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Патент USA US2107044

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Feb. l, 1938.
|__ Ml POTTS
Filed Aug. 5, 1936
2 Sheets-Sheet 2
Patented Feb. 1, 1938
PATENT. ori-fica
Louis M. Potts, Evanston, Ill., assignor to Tele
type Corporation, Gliicago, lll., a corporation ,
of Delaware
Application August 5, 1936, lSerial No. 94,350,
12 Claims.
This invention pertains to printing telegraph
systems and apparatus and more particularly to
apparatus for recording in different colors mes
sages transmitted and received.
The principal' object of the invention is to pro
vide, in a combination transmitting and record
ing apparatus, a simple and inexpensive mecha
nism responsive to the transmitting apparatus to
function differently under conditions of trans
10 mission and reception whereby transmitted and
received messages will be distinctively recorded.
Another object of the invention is to provide
for the oscillation of the inking ribbon capable
of printing in distinctive colors to afford visibility
of the record irrespective of the positionl of the
platen, and to vary, under the control of the
transmitting mechanism, the extent of such os
The above and other objects of the invention
are achieved by rendering the‘ ribbon shift
mechanism controllable by a cam associated
with the keyboard transmitter so that the cam,
during message transmission, will govern the
shifting of the two color ribbo /mechanism auto
d matically to effect printing i
a certain charac
teristic and distinctive color. During message
reception, the cam remains quiescent and the
ribbon shift mechanism is operated to a limited
extent only so as to present the portion of the
so ribbon employed for printing incoming mes
sages. On the other hand, during message
transmission, at which time a home record is
made, the cam rotates cyclically, and once during
each cycle the ribbon is oscillated a greater
35 amount than .during message reception to. present
the portion of the ribbon employed for printing
outgoing messages.
Specifically, the present invention is arranged
to be applied to apparatus such as that disclosed
in Patent No. 1,904,164 granted April 18, 1933 to
S. Morton et al., which relates to a combination
transmitting and receiving apparatus wherein
the platen is stationary and the type carriage is
movable. The ribbon shift mechanism, accord
ing to the invention herein disclosed, is con
trolled by a supplementary guide bar disposed
(Cl. 178-25)
ribbon into the path of the oncoming type bar.
When the pull bar bail is restored after recipro
cation, the ribbon yshift bell crank lever is caused
to lower the ribbon out of the path of the type
bar to render the printed record visible. In ac- 5
cordance with the present invention, the ribbon
shift mechanism has been arranged to render it
adaptable to use with a two-color ribbon, where
in the elevation to which the ribbon is shifted
by the ribbon shift mechanism is determined by 10
the colored portion of the ribbon from which a
record is to be made. It is the function of the
supplementary guide to control the amount of
elevation of the ribbon, without affecting the
visibility of the record after printing. Further 15
more, the portion of the ribbon shift bell crank
lever which cooperates with the pull bar bail is _
designed so as to function similarly for print
ing either- upper or lower case characters.
A better understanding of the invention may 20
be had from the following description, taken in
conjunction with the accompanying drawings,
wherein .like reference characters designate simi
lar parts throughout the several views, and in
Fig. 1 is a simpliñed circuit diagram of a tele
graph system to which the present invention is
Fig. 2 is'a transverse cross-sectional view of '
the printer in accordance with said patent in
which the device according to the present inven
tion is incorporated;
_ _
Fig. 3 is a. cross-sectional view of the trans
mitting mechanism;
Fig. 4 is a fragmentary plan view of the trans 35
mitting cam shaft;
Fig. 5 is a fragmental view illustrating one of
the operative positions of the device according
to the invention;
Fig. 6 is a plan view oi’ the printer according 40
to the said patent with parts broken away to
show the application of the present invention
Fig. 'I is a fragmentalY cross-sectional viewI
taken approximately on line 1-1 of Fig. 6 in
which the arrangement according to the present
parallel to the printing bail guide. The supple
invention is shown in a position for printing
mentary guide is rockable on its longitudinal
axis to either of two positions dependent upon
the operation or non-operation of the trans
mitter shaft. The ribbon shift bell crank lever
is controlled directly by the pull bar bail in such
lower case characters of an outgoing message,
manner that, each time the pull bar bail is re
ciprocated to operate a type bar, the ribbon shift
y lbell crank lever is rocked so as to raise the
Fig. 8 is a fragmental cross-sectional view simi- 50
lar to Fig. 7 in which the present invention is
shown in a position for printing upper case
characters of an outgoing message.
Having reference to Fig. 1 which is a simpli
ñed diagrammatic view of a telegraph system to 55
atomo“ I
which theÍ present invention is applicable, the
system’comprisesaloopcircuit Il interconnect
ing two .telegraph stations ii and i2 which may
have identical equipment.
understood that other stations may be included
inthisloopcircuit. Station il issbownascom
prising a receiving portion il, including a line
relay il, and a transmitting-portion il, includ
ing a transmitting
operated when the transmitting contacts it. at
any of the stations included in the loop, are
'I‘he particular embodiment of the invention
shown comprises -a printer mechanism such as
is shown in U. S. Patent No. 1,904,164, a_ trans
distributor indicated Umboli- '
cally by the transmitting contacts il. From'this
circuit itlwill be seen 'that tbeline relay Il is
of cam Il.
tative movement is 4terminated when
the cam“ continues to rotate, theroller u
up onto the high part of the cam
4i to-be'rotated through-lever I!
I. in a clockwise direction against
of spring Il.
Printing bail ".is provided with a pair
-blades "which are spaced apart to pro de -a
guidcway'for a roller Il carried on a pull
bail Il. Through this interconnection,
movement of bail 4| is imparted to the p'ull bar
U. B. Patent No. 1.595.472, and a shifting mech
anism for the colorribbon particularly adapted
for cooperation with these mechanisms.. The
unit comprises a base il for mounting of the
printer and the keyboard transmitter. 'ihe
printer is driven through a mainshaft il, Figs.
2-and 7, and the'transmitter through a main
shaftìi (ii‘ig.4)bothshaf_tsbeingdrivenin
drop therein, causing shoulder Il to cooperate
_withedgellofthepullbarbaillls‘othat u
the reciprocation of bail ll, the pull bar
actuated to the left to cause. through the
and gear relationship'therewith.“ a
to be rotated clockwise sharply lîlinst the
platen Il. -As the type bar Il is operated, the
any desirable manner from a‘ motor (not shown).
> Referring to ~Figs. 2 and 6, the printing appa
ratus to which the present invention is applied
30 comprises a typing unit (shown generally in sec
/inking ribbon Il isautomatically interposed be--
tion in Fig. 2) which includes a primary select
ing mechanism (not shown) controlledby the
line relay il and a >secondary selector or selector'
vane assembly indicated generally as `22. 'I'he
35 selector vane assembly llcontrols, through a
series of bell crank levers 28,'a corresponding
series of arcuatecode bars Il carried in a mov
tween the type face and platen, and after the
printing is completed and the type bar is ,re
turned to its lmoperated position. the ribbon
isagain withdrawn, exposing the printing record '
to view. The ribbon Il is carried in a ribbon ss
guide member Il which. in turn, is 4carried at
the end of the horizontal arm of a ribbon shift
bell crank lever Il which is pivoted at ll‘to
1,904,164, this type-carriage. indicated generally '
40 as 2l, is movable longitudinally with respect to a one end of a lever Il, which in turn is pivoted
at O2 to a bracket I3 integral with portion“ of
able type carriage. Asset forth in Patent No.
n stationary platen Il, on rollers 21 and” co
operable with track members 20 and Il respec
tively. The type carriage 2l also carries a rib
the framework of the type carriage 2l. Lever
Il, between pivotal points l! and l2, is designed
to carry aroller Il which is adapted to-have
bon supply‘and said mechanism indicated gen- ' contactual relation with the bottom sideof a rail
A' spacing mechanism (more fully
in Patent No. 1,904,164) is associated
main shaft il and controls', v'through
and Il, shaft Il,v gear „and rack I1
with the
gears Il
(Pig. 2),
50 the movement of type carriage 2l to form char
`acter spaces, tending in this movement to wind
'up the carriage return spring mechanism indi
cated generally as 3l.
Positioned in operative relation with and par
55 allel to the main operating shaft il is an auxil
iary shaft“ on which are carried various mech
anisms, for example, the printing bail 4I and the
printing bail operating arm I2. .The printing
bailI-I is actuated by a printing spring I8 in
.I l(carried onthe platen sssemblyll) dus to
the action of a spring l1 distended between lever
Il and a projection on bracket 0I.
Spring t1 tends to rotate lever .I in a clock
wise direction (as viewed in Fig. 2) about pivot
62 so that when the platen II is reciprocated be- -
tween- its upper case and lower case (“letters"
and “figures”) positions through the medium of
rod H3, as described in Patent 1,904,164, vroller
Il will constantly remain in contact with the rail ‘
ß and lever Il will thus be automatically re
ciprocated vertically therewith.
The depending arm of lever Il is operably
reciprocative motion of bail Il will cause the os
proper timed relationin the operative cycle and cilla'tion of bell crank lever Il about fulcrum
is controlled by the operating lever ‘l mounted Il `whether the platen Il be in its “letters” or
on the shaft Il. One end of lever l! carries a “ilgures'fpositiom Thus,.it will be noted that
follower roller M which cooperates with a print
when bail Il is in its normal position (shown in
ing bail operating cam 4l carried on‘shaft il. l'ig. 2), the bell crank Il will hold the ribbon Il,
Attheupperendofleverlliscarriedanad by reason of guide l1, in- its down or lower posi
iustable striker Il which cooperates with print tion to eii’ect visibility f the printed
Fbllower. roller u rides on the high part of the
c_am 4I and in consequence thereof printing bail
4| isheldtotheright (asviewedinll'ig.2) by
striker Il on lever Il. Printing -bail Il is con-~
stantly under the iniiuence of printing spring ß
which tends to rotate ball 4i- in a countcrclock
wise direction. Therefore, as the printing cam
75 Il -revolves it releases lever-'42, thereby allowing
and when bail 4I vmoves toward the left for a
printing operation. the ribbon I. will be raised
to printing position dus toy the clockwise move
ment of bell crank lever Il about pivot Il by 70
spring H2.
I_n accordance with the present invention, the
amountV ci' vertical reciprocation of ribbon guide
l1 is varied to compensate fo'll the particular
colored portion of the ribbon from which _it is 75
desired to make a record; that is, when a two
color ribbon is employed wherein incoming mes
sages are to be printed in one color or from one
portion of- the ribbon, and outgoing messages
v 3
carriage 25. It is thus observed that bell crank
|04 is movable with the carriage 25 and is slid
ably articulated to the wing bar 1|. The hori
zontal arm of bell crank |04 cooperates with a
_ are to be printed from the other portion of the .laterally disposed projection |09 (Fig. 6), of a
ribbon, it is contemplated to control automati
cally the seëagtàon of the portion of the ribbon
To e ec' this control of the inking rib
bon, a supplementary guide bar is provided which
comprises a wing bar 1| which extends between
brackets 12 4and 13 mounted on side frames, 14
and 15 respectively of the typing unit. The wing
bar 1| is pivotally supported by means of pilot
screws 16 and 11 associated with the ends there
'15 of.
By means of ' the wing bar 1| the ribbon
shift control mechanism is effective ‘for every
carriage spacing position of the type carriage 25.
'I'he wingbar 1| is rockable to 'two effective
positions under the control of a cam 18, associated
lever |01 pivotally mounted at |09 on the type
carriage 25. Lever |01 rests upon the bell crank
|04 due to gravity, or it may be spring actuated. -
When the> wing bar 1| assumes its counterclock
wise position, as shown in Fig. 2, -the bell crank
|04 acts tohold the projection |06 of lever |01
in the path of laterally disposed projection | 09
of projection | || on the ribbon shift bell crank
lever 58.y With this particular arrangement of
levers | 04 >and |01 and wing bar 1|, the recipro
cation of pull bar bail 49 during a printing oper
ation will permit bell crank lever 58 to move
clockwise a limited amount (Fig. 2) under the
action of its spring ||2, or until projection |09
20 with the transmitting mechanism shown in Fig. 4. ' is arrested by projection |06 (Fig. 6), this move
'I'he transmitting mechanism as illustrated in
Fig. 3 comprises a series of transmitting con
tacts I6 which are controlled by- a corresponding
series of goose-neck levers 19 which in turn are
for printing incoming messages in the lower case
ment being sufficientl to raise the ribbon 56 so~
that its upper color area is presented for print
The foregoing is the organization of parts .
25 operated by a corresponding series of transmit- ` or “letters” position.
ting cams 8|. Associated with the levers 19 are
a set of blocking levers 82 pivoted on a -common
In order to- print incoming messages in the
upper case or “figures” position. the platen as
shaft 83, the lower ends of which are articulated
sembly 26 is caused to rock in a clockwise direc
to individual code bars 84 which are permutably tion by means of a pull rod ||3, Fig. 2, in a
30 settable by means of key levers 85. Upon a pre l manner described in Patent No. 1,904,164. When 30
determined permutable setting of code bars 84
through the instrumentality of code notches
the platen assembly is so actuated, the roller
65 is caused to remain in contact with -therail
thereon, the bars 84 will assume their right or 66 by means of spring 81, which causes lever
left positions according to -the particular key 6| to rotate clockwise to raise the pivot 59, thus
lever operated, which arrangement of the code raising the bell crank lever 58 a corresponding 35
bars 84 will effect a corresponding position of amount to bring the projection ||4 into align
levers 82 to either prevent or permit, through ment with the projection |06 ofl lever |01, as
shoulders 86, the goose-neck 1evers_19 to respond shown in Fig. 8. It is thus seen that the same
to the cams 8| to control in turn, through thev _limited clockwise movement of bell crank lever
contacts I1, the transmission of a character code 58 is obtained in either the upper or lower case 40
combination corresponding to the key lever-85 position of the platen for printing incoming
messages on the lupper portion of inking rib
bon 56.
As described in Patent No. 1,595,472, the de
pression of a key lever 85 also effects the release>Having reference again to Figs. 2 and 6, the
of a throw-out clutch arm 81, whereupon a grab wing bar 1| carries a shouldered arm ||5 which
clutch 88 is rendered engageable and operable cooperates in a manner hereinafter described
through the continuously rotating shaft 2| to with a latch ||6 suitably pivoted at | |1 in the
impart thereby, rotation to cams I6 and a gear printer frame. Upon rotation of face cam 18,
89 through a. single cycle. Associated with the during the transmission and printing of out
transmitting ‘mechanism and arranged parallel going messages, the follower roller 98 will ride up 50
ontothe high portion thereof, whereby bar 91
will be actuated rightwardly against the action
shaft 9| and the cam 18 carried thereon. Thus, _of a spring |03. The rlghtward movement o_f
upon each actuation of key lever 85, Fig. 3, the bar 91 will impart counterclockwise movement
to the shaft 2| is a shaft 9| which carries a gear
- 92 meshed with gear 89 to impart rotation to
55 transmitting shaft 2| is rotated to eñect trans
mission of a code signal, and simultaneously
therewith shaft 9| is rotated to control, through
cam 18 and a linkage to be presently described,
the oscillation of the ribbon 56 to present the
00 desired colored portion thereof _ to the printing
Cooperating withv cam 18 and mounted slid
ably on bearings 93 and 94 carried on brackets
95 and 96, respectively, is a horizontal bar 91.
65 Mounted on the left end of bar 91 (Fig. 2) is
follower roller 98 which cooperates with cam, 18.
The right end of bar 91 is provided with a lat
erally disposed portion 99 'which urges against
the lower arm of lever |0| suitably pivoted at |02
70 in the printer structure. The upper end of
lever |0| is forked so as to embrace the lower
wing of bar 1|.
The upper wing of bar 1|r cooperates with
the forked end of a depending arm of bell crank
75 member |04 pivotally carried at |05 by the type
to lever |0| against the action of its spring ||8
which in turn will cause wing bar 1| to rock
clockwise to the position shown in Fig. 7, thus
bringing the projection ||5 into a position to be
Alatched up by the latch portion ||6, a spring ||9
acting to bring the latch ||6 into latching en 60
gagement with the shouldered portion ||5. As
shown in Fig. 5, the actuation of wing bar 1| to
its clockwise position causes bell crank |04 to be
rocked counterclockwise so that its horizontal
arm is lowered sufliciently to permit projection
|06 on lever |01 to escape the'projectìon |09 on
lever 58. Thus, when the pull bar bail 49 is actu
ated leftwardly, the ribbon shift bell crank lever
58 will be permitted to rotate clockwise under
vthe action of its spring ||2 a greater amount
(than when it was blocked by projection |06) as
shown in Fig. 7, so that the lower colored area of
ribbon 56 may be presented to the printing posi
tion for recording outgoing messages.
To print outgoing messages in the upper case 75
saluto“ '
movement olleverlliscontrolled
I“ and Ill which
latel'llportion III
kwhenthelefvera'llland Illarecaussdtoassume 'iection Iller ill (dependingy upon whether'>
.-. »» measagœaretob'eprinted?he
become latched in that position by the coopera
tion 4of latch III withshouldered portion lll. By
correspondingly. cyclicy movement is imparted -
through sears Il and I2 (Fig. 4) tothe iace'cam
1I. thus for each cycle oi rotation ot cam ‘Il the
oi'barll andlever Ill.wingbar`|l beinglatched 4
in its clockwise position untilthe printing oi the
character has been eil'ected, whereupon it is‘un
latched by the lever I!! carried on the printing‘
bauu. mrœkingortnewmgbar-il'œm
nismis elective upon the return of the printing
25 bail Il to its normal non-operated position to
clockwise position each time a .key lever is de- ~
pressed and a character is transmitted causes,
through lever I“, the shitting of the end or por
tion- Il. from its blocking position to permit, _
through the escapement of portion I" or H4, a
i'uller movement ci bell crank lever I8 to bring
unlatch the member HI irom'the shouldered
portion III to permit the wingbar 1I toassume
its counterclockwise position due to the action ot the lower portion of the ribbon It into printing`spring lil on lever III. To‘eRectthisdisen-~
30 gagement, there is provided on the printing bail
It is, oi course, understood that this applica
4I.' a bracket ill onthe lower end of which is tion is intended to cover not only the speciiic em
pivoted an arm i!! having a shoulder |28 (rig. bodiment disclosed but also sumcient changes or
'1) to' cooperate with a depending portion |24 on modi?cations as come within the spirit of- the
latch lil. Arm il! normailytendsto rotatein a invention or scope o! the following claims.
counterclockwise direction toward the portion |24
what is claimed is:
. n
by a spring Ill. When the printing bail 4I as
sumes its clockwise position, the shoulder |23 as
sumes the position with respect to portion |24
'shown in Fig. 2, and when printing bail 4| is
actuated to its counter-clockwise position, shoul
der |23 is brought into eilective cooperative rela
l. In a telegraphapparatus. _a platen, a shitt
able ribbon carrying mechanism, means to shirt
and return the ribbon carrying mechanism'ir
respective >of the podtio? of the platen to reveal
the recordat the point of printing aftereach
printing operation, transmitting means, and
tionwitharm I24,asshowninl'lg.7,sothat means controlled by said transmitting means to
vary the degree of shifting oi the ribbon carrying
2. In a telegraph apparatus. a movable type
carriage, ribbon _carrying mechanism mounted
III to become disengaged from the
portion III to free thewingbarl'ltopermitits
response through lever ill, to spring Ill.
stantially concurrently therewith, lever |22 is de
nectedbypinorstud III soastoeii'ectthe dis
engagement ot shoulder |28 from depending arm
(Fig. 7).
General operation
the reception
of incoming
shown in Pigs.1 3
and 4 remains idle and the follower roller Il re
sides in ëthe lower portion oi'l thelace cam 'Il
thus permitting lever III, through its spring ill,
tohoidthewingbarll inihcounterclockwise
positionssahowninll'igaàandl. Uponre
ceipt o! a code signal, therotation oi'the main
shaft Ilisinitiatedinpropertimedrelation with
the operation ofthe selectormechanism, as fully
described in Patent No. 1,904,164. _"nie rotation
ofshaft I! causes,throughcam4landoperating
ann42,theprintingbail4i tobeoscillatedto
cause, through' pull'bar bail Il, the operation of
atypebarllto eilectprintingonthe upperpor
tion ci the'inking ribbon It. -Because oi' the act
that, although the movement of the ribbon
on said carriage, means for shifting said ribbon,
transmitting means, and means cooperating with
said carriage and controlled by said ltransmitting ~
means to cause'said ribbon shitting means to op
erate diii'erently when said transmitting means is
operative than when said transmitting means is
8. In a telegraphsystem. a-telegraph line, a
plurality of stations each comprising a transmit
ting portion for sending outgoing signals over
said linev and a receiving portion for producing a
characteristic record of said outgoing as well as
incoming signals, a carriage in each receiving
portion movable to form character spaces, a rock
-able guide member arranged parallelly to the
path of movement oi' said can-lage, means asso
ciated with said transmitting portion to control
the degree oi' movement of said guide, and means .
controlled by said guide for making the record oi’
said outgoing and incoming signals characteris
tically diilerent.
4. In a telegraph apparatus, sending means,
receiving means, a carriage movable in accord
ment oi said carriage, means associated with said
sending means to control the rockability ofsaid
guide, and means continued by said guide for
u bellcrankleverlliisgovernedbythemovement makingtherecords governedbysaidsending"
means and said receiving means distinguishable
from one another.
5. In a recorder, a movable type carriage, a
am of oscillation of the ribbon carrying mech
ribbon carrying means mounted on said carriage,
an intermittently operable member mounted on
said carriage and adapted to perform the record
ing operations, means- cooperating with said mem
ber to effect oscillation of said ribbon to provide
visibility of the record as it is made, and means
effective under certain predetermined conditions
to vary the extent of oscillation of the ribbon.
6. In a recorder, a movable type carriage, a rib
bon carrying means mounted on said carriage, an
intermittently operable member mounted on said
carriage and adapted to perform recording oper
ations, a shiftable platen, means to render said
iirst mentioned means shiftable with said platen
to maintain its cooperative relation therewith,
means cooperating with said member to effect
oscillation of the ribbon to provide visibility of
the record as ~it is made in either the shift or un
shift positions of said platen, and means effective
in either position of said platen to vary the extent
of oscillation of the ribbon.
'7. In a recorder, a movable type carriage, mech
anism in said carriage for effecting recording
operations, a platen, shift mechanism for con
trolling said platen, ribbon carrying mechanism
mounted on said carriage, means mounted on said
carriage to perform recording operations, means
cooperating simultaneously with said recording
mechanism and said platen to eiIect oscillation of
said ribbon irrespective of the position of said
platen to provide visibility of the record as it is
9. In a telegraph apparatus, a transmitting de
vice. a recording device, a ribbon operating mech
anism, a device to alter the operation of the rib
bon operating mechanism, means operated-by the
transmitting device to condition the ribbon oper
ating mechanism for altered operation, and
means eiïective after each recording operation to
return the ribbon mechanism to its original con
10. In a telegraph apparatus, printing mecha
nism, a platen having a plurality of shift positions,
ribbon carrying mechanism, means to effect oscil
lation of the ribbon irrespective of the position of 15
the platen to provide visibility of the record,
transmitting means, means controlled by said
transmitting means to alter the operation of said
first-recited means, means to retain said iirst
recited means in altered position, and means 20
controlled by said printing mechanism to return
said first-recited means to its original position.
11. In a telegraph apparatus, a printing bail,
a ribbon supporting mechanism, means for mov
ing said mechanism for each printing operation 25
in response to -operation of said printing bail, a
transmitter, and means operated from the trans
mitter for causing further movement of said
mechanism upon operation of said bail to effect
printing in a distinctive color.
- 12. In a telegraph apparatus, a printing bail, a
ribbon supporting mechanism, means for moving
said mechanism for each .printing operation in
response to movement of the printing bail, a
transmitter for transmitting signal impulses, a .35
35 made, land means' effective under certain oper
operated in timed relation'to the transmis
ating conditions to vary the extent of oscillation cam
sion of signal impulses by said transmitter, and
of the ribbon.
8. In a telegraph apparatus, a platen, ribbon mechanism positioned by said cam for causing
said ribbon supporting mechanism to be moved
carrying mechanism, means to effect oscillation an additional amount on the operation of the 40
printing bail.
the position of the platen to provide visibility of
the record, transmitting means, and means con- '
trolled-by said transmitting means to vvary the
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