Patent GB-458413-A (GB)
Abstract: 458,413. Accounting-machines. NATIONAL CASH REGISTER CO., Dayton, Ohio, U.S.A. June 18, 1935, Nos. 17475 and 17476. Convention dates, June 22, 1934 and Aug. 25, 1934. [Class 106 (i)] Printing totals and subtotals.-In totalizerengaging mechanism for cash registers and similar accounting machines of the kind wherein the totalizer is engaged with actuating means at different times or for varying lengths of time in a machine cycle according to the nature of operation being performed, the means for engaging the totalizer with and disengaging it from the actuating means is controlled by a single cam having a continuous track, the setting of the cam relatively to its driving member being changeable prior to the beginning of a machine operation for the purpose of varying the time or period of engagement of the totalizer. The invention is described as applied to the machine forming the subject-matter of Specification 452,414. The engagements of a selected totalizer with the actuators is controlled by a cam 80, adjustment of an operation control lever 82 serving to change the initial angular setting of the cam relatively to its driving shaft 86, whereby the cam is enabled to engage and disengage the totalizer at the appropriate moments of the cycle in adding, subtotal-taking and totaltaking operations. Totalizer selection. The totalizers are mounted in rockable frames fast on shafts 52, Fig. 2, and are selected by a bank of keys 56... 59. Each key is associated with a slide 60 ... 63 that, upon the depression of the key, moves upwardly to rock one of a series of levers 65 counter-clockwise about a shaft 46. An arm 73 linked to the lever 65 is thus rocked clockwise about its pivot 67 on an arm 69 of the associated shaft 52, and a stud 74 on the arm 73 engages within one of a number of notches 75 in a totalizer-engaging disc 76. This disc is rocked during each operation by a pitman 77, a roller 78 on which enters the groove 79 of the cam 80, clockwise movements of the disc serving to rock a selected shaft 52 counter-clockwise to engage the totalizer carried thereby. Totalizer engagement. The cam 80 is driven from a wheel 91, Fig. 2, fast on the drive shaft 86 and meshing with a pinion 90 freely rotatable about a stud 92 on the cam. A pinion 88 rigid with the pinion 90 meshes with a stationary wheel 87, the arrangement being such that the cam receives one clockwise revolution for each counter-clockwise revolution of the shaft. Adjustment of the operation control lever is communicated through sectors 83, 84 to the stationary wheel and serves to position the cam-groove 79 relatively to the roller 78 prior to the release of the machine. These starting positions of the cam are shown in Figs. 4, 5 and 6 for adding, subtotal-taking and total-taking operations, respectively. As will be seen from Figs. 5 and 6, the adjustment of the control lever to total-taking position engages the selected totalizer. Means are therefore provided to prevent this adjustment until after a totalizer key 56 ... 59, Fig. 2, has been depressed. Such means comprise a cranked lever 108 normally effective to prevent clockwise movement of the control lever from subtotal-taking position, but adapted to be disabled, upon the depression of a totalizer key, by a bail 110 straddling projections 113 on the slides 60-63. To disengage the selected totalizer at the end of a total-taking operation it is necessary to return the control lever to subtotal-taking position. This is preferably effected automatically by means not described. A modified form of cam groove which obviates the necessity for the interlock and the control-lever return-mechanism is shown in Fig. 8. This groove is similar to that shown in Figs. 4 ... 6 with the exception that the engaging section 79c of the groove is divided into two parts 79c<1>, 79c<2> by a disengaging section 79e, With this form of groove, the selected totalizer is not engaged prior to the release of the machine for a totaltaking operation nor does it remain engaged at the end of such an operation. The effect in other operations is idly to disengage and re-engage the totalizer at an intermediate period of the operation.