Patent GB-687204-A (GB)
Title: Improvements relating to cash registers and other adding machines
IPC: G06C11/02
Filed: 1949-12-19
Abstract: 687,204. Cash registers. ANKER-WERKE AKT.-GES. Dec. 19, 1949 [Oct. 1, 1948], No. 32525/49. Class 106 (i). A cash register or other adding-machine, having a plurality of adding mechanisms 41 and a selecting device 6 for making any one of the adding mechanisms operative, is so arranged that each adding mechanism 41 is connected to an indicator 93, the indicators being resettable independently of the adding mechanisms so that the true totals are not revelaed to unauthorized persons. As shown, the machine has two adding mechanisms 41 either of which is selected by a lever 6 fixed to a shaft 42 having a pair of toothed segments 43. Each segment 43 engages a toothed carrier 46 vertically displaceable on pins 48. Each carrier 46 has.guides 51 in which arms 52 of clutch members 53 are horizontally displaceable. Each clutch member 53 has grippers 54 at different levels such that on setting the lever 6 to a position to bring a desired adding mechanism 41 into operation, a pair of grippers 54 is brought to the level of that mechanism. Each adding mechanism 41 is mounted in arms 56 carrying pins 57 engageable by the grippers 54. The arms 56 are laterally displaceable in horizontal slots 58 in the side walls of the machine. A pin 63 in a slot in the clutch member 53 engages a draw-rod 62 slotted at 65, 65 to engage two pins 64, 64. A lever 66 pivoted at 72 carries a roller 67 engaging a slot 68 of a cam disc 69 fastened to a shaft 70. On each operation of the machine, the shaft 70 is rotated counter-clockwise through a complete revolution. For each of the amount adjustment levers, arranged similarly to lever 6 but not shown, a toothed connecting-rod 71 is provided which is moved upward or downward during the operation of the machine by amounts corresponding to the value set up. Operation. The setting lever 6 is moved to bring a pair of grippers 54 to the level of the desired adding mechanism 41. During operation, the clutch 53 is displaced to the left by the draw-rod 62 causing the said grippers 54 to engage the pins 57 of the selected adding mechanism and draw it into engagement with the toothed rod 71. A pin 81 on the draw-rod 62 projects into the path of two levers 82, 83 pivoted at 85, the levers having recesses 84 which at a given time co-operate with the pin 81. The levers 82, 83 are spring-biased against the pin 81. Each of the levers 82, 83 has a projection 87 co-operating with a cam disc 88 of the tens indicator wheel of its associated adding mechanism, whilst the other end of the levers 82, 83 each carry spring-biased latches 89. The latches 89 each project into ratchet teeth on slides 93, there being a slide 93 for each of the adding mechanisms 41. A spring-actuated piston 96 co-operates with the teeth on each slide. The slides 93 are visible through a window at the operator's side or at the customer's side of the machine. Towards the end of an adding operation, the pin 81 passes into the recess 84 of the levers 82, 83, allowing the levers 82, 83 to rotate anticlockwise under spring tension if grooves on the cam discs 88 are opposite the projections 87. This will be the case when the units wheel of an adding mechanism moves from 9 to zero. Then, the corresponding latch 89 moves into the next notch in the slide 93. During further rotation of the adding wheels, the corresponding lever 82 or 83 then moves clockwise and thus the corresponding slide 93 is moved upward one division. The slides can at any desired time be returned to their starting-point. For a comparison of the number of sales made by individuals, similar indicators may be associated with the mechanism for registering the total number of sales.