Patent GB-699910-A (GB)
Title: Cash registers, accounting machines and calculating machines
IPC: G06C11/02
Filed: 1950-09-28
Abstract: 699,910. Cash registers and calculating machines. ANKER-WERKE AKT.-GES. Sept. 28, 1950 [Oct. 24, 1949; June 29, 1960), No. 23798/50. Class 106 (i). The item indicator of a cash register, accounting machine or calculating machine comprises rotatable, or otherwise travers ible, sets of pivoted leaves marked on both faces and turned to present the two faces alternately as each leaf repeatedly passes the viewing position. In Figs. 1 and 6, the rotatable item-indicating drums of a cash register comprise five leaves 19 bearing digits on both faces and pivotally carried between discs 17, 18 on a shaft 12. The upper pivots 21 of the leaves carry arms 22 provided with upstanding pins 23 at either end. These pins bear against a curved guide 25 over the greater part of their circular travel, and co-operate with a radially slotted wheel 28 at a point diametrally opposite the observation window 102. The wheel 28 is connected by gears 26, 27 to rotate with the indicator shaft 12, and its action is to reverse the leaves, by picking up and holding back the leading pin 23 of each leaf in turn as it passes. Thus, as the shaft 12 is rotated, each leaf displays its two faces alternately at successive passes of the window 22, the digits 0 to 9 being displayed in succession during two revolutions of the shaft 12. In the modified construction of Fig. 7, the wheel 28 is replaced by a guide groove 35 opening out of a circular guide 34 for lugs at the two upper corners of each leaf 19. A fixed stop 36 disposed opposite the groove 35 constrains the leading lugs of the leaves to enter the groove so that these lugs are held back and the leaves reversed. A further form, Figs. 11 and 12, has a similar reversing mechanism, but the shaft 61 of the drum is horizontal. A series of such drums are arranged side by side to indicate an item, and a duplicate series is arranged at the front and rear of a cash register. In Fig. 1, the shafts 12 are connected through pinions 8-11 with bevel pinions 3 at either end of a set of nested shafts and pinions 2 on the shafts are engaged by the setting racks 1. In the key-operated cash-register of Figs. 11 and 12, corresponding digit drums of front and rear item indicators are interconnected by gears on parallel shafts 111, 113, 114 and 115. Associated with each pair of drums is a spring driving-mechanism 200, adapted to be wound by key depression and then released for differential setting of the drums. Each mechanism 200 comprises a coil spring in a drum 23<SP>1</SP> and anchored at its inner end. A depressed key 120 lifts a yoke 55 which, through a link 53, a toothed sector 50 and gearing 47-49, rotates a common central shaft 31<SP>1</SP> of the mechanism 200 and connected with the drums 231 by lostmotion coupling members. Each drum 231 is adapted to drive its pair of indicator drums through ratchet mechanism 28<SP>1</SP> and a pinion 161. Each pinion 16<SP>1</SP> is also connected with a wheel 67 on a respective selector shaft 70 fitted with stop pins 71 for differential control of its rotation, a zero-stop-lever 65 normally engaging over a zero pin 67 on the shaft to prevent rotation. Depression of a key 120 lifts the yoke 55 to rotate the shaft 31<SP>1</SP> to wind the springs in drums 23<SP>1</SP>, whilst the tail 57 of the key raises a corresponding selector arm 59. A supporting bracket for the zero-stop-lever 65 is rocked by the arm 59 to release the selector shaft 70 to the action of its spring drum 23<SP>1</SP>, and the arm 59 engages the corresponding stop pin 71 to arrest the shaft after a differential rotation corresponding to the digit value of the key, this rotation being transmitted to the indicator drums. The mechanism is retained set by a universal latch bar 80 released at the subsequent key depression, the set indicator drums thereupon continuing rotation to the zero position. Specification 15111/09, [Class 106 (i)], is referred to.