Patent GB-757113-A (GB)
Abstract: 757,113. Calculating-apparatus. BRUNSVIGA MASCHINENWERKE AKT.-GES. Jan. 26, 1954 [Feb. 28, 1953], No. 2405/54. Class 106(1). A key-set calculating machine with independently operable item-entering totalizer actuating and printing mechanism, in which each denomination of the item-entering mechanism contains a rotatable entering disc which effects item entry on the totalizer actuating elements carried on the machine main driving shaft is characterized in that the setting and return to zero of each entering disc is effected by connection with an oscillatory driven shaft by means of two clutches. Setting-mechanism. The keys 1, Fig. 1, of a denomination of a full keyboard machine have pins 2 which co-operate with sloping surface 31 of a slidable bar 3 which is connected by a link 5 to a member 9 having steps which are selectively positioned, in accordance with the depressed key, in the path of a projection 12 of a lever 13 pivoted on a pin 14 of a disc 15. The member 9 is pulled to the left by a spring 8 and a spring 10 connects the member 9 and link 5. A lever 17 is also pivoted on a pin 14 and is normally held by a latch member 22 so that its hook end 19 is away from a cam 20 on a shaft 21. The shaft 21 is connected through the crank mechanism shown in Fig. 4 to the driving shaft 68. A gear 67 may be coupled for one revolution to the shaft 68 on actuation of a pawl 71 through a key (not shown). The arrangement is such that during two successive revolutions of the shaft 68 in any direction the shaft 21 is rocked counter-clockwise then clockwise. During counter-clockwise movement of the shaft 21 the cam 20, Fig. 1a, engages the hook end 18 of the levers 13 and so moves the discs 15 counter-clockwise, each disc being arrested when the projection 12 of its associated lever 13 abuts the selected stop of the member 9 whereupon the hook 18 of the lever 13 is disengaged from the cam 20. The differential setting movement thus imparted to each disc 15 is transmitted to totalizer actuating gears 25, 26, Fig. 1, through mechanism similar to that disclosed in Specification 380,756. During the return clockwise movement of the shaft 21 the cam 20 picks up the hook 19 of the levers 17 and restores each disc 15 to its initial position when the levers 17 are held by latch 22. The gears 25, 26 actuate the totalizer 49 through the gears 46, 47, 48 in an additive or subtractive direction depending on the direction of rotation of the shaft 45. The setting of each disc 15 is transmitted via gears 27, 28, 29 to an item indicator 30 and via gears 27, 31, 32 to the rack 37 of a type segment 34 carrying type 33 which cooperate with a known kind of hammer device 33. The segment 34 has a gear segment 39 which operates a revolution counter 43 through gears 40, 41, 42. Total taking is effected by bringing each numeral wheel of the totalizer 49 into gear with the corresponding disc 15 through a clutch KR. The discs 15 driving the corresponding type segments 34 through gearing 27, 31, 32, 37. The reading of each wheel of counter 43 may be transferred to the type segments 34 by way of gear 40, clutch KZ and segment 39. Multiplication is effected by entering the multiplier into the revolution counter which then determines the number of times the multiplicand is added into the totalizer.