Patent GB-611603-A (GB)
Abstract: 611,603. Transfer mechanism. NATIONAL CASH REGISTER CO. March 21, 1946, No. 10380/48. Convention date, July 21, 1944. Divided out of 611,539. [Class 106 (i)] Transfer mechanism for a totalizer operating in either of two directions for addition and subtraction respectively comprises a transfer gear segment for each totalizer wheel, means to rock the segment in one direction or another for additive or subtractive transfer respectively, a detent normally retaining the segment in neutral position, a tripping pawl set to add or subtract position and later tripped by a cam on the lower totalizer wheel, the tripping pawl being set by a control member controlled by a selecting member. The mechanism is described as embodied in the group totalizer of the machine disclosed in Specification 611,539. The modifications necessary to adapt the mechanism for use in the balance totalizer of the said machine are also described. The selecting member which sets the mechanism for additive or subtractive operation comprises a shaft 372, Fig. 11, set under the control of add, subtract, total, &c., keys as described in Specification 611,539. The shaft has cams 490 which rock a lever 485 to move a slide 482 connected by a link 481 to a sector 478 so that the sector is positioned above one or other of two pins 475, 476 on a lever 473 connected by a link 472 to an arm 471 fixed to a transfer control shaft 339. A totalizer engaging shaft 379 is then rocked counterclockwise as described in Specification 611,539 to lift the totalizer frame to bring the totalizer wheels 182, Fig. 12, into engagement with the actuating racks 135. This motion of the totalizer engaging shaft 379 also rocks a lever 420 to lower the sector 478 to rock the transfer control shaft 339 into the proper (add or subtract) position determined by the position of the sector, the shaft being held in its set position by a pair of latches 494, 495. A control member or lever 467 fixed to the transfer control shaft 339 has ears 468, 469 engaging a pin 470 on a tripping pawl 435, Fig. 8, pivoted on a latch 437. The pawl 435 is thus set so that an add tripping surface 433 or a subtract tripping surface 434 is engaged by a transfer tooth 432 when the totalizer wheel is driven clockwise or counterclockwise for addition or subtraction respectively. Assuming subtractive operation, the mechanism is set as shown in Fig. 12, the transfer tooth rocking the tripping pawl 435 clockwise about a pivot formed by a pin 505 on the pawl abutting a totalizer frame plate 337, the tripping pawl turning the latch 437 to trip a segment release arm 441, Fig. 8, which moves counterclockwise until its end 503 rests against a pin 502 in a bell-crank 456, on a totalizer-frame moving shaft 338 carried in the totalizer frame and rocked counterclockwise when the frame is being lifted to engage the totalizer as described in Specification 611,539. As the frame-moving shaft 338 turns clockwise to disengage the totalizer, the pin 502 releases the segment release arm 441 which then swings to lower a detent 447 to free a transfer gear segment 452 mounted on a segment plate 449 in the next higher denomination. Prior to this, however, the segment plate 449 has, by a roller 455 on the bell-crank 456 operating in a cam slot 454 in the segment plate, been moved upwards relatively to the totalizer frame to engage the segment 452 with the totalizer wheel. As the clockwise motion of the bell-crank continues, the cam slot 454 pulls the segment 452 and segment plate down in step with the downward movement of the totalizer frame, the segment 452 thus remaining meshed with the adjacent totalizer pinion when the latter is withdrawn from it actuating rack 135. As soon as the pinion leaves the rack, a subtract transfer operating lever 465, Fig. 12, is rocked clockwise by a spring and engages a pin 457 on the segment 452 to turn this clockwise to rotate the totalizer pinion one step. The parts remain in this position until the totalizer is again engaged with the actuators. The segment remains engaged with its totalizer pinion until the latter is meshed with the actuator, whereupon the segment plate is drawn down relatively to the totalizer frame, the segment being restored by the engagement of the pin 457 with a cam slot in the totalizer frame. To set the mechanism for addition, the transfer shaft 339 and control lever 467 are rocked clockwise as described above to the position shown in Fig. 13, to engage the pin 470 on the pawl 435 to bring the pawl surface 433 adjacent the transfer tooth 432 as the latter turns clockwise in adding operation, the pin 470 then being held by the lever 467 to form the pivot about which the pawl 435 is rocked by the transfer tooth. A pin 466 on the control lever 467 holds the subtract transfer operating lever 465 inactive and frees an add transfer operating lever 459 for subsequent rotation counterclockwise by a spring 463 to drive the transfer segment counterclockwise to give an additive transfer step to the totalizer pinion. In total and subtotal taking, the mechanism is set as for addition, Fig. 13, but the totalizer pinions are rotated counterclockwise until the transfer teeth 432 engage the pawls 435 which in this direction of operation act as immovable zero stops. The transfer mechanism described above is modified for use in the balance totalizer described in Specification 611,539. Since in this case the mechanism has to act in the adding direction only, the parts necessary for changing to subtractive operation are omitted. The mechanism co-operates in each denomination with whichever of the two intergeared totalizer wheels described in the said Specification is in operative position, the operative totalizer wheel always rotating in the adding direction during item entering. Fugitive-one mechanism. This enters 1 in the lowest wheel of the balance totalizer whenever the highest wheel passes through zero. The transfer tooth on the highest wheel rocks a latch similar to the transfer latch 437, Fig. 8, to release an arm which is rocked counterclockwise by a spring, an arm which is rocked counterclockwise by a spring, the rocking being transmitted by a shaft to a corresponding arm in the lowest order, the latter arm depressing the transfer detent 447 to release the lowest transfer segment 452 to add 1 in the lowest denomination.