Patent GB-768516-A (GB)
Abstract: 768,516. Calculating-apparatus. NATIONAL CASH REGISTER CO. April 18, 1955 [June 3, 1954], No. 11052/55. Class 106 (1). A totalizer in a calculating machine is selected for actuation in dependence both on the columnar position of a travelling recordmaterial carriage and on the amount set up on the keys. The invention is embodied in the full-keyboard machine described in Specification 680,992 having several totalizers which may be selected for actuation under the control of plates secured in stops 70 on the paper carriage. A control plate (not shown) is arranged in a stop 70 to ensure that all of the amounts printed in the corresponding column are entered into the No. 9 totalizer. If a further control plate 69 having a long projection 68 is also present, amounts of 25 cents or of 30 cents or more are also entered into the No. 8 totalizer. The total of the amounts less than 25 cents may then be found by subtracting the amount registered by the No. 8 totalizer from that registered by the No. 9 totalizer. Totalizer-selection control by amount keys. If an amount less than 25 cents is set up, a control plate 16 arranged alongside the stems of the tens column of keys and apertured to receive studs 12 in those keys, is free to move to the right, Fig. 1, in the machine cycle, the plate being unobstructed by the studs 12 in the 10 and 20 cent keys. The plate is moved by a spring 34 under the control of the key-lock shaft 29 which is oscillated in each cycle to allow counter-clockwise movement of a shaft 25 carrying an arm 24 embraced by studs 22 in the plate 16. The shaft 25 is also connected to a pitman 36 so that when the plate 16 moves to the right, the end 39 of the pitman is withdrawn from co-operation with the selection mechanism for the No. 8 totalizer to prevent its selection. Pivoted on the plate 16 is a member 18 which co-operates with the stud 12 in the 20 cents key and, by means of an offset portion, with a stud 21 in the 5 cents key, in such a way that if both of these keys are depressed, the plate 16 is blocked against movement by its spring 34, and the pitman 36 remains in effective position. The studs 12 in the 30-90 cents keys co-operate with the corresponding apertures in the plate 16 so as to hold it stationary when any one of those keys is depressed. Further arms on the shaft 25 co-operate with control plates associated with the higher orders of keys so that. if any one of the latter keys is depressed, movement of the shaft 25 and pitman 36 is again prevented. Carriage control of totalizer selection. The control plate 69 and a non-add control plate (not shown) for the No. 8 totalizer are sensed by feelers 59, 53 respectively, pivoted to levers 61, 56 released during each cycle by a bar 67 for counter-clockwise rocking under the action of springs 66. A lever 44 is pivoted on the feeler 53 and pin-and-slot connected to an arm 46 which rocks about a fixed pivot 47 and is also pivoted to the feeler 53. The arrangement is such that if (a) the feeler 59 engages a long projection 68 of the plate 69, and (b) the end 39 of the pitman 36, controlled as described above by the amount keys, blocks the free end of the lever 44, then the rise of the feeler 53 will be limited and it will assume an add position. Otherwise, the feeler 53 will complete its movement into engagement with the non-add control plate. The lever 56 of the feeler 53 controls, by means of a lever 74, known totalizer engagement mechanism for the No. 8 totalizer.