Patent GB-553057-A (GB)
Abstract: 553,057. Calculating apparatus. NATIONAL CASH REGISTER CO. Aug. 1, 1941, No 9808 Convention date, Aug. 2, 1940. [Class 106 (i)] A printing calculating machine with one or more totalizers is provided with a main actuating means for the printing mechanism, auxiliary actuating means for the totalizer, means normally coupling both actuating means for unitary movement, and manipulative members to control the coupling means in such manner as to cause, from the data entered, a value to be accumulated which is different from the value that is printed. In the application to a standard type of accounting machine as described in Specifications 28253/08, [Class 106], 461,347 and 509,042, for posting and totalling the number of hours and minutes worked by each employee in a given period control keys are provided for the A.M. and P.M. periods to control the connections between main and auxiliary differential actuators so as to cause the proper times to be recorded and the computed elapsed times to be accumulated. The machine shown has two totalizers, a balance totalizer No. 1 and an adding totalizer No. 2 and is provided with a travelling carriage tabulated automatically or manually by known mechanism. The keyboard has banks of amount keys, a bank of operation control keys, a bank of symbol keys, four banks of time keys for the units and tens of minutes and hours, and an A.M. key and P.M. key. Keyboard, and differential mechanism.-The amount key banks and the banks of keys for units and tens of minutes are associated with actuating racks 76, Fig. 3, that are controlled by studs 65 on the key stems, the studs on the keys depressed engaging the appropriate steps 79 of the actuators to arrest their movement when operated in the usual manner by the bail member 88. The actuators are operatively connected to type sectors 93 associated with the usual impression mechanism. The keys, on depression, co-operate in the known manner with control, detent and locking plates to operate the zero stops 73 to free the actuators for movement and to lock the keys in position. At the end of an operation the parts are restored to normal by the actuation of a release shaft 112. 'In sub-total and total taking operations the release shaft 112 is operated at the beginning of the cycle to operate the zero stops to free the actuators for control by the wheels of the selected totalizer. The A.M. key 53 and P.M. key 54 are arranged in the same bank as the tens of minutes keys 52 and have separate detent plates 134, 136 that co-operate with stops 38 on the carriage to control the release of the keys 53. 54 in certain columnar positions only. The units of hours keys 55, Figs. 4 and 7, carry studs 157 that co-operate with the steps of a main actuator 166 and auxiliary actuator 159. The main actuator is formed with a slot supported on a stud 168 on the auxiliary actuator and at its rear end engages a sprinting sector engaging member. The auxiliary actuator is free of the printing sector but has a rearward rack extension to co-operate with the totalizer wheels. The main and auxiliary actuators are normally connected -by a latch 172 to move in unison ; the main actuator carries a block 177 which in the zero position engages a zero -stop .pawl 178. -Fig. 4, having a surface engaging an extension 179 of a pawl 180 .that co-operates with a block 181 on the auxiliary actuator. The steps on the main actuator are two places in advance. of those on the auxiliary actuator. The tens of hours keys 56, Fig. 8, carry studs 187 that co-operate with the steps of main actuator 191 and auxiliary actuator 189, Figs. 4 and 8, arranged for action in a manner similar to that described above in respect of the actuators 166, 159, except that the steps of these actuators are in alignment and are adapted to move in unison by a connecting latch 205. The actuators 191, 189 co-operate with stop pawls 218, 222 that operate in a manner similar to that of the pawls 178, 180. Compensating for change from A.M. to P.M.- When both A.M. time and P.M. time are recorded in one working period a corrective factor of 12 hours has to be added to the elapsed time. For this purpose the auxiliary actuators 159, 189 have to be disconnected from their main actuators 166, 191. The A.M. key 53 and P.M. key 54 carry studs to co-operate with the ends of a lever 232, Figs. 4 and 7, pivoted on a stud 233 on a vertical slide 234. The stud 233 engages a cam surface on a bar 237 mounted for sliding movement so that when both the keys 53, 54 are depressed the bar is displaced to rock interconnected arms 241, 243 to disengage the connecting latches 172, 205. If no keys are depressed in the units and 'tens of hours banks -the zero stops 178, 218 retain the main actuators in zero position but, on operation, the disconnected latches permit the auxiliary actuator 189 to move two steps until the block 181 engages the pawl 180 while the tens auxiliary actuator moves one step until its block engages the first notch 224 of the pawl 222. When any one of the keys 1 ... 7 in the units bank 55 is depressed the corrective number will be added to the value corresponding to the key depressed. When the No. 8 key 55 is depressed a a stud 258 thereon is moved into the path of a surface 257 on a pawl 252 'pivoted on the slide 234 and a lower projection 255 by engaging a block 256 on the auxiliary :actuator 159 obstructs movement of the actuator to maintain it in zeroposition. At the same time another stud 259 on the key displaces a bar 261, Fig. 8, which by its action through a stud 265 on the pawl 222 rocks the pawl to position the second notch 225 thereon in the path of 'the block 226 on the auxiliary actuator. Thus the tens auxiliary actuator moves two steps while the units auxiliary actuator is arrested causing 20 to be added which is 8 plus the correction12. When the No. 9 key is depressed it it necessary to add 21 and in this case a stud 266 on the key co-operates with a -surface 267 -on the pawl 252 to permit a one step movement to the auxiliary actuator 159. The key also acts on the bar 261 to move the pawl 222 to its second position for a two step movement of the tens auxiliary actuator. When the No.1 key 56 in the tens of hours bank is depressed the value 22 must be added : in which case the stud 187 on the depressed key enters a notch 249, Fig. 8, in the auxiliary :actuator which locates the actuator in its second position as the pawl 222 has been moved to inoperative position . The operation of the machine in connection with the Ledger Sheet, Fig. 2 (not shown), is described.