasing
V 5. An intelligence transmission system utilizing
pulses so related that. the conñgurations of char
acters transmitted by the pulses are represented by ' ’
means on said ñrst tube of theflrstsub-counter
circuit, an additional switchopcrated by- each
switch, and conductors interconnecting each of
selections therefrom arranged in successive bands,
said additional switches ¿toisaid grid„said„con
denser and thev grid of -saidfl'irst `,tube and the`
the combination of a master electronic counter cir
cathode of said additional tube, so that when- a
cuit comprising a pluralityof sequentially ñring
gaseous discharge tubes, said master electronic
key is depressed each key ñrst, momentarily, con
nects the grid of said iirst tube to ground for re
counter circuit being divided into a plurality of so moving the grid biasing means therefrom to start
serially connected sub-counter circuits corre
the master counter circuit operating, and then in
spending to the number of bands for forming the
the ñnal depressed condition each switch con
characters, and each sub-counter circuit con
nects the grid of the said ñrst tube and the
taining a number of gaseous discharge tubes cor
cathode of said additional tube through said con
responding to the assigned number‘of pulses for
denser to prevent starting the ñrst tube after a
each band, means deriving pulses from each gase
number of cycles of operation of the master
ous discharge tube, means for transmitting pulses,
counter circuit.
means for starting and stopping said master elec
10. In a system for the transmission and re
tronic counter circuit, and controllable switch
ception of intelligence, the combination of a plu
means interconnecting said pulse-deriving means
rality of serially connected counter circuits with
to said pulse transmitting means to apply sequen
the last counter circuit connected back to the
tially timed pulses thereto in accordance with
ñrst counter circuit to form a rotating master
the shape of a desired character.
counter circuit system, each of said counter cir
6. The combination according to claim 5, in
cuits including a plurality of sequentially ñring
which said switching means comprises a keyboard ,~
provided with a plurality of control keys each
having indicia thereon corresponding to a char
acter to be transmitted., and switches intermedi
ate said pulse-deriving means and said transmit
ting means operated by said keys.
’1. The combination according to claim 5, in
which said switching means comprises a keyboard
provided with a plurality of control keys each
having indicia thereon corresponding to a char
acter to be transmitted, and switches intermedi
ate said pulse-deriving means, operated by said
keys, and in which said starting means includes
an additional switch actuated by each key con
nected to the grid circuit of the first tube of the
gaseous discharge tubes, means deriving a series
of sequentially timed pulses from said serially
connected counter circuits, a normally non-con
ductive gate tube, a high frequency energy source
for said gate tube, an actuating circuit for the
gate tube, means for starting and stopping said
series of counter circuits, variable switching
means intermediate said various pulse-deriving
means and the actuating circuit of said gate tube
to apply sequentially timed pulses thereto in ac
cordance with the intelligence-signifying signals.
11. The combination according to claim 10, in
combination with an additional gaseous discharge
which said switching means comprises a keyboard
provided with a plurality of control keys each
having indicia thereon corresponding to a char
acter to be transmitted, and switches intermedi
ate the pulse-deriving means and the actuating
circuit of said gate tube, operated by said keys.
12. The combination according to claim 10, in
which said switching means comprises a key
tube interconnecting the last tube of the last`
board provided with a plurality of control keys
first sub1-counter circuit, and means controlled
by said additional switches for momentarily in
creasing the grid potential of said first tube.
3. The combination according to claim 5, in
each having indicia thereon corresponding to a
character to be transmitted, and switches inter- `
mediate said pulse-deriving means and the actu
ating circuit of said gate tube operated by said
15. The combination according to claim 13, in
`which said switching means comprises a key
board provided with a plurality of control keys
each having indicia thereon corresponding to a
keys, and in which said starting means includes Ul character to be transmitted, and switches inter
mediate said pulse-deriving means and the actu
f an additional switch operated by each key con
ating circuit of said gate tube operated by said
' nected to the grid circuit of the'iirst tube of the
keys, and in which said starting means includes
firstA counter circuit and means controlled by
an additional switch operated by each key con
said additional switches for momentarily in
creasing the grid potential of said first tube.
13. In a system for the transmission and re
ception of intelligence, the combination of a
plurality of serially connected electronic counter
10 nected to the grid circuit vof the first‘tube of
the iirst counter circuit, and means controlled
by said additional switches for momentarily in
creasing the grid potential of said ñrst tube.
16. The combination according to claim 13, in
circuitswith the last counter circuit connected
back to the ?lrst counter` circuit to form a rotat 15 combination with an additionalv gaseous dis
charge tube interconnecting the last tube of the
ing master counter circuit system, each of said
last electronic counter circuit with the ñrst tube
counter circuits including a plurality of sequen
of the first electronic counter circuit, whereby
tially ñring gaseous discharge tubes, means de
said master counter circuit 4will operate in a
riving a series of sequentially timed pulses from
said serially connected counter circuits, a nor 20 continuously rotating fashion, and wherein said
starting and stopping means `includes a con
mally non-conductive gate tube, a high fre
denser, a ground connection, means providing a
quency energy source for said gate tube, an actu
negative grid bias on the‘flrst tube of the ñrst
ating circuit for said gate tube, means for start
electronic counter circuit, means connecting the l
ing and stopping said master counter circuit and
variable> switching means intermediate said 25 grid of the said tube to ground for reducing the
grid bias thereon and rendering said first tube
pulse derivingmeans and the actuating circuit
conductive, and means for connecting the grid
of said gate tube to apply sequentially timed
of said first tube and the cathode of said addi
pulses thereto in accordance with the intelli
tional tube through said condenser to build up
gence-signifying signals.
14. The ycombination according to claim 13, in Y 30 suiiicient potential on said condenser after a \
number of cycles of operation ‘of the master
which said'switching means comprises a key
counter circuit to prevent re-energizing the grid
board provided with a plurality of control keys
of said first tube, Wherebysaid master counter
each having indicia thereon corresponding to a
circuit will cease to operate.
character to be transmitted, and switches in
termediate the pulse-deriving means and the
actuating circuit of said gate tube, operated by
said keys.
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