Patent GB-557633-A (GB)
Abstract: 557,633. Calculating apparatus. VICTOR ADDING MACHINE CO. June 5, 1942, No. 7659. Convention date, July 31, 1941. [Class 106 (i)] A multiplying machine has means for entering both factors, a plurality of accumulators, means for simultaneously entering into the accumulators multiples of the multiplicand according to the digital values in the associated denominational order of the multiplier, and means for transmitting to one of said accumulators the multiples in proper denominational order to obtain the final product. Printing mechanism is also provided for recording the factors and the product. The machine described has two ten-key keyboards, one for the multiplicand and one for the multiplier. Depression of the keys sets up these factors on stop pin carriages to control corresponding sets of actuator racks. The multiplicand racks have associated therewith four lower accumulators and an upper or master accumulator. After the set-up the machine is released for operation by depression of a motor start key and a series of nine or less adding cycles is initiated with the accumulators aligned with the units and higher order racks to receive the multiplicand a number of times depending on the setting of the respective multiplier racks, the accumulators being disengaged at the appropriate time. After the multiples have been thus accumulated the lower accumulators are automatically shifted to their respective denominations and a series of total taking cycles is initiated to clear the lower accumulators and to transfer the amounts successively to the upper accumulator whereupon the upper accumulator is cleared and the resulting product is printed. Multiplicand set-up; accumulator actuating mechanism. -The multiplicand keyboard 22, Fig. 3, has 26 keys with stems co-operating with the pins 52 of a transversely movable stop carriage 54. A Z-shaped lever 60 and a restoring slide 64, Fig. 12, are provided to restore the pin carriage at the proper time in the machine operation. A projection 70 on the lever 60 co-operates with a correction key to return the carriage to correct an error in the set-up. The set pins limit the movement of a set of multiplicand actuator racks 75 on the actuation of a restoring bail 78 by the operating mechanism. The racks 75 are formed with toothed portions 80... 84 meshing with segmental gears 86, 92 to transmit movement to upper and lower accumulators U, L<SP>2</SP> ... L5. The accumulators are mounted on pivoted frames 134 ... 138 ; the lower accumulators are moved into and out of engagement by means of studs 155 ... 158 on the frames projecting through T-slots in selector slides 165 ... 168, Fig. 5, which are mounted for longitudinal movement on an engaging beam 175 that is guided for vertical movement on fixed studs. The beam is operated by bell cranks 178, 179 and a connecting link 182 to which is pivoted a forked selector 184 for selectively engaging one or other of the studs 187, 188 of a three armed lever 190 adapted to be rocked by a cam 196, Fig. 4, on the main shaft 200. With the stud 188 in engaging relation the timing of the movement ensures addition and repeated addition on the selected accumulators. The engagement of a surface 208 on the cam 196 with the pivot of the forked selector 184 ensures the return of the beam and disengagement of the accumulators. The upper accumulator is engaged and disengaged by means of a selector arm 216, Figs. 5 and 6, pivoted on a lever 218 operatively connected by a link 220 and crank 222 to a mechanism 224, 226 and 190 similar to that for effecting the engagement and disengagement of the lower accumulators. To condition the accumulator engaging mechanism for total taking or transfer operations the forked selectors 184, 226 are rocked by links 212, 230 and control arms 500, 499 to render the studs 187 operative. The lower accumulators are shiftable axially from a normal adding position to their appropriate denomination position. The movement is effected by a rock shaft 242, Figs. 2 and 9, on which are arms 240 engaging differentially spaced flanges on the shafts of the accumulator frames. The rock shaft is operatively connected by a link 246 to a selector slide 254 with projections 255, 256 to co-operate with studs on a three armed lever 266 that is oscillated during each cycle of operation. The slide is connected at its upper end to a control link 262 operated under control of the multiplier racks as hereafter described. Multiplier set-up; control mechanism. - The multiplier keyboard 24, Figs. 4 and 5, has keys 26 to set the stop pins of a carriage 55. The carriage is movable transversely and is restored by a Z-shaped lever 61 and restoring slide 64. The set pins limit the movement of multiplier racks 275 that are normally held by detent pawls 344 in their forward position. In this position a projection 294 on the units rack engages a stud on a lever 314 connected to the upper accumulator selector lever 216 ; similarly lugs 295 ... 298 on the other racks engage levers 315 ... 318 that are operatively connected to the accumulator selector slides 165 ... 168. The levers 314 ... 318 carry spring controlled arms 334 ... 338 that are operative to displace the selector lever and slides during total transferring operations. The detent pawls 344 and a common actuating pawl 348 engage ratchet teeth on the racks ; the pawl 348 is adapted to return the displaced racks step by step and is actuated by a cam on the main shaft 200. The multiplier racks 275 are permitted to move rearwardly on depression of the motor start key 46 by the engagement of a lug thereon with a latch 356 which rocks a lever 354 to raise and release the pawls 344, 348. After this setting movement the latch 356 is freed by the action of a slide 374 operatively connected to the main shaft. On the initial movement of the racks a cross bar 376 is raised to depress a forward extension 380. This movement, through the control link 262, lowers the selector slide 254 and withdraws its support from beneath a long pawl 382. This pawl is attached to the pin carriage restoring slide 64 and is operative to return the carriages when in the position shown in Fig. 9 by a stud 388 on an arm 389 operatively connected to the main shaft. Printing mechanism.-The multiplicand and multiplier as well as the final product are recorded on a paper strip passing over the platen 40 by type wheels 106 mounted on pivoted arms 108, Figs. 3 and 5, and geared through intermediate pinions to segmental gears 92, 292 respectively. Total transferring mechanism.-The transmission of multiples accumulated on the lower accumulators to the upper accumulator is controlled by different sized lugs 392 ... 395 on the multiplier racks 275 which limit the downward swing of a bail 396, Figs. 5, 7 and 8, pivoted on a shaft 400 and formed with a stepped arcuate extension 440. The steps are adapted to cooperate with an extension 446 on a total transfer slide 402 but the slide is held in normal position by a latch 448. Associated with the transfer slide is a restoring slide 406 reciprocated by an arm 407 operatively connected to the main shaft. The slide 406 has studs connected by springs to the arms 314 ... 318 and these arms are formed with ears urged to engage a notched extension 434 on the upper side of the transfer slide and differentially positioned notches 435 ... 438 on the lower side. By this means the resulting movement of the arms 314 ... 318 ensures the engagement of its associated accumulator with the segmental gears 92. The upper accumulator will be engaged in each cycle and the lower accumulators in successive cycles. The latch 448, normally holding the transfer slide, is controlled by a lever 450 which is connected by a link 456 to a three armed lever 458 with studs co-operating with the hooked ends of a selector arm 468 pivoted to an operating slide 470. The arm 468 is connected by a second link 472 to the cross bar 376 so that when the multiplier racks are displaced the hooked arm is raised to cause the slide to rock the three armed lever to lower the link 456 and release the latch 448 and permit the arcuate extension 440 to rise as determined by the extent of the lowering of the bail 396 through engagement with the limiting lugs 392 ... 395. The raising of the cross bar 376 also lifts an arm 484 to raise a detent pawl 476 and actuating pawl 478 from engagement with ratchet teeth on the transfer slide 402. When all the multiplier racks have been restored after the multiple forming operations the pawls 476, 478 are lowered to operative position so that the transfer slide will be restored in step-by-step manner and the notches in the under side will be brought into position successively to receive the ears on the spring arms to condition the appropriate lower accumulator for engagement prior to the commencement of the rearward stroke of the actuating racks 75. The accumulator will thus be cleared and while the actuating racks 75 are displaced the upper accumulator will be engaged to receive the multiple set on the racks as the racks are returned to normal. The conditioning of the accumulator engaging mechanism for the transferring operations is under the control of notched plates 492, 493 on the rear end of the transfer slide and co-operating arms 499, 500 to the forward ends of which are connected the links 230 and 212 respectively, The arms 499, 500 are also employed to rock a bell crank 522, Fig. 6, and linkage to raise the usual zero stops in the pin carriage 54 to free the multiplicand racks for control by the usual transfer member of the accumulator. On return of the transfer slide 402 to normal position a stud 506 on the arm 499 is operative to rock a bail 510, Figs. 2 and 6, and through a link 514 to disengage a latch 370 to free the motor start key 46.