Patent GB-925622-A (GB)
Abstract: 925,622. Multiplying machines. OLYMPIA WERKE A.G. July 24, 1959 [July 24, 1958], No. 25459/59. Addition to 901,406. Class 106 (1). The four-rule calculating machine described in the parent Specification, has a Division Key which is depressed when the totalizer contains the dividend and after the setting of the divisor in the pin-carriage of the machine to cause the pin-carriage to move to its leftmost position and to initiate the division process. The present invention provides an additional Division Key which initiates division but allows the pin.carriage to remain in the position it has reached during the setting of the divisor. In certain circumstances, this enables fuller use to be made of the capacity of the quotient counter. The first Division Key is intended to be used after entering a dividend by means of a Dividend Key which causes the totalizer to move to its rightmost position and the pincarriage to move to its leftmost position so that the dividend is entered into the highest orders of the actuating mechanism and from there into the highest orders of the actuating mechanism and from there into the highest orders of the totalizer. The first Division Key is depressed after the setting of the divisor, and thus the divisor is also entered into the highest orders of the actuating mechanism to align the highest orders of the divisor and dividend. The relative positions of the parts are represented diagrammatically in Fig. 2. However, it may be that the dividend is built up at the right of the totalizer by adding subtracting and/or multiplying operations and in this case it is desirable that, at the commencement of the division, the divisor should not be aligned with the highest orders of the totalizer since this would produce a series of zeros in the quotient counter before the first significant digit. In these circumstances, the second Division Key is used, the parts then being in the positions shown in Fig. 3b. Still more significant quotient digits may be obtained in some circumstances by using a tabulator key, which may operate in known manner to shift the totalizer carriage to the right, before building up the dividend by addition or other operations. The highest order dividend digit may thus be brought towards the left of the totalizer, so that, by using the second Division Key the highest order divisor digit may be closely aligned with it (Fig. 4b). Automatically aligning divisor with dividend.- In another arrangement, a slide 505, Fig. 7, on the pin-carriage may be raised so that when the pin-carriage is released for movement to the left after the setting of the divisor, it moves until arrested by the abutment of the slide 505 against that one of a series of stops 501 which is in effective position and which corresponds to the highest significant dividend digit. The stops 501 are carried by levers 503 controlled by cams 504 on intermediate wheels 231 of the totalizer. When a totalizer wheel moves from its zero position, its lever 503 is rocked to project its stop 501. However, an ear 502 of the lever 503 lifts the stop 501 of the next lower order to render it ineffective. Ears 507 of the stops 501 ensure that all lower stops are lifted to ineffective positions even where zeros are registered in some orders.