Patent GB-1197609-A (GB)
Title: Improvements in or relating to Calculating Machines, Cash Registers or the like.
IPC: G06C7/06
Filed: 1967-12-20
Abstract: 1,197,609. Calculating machines. INTERNATIONAL BUSINESS MACHINES CORP. 20 Dec., 1967 [23 Dec., 1966], No. 57992/67. Heading G4B. A cash register or the like includes a totalizer having sets of add and subtract digit wheels engaging according to the complement of 9 and mounted in a movable frame, control means for moving the frame to engage either the add or subtract digit wheels with a set of differential actuators during an addition or subtraction cycle and responsive to a fugitive one mechanism following said cycle to position the frame whereby either the add or subtract digit wheels are aligned with the differential actuators accord ing to the sign of the total stored in the totalizer. Thus a grand total or sub-total may be taken from the totalizer at the next cycle without further lateral movement of the frame. Totalizer; carry-mechanism.-The totalizer comprises sets of add and subtract digit wheels 42, 44, Figs. 9, 10, rotatably mounted on a shaft 34 carried by a frame 32. The add and subtract digit wheels are arranged in complementary pairs connected by face gears 46. Each order of the totalizer co-operates with a trip wheel 45 and carry wheel 43<SP>11</SP> mounted on a shaft 48. Each trip wheel is connected by a sleeve 53 to the carry wheel of the next highest order except the trip wheel of the highest order which is secured to the shaft 48. Likewise, the carry wheel 43<SP>11</SP> of the lowest order is secured to the shaft 48 whereby a fugitive one is transferred from the highest order to the lowest order. The trip wheels are actuated by the long teeth of the digit wheels and a carry effected by serially arranged members 47 on a shaft 41. The latter is rotated by a rack and pinion 49, 51 when the totalizer is disengaged from the actuators. Controling position of totalizer; total and sub-total taking.-The totalizer frame 32 is movable laterally in a second frame 30 and connected by a link 62 to a pair of slide members 66, 68 having shoulders 66A, 66B and 68A, 68B, Fig. 10. A member 69 engaging selected shoulders 66A, 66B, 68A, 68B through control members 65, 67, is rocked on actuation of the cash register. The member 65 is positioned laterally by operation of an add or subtract key to engage shoulder 66A or 68A whereby initial movement of member 69 moves slide member 66 or 68 to align the add or subtract digit wheels with the differential actuators. A swinging carriage 102, Fig. 5, supporting the second frame 30, is actuated by a slide 111 to control engagement of the totalizer with the differential actuators. The function keys cam a control bar to one of three positions to rotate a gear segment on shaft 125. The gear segment moves a cam follower 115, Fig. 6, on the slide 111 whereby the follower engages cam 110 alone, cams 110 and 112, or cam 112 alone, whereby the totalizer is lifted to engage the differential actuators on their outward movement, outward and return movement, or, return movement, for addition or subtraction sub-totalling, or totalling. A cam 50 on the shaft 34 moves a slide 54 when a fugitive one is generated to position a pivoted bi-stable member 73 accordingly. The member 73 moves the control member 67 to engage a shoulder 66B or 68B so that return movement of the member 69 positions the totalizer according to the sign of the stored total. In total or sub-total taking, the slide members 66, 68 are unaffected by movement of the member 69. In a modification, the positioning of the totalizer is controlled by a pivoted plate (187) set by reciprocating rods (165, 167), one rod (165) being controlled by the add and subtract keys and the other rod (167) by the cam (150) of the fugitive one mechanism (Fig. 12, not shown). Differential actuators.-Each differential actuator 20, Fig. 2, comprises overlapping racks 21, 22, interconnected by a gear 24. A cross-bar 37 common to all actuators is controlled by a pivoted lever 29 engaging a cam 28. Initially, the gears 24 are moved clear of the racks so that rotation of the cam 28 moves the racks 22 to the right to zeroize the print or display wheels 14. In addition, the racks 21 are moved to the right by springs 35 to engage the stems of the depressed digit keys. The gears 24 are reengaged with racks 21, 22 and the cross-bar 37 moved leftwards to enter the amount in the totalizer and the display or print wheels.