Патент USA US2405297код для вставки
Aug. 6, 1946. c. J. FrrcH 2,405,297 TELEGRAPHIC PRINTING APPARATUS Filed March 1'7. 1945 3 Sheets-Sheet 1 Aîg.' '6, I19m c. J'. 'F1-TCH - 2,405,297 TELEGRAPHIG PRINTING APPARATUS Filed March 17, 1945 :s sheets-sheet 2 i FlGyS. ‘ 1 11T "in L 82 INVENTOR CIJ. FITCH BY, ' ATTORNEY Aug. 6, 1946. _ c; J. FrrcH _ 2,405,297 TELEGRAPHIC PRINTING APPARATUS - ` s sheets-sheet s Í_ _I . / 2 , /00 CMF/72TH _ v Á BY Má/ lATTÓRNEY Patented Aug. 6, 1946 2,405,297 UNITED STATES vPATENT, OFFICE TELEGRAPIJIIC PRINTING APPARATUS . Clyde J. Fitch, Endicott, N. Y., assigner to Inter national Business Machines Corporation, New York, N. Y., a corporation of New York 1 ' Application March 17, 1945, Serial No. 583,227 11 Claims. (Cl. 178-4) 2 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 used. 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. ' ~ K ' 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 key. . . 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 contacts. rocks clockwise, then counterclockwise, follow Fig. 7 is a diagram of the keyboard ofthe Y ing the contour of the cam 23. When it rocks printer. - clockwise the fin I9V releases the sensing pins and Fig. 8 is a circuit diagram of the entire appa ratus. > A telegraph printer .control mechanism inv ac- 40 allows them to engage the tape. When it rocks i cordance with the invention maybe operated directly from signals. received telegraphically, or counterclockwise, the pins are withdrawn from the tape.` , „ ì - 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 Cooper articulated atingwith the toan ratchet arm St, wheel which 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` . . - , È 55 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 60 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 animee? 3 4 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 with van oiîset projection at its end, which pro 10 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 oated lower end of an arm 15 of the key lever 18 latching dog 4I is urged in counterclockwise di overthrow. 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 tuated. _ 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 zones. , . . . 45 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 will The be type inserted bar between actuatingthem.mechanism 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 ~ 70 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 75 tends to turn it into contact with the roller 63, 64 is engaged by> a springpressed armïf 10 ‘ïïwhich Y. 2,405,297 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 sition. . 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 6 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 continue. ' 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 Operation l Y At 207° the contact C4 opens, followed by the 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 dition. 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 tion. 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 f ' - - ' l 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 2,405,297 7 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°, 8 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 case. 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 55 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 M4, energizing said 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 relay R|5 was energized. rThis prepared a circuit 65 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 2,405,297 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 10 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 from 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 R21), 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 cuit through holding coil of relay R20, holding opens near the end of the cycle, relay R23 drops said relay and thus continuing 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 riage 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 dition. 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, turning. 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 ~ 14 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 30 35 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 suppressing 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 CLYDE J. FITCH.