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Патент USA US2115185

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April 26, 1938. '
Filed Jan. 25.‘ 1936
Patented Apr. 26, 1938
v 2,115,185
Karl Weber, Berlin-Tempelhof, Germany, as
signor to G.v Lorenz A. G.,' B'erlin-Tempelhoi',
Germany, a corporation of Germany
Application January 25, 1936', Serial No. 60,835
In Germany January 30, 1935
21 Claims. (01. 178-23)
This invention pertains .to automatic tele
graph systems and apparatus and more particu
held out of the path. of pull bar stop member 2|.
larly to printing telegraph apparatus arranged
member 23 shown in its letter case position and , v
for inclusion at a station unattended by an oper
cooperating with a case shift latch 24 which en
gages and restrains key operating lever 25., Pull 5
bar'22 engages one end of pivoted pull bar rock
ing lever 26 whose other end operates latch 21 in
The principal object of the invention is to pro
vide apparatus which will send automatically in
response to operation of a single key code signal
combinations representing certain prearranged
10 information.
A corollary object is to provide a multi-code
sending key operating to send a plurality of code
signal combinations in response to each opera
tion of the key.
A further object is to provide signal responsive
mechanism by which code signal combinations
respresentative of the identity of a called station
Also included in the structure is a case shift
a manner to withdraw latch 21 from power slide
28, thus permitting slide 28 to be moved up
wardly by key operating lever 25, which at the 10
same time will depress a multi-code key lever 29.
Pivoted on key lever 29 is an operating latch 30»
adapted to operate a multi-code normal latch
3| in response to movement of key 29 to release
rocking lever 32' which carries pawl 33 operating
upon teeth of ratchet wheel 34 through pawl
tooth 35. Retaining latch 36 engages normal
latch 3| to retain key 29 in its ‘operated position
independently of lever 25. ‘Key lever 29 engages‘
may be transmitted in response to depression of a
key at a remote controlling station.
A feature of the invention is the provision of code latch control bar 31 which in turn engages
mechanism for locking all keys in a keyboard con ‘ all code latches 3 and restrains them from inter
fering with the operation of code levers 4 when
taining a key e?ective for each depression to
code drum 39 controls levers 4 by reason of off
transmit code signal combinations so that dur
normal positions of code drum 39 attained as a
ing the time interval required for the transmis
sion of such plurality of code signals, the opera
tion of any other key will be prevented.
A better understanding of the invention may be
had from the following description, taken in con
their operation is as follows:
A plurality of key levers i each having a key
50, comprising a keyboard sufficient to transmit 30
printing telegraph apparatus for-sending and re- _ severally letters of the alphabet, ?gures, and
other characters are provided in the manner of
~ceiving auxiliary messages.
The operating parts of a structure according any telegraphic transmitter, and to this assembly
of single-code key levers is added according to
to this invention comprise a keylever l control
this invention the multi-code key lever 29. Each 35
ling a set ‘of ?ve code bars 2, each of which con
trols one of a set of ?ve code latches 3 which in of the single code key levers i engages directly
turn latch or leave operable individually ?ve code ?ve code bars 2 none of which is directly engaged
transmitting levers 8. A plurality of key levers, by the multi-code key lever 29, and by the depres
such as I, engage a universal bar 5 connected to sion of any key lever B the code bars 2 are set lon
a pull bar 6 having a hook end engaging a bell gitudinally in sliding manner to right and left in 40
crank lever l which inturn engages a clutch trip code combinations, thus operating the ?ve code
latches or contact controlling members 3, pivoted
lever 8. Clutch trip lever 8 controls the engage
at 5! so that a code bar 2 positioned leftwardly as
ment of clutch l0 through which power is com
viewed in the ?gure will rotate its associated code
municated from~ power shaft 9 to drive start
stcp shaft I I which carries cam barrel l2 adapted latch 3 clockwise to disengage its upper end from 45
to relcase serially the ?ve code transmitting levers its corresponding code transmitting lever 4 while
4 and thereby to control in code manner ?ve code code latches 3 positioned rightwardly at the lower
transmitting contacts l3. A latch lock bail I4 is end and leftwardly at the upper end will engage
biased by a spring 43 and is controlled by a latch respectively their code transmitting levers 4_ to
lock cam [5 on shaft II and controls a rocking prevent operation thereof by cams of cam barrel 50
bar l6 which, through a bell crank lever IT, con
l2, thus setting up a. combination of elements
trols a sliding bar 18 which normally blocks the adapted to transmit a‘ code signal from code
path of movement of a pull bar stop member 2| to transmitting contacts l3. Similar to the manner
hold .it out of the path of pull bar 22. Sliding bar disclosed in U. S. _Patent No, 1,965,572 issued to
I8 when operated is engaged by latch l9 and thus C. W. Burcky et al. (having special reference to
junction with the accompanying drawing where
30 in is shown an expanded perspective view of
result of step-by-step rotation of code drum shaft 25
38 by its ai?xed ratchet 36. Further detail of the
operating parts together with the manner of
Simultaneously , with the operations just de
I also will engage and depress universal bar 5 ' scribed and while the ?nger. of the‘ operator still
Fig. 6 of 'the patent) depression of any key lever
holds key 60 depressed, clutch ||l begins the move
rocking itupon its pivot 52 so that throughits
connection at 49 it pulls the pull bar 6, whose
ment of shaft H which rotates cam |5 to release
the latch lock bail l4 pivoted at 11 whose coun
terclockwise motion under the action of spring 43
hook end 53 rotates bell crank ,1, upon its pivot 54 ‘
t and lever 6 ‘by a lug 55 engages a ?xed member
56 which imparts a downward motion to, bar 6 releases rocking lever 32 whose spring 18 rocks
and disengages hook 53 from bell crank lever ‘I, the lever 32 upon its pivot 19 to‘lift pawl 33 which
thus liberating bell crank '| to‘return to normal' steps ratchet 34 and'cam 13, thereby stepping the 10 under tension‘ of spring. 51. This momentary ‘cam notch of cam 13 out of alignment with the 10
; action of bell crank ‘I has caused a similar action tooth 12 of normal latch 3| and estopping the re
turn of latch 12 into normal position until such
in clutch trip lever 8 pivoted at 58 which mo
mentarily has removed its clutch engaging'?nger . time as cam 13 shall have traversed successive
59 from clutch l0, permitting clutch ID to engage '_ stepsto complete its cycle of rotation into its nor
15 its two members together whereby power shaft 9 ‘ mal position.
The face of cam 13 now holds nor
begins rotation of start-stop ‘shaft ||.' Both of mal latch 3| locked, which. in turn holds retain
parts ‘I and 8 are restored by spring 51' while uni- _ ing latch 36 and ‘thereby holds key 60 locked in
versal bar 5 and pull bar 6 also are restoredby a ‘ depressed position vuntil code drum shaft 38 shall, '
have; completed: a full cycle. The actions de-.
spring not shown. The start-stop shaft || ro-‘
scribed since. depression of key 60 by the operator,
20 tates once and transmits a code signal of. im- '
havetaken place, almost simultaneously, and the
such levers 4 as are not restrained by latch13, operator’s ?nger now is’not required further upon
and at the‘ end of one cycle of rotation, ?nger 59 key 60. 3 It will be noted that the locking of key
again is engaged by clutch I0 and. causes‘ clutch ' 60, downward :i'has locked extremity 63 upward,
pulses by contacts |3 controlledin code manner by
25 |0 to disengage its members from each other,~ which has locked bar 31' outward or rightward,
thereby stopping stop shaft ||.
The code thus . ;
and which
inturn locked the ?ve code latches
transmitted'to line is effective upon a remote re- . '3 in clockwise position and has locked the ?ve
ceiver having a case shift member 23 responsive ._ code bars 2 in their left-hand positions so that no
to aspeci?c predetermined code, and having a' , .key' _| ‘canbe depressed since the inability of code
pull bar 22 also responsive to another'predeter .bars _2 to‘ yield to any key lever |_ will estop all ,
. mined code if that pull bar 22 is not obstructed... key levers I from depression, and the operator
by stop member 2-|.. Other codes operatetype ‘ having depressed key 60 is in turn estopped from
.bars and function imembersinthe‘. printer at
the responsive station.
depressing any key | to interfere with signals in - v
the line during the extended period of transmis
The description abovediscloses the operation sion-responsive to key 60 until that period of
of a single-code key lever'l and thevvresultant' transmission is completed.
Transmission of the plurality of codes now‘ pro-1
transmission to a, line circuit ofa single code‘
under control of cam‘ barrelv l2 in response to :a coeds as follows: With trip lever 8 locked in
clockwise position,‘ shaft 9 rotates shaft II and
Operation of the multi-code key lever 29 ‘re
cam barrel |2 continuously by means of clutch Ill
by operation of the same contacts |3 but under
and operates levers 4 cyclically and in repeated
cycles, the coded nature of the repeated cycles
control of cams or contact controlling members -
being determined, by the control-blocking or non
sults in. transmission'to the same line channel
on code drum shaft 38 in response to key lever , blocking of thelevers 4 by cams in the code drum
j 39 in lieu ofthe control-blocking by latches 3..
ual depression of key 60 rocks key lever 29 upon Ateach revolution of shaft ||, cam l5 lifts and
its pivot 6| againstthe biasing action of spring lowers bar “(which rocks rocking lever 32, which
40 and lifts the extremity 63 which engages arms‘ ‘by pawl 33-steps code drum shaft 38 one step
64 and 65, operating bell crank lever -'I by means ‘ vto presentv a succeeding set of cams upon code
50 of arm 65 to trip clutch ID in manner similar to
drum 39 to control the levers 4. When the entire
that above described, with the further provision series of codellsi'gnals has been transmitted, the '
last rocking movement 'of lever 32 will step code
that members ‘| and 8 are retained in their oper
drum shaft '38 into normal position, and at the
ated position so that ?nger 59 will not be en
gaged by clutch III in its successive rotations. end of the'last code, cam l5 will lift bar I4 to
5.5 Also, arm 64 operates bar 31 pivoted at 66 to move rock the lever 32 counterclockwise, whereupon
bar 31 against the upper ends of all code latches tooth 12 being opposite the notch vofcar'n ‘l3 and
45 29 instead of under control of latches 3. ‘ Man
the left-hand end of lever 32 now being below
3,.thereby disabling all code latches 3 from con
trol of code transmitting levers and also moving tooth 14 of ‘normal latch 3|, the normal latch 3|
under tension of its spring 8| will resume its nor
all code bars 2 to their left-hand operating-posi
positlonas shown, thereby releasing retain
tions, although as herein disclosed, these bars
may not be directly engaged by key lever 29.. Key ing latch 36 and releasing key lever 29, permitting
lever 29 also by its downward movement at the key Soto rise under the in?uence of spring 40,
left-hand side of'its pivot 6| draws member \8
thereby. depressing the extremity 63 and permit
on operating )atch 30 into engagement with
, ting arms 64 and 65_to fall, the action of arm 65
65 member 69 on normal latch 3|, thereby rocking
the latch 3| on its pivot ‘I I, withdrawing tooth 12
of latch 3| from cam 13, and withdrawing tooth
14 of latch 3| from rockinglever 32» Latch 36'
pivoted at 16 upon key lever 29 now is operated by
70 its spring 15 to move its upper portion 4| into
a notch 42 on the lower end of normal latch 3|
whereby key lever 29 is mechanically locked in its
depressed position and will remain so locked as
long as normal latch 3| remains rotated counter
75 clockwise as described.
permitting operation of clutch trip lever 8 by its
spring 51 to pass clutch engaging ?nger 59 into
engagement with clutch In to disengage power
shaft 9 ‘from start-stop shaft | |, thereby stopping
the shaft ||.
The fall of arm 64 has removed bar
31 from code latches 3, thereby unlocking code 10
bars 2 and keys |.
~ During this operation at the transmitting sta
tion, the operation at the receiving station has
been'normal in all details with the printer re
sponding to the several codes serially sent, in the
same manner that it would respond to the ‘same
‘ associatedwith lever 25, and functions as a means
for restoring lever 25. Upon the immediately sub
sequent depression of power ball 20, the pull bar
mitters of the nature herein considered to provide, ' 22 is urged downwardly by its spring 88 to release
a key I for each possible combination in the sys-'-' the rocking lever 26, and power slide 28 is de
tem of codes for which the transmitter is being pressed by bail 20 to engage end 95 of key op
used. To such a keyboard this invention adds a erating lever 25, whereupon latch 21 by a spring
45 reengages its notch in slide 28, thus locking the
multi-code key 60 to transmit upon each opera
tion thereof a plurality of code signals which slide in its ‘depressed position and locking the key
10 necessarily therefore must be selected among the operating lever 25 in its position shown. The 10
code signals for which individual keys already complete operating cycle of code drum 39 now
codes if sent by successive depression of a plurali
ty of keys I. It is customary in telegraphic trans
have been provided.
In providing for the transmission of station
identifying signals responsive to code signals re
16 ceived over a transmission line, the structure of
this invention uses the equipment already pro
vided and described above for the transmission of
the multicode message by a single multi-code
key and accomplishes this result by provision of
apparatus to depress key 60 automatically and
mechanically in response to the receipt of a pre
determined code signal or of a plurality of code
signals in predetermined order.
It is well understood that type printing tele
graphs using type bars and pull bars for op
erating type bars are provided‘ normally with
signal responsive notched code bars which joint
ly select a single pull bar which then may be
operated by a motor driven power bail. Such a
pull bar is shown at 22 and such a power ball is
shown at 20.. In such receiving printers there is
provided also a case shift member which assumes
one mechanical position in response to a single
code signal and retains that mechanical posi—
tion throughout transmission of all code signals
intended to print letter characters, then changes
its mechanical position in response to a single
code signal and retains the changed position
throughout all codes intended to print ?gures
and characters. Such a member is shown at 23
and it is shown in its “letters” or unshift position.
In response to “?gures" or shift code signal,
the member 23 changes to its downward position,
takes place, as described above for transmission
under control of key 60 when manually depressed,
and at the end of that complete operating cycle,
the key 60 is unlocked as before, It will be noted 15
too, that keys I are locked‘ against operation in
the same manner‘ and for the same reasons set
forth in connection with the manual operation of
key Bil so that the cyclic transmission controlled
by code drum 39 may not be mutilated by any‘ 20'
key I.
By the operation of the two keys at any sta
tion; namely, “?gure shift” and “who-are-you,”
the transmission of line signals causes a response
in the receiving magnet of the inquiring station 25
aswell as inthe receiving magnets of the remote
ly connected station. It is desired in this in
stance that the remotely connected station should
respond with its identi?cation signals but {that the
signature sending mechanism at the home sta 30
tion should not respond, thus leaving the home
station printing apparatus responsive to revert
ing control by the remotely connected station.
It will be noted in such an instance that the op
eration of the “who-are-you” key at the ‘inquir 35
ing station results in the rotation of shaft II,
While the reception of the “who-are-you” code at
the remotely connected station does not result in
the rotation of shaft I I. Advantage is taken of
this distinction to permit the remotely connected 40
station and non-rotated shaft II to respond to ~
the “who-are-you” signal and to prevent the in
quiring station with its rotated shaft II from re
For this
thereby permitting spring 85 to rock a code shift _ sponding to the “who-are-you" code.
latch 24 upon its pivot 96 to withdraw its tooth
82 from engagement with the key operating lever
25, thereby unlocking lever 25 to be responsive to
its spring 81 subject to the unlocking of power
slide 28 by latch 27 in response to rotation of pull
bar rocking lever 26 by pull bar 22. Members 23
and 24 have been operated in response to a re
ceived code signal for “?gure shift,” a received
code signal identi?ed with pull bar 22 will cause
the response of code bars I05, in the manner dis
55 closed in U. S. Patent No. 1,745,633 issued to S.
Morton et al., to select lever 22 and release it
for operation by its spring 88~ into position to,
be engaged by power ball 20. Pull bar 22 ac
cordingly moves into path of power bail 22, is en
60 gaged by a rising movement of power bail 20, and
is drawn upward, thereby rotating rocking-lever
26 and depressing arm 9| of latch 2'I, withdraw
ing the tooth of latch 2‘! from power slide 28
which is a member sliding upon two studs at 92
65 and 93 and which is engaged and depressed by
power bail‘ 20 in the depressed or downward po
sition of that power bail. Power ball 20 being
now in elevated position and slide" being now
unlocked by latch 21, the spring 8‘! acts to rock
70 the key operating lever 25 upon its pivot 86 to
depress key 60 and to rock the lever 29, which
acts as above described to trip the clutch I0 and
to set the cam 13 off normal so that key lever
29 becomes locked with key 60 in depressed posi
Slide 28 has been lifted by spring 81
75 tion.
purpose parts I6, Il, I8, 59, and'2I are provided. 45
Upon the operation of any key I clutch It
operates and starts the shaft II which operates
cam I5 to operate bail It which permits the
lever It to rock upon its pivot 96 under the in
?uence of spring M to rotate in turn the bell 50
crank lever I? clockwise upon its pivot 97 to
move the slide It forward, whereupon spring ,
I02 connected from latch I9 to frame of the
printer urges latch I9 to rock upon its ?xed
pivot 28 to engage a shoulder on slide it to re
tain slide IS in its withdrawn ,or forward posi
tion so that lug IIlI on pull bar stop member 2i
will not be estopped from vertical movement
by the end of slide bar I8. Lug Hi2 of member
2I is engaged and depressed by power bail 20 60.
against tension of spring I23, but since the
latching. of bar 68 by latch Hi, the rising of pow
er bail 22 will permit stop member 2i to rise
into position to block the selective movement of
pull bar 22. Selector code bars I95 now align
their notches in code combinations, to select the '
pull bar 22 both at the inquiring station and
likewise at the remotely connected station, but
at the inquiring station the'operation of mem 70
ber 2i presents lug I04 in front of the end I06 of
pull bar 22 so that pull bar 22 is estopped from
responding to the code bar selection at the in
quiring station, whereas at the remotely con
nectcd station members I6, I1, l8, I9, and 2| 75
have not been operated and pull bar 22 is not
estopped from responding to the code ‘signal.
It follows then that at the remotely connected
station there is a response of pull bar 22,.rock
nal representing a single character in response
to one operation of one of said keys, 9. further
key, mechanism set into action by said further
key to transmit a plurality of said code signals
representing a plurality of characters in' re
sponse to one operation of thekey, and signal
‘quiring station the operation of stop member ing mechanism responsive to a received code
2| causes pull bar 22 and accordingly lever 29 to signal and controlling also the setting of said
remain unoperated. 7At the return movement of mechanism into action.
6. In a telegraph transmitter, a plurality 01'
10 power bail 20, its engagement withlug I02 re- '
stores member 2| to its lower position ‘against character keys, means to transmit a code signal
the- tension of spring I03. While in its’upper representing a single character. in response to
position, lug [0| has engaged latch l9 and has one operationof a key, a further key, means to
transmit a plurality of code signals represent
lifted the tooth of latch I_ 9 out of- engagement
15 with the shoulder of slide bar ‘l8, permitting ing a plurality of characters in response to one
slide bar I8 to move slightly to engage lu’glnl operation of said further key, and mechanism
under power of spring I01, and thenby descent‘ ' controlled by said further key to lock said char
acter keys continuously during the extended
into its lower position lug I02 has removed it
self from the path of slide bar [8, and slide bar " period of transmission of a plurality ofcode sig
20 I8 again takes its normal or rearward position, nals representing a plurality of characters.
ing lever 26, latch 21, key operating lever 25,
and multi-code key lever 29, whereas at the in
thus all parts are again normal. in the inquiring
I, '7. In a telegraph transmitter, single charac
station and the inquiring station is in concli-‘~~v ter key levers, means including code latches and
tion to be fully responsive to the multi-code' _code bars responsive to operation of one of said
signal which the remotely connected station now single-character key levers and effective to look
25 has been conditioned to send.
It. is obvious that this invention‘ may be ap-v
plied in variant manners to automatic telegraph
transmitters and receivers of variant designs.
Therefore the appended claims are not intended.
30 to be limited by the specific design here shown
all others of said single-character key levers, a
multi-character key lever, and further means
including said code latches’and said code bars
and responsive to operation of said multi-char
acter key lever and effective to look all of said
single character key levers.
_8. In a. telegraph transmitter, single-charac
which. is applicable to a speci?c transmitter»
and receiver but are intended‘ to embrace the ter keys, a multi-character key, means respon
' .full range of equivalents when this invention is sive to operation of said multiJ-character key
and effective to transmit a plurality of code sig
modi?ed in mechanical interpretations to con
and to lock said single-character key levers,
35 iormv-to other types of automaticv telegraph ma nals
and vfurther answerback means responsive ‘to a
-What- is claimed is: '
1.111 a 'telegraph'tra'nsmitter, a-plu'rality of
character keys, means common to said‘keys to. .
received 'code signal and including said‘ ?rst
mentioned means.
9. In a telegraph transmitter, a plurality of
40 transmit a code- signal; representing'a single: single-character key levers, a plurality of code: 40
character in responseto one operationot a‘ key, bars controlled directly by said key levers for'
a further key, and means cooperating with said . transmitting» a single code signal in response tov
means to transmit a ‘plurality of wcode signals‘ operation of one of said single-character key le
vers, a multi-character key lever, and means
adapted. to transmit a plurality of codesignals
v>2. In a telegraph transmitter for operation .. representing a plurality of characters in response
at a station in-a telegraph »systeni,.va plurality. toaone operation of said multi-character'key lever ,
of character keys,‘ means to transmit‘one ‘codef 1, "andjindirectly controlling said code bars for lock
‘representing a plurality oi , characters .1 in: re;
v45 sponse to one operation of, said further'key."v
signal representing 'a‘vsingle” character in tree L
ingpurposes only.
w 0. In a telegraph transmitter, a plurality of 60'
to one
to operation
transmit a‘plurality
of a' key, a' oivcodesig-g
further key, single-character key levers, a plurality of con
‘nals in response to'one operation-of said fur-'1 tacts associated with individual operating levers
ther key, said pluralityfof‘ code signals repre-, and a common transmission circuit, a plurality of
contact-controlling members controlled by said
‘single-character key levers and controlling said 65
V 3. In a telegraph,_,transmitter, a plurality of ‘contacts to transmit asingle code signal in re
~_ senting a plurality of characters identifying said
character keys, means to transmit code signals‘
each representing a singlecharacter in response
to one operation of a ,key,»a further key, and
60 means to transmit a plurality ‘of said code sig
nals representing a, plurality of; characters in
‘response to one operation of ‘the further key.
4. In a telegraph machine, a/selecting mech
anism, an operating element~se1ectable by said
65 mechanism,
a transmitting mechanism for
transmitting code‘combinations of impulses, a
manually operable key lever, means actuated
upon the operation of said key lever to cause
said transmitting mechanism to transmit a plu
70 rality of code combinations, of impulses, and
means associated with said element and said
key lever to operate said key lever in response
to operation of said element.
5. In a telegraph transmitter, a plurality of
75 character keys, means to transmit a code sig
sponse to operation of one of said single-char
acter key levers, a multi-character key lever, and
a plurality of further contact-controllingmem
bersjcontrolle'd by said multi-character keylever
‘and controlling said contacts to transmit a plu
rality' of code signals representing a plurality of
characters in response to one operation‘of said
multi-character key lever.
- 11. In a, telegraph transmitter, a plurality of
single-character keys, a continuously operative
power shaft, a start-stop member, a clutch-con
necting said shaft and said member, a clutch con
trolling member, a clutch operating member con
trolled by one of said single-character keys and 70
e?‘ective to operate said clutch controlling mem
ber during a time period less than the time of one
revolution of said start-stop, member, a multi
character key, and a clutch operating_ member
controlled by said multi-character key and effec
tive to operate said clutch controlling member; said key lever and eifective to operate said key
during a time period greater than the time of - lever as a result of operation of said power driven
part, and an interfering member controlled by -
one revoltuion of said start-stop member.
12. In a telegraph transmitter, a plurality of
contacts associated with a transmission line, v.a
set of single-code contact-controlling members, a
_ set of multi-code contact-controlling members,
said key lever and associated mechanical parts
and e?ective when sov controlled to engage said
power driven member in a manner to disable said
member for a limited time from response to said
and a further control member associated with
code signal.
said multi-code contact-controlling member and
1'7. In a telegraph transmitter, a plurality ofv
transmitter keys, a pull bar, a further transmitter
10 operable jointly therewith and effective to dis
able said set of ‘single-code contact-controlling
13. In a telegraph transmitter, a motor, a ro-v
tary code signal transmitting member driven
15 thereby, a rotary code signal control member, a
driving pawl for said control member and oper
jable ‘by said transmitting member to drive said
‘control member in stepping manner at each revo
lution of said transmitting member, a key‘and
2,0 mechanical parts operated thereby to start said
transmitting member and thereby said control
key mechanically associated with said pull bar
and controllable thereby, and a member mechan
ically associated with said plurality of keys and
operable thereby to engage said pull bar to estop
operation of said pull bar.
18. In a telegraph transmitter, a key, power
members associated with said key for operating
1 said key in response to a predetermined code sig
nal when received, a further key and mechanical
parts and electrical contacts associated therewith
for completing said predetermined signal, and a
member, a latch engaging said key parts to hold ' mechanical member associated with said further
said key in depressed position, and a cam on said key and effective under control of said further
control member engaging said latch to control
said latch to retain said key in depressed position
while said control member is in any code signal
key to prevent operation of said ?rst mentioned
key in'response to said further key.
19. In a telegraph apparatus having a trans
mitter and a receiver, a rotary signal-generating
14.- In a telegraph transmitter, electrical trans
member in the transmitter, a cyclic mechanical
mitting contacts, operating members for said con-v member in the receiver, means in- said receiver
30 tacts, key controlled latchesengaging said oper
operable in response to signals generated by said 30
ating-members in code manner, a multi-code con
rotary member, a selectable member controlled by
troller also engaging said operatingmembers in said means in said receiver and operable by said
controlling position.
code manner, and a multi-character key and as
sociated mechanical parts engaging said multi
35 code controller to start said controller into rota
tion and engaging said key controlled latches to
prevent them from engaging said operating mem
15. In a telegraph transmitter, multi-code
40 transmitting mechanism, a key engaging said
mechanism and operative when depressed to start
said mechanism into automatic operation, a lever
engaging said key to depress said key, case shift
mechanism, and a latch operated by said case
45 shift mechanism and effective to restrain said
lever whenv said case shift mechanism is in one
case position and to clear said lever when said
case shift mechanism is in another case shift po
16. In a_' telegraph transmitter, a motor shaft,
electrical signal transmitting contacts, a manual
' cyclic member following its selection, and means
to prevent operation of‘said selectablemember
settable by said rotary member and restorable 35
by said cyclic member.
20. In a telegraph apparatus, a transmitter, a
‘ receiver, a mechanical member in said receiver.
means in said receiver operable in response to sig
nals generated by said transmitter, a selectable
member controlled by said means and operable by
said mechanical member following its selection,
and means to prevent operation of said selectable
member settable by said transmitter and restor
able by said mechanical member.
21. In a response-signal telegraph apparatus, a
transmitter, a response-asking key in said trans
mitter, means in said transmitter operated in ac
cordance with the operation of said key for trans~
mitting signal impulses, a receiver, a response 60
key and a key lever and associated mechanical controlling selectable member in said receiver,
parts engaging said contacts and controlling said - means in said receiver responsive to said impulses
contacts and said motor shaft to transmit in
55 code manner whenv said key lever is operated,
a power driven member and associated mechani
cal parts responsive to a predetermined received
, for selecting said member, a mechanical member
settable by said response-asking key for ob
structing operation of said response-controlling
code signal combination of electrical impulses to
selectable member, and means in said receiver for
restoring said mechanical member to its normal
cause said motor to drive said member, mechani
60 cal parts engaging said power driven member and
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