Patent GB-742084-A (GB)
Title: Improvements in or relating to accumulator mechanism for record card controlled and other calculating machines
Inventor: EXCELL ARTHUR WILLIAM
Filed: 1953-05-26
Abstract: 742,084. Statistical apparatus; transfer mechanism. POWERS-SAMAS ACCOUNTING MACHINES, Ltd. May 6, 1954 [May 26, 1953], No. 14662/53. Class 106 (1). Accumulator mechanism for calculating and like machines comprises longitudinally-movable racks having teeth on both sides for co-operation with an item totalizer and a grand totalizer respectively, each comprising intermeshing pairs of pinions in a frame rockable to engage one or the other of the sets of pinions with the racks for addition or subtraction respectively, each totalizer pinion being associated with a transfer cam and the four transfer cams of each order of the two totalizers co-operating with a single corresponding transfer pawl. The invention is applied to a machine having actuators 1 differentially-settable under the control of stops 3, in turn controlled by record cards. Each accumulator mechanism is mounted in a frame 7 and its racks 5 are integral with racks 5a meshing with racks 4 carried by the corresponding actuators, the arrangement being such that when several mechanisms are provided for co-operation with different groups of the actuators, alternate ones may be arranged below the others. Totalizer-engagement mechanism. The item totalizer pinions 16, 17 are carried by shafts 21, 22 in a frame 24 rockable about studs 25. An aligner bar 33 slidable in the frame 24 cooperates with the pinions 17 under the influence of springs 35 and bears at each end a roller 37 which engages a cam 36 fast with a toothed sector 40 rockable on the stud 25. In addition, a bar 43 is coupled with a stud 48 in a further toothed sector 41 and, after the actuators have been differentially set, the bar 43 is raised to rock the sectors 41, 40 and the cam 36. During this movement, the bar 33 first carries the frame 24 with it against a stop to engage the add pinions 16 with the racks 5 and is then itself disengaged. At the end of the cycle, the movements are reversed. In subtraction, the bar 43 is rocked to engage a stud 49 in the sector 41 instead of the stud 48, and so when it is raised, the subtract pinions 17 are meshed with the racks 5. The grand totalizer 18, 19 is engaged in a similar manner, a bar 61, which is reciprocated horizontally in total operations, being coupled with either of a pair of studs 63, 64 in a corresponding sector. The bars 43, 61 are coupled by members 78, 71 and 73 so as to rock together, the rocking being effected by power through a connection effective only when the amount involved is negative. Amounts are entered into the item totalizer, the total formed therein being transferable in one cycle to the grand totalizer, from which the grand total may be taken. Transfer and fugitive-one mechanism. At transfer, the transfer cam, e.g. 27, of the effective totalizer pinion, e.g. 16, engages the corresponding one 28 of four projections of a pawl 20 which is thus rocked about a rod 12. An ear 95 of a latch 96 is thus able to move over or under a finger 94 of the pawl 20 and a stud 98 in the latch is raised to allow the rack 5 of next higher order an additional step of movement as it is restored under the action of a spring loading the toothed rack 4, which can move through one step relative to the actuator 1. Early in each cycle, a bar 102 is raised to restore any released latches 96. The pawls 20 are then restored by spring-loaded plungers 87. A pawl 20 co-operating with the highest order is coupled by a shaft 106 to an arm having a finger 94 and controlling a latch 96 for the units order to effect the entry of the fugitive one when necessary.