Patent GB-442142-A (GB)
Title: Improvements in or relating to calculating and the like machines
IPC: G06C7/06
Filed: 1934-08-01
Abstract: 442,142. Calculating-apparatus. BURROUGHS ADDING MACHINE CO., 6071, 2nd Boulevard, Detroit, Michigan, U.S.A. Aug. 1, 1934, No. 22433. Convention date, Aug. 2, 1933. [Class 106 (i)] In machines having mechanism which necessitates the depression of a number of designation keys in ordei to condition the machine for operation means are provided for grouping the banks of designation keys and for rendering one or more groups of keys ineffective by operation of certain keys of the bank of control keys. The invention is described as applied to the known Burroughs portable machine combined with a cash drawer as described in Specification 394,322. The operating shaft 22, Fig. 1, is connected to the driving plate 26 through a disconnectible connection 23, 24 which is conditioned for operation by the movement of a latch plate 27. The plate 27 is normally blocked against movement by the arm 32 of a bell-crank 31, the other arm of which is connected to the lug 34 of a pivoted bail 36 provided with a series of upwardly extending lugs 38, Figs. 1 and 3, engaging the hooked forward ends of slides 39, there being one slide associated with each bank of designation keys 3. As shown, the designation key banks are divided into two groups, the lefthand bank forming one group and the next three banks constituting the other group. The grouping is effected by connecting the forward ends of the slides 39 by means of a rod 43. A partial disablement of the designation control is effected by the subtraction conditioning means. For this purpose the add and subtract lever 44 has a pin 46 engaging a cam arm 47 of a bail 48 having an arm 49 which when the lever is moved to subtract position causes the slides 39 to move forwardly and be free of control by the bail 36. When the machine is in use for checking receipts, the lever 44 is set to the subtraction position when registering " paidout " transactions. In the case of a " no sale " transaction the designation control is partially disabled by the depression of a control key 50 which opens the cash drawer and displaces a slide 51 to rock the bail 48 by the engagement of an abutment 53 on the slide with a lug 54 on the bail. When the machine is to be used for ordinary calculations the control is entirely disabled by the operation of a manager's key 55 which displaces a slide 58 and by means of the engagement of a lug 59 thereon with a projecting arm 60 on the bail 36 rocks the bail to disable the four slides 39. In the embodiment shown in Fig. 4, a bank of control keys, comprising a total key T, grand total key GT, "no sale " key 61, " cash key 62, " received on account " key 63, and a " change " key 64, is provided; the keys GT, T, 62 and 64 co-operate with cam projections 66 on a slide 65 engaging by its hooked forward end a projection 38a on the bail 36 so that depression of one or other of these keys releases the bail for control by the designation key banks. Depression of one or other of the control keys 61, 63 disables the designation control by their action on pivoted levers 67, 75. The lever 67 by its cam edge 69 engaging a pin 70 on a lever 71 rocks the lever and thereby displaces a slide 73 ; the lever 75, through its connection with a link 76, also displaces the slide 73. The movement of the slide 73 by means of an arm 74 effects the rocking of the bail 36 to disable the designation control. In another embodiment the slide associated with the control key 50 terminates in a hooked end similarly placed to that of the slide 65 so that depression of the key 50 completely disables the designation control. Specifications 265,135, [Class 106 (i)], and 380,777 also are referred to.