Patent GB-668507-A (GB)
Abstract: 668,507. Calculating-apparatus. NATIONAL CASH REGISTER CO. May 5,1950 [May 27, 1949], No. 11128/50. Class 106 (i). A calculating or similar accounting machine is provided with a second totalizer in tandem relation with a first, the frame of the second being mounted within that of the first and rockable about the same axis for engagement with the same key-set actuators. The machine shown is similar in the main to those described in Specifications 598,524 and 606,627, and has differential stop-bars 120 (Fig. 1) settable under control of amount keys 110 to enter the amounts into totalizers by the to and fro movement of a pair of motor-driven rock-shafts 61 and 73. Rack levers 126 actuate the totalizers and are set to the amounts entered on the keys, or the complements of the amounts, by the add/subtract mechanism described in Specification 608,989 interposed between the rack levers 126 and stop bars 120. There are three totalizers: an upper tandem pair and a third accommodated between lower extensions 52 of the machine side frames. All three totalizers are normally engaged with their actuating racks and, in add/subtract operations, are disengaged at the commencement of the first half-cycle and the selected one re-engaged for the second half-cycle. In total-taking, the selected one remains engaged when the others are disengaged at the commencement. Totalizers. The No. 1 upper totalizer comprises pinions 176 (Fig. 5), and connected wheels 170 mounted between spaced frame plates 171 secured to a shaft 172 rockable about trunnions on the machine side frames. The No. 2 upper totalizer comprises pinions 180 mounted on a spindle 183 and between plates 181 rigid with a spacer bar 182, and is rockable as a unit about the shaft 172 independently of the No. 1 totalizer, apertures 184 in the plates 171 giving clearance to the spindle 183. The pinions 180 lie directly in front of corresponding pinions 176, for engagement with the same rack levers 126 and aligners 190. The No. 3 totalizer comprises pinions 195 (Fig. 1), mounted between spaced plates 198 secured to a rock-shaft 199 and engageable with racks 133 on lower extensions 132 of the rack levers 126. Tens transfer. The tens transfer mechanism for the upper totalizers is as described in Specification 608,989 but is modified so that the one mechanism co-operates with either totalizer. The actuating racks 127 (Fig. 1), have limited movement on the rack levers 126 and, in their return movement, are normally arrested in advance of the levers, each by engagement of a flange 221 (Fig. 2), thereon with an arm 220 of a transfer lever 214 associated with the next lower order. At the transfer point, a transfer cam 177 (or 185) rigid with the lower order pinion 176 (or 180) depresses the transfer lever 214 clear of the flange 221 of the higher order rack which is therefore free to move an additional increment. Latches 217 hold the transfer levers depressed and are released by a restoring bail 226 (Fig. 1), at the commencement of each machine cycle. Totalizer selection and engagement in add timing. The No. 1 totalizer has a roller 251 Fig. 7) on depending arm 250 of its side frame engaged in a cam slot lever 253 which is normaly coupled to an adjacent lever 260 (see also Fig. 9) by pawl 264. A pin 270 on the lever 260 normally engages a notch in a pitman 271 (see also Fig. 16) pivoted to a three-armed lever 272. An arm 282 on the main shaft 61 has a pawl 281 which, as the shaft 61 rocks to and fro, engages successively pins 280 and 284 on the three-armed lever, rocking it and the cam lever 253, first to disengage and then reengage the No. 1 totalizer with the actuating racks 127. Re-engagement only occurs if the cam lever 253 remains coupled by the pawl 264 to the lever 260 and this is under the control of a totalizer selector lever 350. When the lever is out of its " 1 " position, a pin 351 thereon rocks a lever 353 to position a pin 285 in the path of the pawl 264 and this releases the pawl from the cam lever 253 at the end of the forward stroke so that the cam lever is not returned by the lever 260 to re-engage the totalizer for the second half-cycle. Return of the cam lever 253 to re-engage the totalizer is then by an arm 288 on the main shaft 73 at the end of the second half-cycle and after the differential racks have been restored. Engagement of the No. 3, or lower totalizer is also by the three-armed lever 272, and through a similar releasable pawl mechanism subject to control by the totalizer selector lever 350. The frame of the No. 2 totalizer has a roller 326 (Fig. 5), engaged in a cam slot 327 (Fig. 8), in a cam lever 328 a pin 331 on which is engaged by a pawl 335 on a segment 336 secured to the main shaft 73. During the first halfcycle and counterclockwise (Fig. 8); rotation of the shaft 73, the cam lever 328 is rocked by the pawl 335 to disengage the No. 2 totalizer. At the end of the first half-cycle, and if the No. 2 totalizer has been selected, a notch 342 in the segment 336 picks up a pin 341 on a link 340 pivoted to the cam lever 328 and restores the cam lever to re-engage the totalizer. If, however, the totalizer selector lever 350 is out of its No. 2 position, the pin 351 thereon depresses a lever 355 and raises a link 374 provided with a step 381 supporting the pin 341 on the link 340. This lifts the pin 341 out of the path of the segment 336 so that the cam lever is not restored to re-engage the totalizer. A type-bar is adjusted by the selector lever 350 to print a symbol for the totalizer selected. Totalizer engagement in total and subtotaltaking timing. A total lever 400 (Fig. 9) is moved clockwise for taking totals and counterclockwise for subtotals. Either movement, through a link 403, rocks a total control bellcrank 277 counterclockwise and a link (not shown), connected to the lower end of the bellcrank, operates trip mechanism, to initiate a machine cycle, and release mechanism for the amount keys and zero stop levers, so that the differential stop bars 120 are free to be set according to the amounts standing on the selected totalizer. A surface 276 on the total control bell-crank normally overlies a roller 275 on the pitman 271 and is removed when the bell-crank is rocked by the total lever 400. If the selector lever 350 is set for the No. 1 totalizer, the lever 353 (Fig. 7), rocks a lever 430 clockwise to withdraw a surface 431 also overlying the roller 275. The pitman 271 is then released to the action of a spring 274 which breaks its pin-and-slot connection 270 with the lever 260. The No. 1 totalizer is then not disengaged at the commencement of the cycle, and is therefore reset in the first halfcycle and the amounts transferred to the differential racks and type-bars. In totaltaking, the pitman 271, at the end of its downward stroke, picks up a pin 436 on the lever 260 and rocks the lever clockwise, to disengage the reset totalizer, as it returns at the commencement of the second half-cycle and before the racks are restored. If, however, the total lever 400 is rocked counterclockwise for taking a subtotal, a roller 434 thereon engages over the pitman, preventing its engagement with the pin 436, and the totalizer remains engaged for the amounts to be re-entered as the racks are restored. Similar mechanism controls engagement of the No. 3 totalizer, and includes a pitman 306 (Fig. 9), corresponding to the pitman 271, with a releasable pin-and-slot connection 305 with a lever 301 corresponding to the lever 260. With the selector lever 350 set for the No. 2 totalizer, a lever 377 (Fig. 8) is lowered by the link 374 to bring a pin 457, on a spring- actuated finger 456 at its extremity, in front of a surface 458 of a lever 459 pivoted at 460. Clockwise movement of the total lever 400, through an arm 478 on its shaft 401, rocks the lever 459 clockwise, causing the pin 457 to disengage the pawl 335 from the totalizerengaging cam lever 328. The No. 2 totalizer then remains engaged with the actuating racks during counterclockwise rotation of the operating segment 336 in the first half-cycle. Towards the end of the first half-cycle a second pawl 470 on the segment 336 picks up the pin 331 and rocks the cam lever 328 to disengage the totalizer for the second half-cycle as required in total-taking. In taking subtotals, the counterclockwise movement of the total lever 400 and arm 478 positions a second lever on the pivot 460 so that a pin at its lower end holds the pawl 470 clear of the pin 331. The cam lever 328 is then not operated by the pawl 470 and the No. 2 totalizer remains engaged throughout the cycle. Non-add operation. Rearward. movement of a non-add lever 481 (Figs. 8 and 16) raises a link 483 to initiate a machine cycle during which a further upward movement is given' to the link. This further movement causes the totalizers to remain disengaged throughout the cycle. As regards the No. 1 and No. 3 totalizers, an arm 491 (Fig. 16) on the link rocks levers 492, 494 to position a pin 496 to hold the pawl 281 clear of the pin 284 on the threearmed lever 272 so that, in the return stroke of the main shaft 61, the pawl 281 is ineffective to restore the three-armed lever 272 to reengage the totalizers. As regards the No. 2 totalizer, the arm 491 (Fig. 8) of the link rocks the lever 355 out of the position for selecting the No. 2 totalizer which also remains disengaged.