Patent GB-509441-A (GB)
Abstract: 509,441. Calculating machines. KOOPERATIVA FORBUNDET, FORENING U.P.A. March 18, 1938, Nos. 8409 and 8410. Convention dates, March 18, 1937, and Dec. 30, 1937. [Class 106 (i)] In a cash register or like calculating-machine in which actuating-pinions are displaceable from a neutral position into engagement with the wheels of any one of a plurality of totalizers, a key-set selector-plate is associated with each totalizer in such a manner that upon adjustment a cam-surface thereon becomes operative to deflect a totalizer engaging-member and thereby cause the actuating-pinions to engage the appropriate totalizer. The invention is described as applied to a machine having two totalizers 52c, 52D, Fig. 7, and a single set of actuator-pinions 51 constantly in mesh with differentially-set wheels 55. The actuating- pinions are mounted on a shaft 61 carried by levers 18 that are rockable on a shaft 60 to engage the actuators with either totalizer. For this purpose, the levers 18 are connected, by a link 50, lever 48 and link 49, to a pin 13 that is normally situated in the constricted righthand part of a slot 21 in a stationary plate, but is given a left and right excursion at each operation by a link 12 actuated by cams on the main-shaft 38. The machine is provided with two groups of transaction keys 10A, 10B, Fig. 1, arranged in a single bank, depression of either of two keys in the upper group selecting the totalizer 52c and depression of either of two keys in the lower group selecting the totalizer 52D, the remaining two keys in each group being non-add keys. The embodiment of the invention, described with reference to Fig. 7, is provided with the full bank of transaction keys although only one totalizer-selecting key 10B is shown. Upon the depression of the key shown and release of the machine, a camactuated restoring-bail 53 will release the transaction differential rack 26, which is raised by a spring-urged arm 45 until arrested by the stem of the depressed key. As the restoring- bail 53 reaches its full extent of movement, a rod 42, linked thereto, enters a slot 33 in a plate 32 and rocks the latter clockwise about its supporting shaft 31. A shoulder 34D of the plate is thus forced into engagement with an offset part 28 of a pawl 27, pivoted on the differential rack, whereby the pawl is rocked clockwise and by abutment with a shoulder 43 on a selector-member D, Fig. 7 and 13, rocks the latter counterclockwise. A cam-surface 7 on the selector-member D is thus positioned to deflect the pin 13 downwardly and engage totalizer 52D. If one of the totalizer-selecting keys in the upper group of the bank is depressed, a second shoulder 34c of the plate 32 abuts the pawl 27, whereby an upper selector-member C is rocked to deflect the pin 13 upwardly and engage totalizer 52c. If a non-add key in either group is depressed, neither selecting member is rocked and the pin moves in a straight path defined by the surfaces 6 of the members, the actuator-pinions thus remaining in neutral position. Modification. In the modified form of the invention shown in Figs. 1 and 5, selector plates A, B are adjusted directly by the depression of totalizer-selecting keys in groups 10A, 10B respectively. For this purpose, pins 11 on the totalizer-selecting keys co-operate with cam surfaces 8 formed in the members to shift the upper plate downwardly, or the lower plate upwardly, whereby a cam surface 7 of the shifted member is caused to deflect the pin 13 that in this case is shifted first to the right. In an operation in which a non-add key is depressed, neither plate is moved and the pin 13 moves in the straight path defined by the surfaces 6 of the members. Depression of a totalizer selecting key in either group causes the plates A, B to meet and thus prevents depression of a totalizer-selecting key in the other group.