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Патент USA US2405297

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Aug. 6, 1946.
c. J. FrrcH
Filed March 1'7. 1945
3 Sheets-Sheet 1
Aîg.' '6, I19m
c. J'. 'F1-TCH
Filed March 17, 1945
:s sheets-sheet 2
i FlGyS. ‘
Aug. 6, 1946.
_ c; J. FrrcH
s sheets-sheet s
. / 2
Patented Aug. 6, 1946
Clyde J. Fitch, Endicott, N. Y., assigner to Inter
national Business Machines Corporation, New
York, N. Y., a corporation of New York
Application March 17, 1945, Serial No. 583,227
11 Claims. (Cl. 178-4)
ThisI invention relates to va control mechanism
capable of operating a telegraph printer having
a larger number of keys than can be selected by
' sprocket I "l, and thence to a take-up reel (not
shown). The tape feeler I2 is adapted to open
contact TC if tension on the tape fails. In the
all the possible different combinations of the code
sensing pin guide block are five sensing pins
similar to the one shown at I5 in Fig. 1: The
On many commercial telegraph lines, a five unit
code is u-sed, known as the Baudet code. This
' sensing pins are distributed across the tape in
which is not enough to operate a page printer
line, respectively, with the iive different code po
sitions I, 2, 3, Il, 5 (Fig. 5). Associated with each
of the invention and the best mode, which has
to as PCI, PC2, PCS, PC?, and P05.
code affords only thirty-one usable combinations,
pin is a pin contact, such- as the contact
-having a standard typewriter keybo-ard. Ac 10 sensing
PCS, comprising a stationary contact spring I6
cordingly, a particular object of the invention is
and a movable contact spring Il having an in
to provide a control mechanism capable of opw
sulating rod I8 at its end bearing upon the end
erating in response to five unit code, te control
of the related sensing pin I5. During certain
a 'printer having a capacity equivalent 'to ` a
times in the cycle of operation of the tape reader,
standard typewriter keyboard, « including both 15 the sensing pins are allowed to move against the
capital and small letters. ' ~
' tape, under the action ofthe `movable contact
Other objects of theinvention will be pointl
springs. Those sensing pins which ñnd a. hole
ed out in the following description and claims
in the tape move far enough to permit the con
and illustrated in the accompanying drawings,
tact points on the contact springs to engage.
which disclose, by way of example, the principle 20 The different pin contacts will later be referred
been contemplated, of applying that principle.
Fig. l is a diagrammatic View of a tape reader
for reading the perforated tape.
'I‘he sensing pins are controlled by a 1in I9
In the drawings:
Fig.~ 2 is a vertical sectional view of a portion
on a shaft2û, which extends to the rear, as rep
resentedY by the dot and dash line 2U', and has
275 vfixed toit a three-armed lever 2 I. The lei‘twardly
directed arm of the lever 2l carries a roller 22
at its end bearing upon a cam 23 ñxed to a shaft
of a> telegraph printer which may be operated
under control of the tape reader shown in' Fig. l.
2fl,.which extends to the rear as indicated by dot
Fig. 3 is a vertical sectional view of a portion
and dash line 24', and has fastened to it a pul
of the permutation mechanism by means of which 30 ley 25 constantly driven by a motor RM through
the keys of the printer are selectively operated. `
v a belt 27. The rightwardly directed arm of the
Fig. ‘l is a detail View of the carriage return
lever is normally latched by an armature plate
Sil pivoted at 3l and pulled toward the left by a
Fig. 5 is a' section of tape illustrating the iive
spring 32. A latch magnet LM is energized, in
unit code employed.
35 a manner to be described, to withdraw theV latch
Fig. 6 is a timing diagram of the tape reader . .L plate
from the arm. When this occurs the arm
then counterclockwise, follow
Fig. 7 is a diagram of the keyboard ofthe Y
ing the contour of the cam 23. When it rocks
clockwise the fin I9V releases the sensing pins and
Fig. 8 is a circuit diagram of the entire appa
A telegraph printer .control mechanism inv ac-
40 allows them to engage the tape. When it rocks
cordance with the invention maybe operated
directly from signals. received telegraphically, or
counterclockwise, the pins are withdrawn from
the tape.`
The_,tape’feed sprocket shaft
extends to the
' rear, as indicated by dot and dash line 33', and
by means of a perforated tape. For the purpose 45 has fixed toit agfeed ratchet wheel im'.
of illustration, a tape controlled telegraph printer Y
atingwith the
arm St,
3G isisiixed
a feed
to dog
a pivot
is shown in the present application. The tape
may be one prepared bya telegraphic receiving
punch operating in response to signals from a
shaft 37. The arm 36 has journaled upon it a
roller-38 bearing lagainst a second cam
on the
tape transmitter controlled by a tape prepared by 50 shaft 24.
Normallythe arm 36 is latched by
a typewriter tape punch, of the kind shownin , < means of an arm ¿lil extending rigidly from the
my copending application Serial No. 581,609,
ñled March 8, 1945.
The tape reader`
The tape reader shown in Fig.. l> is similar‘to
the one disclosedk in Patent 2,320,788.` The tape
I0 is fed from a reel (not shown) lover aguide
_ roller vI I, a tape feeler and guideIZ, through the
slot of a sensing pin guide blockA l3,_ over .a
pivot Y¿shaft 3l .and overhanging a latching dog
lII pivoted at 42 on the upwardly extending arm
ofthe lever 2I._ When the latch magnet is en
ergized and the three-armed lever 2l rocks clock
wise, the latching dog 4I is removed from the
ann 40 and the feed arm 36 is allowed to rock
clockwise, under a pull of spring 43, following
thel contourvof cam 39, then counterclockwise,
as__the'high part of the cam passes lunc‘lerfthe
but is normally restrained by a stop 1I on a lever
small roller 38. The first movement allows the
feed dog to ratchet over a tooth of the ratchet
wheel, with which it is held in contact with» a
spring 44. The second movement of the feed
arm feeds the ratchet wheel forward by one
tooth, at the end of which movement the dog
12 pivoted on the bell crank B5, which stop nor
mally stands in the path of a lug 18 on the cam.
When the lever 12 swings to move its stop 1I out
'of the~ path of the lug 13, the arm 18 swings the
cam into engagement with the poweryroller, to
be actuated thereby, to swing the bell crank 55
engages a cam block 45, which limits its move
to actuate its connected mechanism.
ment and also locks the feed ratchet wheel against
The lever 12 has an arm 14 which is provided
van oiîset projection at its end, which pro
toothed detent wheel 49 with which Vcooperates
jects laterally through an opening in the bell
a small roller 45 on a detent arm 41 pivoted at
crank lever 65 and between the tangs of the bifur
48 and pulled downward by a spring 58. The
lower end of an arm 15 of the key lever 18
latching dog 4I is urged in counterclockwise di
The shaft 33 also has fixed to. it a
pivoted on the common rod 11. Depression of
rection about its pivot _4.2 by a small spring 5I,
so that a pin 52 thereon normally engages the 15 the key lever will rock the lever 14 and release
the cam 64 as described.
upper end of the arm 2I. As explained in the
Each key lever 16 is connected by a link- 1.8 to
above mentioned Patent 2,320,788, the timing is
such that the three-armed lever 2k! is restored to
normal positionn before the feed arm 35 completes
a related control lever 19 pivoted on a common
rod 80 and urged downward by a spring 8l against
Consequently, the latch dog 4I 20 a set of six revoluble permutation bars 82, bear
its feed stroke.
first strikes the end of the latch arm 4D and does
not move under the latch arm until the end of
the feed stroke.
ing the individual numbersßl, 2, 3, 4, 5, 5. In line
with the control lever 19. the permutation bars
have slots 83, the slots on the bars I, 3 and 5
being on the top side, while those on the bars 2,
The shaft 2_4 also has fixed to it five contact
4 and 6 are on the bottom side. If the bars 2,
operating cams 5_5, 56, 51, 5.3 and 59 with which 25 4,
and 6 are revolved while the bars I, 3 and 5
are associated, respectively, five contacts CI, C2,
remain stationary, all the bars will present slots
C3, C4, C5, to be referred to later in connection
to the particular control lever ’i9 shown in Fig. 2,
which will therefore rock downward under the in
The printer
30 ñuence of the spring 8 l, actuating the related key
lever 16. The arrangement of the slots 83 aligned
The illustrative machine comprises a typewriter
with each of thecontrol levers 19 is different,
having a keyboard 6,8 (Fig. 2), the keys of which
so that by rotating different combinations of the
are subdivided into two zones, as indicated by
permutation bars 82, diiîerent keys will be ac
the dot> and dash lines Fig. 7. Zone 1_ includes
all of the letters of the alphabet, except the letters
The driving and control means for the selective
7c and l. Zone 2 includes the letters lc and Z, the
rotation of the permutation bars has substantially
numbers, the'I‘AB key and various symbols and
with the circuit diagram.
the same construction as disclosed in Patent
punctuation marks. .In addition, the keyboard
2,165,247. Under the permutation bars is a drive
includes a carriage return key, an upper case. key,
and a space bar, these keys being outside of both 40 shaft 85 driven by a motor (not shown). The
shaft 85 has a driving gear 86 fixed to its left
end and a similar gear at its right end, which
As shown in Fig. 5, the twentyfiour letters. of
does not show in the drawings. The gear 85
the alphabet in zone 1 use the standard Baudet
with a gear 81' fixed to a short shaft 88
code combinations. This is also true4 of the space, ' meshes
journaled in bearings 88, so as to be concentric
carriage return, .line feed. figuresV shift (upper
to permutation bar 3. The gear 81 meshes with
case) and letter shift (lower case).. The .code
gears 90 and QI fixed to short shafts (not shown)
combinations formerly used for letters lc and l, are
similar to the shaft 88, but concentric to the per
used, respectively, for thefzone 1v and zone 2 shift
mutation bars I and 5, respectively. At the oppo
signals. rEhe zone shift signals occur when4 there
site end of shaft 85 the arrangement is similar
is a transfer from one zone to the otherfthat. is 50 but the gear corresponding togear 81 is ñxed on
to say, when a zone 2 character follows a Zoner l
a short shaft concentric to permutation bar 4,
while the gears corresponding to gears 98 and SI
are fixed to short shafts concentric to permuta
lows a zone 2 character», the zene l shi-ft signal ‘ `
55 tion bars 2 and 6.
character, the Zone 2V shift signal will be inserted
between them, and when a zone >lcharacter fol
The short shaft 88 has fixed to its _inner end a
be type
bar between
v v
6I- (Fig. 2)
ratchet toothed drive wheel 82 positioned to be
is of the type disclosed in Patent 1,873,512 and has
a permutation bar control mechanism» 82 forep
engaged by a tooth 93 on a sliding dog 94 of a
erating its keysÍ of the kinddisclosed- in Patent ï :Y
2,165,247.- The type bars > (notshmvn)- are-ac 60
tuated- by a power driven roller 65.» A cam 64 is
provided for each type bar and each cam is äjour
naled‘on one arm of a related bell crank -lever
65 pivoted on a stationary rod 56, the otherv ar-rn
of` the bell crank'lever 15S-being operativelyA con 85
nected with one arm ofV a related bell crank lever
51 by means of a link 68. IThe otherA armor lever
clutch 95 mounted onthe end of the related per
mutation bar 3. As more fully disclosed in Patent
2,165,247, the engagement of the tooth 93 is con
trolled by a bell crank lever 96 pivoted at 91 and
having an armature S8 attached thereto operated
by a code magnet M3. Each of the other short
shafts similar to 88 has the same kind. of clutch
means for connecting it to the related permuta
tion bar.
There are nve additional code mag
nets, to be referred to later as MI, M2, M4, M5,
61V isA connected yto the Arelated type vbar` (inet
shown) AinA ‘well known ‘mannen (see »Patent ~
The lever 65 is actuated by ythev cam 64 when
the latter is made to engage the» driven -rol-lerliâ’»`
by operation o?-a related key lever 15. _The car-n
and M5, controlling-the respective clutches.
The arrangement of the slots 88 in the permu
tation bars is such that rotation-of different com
binations of the permutation bars releases differ.
ent keys for operation. All of the keys in zone 2 _
require rotation of the No. 6 permutation bar,
while all the keys in zone l require this bar to
tends to turn it into contact with the roller 63,
64 is engaged by> a springpressed armïf 10 ‘ïïwhich Y.
remain stationary. This permutation bar, there
fore, acts as a zoning member, to route the signals
to the different zones. The control levers which
respond to the carriage return code, the line feed
code, and the space code are cut out over the
No. 0 permutation bar, so that their operation
will not be affected by it. For the rest of the
permutation bars, the arrangement of the slots
is indicated by the respective ñve position code
combinations of the tape in Fig. 4, that is, a hole
in the tape will always cause the related permuta
tion bar to rotate; therefore, the appertaining
slot will face downward.
A shift solenoid SHS (Fig. 2) _has a> plunger 02v
articulated to a lever 93 connected by a link 94
to the upper case key UC. The key UC operates
a basket shift mechanism (not shown) similar to
that disclosed in Patent 1,945,097. Accordingly,
when the solenoid SHS is energized, the _type
basket shifts to the upper case position and re
mains in that position until the solenoid is _de
energized, when it shifts back to lower case po
Fig. 4 shows a detail of the carriage return key
CR. The lever 10a of the key CR is overhung by
' a flap 06 on a keyless lever 15b.
The key lever
16a is associated with a cam mechanism for op
erating a carriage return mechanism such as
pleting a circuit from wir@A |00, through said
contact, the latch magnet LM, a series of normally
closed contacts RISC, RItc, R|1c, the contact
R21b, resistance |03, to wire IOI, energizing the
latch magnet. The armature 30 (Fig. 1) releases
the three-armed lever 2|, which rocks clockwise,
allowing the tape feed dog 35 to ratchet back
over one tooth of the wheel 34 and the sensing
pins to test the tape between 33° and 246° of the
following cycle. After the sensing p_ins have been
withdrawn from the tape by the clockwise rocking
of the three-armed lever 2|, the feed dog 35 feeds
the tape one step. The latch magnet LM will now
be energized each time the contact C5 closes, near
the end of the cycle, so long as the latch magnet
circuit remains prepared. During this time the
step-by-step tape sensing and tape feeding will
It will now be assumed, to take the simplest case
20 first, that the machine has been in operation in
zone 1 and another character in zone 1 is to be
printed. Suppose it is the character a, having
the code 12. At 33° the sensing pins test the tape.
At 45° the cam contact C4 closes, .completing a
circuit from wire |00, through contact C4, the
pin contacts PCI and PC2, the pick-up coil of code
relays RI and R2, to wire 10i, energizing said
code relays. Contacts RIa and R2a close
shown in Patent 2,104,559. The cam mechanism
is similar to those shown in Fig. 2, except that the 30 and at 81° cam contact C2 closes, completing
a holding circuit from wire |00, through
cam is of single lobe shape, instead of the double
contact C2, >contacts RI a and R264, the holding
lobe shape of cams 60. The lever 15b has no cam
coils of relays RI and R2, to the wire IOI. Con
mechanism of its own, but acts through the key
v tacts Rlb and R22) close and at 144° contact C3
lever 16a. Each of the levers 16a and 1Gb has a
control lever 19 (Fig. 2) connected to it by a link 35 closes, completing a circuit from wire |00, through
contact C3, wire |00, the series of normally closed
18. The control lever for the key lever 16a re
contacts Rita, RISa, Rl2a and RIIa, the con
Sponds to the carriage return code 4, while the
tacts R21c now closed, contacts RIb, R25, normal
control lever for the keyless lever `15b responds
contact R201), and code magnets M |,` M2 t0 wire
to the line feed code 2.
I0 | , energizing said'code magnets and causing the
40 printer to print the letter a. Y
Referring to Fig. 8, the apparatus comprises a
opening of the pin contacts PCI and PC2 at 246°'.
typewriter represented by dot and dash lines 90,
At 250° cam contact C3 opens, deenergizing the
a tape reader represented by dot and dash lines
90, and a relay gate located therebetween. When 45 code magnets MI- and M2 and at 335° cam -con
tact C2 opens, dropping out the code relays Ri
lthe apparatus is plugged to a source of power,
and R2l and restoring the circuit to normal con
represented by -1- and- in Fig. 8, and the main
switch MS on the typewriter is closed by opera
Zone 2 shift-Before the first character code of
tion of switch lever |20 (Fig. '2), circuits are com
pleted from the positive 'wire |00, through the 50 every message there will appear a zone shift sig
typewriter motor TM, the permutation unit' motor
PM, and the tape reader motor RM, to the nega
tive wire IOI, setting said three motors in opera
When the tape has been inserted in the /
tape reader, the machine is started by pressing
the start button STR. The cams operating cam
contacts CI-C5 are continuously running when
ever the motor RM is in operation. When contact
C4 closes at 45° (Fig. 6), a circuit is completed
nal. Suppose-the zone shift signal at the begin
ning of the message is thezone 2 shift signal 25
followed by the code 24, representing the number
5. >When the sensing .pins sense the zone 2 shift
signal in the tape, and when the cam contact C4
closes at 45°, circuits are completed, as previously
described, through the code relays R2 and R5,
which will be energized andthen held through
their contacts R2a and Ria, upon closure of the
from wire |00, through said contact, wire |02, the 60 contact C2 at 81°. At the Asame time, a circuit is
extended through wire |05', normal contacts Ric,
start contact STR, the pick-up coil of relay R21
transferred contacts R20, normal contacts R30
to wire IOI, energizing said relay. Contacts R21c
close, completing a circuit through the holding
and R40, transferred contacts R5c, relay Rldto
coil of relay R21 from wire |00, through tape
the negative> wire I0 I, _energizing said relay. , Con
contact TC, which will be closed whenever the 65 tacts RIlla open, to prevent a circuit from> being
tape is present with the proper tension in the
completed to the code magnets-when the contacts
tape reader, stop contact STP, contact R21c, the
C3 close later in the cycle. Contact RI?IbA closes,
holding coil of relay R21, to the wire |0I. The
contacts TC and STP are shunted by the contact
completing a circuit from wire 100, through'wire
|06, contact RI 4b, the pick-up coil of relay RI 9 to
CI, which opens between 210° and 316° of the 70 the negative wire IOI, energizing said relay. Con
cycle to test the holding circuit of relay R21. ‘
Contacts R211) and R21c close, preparing the
circuit of the latch magnet LM and the circuit to
tact _RI9a closes, completing a holding circuit
from wire |00, through normally closed contact
Rl3b, contact Rläa, the holding coil of relay RIS
the permutation code magnets IVM-M6, respec
lto the Wire ‘|0I. Contact RIBb'closes, preparing
Ytively. At 333° the cam contact C5 closes, com f7.5 .a'circuit‘to code magnet M0. «At 335° c_am conf
tact C2 opens, dropping out the relays R2, R5 and
R|4. Contact R|4a closes.
On the next cycle, the pins sense the code 24
representing .the number 5. ' The code relays R2
and R4 are energized in the manner previously
described, and the vcontacts R211 and R4b close.
At this time the circuits are prepared tothe code
magnets M2, M4 and M6, the relay R|0 remain
ing energized from the previous cycle. At 144°,
case shift key UC. Also, contact R|2b closes,
completing a circuit from wire |06, through said
contact, the pick-up coil of relay R|8, to wire |0|,
energizing said relay. Contact Rlßa closes, com
pleting a holding circuit for relay RIB from wire
|00, through normally closed contact Rlib and
contact RISa. Contact Rlâb closes, completing
a holding circuit from wire |00, through said
contact and a resistance |01 to the shift solenoid
the contact C3 closes, completing the normal cir 10 SHS. At 335°, contact C2 opens, deenergizing
relays Rl, R2, R4, R5, and RIZ. Contacts R|2a
cuit throllgh wire |04 and the code magnets M2,
close and contacts R|2b and R|2c open, but relay
M4 and M6 which are energized and cause the
R|8 and solenoid SHS remain energized. The
printer to print the number 5. As long as opera
next character code sensed will cause the printer
tion continues in zone 2, the code magnet M0 will
to print in the uppercase.
be energized in each cycle, together with such
To shift back to lower case position, the stand
combinations of the code magnets M|-M5, as the
ard “letters shift” signal 12345 is used. If the
successive code combinations in the tape call for.
sensing pins sense this combination in the tape,
Any one combination of magnets M|-M5 will
the relays R|--R5 are energized and, when con
permit operation of either of two keys, one in
zone l, the other in zone 2. Magnet Miiv deter 20 tacts C2 close, a circuit is completed through wire
|05, transferred contact R|c, contact R2d now
mines the zone. Thus, so long as the relay R|9
closed, transferred contact Rte, contact R4f now
remains energized, al1 signals will be routed to
zone 2.
closed, transferred contact R5f, coil of relay R||
to wire |0|, energizing said relay. Contact Rl la
representing a character in zone l appears in the 25 opens immediately, breaking the normal circuit
through wire |04 before the contacts C3 close
tape, it will be preceded by the zone 1 shift sig
and thus preventing the code relays from being
nal 1, 2, 3, 4. When the pins sense `thissignal,
energized during this cycle. ' Contact R| |b
the> relays R|-R4 are energized and, when the
opens, breaking the holding circuit of relay RIS.
contact C2 closes, a circuit is completed through
wire |05, transferred contact R|c, contact RZd 30 Contact Rlßb opens, dropping out the case shift
solenoid SHS. At 335° the contact C2 opens, de
now closed, transferred contact` Rëe, contact Rßf
energizing the relay RH and allowing the con
now closed, normal contact R5f, the coil of relay
tact RI la to close, restoring the normal circuit
R|3 to wire |0|, energizing said relay. The con
through wire |04. The next character code
tact R|3a opens immediately, breaking the nor
mal circuit through wire |04 and preventing the 35 sensed will cause the printer to print in the lower
Zone 1 shift-_When the first character code
code magnets from being energized during this
cycle when the contact C3 closes. Contact R|3b
opens, dropping out the relay R|c, whose contact
R|9b opens, disabling the circuit to the code
It will be noted that the case shift signals
operate in either code.
Carriage return mechanism
magnet M0. When the contact C2 opens at 40
The carriage return code is the number 4 hole.
335°, the relays RI-'R4 and R|;3 are deenergized
When this is sensed in the tape, the relay R4
and contact R | 3c closes.
is energized and, when contacts C2 close, a cir
Suppose that the next code sensed in the tape
cuit is completed through wire |05, normal con
is 24,> representing the letter r. When the con,
tacts R|c, R20, and R311, transferred contact
tact C4 closes, the relays R2 and R4 are ener- ‘ R403,
normally closed contact R5d, pick-up coil
gized. Closure of contact C3 completes the nor
of relay R|5, to Wire |0|, energizing said relay.
mal circuit through Wire |04 and contacts R21)
The contact R|5a closes, completing a circuit
and R4b to the code magnets M2 and M4, ener
from wire |06 through normally closed contact
gizing said magnets and causing the printer t0
5,0 R26c and the contact R|5a, through the holding
print the` letter r. It will be noted that, whereas
coil of relay R|5. Contact R|5c opens, disabling
the 24 code previously caused the number 5 to
be printed, following a zone 21 shift signal, this
time the code 24, following the zone 1 shift signal
causes the letter r to be printed. The relay R19
the circuit of the latch magnet LM. The arma
ture 30v remains in latching position at the end
of the cycle and the tape reader is prevented
from continuing to read the tape, though the
functions as a supervisory means having two
motor RM and cam contacts CI-C5 continue
stable conditions, between which it alternates in
to operate. The energization of relay R4 also
response to the two zone shift signals.
Case shift-Each zone includes upper case
prepares the circuit to the code magnet M4 so
that, when contact C3 closes at 144°, the normal
characters as well as lower case characters. The
upper case characters are reached in the normal 00 circuit is completed through wire |04 to the code
way, by operation of the case shift key UC. As
in standard telegraph work, this operation is in
magnet. This
causes the carriage return key CR of the printer
to be operated.
itiated by the so-called “figures shift” core 1245.
Meanwhile, the contact Rläd closed when the
When this code is read by the sensing pins, the
R|5 was energized. rThis prepared a circuit
relays RI, R2, R4 and R5 are energized. When
for a cycling sequence, to provide time for the
contact C2 is closed, ,a circuit is completed
carriage return, which will now be described.
through wire |05, transferred contacts R|c, con
When contact C2 opens near the end of the cycle
tacts R2d, now closed, normal contact R3e, con
in which the carriage return key is operated, the
tact R46 now closed, transferred contact R5e,
coil of relay R|2, to the wire |0|, energizing said 70 relay R4- is deenergized and contacts R4d return
to normal position. On the next cycle, when
relay. Contact R|»2a opens, disabling the nor
contact C2 closes, a circuit is completed through
mal circuit to the code magnets. Contact R |2c
wire |05, normal contacts R|c, R20, R3d, and
closes a circuit directly from wire |08, through
R441, wire |08, contact Rläd (now closed), wire
the shift solenoid SHS to wire` |0|, energizing
|09, normal contacts R23b and R241), coil of relay
Said solenoid, which pulls down and holds the
R22, to wire IOI, energizing said relay. Contact
R22a closes, completing a holding circuit for
relay R22, directly from the wire |08 and thence
through the previously traced circuit including
contact C2. Contact R221) closes, completing a
in the tape,'it causes the
operations previously
described, including the energization of relay
RI 5. Contact RI51) closes, completing a circuit
from wire |06, through said contact and pick-up
coil of relay R20, to wire |0I, energizing said
circuit from wire I 09, through the pick-up coil
relay. Contact R20a closes a holding circuit
of relay R23, to wire IOI, energizing said relay.
from wire |06, through normally closed contact
Contact R23a closes, completing a holding circuit
R2I1), to the holding coil of relay R20. Contact
for relay R23 directly from wire |00, through
R201) transfers, disabling the circuit of code mag
Wire I I0, normal contact R240, contact R23a, the 10 net M2.
holding coil of relay R23, to wire IOI. Contact
When a line feed signal 2 is sensed, after the
R231) transfers but without immediate effect,
previously described delay of three cycles, the
because contact R220 is open at this time.
Near the end of the cycle, contact C2 opens,
code relay R2 is energized and, when contact
C2 closes, a circuit is' completed through Wire
breaking the holding circuit of relay R22, which 15
|05, normal contact RIc, transferred contact
R20, normal contacts R30, R40, R50, pick-up coil
of relay RIS, to wire IOI, energizing said relay.
The` contact RIIìa closes, completing a circuit
from wire |09, through transferred contact R231),
from Wire |06, through normally closed contact
`drops out, restoring contacts R220 to their nor
mally closed position. When Contact C2 closes
early in the next cycle, a circuit is completed
contact R220, now closed, the pick-up coil of 20 R260 and the holding coil of relay RIG. Contact
relay R24, to wire I 0I, energizing said relay.
RIBd closes, preparing a circuit fora three cycle
Contact R2I|a closes, completing a secondary
delaying sequence, as previously described. Con
holding circuit for relay R23 through contact
tact RIIâc opens, preventing the latch magnet
R231) to wire |09. Contact R240 transfers, com
being energized at the end of the cycle,
pleting a holding circuit for relay R24 direct 25 thus stopping
the `reading of the tape.
from wire H0, through normally closed contact
When contact C3 closes at 144°, the normal
R261) and the holding coil of relay R24. The
circuit is completed through wire |00, contact
transfer of Contact R240 breaks the holding cir
transferred> Contact R201), wire II 2, coil of
cuit of relay R23 to the wire |I0, but this relay
vrelay R2I, to wire |0I, energizing said relay.
remains energized through the above described 30 lContact R2Ia closes,
completing a holding cir
secondary holding circuit. When contact C2
coil of relay R20, holding
opens near the end of the cycle, relay R23 drops
to disable the
out, the relay R24 remaining energized.
circuit of code magnet M2, until after the con~
When contacts C2 close early in the third cycle,
tact C3 opens at 250° in the ñrst cycle. Contact
a circuit is completed from wire |09, through 35 R2I1)
opens, breaking the holding circuit of relay
normal contact R231), transferred contact R241),
R20 to the wire |06. Thus, the number 2 code
the coil of relay R26 to wire IOI, energizing said
signal is diverted through the relay R2I, so as
relay. Contact RZSa closes, completing a hold
not to energize the code magnet M2, while a
ing circuit for relay R20 from wire |08, through
second delaying sequence is initiated to provide
wire III. Contact R261) opens, breaking the
time for the carriage return and line feedopera
holding circuit of relay R24, which drops out.
tion of the printer.
Contact R200 opens, breaking the holding circuit
If a line feed signal occurs not preceded by av
of relay RI5, and which also drops out, restoring
carriage return signal, the contact R201) will be
the contact RI5c to its normal closed position,
in normal position when the cam contact C3
so that the latching magnet LM will be reener 45 closes and the code magnet M2 will be energized.
gized when the cam contact C5 closes near the
This code magnet causes an operation of the
end of the third cycle. About this time, the
keyless lever '161) (Fig. 4) and thus of the car
contact C2 opens, deenergizing the relay R26
return key CR. A line feed signal not pre
and restoring the cycling circuits to normal con
ceded by a carriage return signal occurs only
50 when the carriage isY in its fully returned posi
Lz'ne feed circuit
tion. Operation of the carriage return key,
In the type of printer disclosed carriage return
therefore, causes only a line feed operation.
and line feed are accomplished concurrently by
summarizing the operation of the carriage
operation of the carriage return key. If the car
return and line feed circuits, the carriage return
riage is in its fully returned position when the 55 code causes an operation of the carriage return
carriage return key is operated, a line feed alone
key in either zone and stops the tape reader for
takes place. The code employed includes the
three cycles. The line feed code following the
standard line feed signal 2, in addition to the
carriage return code delays the reader for three
standard carriage return signal 4, so that the
more cycles, but does not cause an operation of
messages can be monitored by machines requir 60 the carriage return key. Thus, the reader is
ing the line feed signal. The carriage return
delayed for six cycles while the carriage is re
signal is always followed by a line feed signal,
but a line feed signal may occur without a pre
After the carriage is returned, if an additional
ceding carriage return signal, where plural line
line feed signal appears in the tape, it causes an
feed is required. It is necessary to prevent a line 65 operation of the carriage return key and stops
feed code from causing an operation of the car
the reader for three cycles.
riage return key of the printer disclosed in this
Tabulation-_The TAB key on the typewriter is
application, when the line feed code is preceded
in Zone 2'. The tabulation code is 124. This is
by a carriage return code; otherwise, there would
the same code as the letter y’ but the fact that
be a -double line feed where not intended. How 70
tabulation is in zone 2 means that the relay RIS
ever, when a line feed code is not preceded by
a carriage return code, it must operate the car
riage return key. ’The means for accomplishin
these functions will now be described._-
When a carriage return code signal 4 is sensed
will be energized, preparing the circuit for code
magnet M6. Accordingly, when the code 124 is
sensed in the tape with the relay RIS energized,
when the contact C2 is closed a circuit will be
75 completed through wire |05, transfer contact RIc,
2,405,297 ~
lating into a printed message combinational code
tion member for selecting the zone and code per
mutation members corresponding to the respec
tive code positions for selecting the keys within a
zone, electromagnetic devices for controlling said
signals in a code based on a small number of
different code positions, a printer having a key
board comprising a, larger numbeï` of keys than
the possible number of different combinations of 5 permutation members, energizing circuits for said
the code, said keyboard being subdivided into
electromagnetic devices, a cyclically operable rec
zones each including a different group of keys, a
ord reading device comprising code contacts op
permutation mechanism for controlling th‘e se
erated in accordance with the code designations
lective operation of said keys comprising a zon
of the record, code relays having individual cir
ing permutation member for selecting the zone
cuits controlled by the respective code contacts, »
and code permutation members corresponding to
zone shift relays, circuits for said zone shift re
the respective code positions for selecting the keys
lays including contacts controlled by said code
Within a zone, electromagnetic devices for con
relays so as to prepare said circuits selectively on
response of said code relays to certain zone shift
trolling said permutation members, energizing
circuits Yfor said electromagnetic devices, signal
signal combinations, a supervisory relay con
trolled by said zone shift relays, a normal cir
responsive means controlling the circuits of the
electromagnetic devices pertaining to said code
permutation members, a supervisory relay con
trolling the circuit of the electromagnetic device
cuit comprising branches for th‘e electromagnetic
devices pertaining to said code permutation mem
bers including contacts operated by said code re
20 lays and a branch for 'the electromagnetic device
zone shift relays controlling the energization and
pertaining to said zoning permutation member
deenergization of said supervisory relay, ener
including a contact operated by said supervisory
gizing circuits for said zone shift relays including
relay, said normal circuit including normally
means controlled by said signal responsive means
closed contacts operated by said zone shift relays
for selectively preparing the same, the energiz
and timing contacts closed by said record reader
ing circuits for said electromagnetic devices in
at a certain time in the cycle, the circuits of said
cluding normally closed contacts adapted to be
zone shift relays including timing contacts closed
opened by either of said zone shift relays, the en
by said record reader at an earlier time in the
ergizing circuits of said zone shift relays and of
cycle than said ñrst mentioned timing contacts.
pertaining to said zoning permutation member,
said electromagnetic devices including normally
open timing contacts, and means for closing said
timing contacts sequentially, ñrst those in the en
ergizing circuits of said zone shift relays, then
those in the energizing circuits of said electro
magnetic devices.
10. In a printing telegraph apparatus for trans
lating into a printed message signals recorded in
a combinational code based on a small number
1l. In a page printer for printing messages in
response to combinational code signals, a car
riage return key lever, a line feed lever adapted
to operate said carriage return key lever, permu
tation mechanism, means controlled by said per
mutation mechanism for selectively operating
said levers, control means responsive to a line
feed signal combination for causing said permu
tation mechanism to select said line feed lever,
of code positions, a printer having a, keyboard
and control means responsive to a carriage re
comprising a larger number of keys than the 40 turn signal for -causing said permutation mecha
possible number of combinations of the code, said
nism to select said carriage return lever and for
keyboard being subdivided into Zones each in
the operation of said ñrst mentioned
cluding a different group of keys, a permutation
control means during th'e following signal period.
mechanism for controlling th'e selective opera
tion of said keys comprising a zoning permuta 45
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