Patent GB-609078-A (GB)
Title: Improvements in or relating to cash registers and similar accounting machines
IPC: G06C11/02
Filed: 1946-03-05
Abstract: 609,078. Cash registers. NATIONAL CASH REGISTER CO. March 5, 1946, No. 6844. Convention date, Oct. 11, 1944. [Class 106 (i)] A cash register or similar accounting machine includes independently driven means to set indicators in accordance with operated itementering means, and switching means inter-related with the setting means in such manner as to operate illuminating means only after the indicators have been set and to extinguish said illuminating means prior to a new setting of the indicators. The keys of each bank control the differential positioning of a slide 39 to bring corresponding indicators 46, 47 into alignment with the usual lifting mechanism which raise the selected indicators into operative position. Operation. In adding and subtracting operations, shafts 80, 108, Figs. 1, 4, perform one clockwise rotation. Early in the cycle, a cam 79 rocks a lever 73 counter-clockwise and through parts 72, 71 opens a switch 67, Fig. 3, to cut off the current from the secondary winding of a transformer 64 to the illuminating tube - 61 which is of the fluorescent type. A cam lever 103, Fig. 4, then rocks counter-clockwise to depress a bar 93 to deflate a bellows 97, a stud 92 rocking an arm 89 to close a switch 83 to supply current to the primary of the transformer. Downward movement of the stud 92 also releases a spring-pressed latch 109 which catches over the tail 111 of the arm 89 to hold the primary switch closed. Further rotation of the shaft 108 returns the cam lever 103, but the bellows 97 re-inflates through a previously adjusted valve more slowly so that the bar 93 returns only after a predetermined time. Meanwhile, near the end of the machine cycle, after the indicators have been re-set, the cam 79 permits the lever 73 to return to close the secondary circuit and illuminate the indicators, the illumination lasting until the bellows 97 is re-inflated when the stud 92 disengages the latch 109 and opens the primary switch 83. Item total operations. Movement of the total control lever to item total position rocks the usual zero throw-out shaft 125 slightly to open the secondary switch 67 until near the end of the second cycle, when the total control lever is restored to adding position automatically in known manner. Rocking of the shaft 125 moves a link 127 and a lever 128 to shift a pitman 130 forwardly to condition the machine in known manner for two-cycle operations. A stud 133 on the pitman 130 rocks the lever 73 to open the secondary switch. When the control lever is restored automatically, it also restores the pitman 130 to permit reclosing of the secondary switch as soon as the cam 79 releases the lever 73. The primary switch functions as already described so that the item total is illuminated for the same time. Modification. Sub-total and total operations. In a modification, totals and sub-totals can be indicated. The stud 133 is re-positioned so as to operate the lever 73 fully only when the pitman 130 is moved by a cam 144 in the second cycle. In adding operations, the pitman is in rearward position and a roller 146 engages a notch to lock a cam 144 against rotation. Movement of the control lever to total or subtotal position moves the pitman slightly forward to disengage the roller 146 from its notch and to move a slide 147 which operates in known manner to cause the cam 144 to be given one rotation in the two cycles. The cam 144 moves the pitman 130 an extra step to actuate the lever 73 fully so as to retain the secondary switch open during both cycles. In the second cycle, the pitman 130 returns to intermediate position to return control of the lever 73 to the cam 79 which closes the secondary switch near the end of the cycle in the ordinary way to illuminate the indications.