Patent GB-481730-A (GB)
Abstract: 481,730. Calculating - machines. NATIONAL CASH REGISTER CO. June 13, 1936, No. 16557. Convention date, June 13, 1935. [Class 106 (i)] A multiplying-machine comprises a plurality of multiplicand storers in each of which a different multiple of a multiplicand is stored, these multiples being built up by entering the multiplicand into certain of the storers and also into product accumulating means and then transmitting the amount in the product accumulating means to certain storers, means also being provided to store the multiplier and to select automatically the required multiplicand multiples in accordance with the various digits of the multiplier and to enter these multiples in correct denominational positions into the product accumulating means to form a complete product. Means are described whereby the complete product may be printed and be added to or subtracted from a carriage-selected totalizer. The invention is shown incorporated in an Ellis accounting machine. General operation. There are four multiplicand storers 1, 2, 3, 10, Fig. 3, which store one, two, three and ten times the multiplicand respectively. They co-operate with main actuators 100 and auxiliary actuators 101, these actuators being coupled at certain times by pinions 102. The actuators also co-operate with an adding product-accumulator 104 and an adding and subtracting productaccumulator 103 and with multiplier segments 105. The multiplicand is set on the keyboard, the repeat key, the multiplication key and the starting bar are depressed and the machine operates through two cycles (called cycle F and cycle G) and then stops. During cycle F, the actuators 100, 101 are coupled together by the pinions 102 and moved differentially according to the digits of the set multiplicand. Storer 1 is engaged with actuator 100 and storers 3 and 10 and product - accumulator 104 are engaged with actuator 101 so that the multiplicand is added into these units. In cycle G, since the repeat key is depressed, the multiplicand is again added into product - accumulator 104, this accumulator then holding twice the multiplicand. The multiplier now is set on the keyboard and the starting bar depressed to initiate a further cycle, called cycle H. During this cycle actuators 100, 101 are disconnected, multiplier segments 105 being engaged with actuator 100 to enter the multiplier in said segments. The product-accumulator 104 is cleared and the amount therein (twice the multiplicand) is transmitted by actuator 101 to storers 2 and 3, these storers then containing twice and three times the multiplicand respectively. The storer 10 is shifted laterally with respect to the actuators so that its contents become equivalent to ten times the multiplicand. During cycle H the number of actual multiplying cycles, one for each multiplier digit, is determined, and the first multiplier segment is felt to determine the operations in the next (i.e., the first actual multiplying) cycle. If the first multiplier digit is 1, then storer 1 is engaged with actuator 100 in sub-total-taking time to transmit the multiplicand to product-accumulator 103 during the first actual multiplying cycle. If the multiplier is 5, then storer 3 transmits three times the multiplicand to product-accumulator 103 and storer 2 transmits twice the multiplicand to product-accumulator 104. If the multiplier is 6, the actuators 100, 101 are coupled and storer 3 transmits three times the multiplicand to product-accumulator 103 also and to product-accumulator 104. If the multiplier is 7, 8, or 9 storer 10 transmits ten times additively the multiplicand to product-accumulator 104 while storer 3, 2 or 1 transmits three, two or one times the multiplicand subtractively to product-accumulator 103. During the first multiplying cycle the second cycle operations are determined. The product-accumulators 103, 104 and the multiplier segments 105 are carried on a carriage 106 which is moved one step across the actuators 100, 101 at the end of each cycle to obtain the correct denominational values of the partial products. After the last actual multiplying cycle, the machine performs another cycle (cycle A) before stopping, the storers being cleared and the carriage 106 returned. If the product is to be added into an accounting-machine totalizer, this latter is selected by paper-carriage tabulation and the starting bar depressed to cause two cycles, B and C. During B, the actuators 100, 101 are coupled, and the amount in productaccumulator 103 is cleared and added into product-accumulator 104 to make the final product. In cycle C, product-accumulator 104 is cleared and the product is transmitted to the selected totalizer and is also printed. If the product is to be subtracted from an accounting-machine totalizer, a " subtractproduct" key and the release bar are depressed. Three cycles, B, D and E, then occur. During cycle B, the final product is collected in product-accumulator 104. During cycle D, this product is cleared from productaccumulator 104 and subtracted from productaccumulator 103 which thus contains the complement of the product. During cycle E, product-accumulator 103 is cleared and the complementary product is added into the selected totalizer. Controlling the main and auxiliary actuators. The main actuators 100 and auxiliary actuators 101 comprise racks, arranged alternately, Fig. 31. The auxiliary racks 101 are urged to the right by springs 221 and arms 219 loose on a shaft 220, the arms being freed for movement when a bail 223 swings anticlockwise, the bail being connected to a similar bail similarly controlling the differential actuating slides of the accounting machine. Each main rack 100 is connected by a pin-and-slot connection (not seen in Fig. 31) to one arm of a bell-crank, the other arm 235 being connected by a link 236 to the differential actuating slide of the corresponding denomination of the accounting machine. The setting of the accounting -machine slides is thus transmitted to the main actuators 100, and vice versa. Coupling the main and auxiliary actuators. Broad pinions 102, Figs. 31, 60, carried in a frame 240, are moved downwards to couple each main actuator rack 100 to the corresponding auxiliary rack 101, the movement being controlled by a control-cam 423 fixed to a control-cam shaft 284 having eighteen positions. During each of the preliminary and final cycles F, G, H, A, B, C, D, E this shaft is set in a corresponding respective position by means described below, and during the actual multiplying cycles the shaft is set in any of ten other positions 0.. 9, the position in any such cycle being determined by the multiplier digit for the next cycle. After the control cam 423 has taken up each setting, a bail 286 rises to allow a selector arm 422 to move under the action of a spring 281 to feel the cam 423. The movement of the selector arm 422 is communicated to a selector segment 421 connected to a slotted link 420 embracing a pin on a horizontal slide 419. The right-hand end of the horizontal slide is thus lifted to bring its enlarged part into the path of a rod 310 which is moved to the right at the beginning of every cycle by cams not shown in Fig. 60. The slide 419 is thus moved to the right to rock a bell-crank 418 connected by a link 417 to an arm 416 on a shaft 243 carrying cams 414 which lower the coupling pinions 102 into engagement with the racks 100, 101. The slide 419 is returned and the pinions 102 disengaged at the end of each cycle by a rod 309 which moves to the right with the rod 310 but does not return until the end of the cycle. Multiplicand storers. The Nos. 1, 2, 3 and 10 storer wheels are shown at 342, 424, 359 and 245 respectively, Fig. 31. Only the No. 3 storer has transfer mechanism. The wheels of the other storers have pins 263 which engage fixed abutments 262 to locate the wheels in zero position. Shifting No. 10 multiplicand storer to multiply the stored value by ten. The multiplicand is entered in the No. 10 storer and this storer is then shifted relative to the actuator racks 101 to make the stored value equal to ten times the multiplicand. The No. 10 wheels 245, Fig. 51, are carried on a shaft 246 moved aixally by a saddle 714, 715, 716, Fig. 53. A slide 721 is positioned by a control cam 737 on the control-cam shaft 284 controlling a selector arm 736 and selector segment 733 connected by a vertical link 731 to the slide 721. The control-cam shaft is positioned as described below. The slide is lifted to couple it to a bar 726 when the storer is to be moved, the bar 726 and slide 721 later moving to the right so that a cam 719 on the slide moves the saddle and hence the No. 10 storer wheels into engagement with the next higher order actuator racks 101. Another cam on the control-cam shaft 284 lifts, during cycles C and E, another slide 720 so that this slide is drawn to the right by the bar 726 to return the saddle and the storer wheels to normal position. Engaging the multiplicand storers with the actuating racks. The storer wheels are moved into engagement with the actuator racks 100, 101 by mechanism similar to that shown in Fig. 60 (described above), the mechanism being controlled by cams on the control-cam shaft 284 which position horizontal slides similar to 419 so that they can be operated by the desired ones of the horizontally reciprocated rods 308, 309, 310. The rods 308, 309, 310 are moved by cams (not shown), the timing of these cams being such that, if the horizontal slide is lowered into engagement with the rod 308 the slide is moved to the right by this rod and is returned by the rod 309 to engage the corresponding storer with the actuators in adding time to enter the required multiple of the multiplicand, and if the horizontal slide is raised to put its enlarged end into the path of the rod 310, then it is moved to the right by the rod 310, and is returned by the rod 309 to engage the s