Patent GB-484881-A (GB)
Abstract: 484,881. Cash registers; revolving-barrel locks. SOC. ANON. OFFICINE DI VILLAR PEROSA. Oct. 27, 1937, No. 29381. Convention date, Oct. 31, 1936. [Class 106 (i)] [Also in Group XXV] Keyboard mechanism ; sequence arrangements ; taking totals and subtotals.-A cash register or similar accounting machine is provided with separate locks for the amount keys and operation control member. The invention is described as applied to the key-set, independently-operated machine forming the subjectmatter of Specification 471,765, which machine is provided with a number of banks of amount keys and an operation control lever 49, Fig. 2, normally locked in adding position but releasable by the insertion of a key to permit rotation in one direction to condition the machine for subtotal-taking and in the other direction for total-taking. The machine is now provided with a lock for the amount keys which are held against depression until a removable key 12, Fig. 1, is inserted in the lock and depressed, and the lock for the operation control lever is modified in such a manner, that upon the insertion of a short key 59a, Fig. 2, the lever may be adjusted to subtotaltaking positions, whereas upon the insertion of a long key the lever may be adjusted to both subtotal and total taking positions. Interlocks are provided to prevent release of the machine by a motor bar 24 until either the amount keys have been freed, or the operation lever has been freed and adjusted to a total or subtotal taking position. Amount-keys lock. The lock for the amount keys comprises a slidable bolt 1, Fig. 1, normally held in raised position by plungers 11. Upon the insertion of a headed key 12 into a slot in the plunger, the latter is freed for depression to the position shown, where it is held by a bayonet fastening. This movement of the bolt rocks a lever 6 counterclockwise about a stud 7 to remove its lower end from a notch in a disc 25, whereby the disc is freed for clockwise rotation under the control of cam plates in the amount banks and the cam plates and amount keys are released. A projection 36 on the lever 6 co-operates with a notched gear 37 set by the operation control lever to prevent depression of the bolt 1, and consequent release of the amount keys, unless the control lever is in adding position. Operation-control-lever lock. The operation control lever 49, Fig. 2, is rigid with a lock barrel 48 normally held by plungers 53 but freed for rotation into subtotal-taking positions by the insertion of a key 59a. Upon the insertion of a slightly longer key, a tumbler 56 is pressed outwardly and permits rotation of the lever in the opposite direction to totaltaking positions. Machine release. The motor bar 24, Fig. 1, is carried bv a bell-crank 21, 23 linked to a lever 17 and is normally locked by the abutment of the left-hand arm of the. lever with a blocking member 16a rigid on a shaft 15. An extension 16 of the member co-operates with a cam 63 set by the operation control lever, while an arm 14 of the shaft 15 extends into the path of the bolt 1, the arrangement being such that the motor bar is released either upon adjustment of the control lever away from add position or upon the opening of the amount-key lock. Counting number of total-taking operations. An operation counter 64, Fig. 2, is readable through a slot in the casing and is provided with an operating arm carrying a stud 66. A link 68 having a slot 70 to embrace the stud 66 is oscillated at each operation of the machine, but is normally held in ineffective position by the engagement of its roller 69 with a high part of a cam 40 set by the control lever. Upon the adjustment of the control lever to total-taking position, the hook is allowed to embrace the stud and in so doing rocks the arm slightly clockwise. During the ensuing operation, the link oscillates and advances the counter by one unit. If a second totaltaking operation is now initiated, the arm is again actuated by the oscillation of the link but this actuation does not include the initial rocking and is insufficient to advance the counter.