Patent GB-813083-A (GB)
Title: Calculating machines or similar accounting machines
IPC: G06C11/08
Filed: 1957-08-30
Abstract: 813,083. Calculating-apparatus. NATIONAL CASH REGISTER CO. A u g. 30, 1957, No. 27328/57. Class 106 (1). [Also in Group XXXVII] A calculating machine adapted to control another device, such as a tape punch, electrically has differentially settable switchselecting devices, each associated with a switch assembly having a switch for each differential position, and each carrying an actuating member, means being provided for driving the actuating members to cause thorn to actuatethe selected switches. The invention is applied to a machine generally similar to that described in Specification 732,760, and having a set of actuating levers 89 set under the control of a full keyboard and coupled to type-bars 104. Setting data switches.-The lower arm of each lever 89, Fig. 11, now carries a radial pin 113 on which is slidable a sleeve 115 having a groove 116 engaged in a corresponding slot of a guide 118. The sleeve 115 moves over an assembly 138 of ten plunger switches (see Group XXXVII) and when the levers 89 have been differentially set, the guide 118 is lowered to cause the sleeves 115 to depress the switches over which they have been placed. Each depressed switch completes two circuits (which may be connected in parallel). Early in each cycle, rockers 201 are raised to restore the depressed switches to " open " condition. Three further switch assemblies are set as described below in accordance with the type of operations performed. Distinguishing marks.-Two symbol printing type-bars are provided. One of these, 238, Fig. 8, is set by a lever 247, 248 having an ear 254 which moves. against one of four staggered surfaces of a plate 253 so as to arrest the typebar in one of four positions. The plate 253 remains in the position shown in add, subtract and non-add operations and the lever 247, 248 is permitted only a small movement to place a blank type in printing position. In the second cycle of a total or subtotal operation of the A totalizer, a link 260, 262 rocks the plate 253 one step so that. an " A " is printed, but if a total or subtotal is taken from the B totalizer, "depression of the B key, Fig. 9 (not shown), rocks the plate 253 through an additional step to cause a " B " to be printed. Depression of a Void key 240 rocks the plate 253 still further through the linkage shown, to cause a type " V " to be moved to the printing position. A switch assembly 224 similar to those associated with the amount orders is associated with this type-bar 238 and is actuated in a similar manner by a sleeve 213 carried by a lever 210 carrying an ear 1316. In each operation, this is freed for counter-clockwise movement into abutment with one of four steps on a lever 313 held against the ear 254 and so positioned in accordance with the type-bar setting. The second symbol type-bar 317, Fig. 13, is positioned by a lever 232, Fig. 10. In add operations, the lever 232 can only move a small distance against the end 334 of a link 332 carried by an arm 329 which abuts a surface 335 of a plate 336. A blank type is thus placed in printing position. Depression of the subtract key 244 rocks the plate 336 so that the arm 329 can move against a surface 357, thus allowing the lever 232 a greater movement to cause a " - " sign to be printed. On depression of the Total key, a link 361 is shifted and rooks a link 363 pivoted with the link 332 in the arm 329. By virtue of a stud 366, the link 332 is rocked to one side and the lever 232 is allowed to rock into abutment with a surface 365 to cause a " + " to be printed. Depression of the subtotal key acts through a link 369 to rock the link 363 further so that its surface 370 arrests the lever 232 when a type " S " is in printing position. In total and subtotal operations, if the total is negative, the plate 336 is rocked as in subtraction and the lever 232 is permitted an additional step of movement to cause " CR " and CR " symbols to be printed respectively. Finally, in a non-add operation, depression of the key 246 rocks the link 332 clockwise and the lever 232 moves into abutment with a surface 381 so that the non-add symbol is printed. Two switch assemblies are operated in parallel in accordance with the setting of this second symbol type-bar in a similar manner to those of the amount orders. One of the actuating sleeves is carried by the lever 232 which positions the type-bar while the other is carried by an arm secured to the lever 232. Interlocks.-While the tape punch is operating, a solenoid 382, Fig. 5, is energized and acts through a spring to urge a latch 392 to move beneath an ear 68 of the known trip member 37. Thus, after the completion of a machine cycle, the trip member 37 cannot be lowered to engage the machine clutch and close the motor switch until the punch has completed its operation. Operation of the punch may be initiated by a switch closed momentarily by cam means, Fig. 2A (not shown), at approximately the mid-point of the cycle. A latch operated by the total-taking mechanism prevents closure of this switch during the first cycle in total-taking operations. The motor circuit of the machine includes a switch in the punch, which is opened during operation of the punch, and a machine-controlled switch in parallel. The latter, Fig. 2A (not shown), is closed at mid-cycle and latched until the end of the cycle when it is freed.