Patent GB-713408-A (GB)
Abstract: 713,408. Cash registers. NATIONAL CASH REGISTER CO. Nov. 6, 1952 [Dec. 11, 1951], No. 27937/52. Class 106 (1) A cash register comprises a machine release shaft normally locked by a member disabled under control of a motor bar and transaction controls keys, a further locking member rendered effective under the control of a certain transaction key to prevent release of the machine by the motor bar, and a mechanism actuated during a total-taking operation to disable the further locking member. The motor bar 105 in add operations also selects a "Groceries totalizer. Transaction starting keys 97 are associated with " Meat," " Produce," " Tax " and " Paid Out " totalizers respectively and include a " No Sale " key. An item totalizer has its total taken at the end of a multiple-item transaction by setting a total control lever 101 to an " Item" position and depressing the motor bar 105. A group totalizer receives all the amounts corresponding with cash sales. Specification 8119/15, [Class 106 (1)], is referred to. Control key interlocks.-A pin 99, Fig. 7, in the " No Sale " key is normally blocked by a projection 211 on a slide 210. However, when the total control lever is moved from its add position, a cam plate 224 carried thereby rocks a lever 220 which through a bail 216 shifts the slide 210 so as to free the "No Sale" key and place blocking projections in the path of pins 99 in the other transaction keys. A pin 100, Fig. 4, in the " Paid Out key co-operates with a cam surface 374 of a locking slide 371 so as to cause locking fingers 372 of that slide to move beneath studs 100 in the other transaction keys. The slide 371 is retained in the locking position as described below until a total-taking operation is performed. Machine release.-The motor is started and clutched to the main shaft in known manner when a shaft 70 is freed to rock clockwise. Such rocking of the shaft 70 is normally blocked by a pawl pivoted on a shaft 120 and rocked to ineffective position by operation of the motor bar 105 or of a release bar actuated by depression of any one of the transaction keys 97. The shaft 70 is also controlled by the means described below. Enforcing a sequence of operations.-After a "Paid Out" operation, a total must be taken before the entry of further items. If an item has been entered, the " Paid Out" key can only be depressed after a total-taking operation. Depression of the " Paid Out" key as described above moves the locking slide 371, Fig. 4, upwardly to the position shown to prevent depression of other transaction keys. During the operation, a stud 331 carried by the transaction differential mechanism 294 frees an arm 382 which is rocked counter-clockwise to the position shown by torsion springs 385, 389, Fig. 8, respectively connected between the shaft 166 on which the arm is mounted and a stud 386 in an arm 387 freely pivoted on the shaft 166, and between the arms 387 and 382. A flange 381 on the arm 382 is thus moved beneath a stud 380 in the slide 371 to lock it in its operated position. The slide 371 is mounted on a bar 363 and coupled thereto by a spring 375 which raises the bar 363 to the position shown at the end of the " Paid Out operation. A plate 366 coupled with the bar 363 is thus rocked about the shaft 120 into a position in which it blocks clockwise releasing movement of a plate 367 fast on the shaft 70. The bar 363 has a cam surface 364 which cooperates with the stud 100 in the " Paid Out" key so that the bar 363 may be restored to free the shaft 70 by a further depression of the " Paid Out " key to enter a further " Paid Out " amount or, by setting the total control lever in the "Item" position; to take a total of the " Paid Out " amounts. During such a total-taking operation, the shaft 166 is rocked clockwise in known manner and an arm 391 thereon engages the stud 386 in the arm 387 to restore this arm and, through the spring 389, the arm 382, to normal position, in which the arm 382 is held at the end of the operation by the stud 331 in the transaction differential mechanism. Thus when the "Paid Out" key is restored the slide 371 is free to be restored downwardly by a spring 373 and the bar 365 will remain in its normal position. All the transaction keys will thus be freed and the motor bar 105 will again be rendered effective. During a subtotal operation, restoration of the blocking arm 382 is prevented by a member 395 which when the arm 382 is released, is held in a clockwise position by a stud 397 in an extension 398 of the arm, so that a stud 400 in the member will be engaged by a shoulder 403, Fig. 7, formed on the total control lever when the latter is set to a subtotal position. The member 395 is thus raised so that an arm 396 blocks clockwise movement of the stud 397. During an initial item-entering operation, the arm 382 is freed as in a "Paid Out" operation, and the flange 381 moves above the stud 380 to lock the slide 371 in its lower position so as to prevent depression of the " Paid Out" key until after the arm 382 has been restored in a totaltaking operation.