Patent GB-368779-A (GB)
Title: Improvements relating to cash registers
IPC: G06C7/10
Filed: 1930-12-06
Abstract: 368,779. Cash registers. GLEDHILL, A. H., Trinity Works, Halifax, Yorkshire. Dec. 6, 1930, No. 36846. [Class 106 (i).] Cash registers with operating means.-In a cash register having keys of the lever type, the depression of keys sets the amount for transmission to the totalizer by bringing abutments on the keys into position for arresting the movements of spring-driven differential ele. ments that, during one turn of an operating handle, are permitted by a resetting-bar to take up positions corresponding to the values of the keys depressed and are then returned to zero position in operative engagement with the totalizer pinions. Each bank of keys A, Fig. 2, is provided with a drum D freely mounted on a shaft d<1> and urged in counterclockwise direction by a spring d<4>. Upon the depression of a key in the bank, the drum is rocked clockwise by the engagement of a projection a<1> on the key within a groove d in the drum. The drum is maintained in rocked position by a pawl d<6> entering a notch d<5> in a plate d<3> carried by the drum, with the result that the key is maintained in depressed position until the end of the operation, and no other key in the bank can be depressed during the operation. The rocking of a drum D serves to release the main shaft F, an abutment d<2> in the plate d<3> rocking a bail G to allow a tumbler g<4> to rock clockwise into a notch g<2>, whereupon a pin g5 on the tumbler rocks a lever g<8> counterclockwise to remove a stud g<9> from the path of an abutment f carried by a gear f<1> on the main shaft. At the end of a rotation of the main shaft the tumbler g' is reset by a snail cam f<2>, and a bail d<8> controlled by the tumbler disables the pawls d<6> to allow the drums to return to normal position. Differential mechanism.-The keys in each bank are provided with abutments a<2>, stepped differentially in series of three and adapted to co-operate with circumferentially spaced lugs H<1>, H2, H<3> on a spring-driven differential sector H. The sector H is normally held in zero position by a stop pawl c, that is disabled upon the depression of a key in the bank by the engagement of a nose c<2> on the plate d<3> with an arm c<1> of the pawl. A resetting-bar K co-operates with arms j<2> of the sectors and is controlled by the main shaft to allow the released sectors to rock counterclockwise until arrested by the abutments a<2> and then to return them to zero position after the engagement of the totalizer. Totalizer selecting and engaging mechanism. The differential sectors H, Fig. 2, are connected through toothed sectors J, pinions j, shafts j<4>, and pinions j<5>, Fig. 3, to a series of coaxial wheels j
. Two totalizers, comprising pinions e mounted in rockable frames e<2>, are selectively engageable with the wheels j<6> by a cam R slidable on and rotatable with a shaft r connected to the main shaft. In an add transaction, the cam R is positioned on the shaft r (by mechanism not described) to co-operate with one of two levers r<2> r<8>, Figs. 3 and 5, according to which totalizer it is desired to actuate. Each lever r<2>, r<5> is connected through a spring-retracted link r<5> to a cam r<6> the periphery of which is in operative engagement with a bowl on the totalizer shaft el. Totals and sub-totals, printing.-In a subtotal or total-taking operation, the zero-stop pawls are disabled to allow the differential sectors H, Fig. 2, to take up positions under the control of the totalizer pinions, by lifting a lever S, Fig. 3, on the shaft d<1>, that through bail G, Fig. 2, and projections d<2x> rocks the plates d3. The totalizer is selected, and the kind of operation determined, by the axial positioning of cams R<1>, R<2>, Fig. 5, relative to the shaft r, these cams being formed rigid with the cam R and operating through the same mechanism to control the engagement of the totalizers. A printing-hammer P, Fig. 3, is actuated by a cam p<1> on the main shaft to impress a record strip, and/or a card contained in a sheath provided with a cutter of the kind described in Specifications 14320/12 and 178,275, [both in Class 106 (iv), Indicating &c.]. Transfer mechanism.-At transfer, a projection e<14>, Fig. 3, on the totalizer pinion e rocks a lever e<16> pivoted on a rod e<17> carried by the rockable totalizer-frame e<2>, the lever e<17> being maintained in rocked position by a latch e<18>. As the totalizer is rocked out of engagement with the actuator wheels j<6>, a projection e<23> on the lever e<16> trips a latching- arm e<9> out of engagement with a shoulder e<8> on a transfer sector e<5>. The transfer sector, thus released, is rocked by its spring e<11> to add one unit to the totalizer pinion of next higher order. Tablet indicators.-The tablets L, Fig. 2, are each provided with an abutment L<1> for engagement by one of a series of latching-plates L mounted within a housing l<3> that is raised during every machine operation by a link l<5x> connected to the differential-sector resetting- bar K. The tablets are selected by the extensions a3 of the depressed keys that cam the corresponding plates l rearwardly into position for actuating their indicator. The latching- plates are returned to inoperative position at the end of an operation by a bail l<10> connected to the main-shaft locking-lever g<8>.