Patent GB-663617-A (GB)
Abstract: 663,617. Type-printing telegraphy. CREED & CO., Ltd. Dec. 25, 1947, No. 20093/47 Class 40 (iii) [Also in Group VIII] Printing-telegraph apparatus comprises mechanism for recording signals, constituted by a combination of code elements, on a tape in a form adapted to control the retransmission of signals and arrangements for alternatively controlling the recording operation of such mechanism either by a first set of members actuated directly by a keyboard or by a second set of members set in accordance with the response of a signal-responsive selector to the elements of a received signal combination and not involving said first set of members. The apparatus described, by means of a fourposition mechanical switch, is such that the perforator may be placed under control of the received signals, may be under the control of the keyboard which is or is not controlling the signal transmitter, or finally the perforator may be operatively dissociated from the receiver and the keyboard corresponding to the use of the keyboard solely to control signal transmission. The depression of the keyboard levers 1 actuates notched bars, such as 2, 3 which move associated transfer bars 7, 8 carrying projections, which in one position engage projections 9, 14 on punch-setting bars 10, 13 to prevent their downward movement. In the alternative position of the bars 7, 8 the setting bars 10, 13 are released to rotate about a spindle 11 under the action of springs 12 when a retaining bail 31 carried by a bell crank 28 is allowed to move downwardly by the action of a cam 29 on the perforator cam sleeve 24. The selective release of the bars 10, 13 rotates bell-cranks 16 so that interponents 19, 20 which are moved upwardly by a punch hammer 21, are correspondingly moved out of engaging position with punch pins 22, 23. After the perforating operation the interponents are returned to their normal position by a lever 26 rocked by a cam 25 on the sleeve 24. The punching mechanism, shown in detail in Fig. 3, comprises an operating head 106 rotatably mounted on a shaft 107 and rocked by a cam 108 on the cam sleeve 24 so that the hammer 21 selectively actuates the punch pins 22 in accordance with the setting of the interponents 19 by the bell-cranks 16. The punching head 106 is restored to normal position by the engagement of cam 108 with a roller 127 carried on an arm 126 and the punch pins which have been actuated are withdrawn by the action of a stripper plate 115 on shoulders 116 on the pins. The interponents 19 are retained in their set or unset positions by springs 117. The tape is fed through the perforator by a roller 111 held against a driving roller 110 and by a sprocket 113 engaging feed holes punched by a pin 112 engaged by a lever 123 operated by a rod 112 from a pivoted lever 120 rotated by the end of an arm 118 integral with the punch head 106. The punch pin 112 is, withdrawn by a spring 128 and the roller 110 and sprocket 113 are on shafts positively driven by ratchets engaged by pawls, Fig. 4 (not shown), biased against stops and deriving their operating movement from a rotatable lever which is rocked by a cam on the shaft 24. Operation of perforator by the signal-responsive selector mechanism.-The setting bars 10, 13 are mounted on a frame comprising the shaft 11 which can be rotated clockwise by the operation of an arm 32 in conjunction with a cam 34 so that the ends 37 of the bars 10, 13 are brought into a position beneath tails 38 of bell-cranks 39 operated by the signal-responsive selector as described in Specification 620,682. The selective rocking of the bell-cranks 39 allows the corresponding members 10, 13 to rotate under the action of their springs 12 when released by the bail 31 and, as a result, to position the interponents 19, 20 as previously described. The cam 34 is carried on a shaft 44 which can be rotated manually by a lever 36, or automatically in response to a " perforator " shift or unshift signal which, as described in Specification 643,153, is effective to place function bars 53, 54 in engaging position relative to levers 50, 51 so that a frame 57 is able to operate a lever 48 or 49 to rotate a cam 45 carried on the shaft 44. Control of perforator by keyboard.-The operation of a key lever 1, other than the " run-out " lever 60, controls, in addition to the notched bars 2, 3 a universal bar 59 rocking a lever 61 which through a further latching lever 63 raises a frame 65 engaging a projection on a member 67 so that a projection 69 is disengaged from a projection 70 on a frame 68, which rotates in a clockwise direction. A bellcrank 73 is rotated anticlockwise by a spring 72 and an arm 77 acting on a detent 78 releases a pawl 79 so that the cam-sleeve 24 is connected to a rotating shaft 81. Towards the end of a revolution a cam 84 on the sleeve 24 lifts a latch member 93 so that a lug 94 passes underneath and almost immediately the detent 78 is operated to disconnect the sleeve 24 from the shaft 81. The frame 68 also carries a relatively thin locking blade 74 engaging projections 75 on the transfer bars 7, 8 so that they are locked in position until the tape perforation has been effected. A lever 86 operated by cam 85 withdraws latch 63 from engagement with the member 65 which rotates in an anticlockwise direction extending spring 90 which connects member 65 to the latch 67. A lever 91 operated by a cam 85 lifts the frame 68 so that it is held in the non-release position by the engagement of projections 69, 70. The operation of the " run-out " lever 60 operates a bar 97 rocking a lever 98 which, through a lever 99, raises the member 65 and through projections 67, 69, 70 releases the detent 78 and allows the perforator cam sleeve 24 to rotate. The lever 99 is not under control of the cam 85 on the sleeve 24 and the latter rotates as long as the key 60 is held down. The perforator cam sleeve 24 may be placed out of control by the " run-out " key by providing the lever 99 with a tail 100 engaged by a bellcrank 101 rotated by a cam 104 on the shaft operated manually or by received signals to control the various functions of the transmitting, perforating and receiving mechanisms. The control of the various functions is shown in detail in Fig. 5 in which the cam 34 has a spiral groove and the pivoted link 32 carries the shaft 11 on which the transfer members 10, 13 are mounted and which may be moved to engage the tails 38 of the bell-cranks 39. When the shaft 143 carrying the various cams arranged to control the various functions is in the position which places the perforator under control of the signal-responsive selector, the position of the cam 45 is such that the operation of the appropriate rod 53 or 54 operating through the associated lever 50, 51 can rock the pivoted lever 144 or 145 to rotate the cam 45 and the shaft so that spiral cam 34 is rotated to remove the ends 37 of the transfer bars 10, 13 from operative position relative to the tails 38. During the operation of the perforator by the signal selector the control of the perforator cam sleeve by the operation of detent 78 is effected by a lever 160 having a pivot 161 on a bar 162 positioned by a cam 149 on the shaft 143 so that the end 166 is in engagement with the detent and is rocked by a pivoted lever 154 which is itself rotated by a bell-crank 151 through a cam 150 on the translator cam shaft which effects one revolution in response to each received signal. When the perforator is not under control of the signalresponsive selector, the cam 149 is in such a position that a notch adjacent the end 166 of the lever 160 is associated with the detent 78. Also in this position of the shaft 143, a cam 146 removes the latch 63 out of operative association with the keyboard and cam 104 similarly removes the latch 99 out of association with the " run-out " key of the keyboard. Transmitter controlled by keyboard.-When the shaft 143 is rotated to the position providing this facility, the cams 146, 104 still retain the latches 63, 99 in such a position that the perforator cam sleeve cannot be controlled by the keyboard and a cam 148 is in such a position that the transmitter is under control of the keyboard. To this end, the operation of a key moves the universal bar 59 to the left, rocking a three armed lever 177 which lifts a latch 173 so that a frame 170 rotates under the action of a spring 172 and releases the transmitter shaft for one revolution. The cam 45 is also in a position such that the appropriate signal-operated member 145 can bring the perforator under the control of the receiving signalselector. Perforator and transmitter under control of the keyboard.-For this combination of operational facilities, the cam shaft 143 is turned to a third position in which the cam 146 releases the perforator latch 63 for control by the keyboard, but the cam 104 still holds the " run-out " trip latch 99 out of engagement with the latch-operating member 65. This arrangement is provided since the perforator and transmitting cam sleeves are arranged to rotate at different speeds and the number of signals transmitted and perforated would be different. In this case, when the "run-out" key is operated, the transmitter shaft is allowed to rotate as described in Specification 656,031 and during each revolution rocks the frame 170 so that the universal bar 59 is moved to the left and operates trip latch 63 to release the perforator cam sleeve for single revolutions corresponding to the revolutions of the transmitter shaft. The cam 45 will be in a position in which it cannot be operated by either of the members 144, 145 and the cam 148 will be in a position to allow the transmitter to be controlled by the keyboard. The frame 170 is provided with an arm 186 carrying a roller 185 engaging a cam surface 184 on arm 183 of lever 177 so that movement of the frame 170 aids the movement of the universal bar 59 to the left to ensure the