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Патент USA US3036165

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May 22, 1962
F. c. MOEBIUS
3,036,155
NON-REPEAT AND SIGNAL ASSURANCE MECHANISM FOR
PRINTING TELEGRAPH APPARATUS
Filed July 11, 1960
'
3 Sheets-Sheet 1
ION
org
N
FIG.
FIG.3
~<—L
INVENTOR
FREDERICK C. MOEBIUS
BY
‘
ATTORNE
May 22, 1962
F. c. MOEBIUS
3,036,155
NON-REPEAT AND SIGNAL ASSURANCE MECHANISM FOR
PRINTING TELEGRAPH APPARATUS
Filed July 11, 1960
5 Sheets-Sheet 2
NQ
:12
$5
INVENTOR
FREDERICK C. MOEBIUS
BY @F
ATTORN Y
May 22, 1962
F. c. MOEBIUS
NON-REPEAT
FRI
Filed July 11, 1960
3,036,155
D SIGNAL ASSURANCE MECHANISM FOR
NG TELEGRAPH APPARATUS
'
5 Sheets-Sheet 5
INVENTOR
FREDERICK C. MOEBIUS
BY @Q. %¢
ATTOR EY
States
1
3 036 155
NON-REPEAT AND SI’GNAL ASSURANCE MECH
ANISM FOR PRINTING TELEGRAPH APPA
RATUS
Frederick C. Moebius, Barrington, Ill., assignor rto Tele
type Corporation, Chicago, Ill., a corporation of Dela
ware
Filed July 11, 1960, Ser. No. 41,870
5 Claims. (Cl. 178—-17)
,.
IQQ
7
3,035,155
Patented May 22, 1962
2
operations per minute or 350 words per minute. Upon
such successive key operation, many presently known
non-repeat means can, upon becoming eifective after the
transmission of the ?rst signal in response to the ?rst
operated key, preclude the transmission of the second
signal in response to the second operated key thereby
causing a skip or omission of a wanted character or
signal. Ovbiously, the possibility of such an ommission
is extremely undesirable.
Accordingly, the object of this invention is to provide,
10
This invention relates to telegraph transmitters in
in
combination, a non-repeat mechanism for precluding
general and in particular to a non-repeat mechanism in
the repetitious transmission of a signal upon the sustained
combination with a subsequent signal assurance mech
operation of a key and a second signal assurance mecha
anism for keyboard controlled telegraph transmitters.
nism ‘for assuring the transmission of a second signal in
Keyboard controlled telegraph transmitters of the type 15 the event of the operation of a second key upon the
disclosed in US. Patent No. 1,595,472, granted August
completion of the transmission of the ?rst signal but
10, 1926, to H. L. Kru-rn and Patent No. 1,766,713
before the non-repeat means becomes effective to preclude
granted June 24, 1930, to E. E. Kleinschmidt, which
initiation of another cycle of said cyclically operable
patents are hereby incorporated by reference as if fully
means.
reproduced herein, generally include a plurality of keys 20' A feature of the invention resides in the addition of a
operable to set a plurality of code bars in accordance with
a code, e.g., the well known ?ve unit Baudot code. Op
eration of any key is also e?ective to operate a control
non-repeat means for limiting the operation of a cyclical
ly operable means to a single cycle of operation upon the
sustained operation of a key and a control lever engage
instrumentality or universal bar, such as bail 62 or
able by said non-repeat means for assuring the initiation
clutch control bar 410 shown in the incorporated patents, 25 of a second cycle of operation of the cyclically operable
respectively, which is operable to engage a clutch to trans
means in the event of the operation of a key substantially
fer rotative power, provided by a motor, to a set of cams
upon completion of a cycle by said cyclically operable
which, through intermediate members, sense the permuta
means but before the non-repeat means becomes effective
tive setting of the code bars. Signal producing means, one
to preclude initiation of another cycle of said cyclically
or more sets of contacts, are selectively opened and closed
by the rotating cams through other intermediate mem
bers to produce a signal in accordance with the permuta
tive setting of the code bars and corresponding to the
character represented by the operated key.
Since the signal producing means operate at a ?xed
speed determined, of course, by the speed of rotation of
the motor, usually at. speeds to produce 360, 450 or 600
operations per minute, ‘and since to produce a signal in
operable means.
A more complete understanding of the invention may
be obtained from the following detailed description when
read in conjunction with the appended drawings in which:
FIG. 1 is a plan view of the transmitter;
FIG. 2 is an irregular sectional view taken substantial
ly along the line 2——2 shown in FIG. 1 and in the direc
tion of the arrows;
FIG. 3 is an irregular sectional view taken substantially
response to every depression of a key the number of
along the line 3-3 shown in FIG. 2 and in the direction
operations of the keyboard per minute must not exceed 40 of the arrows;
the maximum possible number of operations per minute
FIG. 4 is an enlarged fragmentary View, taken from
of the signal producing means, means must be provided
FIG. 2, showing the illustrated elements in greater detail;
to preclude the transmission of more than one signal
FIGS. 5 through 8 are fragmentary views, taken from
upon the depression of a key for a time greater than that
FIG.
2, showing the positions the illustrated elements
required by the transmitter to produce and transmit one 45 occupy during an operation sequence; and
signal, otherwise, the transmitter could possibly trans~
FIG. 9 is a sectional view taken along the line 9—9
mit the same signal more than once upon a single key
shown in FIG. 5 with some elements shown in phantom.
depression. The operation or depression of a key for
Referring now to the drawings and more particularly
a greater time than required to transmit a single signal
to FIG. 1, there is shown a plurality of key levers ll, cor
shall be referred to hereinafter as sustained operation or
responding to the key levers 13 of keys 17 shown in the
depression. And, it will be appreciated, that since the
keyboard, in all likelihood, will be operated at as many
different speeds as there are operators, the relative timing
?rs-t mentioned incorporated patent or key bars 399 shown
in the second mentioned incorporated reference, which
span a plurality, ?ve in number, of code bars 12 and a
between the speed of operation of key and the signal pro
control instrumentality or universal bar 13. The bars are
ducing means will be compounded.
55 supported for longitudinal movement, the right end of each
The limitation of the transmission of a single signal
bar being provided with a hook like portion 15, as may
upon the sustained operation of a key is accomplished
be seen in FIG. 2, which encircles partially a shaft 17 and
by the employment of instrumentalities, known in the
the
left end, it will be understood, being supported in any
art as non-repeat means, which disengage the clutch
suitable manner, as for example, by the roller 23 shown in
after a single cycle of operation of the signal producing 60 FIG.
2 of the incorporated patent of H. L. Krum.
means and, hence, operate the clutch in single cycle
In the manner well known in the art, the code bars 12
fashion. The provision of the non-repeat means, how
are adapted to be set permutatively in accordance with
ever, frequently introduces another problem. Operators
the familiar ?ve-unit Baudot code. Upon the depression
are generally said to operate the keys at 240, 300 or
of any key representing a character, the associated key
occasionally as high as 450 operations per minute (op 65 lever
11 is moved downwardly into engagement with the
erations per minute are converted to words per minute by
cam lugs 14 of the code bars 12, and the code bars corre
sponding to the elements which are marking in the char
that the operator averages such speeds over a given period.
acter, as represented by the Baudot code, are cam-med
And an operator who is averaging only 240 operations
to the right; the code bars which correspond to the ele
per minute, or 40 words per minute, can, upon the suc 70 ments which are spacing remain to the left.
cessive operation of two keys with ?ngers on opposite
Mounted pivotally on the universal bar 13, FIG. 4,
hands, attain a relative or instantaneous speed of 2100 - are a non-repeat lever 20 and an universal bar extension
dividing by 6) however, what is really being said is
3,036,155
3
21; the lever and extension being mounted on shafts 22
4
' transfer member 1118.
The bail 114 is urged counter
clockwise by a spring 119 into engagement with the right
and 24, respectively, secured in any suitable manner to
the universal bar. A spring 28, attached to a laterally di
rected portion 29 formed on the non-repeat-lever, urges
the lever in a clockwise direction and a stud 317, secured
ends 120 of the cam followers 31 to 85, inclusive. Also
mounted pivotally on the shafted is a rocker member
122 which includes a pair of abutments 124 and 125 and
suitably to the universal bar 13, arrests the clockwise
a pair of notches 127 and 128.
37 secured, suitabl , to the universal bar.
141. The fulcrum member ‘141 cooperates with a V
shaped notch 143 formed in a bracket 144 mounted in the
'
'
Connected pivotally at 131 to the rocker member 122
movement of the lever. The universal barrextension 21
is a link 132 which operates a contact assembly 134 con
is urged in a counterclockwise direction by a spring 33
tained in a housing 135. The upper end of the link 132
stretched between spring hooks 3'4 and 35 formed on the
extension and universal bar, respectively, and the counter 10 is connected to the stem 136 of a T-shaped contact lever
133 which engages pivotally at 140 a fulcrum member
clockwise movement of the extension is arrested by a stud
A generally U-shaped bracket 40, referring again to
housing 135. A spring 146, stretched between the bracket
example by welding, to the frame 44 and supports shafts 15 144 and the fulcrum member 141, urges the fulcrum mem
her in’ a clockwise direction about the V-shaped notch
46,747 (FIG. 2), 48 and 49. Mounted rotatably on the
‘ FIG. 1, having leg portions 41 and 42, is secured, as for
143 and urges the contacts 151 and 152 in engagement
with their associated contacts 153 and 154. Contacts
151 and 153 comprise a set of spacing contacts and con
with a gear 54 secured'to a motor shaft 55 of a motor,
motor 5 6 of the incorporated patent of H. L. Krum. Also 20 tacts 152 and 153 comprise a .set of marking contacts.
Since the pivotal:connection between the fulcrum member
mounted rotatably on the shaft 46 is a cam sleeve 58 com
141 and, the T-shaped contact lever 138'is located cen
prising a plurality of cams; bail reset cam 59, ?utter cam
trally ofthe lever, a balanced or equal pressure is exerted
60, helically arranged transmitter earns 61 to 65, inclu
with respect to each of the sets of contacts and the T
sive, and a stop-start cam-66. The flutter cam'60 is pro
vided with seven apices, one for each of the ?ve elements 25 shaped contact lever is said to be ?oating. In actual prac
shaft 46 are an integrally formed gear ‘50 and toothed,
member 51; the gear- 59 is meshed in driving engagement
of the Baudot code plus the start and stop elements and
each of the ?ve transmitter cams and the stop-start cam
are provided with one peripheral indentation; the six in~
dentations are arranged helically in the manner well
tice, the T-shaped lever 138-will be operated by the link
.132 to such a position that one set of contacts will be
closed.
Referring now to'FIG. '3, there is shown a member 157,
known in the art. A clutch member 69, formed integrally 30 mounted pivotally on the shaft 547, adapted to pivot with
the bail 7 6 and which member is provided with an indenta
on the cam sleeve 58, is provided with a projection 70
tion 158, encircling a reduced, portion .160 of the stud
' which supports a shaft 71 and mounted pivotally on the
79, and an upwardly and rightwardly directed portion 161.
shaft 71, is a clutch pawl 73, FIG. 2, which is urged'clock
Also, mounted pivotally on theshaft 47 is a control lever
wise by a spring 74 into engagement with the toothed
v164 which includes an abutment portion 165. Spring .168
35
member 51.
is stretched between the control lever 164 and the arm
A generally U-shaped bail 76, FIGS. 1 and 2, is
portion 161 and is su?iciently strongto pivot the control
mounted pivotally on the shaft 47 and is provided with
lever clockwise upon clockwise movement of the bail 76
a blade 77, a stop projection 78, 'a stud 79 and a cam
and is operable to permit relative independent movement
follower portion 81}. The bail 78 is urged counterclock
between the lever and bail.
‘ ‘ wise by a spring 89 and the counterclockwise movement
' of the bail is normally arrested by the universal bar ex
tension 21 which maintains the bail in the ‘position shown
in FIG. 2 with the stop projection 78 engaging and pivot
ing the clutch pawl 73 counterclockwise out of engage
ment with the toothed member 51.
'
A plurality of earn followers ‘81 to 85, inclusive
(FIG. 1), and start-stop cam follower 86 are urged by
individual springs 88 (FIG. 2) into cooperative engage
ment with the helically arranged transmitter cams 61 to
Operation of the Non-Repeat Means ,
The operation of the non-repeat means for limiting the
transmitter to the transmission of a single signal repre
senting a single character upon the sustained operation of
45 a key will now be set forth. It will be assumed that the
above described instrumentalities occupy the positions
shown in FIG. 2 and that the gears 50 and '54 and toothed
member 51 are constantly rotating. Upon the operation
of a key representing a character, the associated key lever
65, inclusive, and start-stop cam 66,‘ respectively. The 50 11 is moved downwardly into engagement with the cam
lugs 14 of the code bars 12 and universal bar 13. The
ends, as may be seen readily in FIG. 1, with code bar
universal bar '13, upon the operation of any key lever,
sensing arms 91 to 95, inclusive. The arms 91 to‘ 95
is invariably moved to the right and the code bars 12
inclusive, sense whether or not the code bars have been
which are marking in the character, as represented by the
moved to the right, if a ‘bar has been moved to the right 55 Baudot code, are moved ‘to the, right and the code bars
"downward movement of the associated arm is blocked
are said to be set permutatively. Upon the rightward
' cam, followers 81 through 85 are provided at their left
and counterclockwise movement of the cam follower is
precluded upon the presentation of the identation for-med
in the associated transmitter cam to the cam follower.
movement of the universal bar 13, the abutment 165 of
the control lever 164 engages the laterally directed por
tion29 of the non-repeat lever 21} and pivots the non
It will be noted that the left end of arm 96, FIG. 1, of 60 repeat lever counterclockwise as may be seen in FIG. 8
the start-stop cam follower 86 is shorter than the other
and, during a major portion of the rightward movement
arms 91through 95 for a reason to become apparent
of the universal bar, the universal bar extension .21 main
later.
.
tains the bail 7.6 in the position shown in FIGS. 2 and 5.
H A. flutterlever 161 and a detent arm 102, FIG. 2,
Continued rightward movement of’ the universal bar 13
I 1 having a. stabber portion 103 are mounted pivotally-on 65 moves the extension 21 out from under the blade 77 of the
the shaft 49 and are urged counterclockwise ‘by individual
bail 76 and the spring 89, as may be seen in FIG’, 6, pivots
springs 104 and 105, respectively. The lever 101 is
urged into cooperative engagement with the flutter cam
the ‘bail countenclockwise. The bail through the stud 79
, pivots the control lever 164 counterclockwise and the abut
.60and mounted pivotally on the flutter lever 161, is a »
'ment portion 165 is moved'downwardly out of abutting
[transfer member 163 ‘which is provided with an opening 70 engagement with the laterally directed portion 29 and the
spring 28 pivots the non-repeat lever 20 clockwise mov
169 and a pair of abutments 116 and 111.
ing the laterally directed portion '29 on top of ‘the abuts '
'
. Mounted pivotally on the shaft'48, as maybe seen
moot-165.
in FIG. 2 is an oscillatable boil'114 which is provided
.As thebail 76 was pivoted counterclockwise, the ‘stop
with a cam follower sensing blade 115 and a'projection
7' 1116 which’ is received in .the opening 109 formed in the 75 projection '78 was moved out of engagement with the
5
3,036,155
clutch pawl 73 and the spring 74 pivoted the pawl clock
wise into engagement with the toothed member 51 and
6
move the stop projection 78 out of the path of the pawl
73
and leave the pawl in engagement with the toothed
rotative power was transferred to the cam sleeve 58 and a
member 51 leaving the pawl 73 in engagement with the
cycle of operation was initiated. Upon the initial rotation
toothed member 51 would effectively initiate a second
of the cam sleeve 58, the indentation formed in the stop—
cycle
of operation even though the key has been operated
start cam 66 is presented to the start-stop cam folower 86
but
once.
However, since the non-repeat lever 20, upon
having the shortened left-hand portion as shown in FIG.
the movement of the control lever 164 below the laterally
1, and the cam follower 86 under the in?uence of its as
directed portion 29, was pivoted by the spring 28 into the
sociated spring 88 is pivoted counterclockwise (FIG. 2)
about the shaft 47. Since the left-hand portion of the 10 position shown in FIG. 7, the counterclockwise movement
of the bail 76 will be blocked by the non-repeat lever and
cam follower is shortened, the portion cannot engage any
the stop projection 78 will be presented for engagement
code bars and counterclockwise movement of the start
with the pawl 73 and, upon continued rotation of the cam
stop cam follower always occures upon the presentation
sleeve 58, the stop projection will engage the pawl 73 and
of the indentation of the stop-start cam to the follower
86. The right end 120 of the stop-start cam follower 86, 15 move it out of engagement with the toothed member 51
thereby arresting rotation of the cam sleeve. Hence
upon counterclockwise movement of the cam follower 86,
single cycle operation is achieved and only one signal
engages the cam follower sensing blade 115 and pivots the
combination will be produced upon the sustained depres»
oscillatable bail 114 clockwise against the tension exerted
sion of any key lever 11.
by spring 119. Through the interconnection between the
bail 114 and the transfer member 108, projection 116
Operation of the Subsequent Signal Assurance Means
being received in opening 189', the transfer member is 20
It
will now be assumed that a ?rst key has been oper
pivoted counterclockwise and, upon continued rotation
ated
and the above described cycle of operation has been
of the selector cam sleeve ‘58, an apex of the ?utter cam
initiated and is nearing completion, and it will be further
60 engages the transfer lever 101 and pivots the lever and
the transfer member clockwise moving the abutment 110 25 assumed that, at such time during the ?rst cycle of oper
ation that the instrumentalities occupied the position
of the transfer member into engagement with the abut
shown in FIG. 7, the operator released the ?rst operated
ment 124 of the rocker member 122. The rocker mem
key and depressed a second key with the hand opposite
ber 122 is pivoted clockwise about the shaft 48, in the
of the one which depressed the ?rst key. The code bars
direction of the spacing arrow 170, into a spacing position
and is detented in the spacing position by the engagement 30 12 were quickly moved to the left and again to the right,
but in a new permutative setting corresponding to the
of the stabber portion 103 with the notch 128. The link
second operated key, and the universal bar 13 and non
132 is moved downwardly upon the movement of the
repeat lever 20 were moved to the left and again to the
rocker member 122 into the spacing position and the T
right and occupy the positions shown in FIG. 7. With
shaped contact lever is pivoted clockwise about the pivot
out the inclusion of the control lever 164, it will be ob
al connection 140 and the set of spacing contacts 151 and
35 served that, upon the continued rotation of the reset cam
153 is closed, producing thereby a start impulse.
59, counterclockwise movement of the bail 76 will be pre
Upon continued rotation of the cam sleeve 58, the
cluded by the non-repeat lever 20 in the manner set forth
helically arranged indentations of the cams 61 to 65, in
supra and the projection 78 will pivot the pawl 73 out of
clusive, are presented sequentially to the cam followers
engagement with the rotating toothed member 51. Thus
81 to 85, inclusive. The code bars 12 which are spacing
and remain to the left and do not block the left-hand
ends of the cam followers, such as end 94 as shown in
FIG. 2, and the cam followers fall into the indentations
as did the start-stop cam follower 16 and a spacing signal
is produced by the closure of contacts 151 and 153. How
ever, upon the presentation of the indentation of a trans
40 a second cycle of operation will not be initiated even
though a second key has been operated and the code bars
12 have been reset in a new permutative setting.
The inclusion of the control lever 164 however, is
effective to initiate a second cycle of operation in re
sponse to the depression of the second key. It will again
be assumed that the instrumentalities occupy the posi
tions shown in FIG. 7 with the abutment 165 of the
12 is marking, i.e., moved to the right, the code bar will
control lever 164 being under the laterally extending
block the downward movement of the lefthand code bar
projection 29 of the non-repeat lever 20. Then, upon
sensing arm, for example, code bar 95 as shown in FIG. 2
and the cam follower is not permitted to fall into the 50 the release of the ?rst key, the code bars and the uni
indentation formed in the transmitter cam. The spring
versal bars will be moved to the left and the laterally
119 pivots the oscillatable bail 114 counterclockwise
extending portion 29 will be moved ?om over the con
which in turn pivots the transfer member clockwise and,
trol lever 164 and the spring 168 will pivot the control
upon the clockwise movement of the transfer lever 101
lever clockwise to the position shown in FIG. 8. As
by the ?utter cam 160, the abutment 111 of the transfer 55 the code bars 12 and universal bar 13 are moved again
member 108 is moved into engagement with the abutment
to the right, in response to the operation of the second
125 and the rocker member 122 is pivoted counterclock
key, the abutment portion 165 will again engage the
mitter cam to a cam follower whose associated code bar
wise in the direction of the marking arrow 171 into a
marking position and is detented in the marking position
laterally directed portion 29 and will again pivot the
non-repeat lever 20 counterclockwise, as shown in FIG.
by the detent arm 102. Counterclockwise movement of 60 8, and the downward movement of the bail 76 will not
the rocker member 122 moves the link 132 upwardly,
be blocked. The spring 89 will again pivot the ball 76
pivoting the T~shaped contact lever 138 counterclockwise
to the position shown in FIG. 6, the projection 78 will
about the pivotal connection 140 and the set of marking
not move the pawl 73 out of engagement with the toothed
contacts 152 and 153 are closed.
member 51 and a second cycle of operation will be ini
Toward the end of the cycle of rotation of the cam 65 tiated to produce a signal in accordance with the second
sleeve 58, the high peripheral portion 173, FIG. 7, of the
permutative setting of the code bars 12.
bail reset cam 59 engages the cam follower portion 80 and
Thus it is seen that upon every rightward movement
pivots the bail 76 clockwise about the shaft 47 presenting
of the universal bar 13, the control lever 164 is eifec_
the stop projection 78 for engagement with the pawl 73
tive to pivot the non-repeat lever 20 counterclockwise
and, since the control lever 164 is caught under the non 70 and successive cycles of operation will be initiated upon
repeat lever portion 29, the spring 168 will be elongated
subsequent operations of the keys. However, since the
and the control lever will remain under the projection 29.
downward movement of the bail 76 is operable through
The high peripheral portion of the reset cam 59 will be
the stud 79 to move the control lever 164 under the
rotated past the cam follower 80 and the spring 89 will
laterally directed portion 29 of the non-repeat lever20,
again begin to pivot the bail counterclockwise so as to 75 the non-repeat is rendered e?ective upon the sustained
3,036,155
8
depression of a key and, after the bail 76 has been
camrned upwardly by the reset cam 59, the downward
movementof the bail is precluded by the non-repeat
lever 2ft, as shown in FIG. 7, and only one cycle of
operation will be initiated upon the sustained depression
of any key lever 11.
>
The transmitter‘ is also provided with means to permit
the desired repeated transmission of a signal upon the
single depression of a key, viz., the repeat key lever
176 shown in FIGS. 4 and 8.
After the desired key has
beenoperated and the code bars 12 set permutatively,
the repeat key :lever 176 may be operated and, upon
beingoperated, the repeat key lever 176 engages the
a
said assurance means is latched by’latching means on said
non-repeat means.
2. In a telegraph transmitter, a plurality of permuta
tively settable code bars, a plurality of keys having normal
positions and adapted to be moved into a secondary posi
tion, each key operable to'cause a setting of said code
bars, a universal bar movable by the operation of any
key from an initial position into a secondary position
and being maintained in said secondary position during
the sustained depression of any key; signal producing
means for producing a signal in accordance with the per
mutative setting of said code bars,'cyclically operable
means for operating said signal producing means, a mov
non-repeat lever 20, as may be seen in FIG. 8, and pivots
the lever counterclockwise out of the path of the bail
76. Thus the bail 76, after being pivoted by the reset
cam 59'to the position shown in FIG. .7, will be moved
by the spring 89 to the position shown in FIG. 6 and
repeated cycles of operation of the cam sleeve 58 will be
ably mounted bail engaged by said universal barwhen in
pressed.
operable means, a non-repeat levenmovably mounted on
said initial position and positioned thereby so as to engage
and restrain said cyclically operable means against opera
ion, means for disengaging said hail from said cyclically
operable means upon movement of said universal bar to
the secondary position, means for returning said bail to
initiated as long as the repeat leveris maintained de 20 said restraining position after release of said cyclically
said universal bar and e?ective uponmaintenance of said
universal bar in said secondary position to hold said bail
upon return thereof to said restraining position to retain
said bail in position to again restrain said cyclically oper
25
forth. Referringagain to FIG. ,6, it will be noted, that
able means from operation and limit the operation thereof
after the universal bar 13 and‘extension 21Vhave been
to a single cycle, and a spring-urged assurance means '
moved from their initial leftward positions to the right
effective to engage said non-repeat lever and hold said
in response to the'depression of a key and after the bail
non-repeat lever out of restraining relation to said bail,
76 has been pivoted counterclockwise to engage the
clutch pawl 73 the bail blade 77 is interposed between 30 a holding .means to hold said assurance means in non
e?ective position when said non-repeat lever is effective
the extension 21 and the initial position of the extension.
to hold said bail in the restrained position, and means
Upon release of the depressed key, the extension 21
carried by said cyclically operable means to move said
pivots clockwise about the shaft 24 and permits the
assurance means against the urging of its spring into posi
.universal bar 13 to be moved to the left under the in
35
tion to be held by said holding means.
themes of the spring 28 before the bail 76 has been
3. In a telegraph transmitter, a plurality of manually
cammed .out of the path of the extension 21. Were the
voperable keys, a plurality of code bars permutatively set
extension 21 an integral part of the universal bar 13, it
table by each of said keys, :1 universal bar movable from
will be appreciated that the universal bar could not be
i an initial position to a secondary position by any of said
returned to the left until the bail '76 was cammed to
the position shown in FIG. 7, i.e., later in the cycle than 4.0 keys and restorable to said initial position only upon
release of the key signal generating means for generating
is possible with the inclusionrof the separate pivoted ex
signals in accordance with the setting of said code bars,
tension 21. Thus the universal bar extension 21 permits
cyclically operable means for operating said signal gen;
a “freer” keyboard and makes the release of the keys
cratingv means, a source of power including a rotating
more responsive to theremoval of the operators" ?ngers.
member, a clutch including a pawl normally urged into
The. earlier movement of the universal bar 13 to the left
engagement with said rotating member to connect said
permits the bar to be prepared for earlier movement to
power source to said cyclically operable means, a piv
the right in response to a successively depressed key there
The manner in which the universal bar extension 21
permits an early return of the universal bar 13 to the
left upon the release of a depressed key will now be set
otally mounted bail having a latching position and in
cluding a projection engageable with said pawl, a univer
ly illustrative of the invention and that many modi?ca 50 sal bar extension mounted pivotally on said universal
bar and effective when said universal bar is in'said initial
tions may be made therein without departing from the
position to engage said bail and’ maintain said bail in said
by giving a'lighter touch to the keys.
.
It is manifest that the preferred embodiment is mere
spirit and scope of the invention.
What is claimed is:
l
'
I. In a telegraph transmitter, a plurality of permuta
tively settable code bars, a plurality of keys each opera
ble to ‘set said code bars permutatively, a universal bar
latching position and said projection in engagement with
said'pawl to withhold said pawl from engagement with
said rotating member, said universal bar extension being
disengageable from said bail 'by movement of said univer
sal bar into said secondary position, means for pivoting
said bail out of, said latching position upon disengagement
ing means operable to produce a signal in accordance with
from said universal bar extension to disengage said pro
the permutative setting of said code bars, cyclically
,iection from said pawl to permit said pawl to engage said
operable means operable bythe operation of said univer (50 rotating member, means for returning said bail to said
sal’ bar to imitate operation 'of said signal producing
latching position after disengagement of said projection
7' operable by and in unison with any key, signal prdduc- '
means, a non-repeat lever mounted on said universal
from said pawl, a non-repeat lever mounted pivotally on
said universal .bar and spring-urged to block said bail
means to a single cycle of operation upon the sustained _
65 upon return of the bail to said latching position if said
bar and being operable to limit said cyclically operable
operation of saidruniversal code bar, a latch means on
saidnon-repeat lever, a movable assurance means opera
universal bar then remains "in said secondary position,
thereby to preclude a second cycle of operation of said
‘ble to prevent saidjnon-repeat lever from limiting the
a, cyclically operable means while said universal bar remains
cyclically operable means, engaging means on said as
in said secondary. position, an assurance means operable
70 to engagersaid non-repeat lever'and to pivot said non
repeat lever against the urging of its spring out of block
said assurance means in a non-effective position, and
surance means to engage said latching means to latch
means carried by said cyclically operable means to move
'said assurance means from a position'wherein said as
ing relationship with said bail, urging means to move said
isurance means prevents said non-repeat means from lim
lever, means operable by said bail to move said assurance
means to a position whereinit is ine?ective to pivot said
iting ‘the cyclically operable means to a' positionwherein
assurancemeans to a position to engage said non-repeat
8,086,155
non-repeat lever, and a holding means on said non-repeat
lever to hold said assurance means against the urging of
said urging means while said universal bar is in a second
10
rality of key levers, a plurality of code bars permutatively
set by each of said key levers, a universal bar movable
from an initial position to a secondary position by opera
tion of any of said key levers and restorable to said initial
ary position.
4. In a telegraph machine having a cyclically operable
selector mechanism normally held from cyclic operation
by having its associated clutch means disengaged, a plu
rality of key levers, a plurality of code bars permutatively
set by each of said key levers, a universal bar movable
position only upon release of the operated key lever, a
pivotally mounted bail oscillatable through a blocked
position by said selector mechanism when its clutch is
pivotally mounted bail oscillatable through a blocked
position by said selector mechanism when its clutch is
means operable to move into a position to block a second
engaged, disengaging means on said ball operable to hold
the clutch of the selector mechanism disengaged when
from an initial position to a secondary position by opera 10 said bail is in the blocked position, blocking means on
tion of any of said key levers and restorable to said initial
the universal bar to hold said bail in its blocked position
position only upon release of the operated key lever, a
when the universal bar is in its initial position, non-repeat
oscillation of said bail when said universal bar is in its
engaged, disengaging means on said bail operable to hold 15 secondary position, latching means on said non-repeat
the clutch of the selector mechanism disengaged when
means, and an assurance control means biased to a ?rst
said bail is in the blocked position, blocking means on
position to block said non-repeat means against movement
the universal bar to hold said bail in its blocked position
to a bail blocking position when said universal bar is in
when the universal bar is in its initial position, non-repeat
its secondary position and movable by said bail to a
means pivotally mounted upon said universal bar and 20 position wherein said assurance control means is latched
movable with said universal bar to a position for blocking
by said latching means in a position to be ineffective to
a second oscillation of said bail when said universal bar
block said non-repeat means until unlatched by movement
is in its secondary position, latch means on said non-repeat
of said universal bar to its initial position, whereby said
means operable when said universal bar is in its secondary
non-repeat means blocks a second oscillation of said bail
position, an assurance control means operable to pivot 25 when only a single key lever has been operated during
said non-repeat means to a non-blocking position, and
a selector mechanism cycle and whereby said assurance
means on said assurance control means to engage said
control means blocks movement of the non-repeat means
latching means on said non-repeat means to hold said
to its bail blocking position when a plurality of key levers
assurance control means in a position wherein said assur
have been operated during a selector mechanism cycle.
ance means is ineifective to pivot said'non~repeat means 30
References Cited in the ?le of this patent
until said assurance means is unlatched by movement of
said universal bar to its initial position.
5. In a telegraph machine having a cyclically operable
selector mechanism normally held from cyclic operation
by having its associated clutch means disengaged, a p1u— 85
UNITED STATES PATENTS
2,272,420
2,345,137
2,754,364
Miller et al ___________ __ Feb. 10, 1942
Long _______________ __ Mar. 28, 1944
Kleinschmidt et al ______ __ July 10, 1956
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