Patent GB-371412-A (GB)
Abstract: 371,412. Cash registers &c. NATIONAL CASH REGISTER CO., Dayton, Ohio, U.S.A.-(Assignees of Robertson, W. H. ; 1302, Patterson Road, Dayton, Ohio, U.S.A.) Jan. 22, 1931, No. 2166. Convention date, Jan. 27, 1930. [Class 106 (i).] The taking of a total from a transaction totalizer is necessarily followed by the entry of this total in the grand totalizer. The machine performs two cycles of operation for sub-total or total-taking but when the total is to be taken from a transaction totalizer a third cycle automatically succeeds the two total-taking cycles for the purpose of entering the total in the grand totalizer. The invention is described as applied to the machine forming the subject-matter of Specifications 285,500 and 286,314, [both in Class 106 (i), Calculating &c.]. General description. As in the above Specifications, the machine has banks of amount and transaction keys 36, 37, Figs. 2 and 3, but in place of the total lever there are provided a total key 41, and a sub-total key 40, Fig. 14, and below these is a non-add key 39, Fig. 9. The transaction keys select their corresponding totalizers which are of the usual interspersed type, but the first totalizer, selected by key 38, is allotted for accumulating grand totals. Amount differential mechanism. The adding sectors 68 of the amount banks each carry a radially slidable abutment bar 66, Fig. 2, the end 70 of which is adapted normally to cooperate with the zero stop pawl 61 or with a depressed key stem. By means described later the bar may be slid inwardly and held by a detent 69, in order to allow the differential to range over the bank independently of any depression of keys. Transaction differential mechanism. A differential arm 162, Fig. 3, supports a pivoted latch 160 controlled by a spring 163 and adapted to sweep along the line of key stems. The latch and arm are driven by a flange 167 of a plate 168 fixed to the shaft 65 rocked at each operation of the machine. When the latch meets a depressed key it shifts counterclockwise to be free of the flange and to be locked against a stationary notched bar. Pivoted to the arm 162 is a minimum-movement beam 180 forked at 183 to embrace a pin on the toothed sector 179. At each operation and after the latch has been tripped, a roller 177 mounted on a lever pivoted at 89 is operated by cams on the main shaft 80 to re-position the beam and therefore the toothed sector, the totalizer line, and the indicating and type elements. Kind-of-operation control mechanism. The sub-total and total keys 40, 41 determine the extent of movement in a counterclockwise direction of an arm 635, Fig. 14, carrying a latch 633. Connected with this arm is a totalcontrol lever 646, Fig. 12, a stud 667 of which serves to operate the lever 133 controlling the position of the pin 127 with respect to the totalizer-engaging timing-control devices for adding, sub-total and total operations. Sub-total and total operations. Depression of key 40 or 41 rocks, through lever 588, Fig. 20, a lever 593 to cam upwardly a slide bar 598 the end 605 of which normally disables a clutch pawl 606 to prevent the shaft 80 from driving gears 613, 617 and cams 618, 619, Fig. 14. With the key 40 or 41 depressed therefore these cams are rotated and the cam groove 619 acting through an arm 621 and pin-and-slot connection 632 rocks an arm 624 controlling the differential arm 635. The gear 617 receives a complete rotation in a two-cycle (sub-total or totaltaking) operation and at the beginning of the first cycle the arm 624 is rocked counterclockwise and through its nose 640 draws the latch 633 to the position marked 1 (corresponding with non-adding). Near the end of the first cycle in a sub-total operation the arm 624 moves farther until at position 2 the tail 637 of the latch meets a stop 641 whereupon the latch is disengaged from the driving arm 624. If the operation is for taking a total the stop 641 is withdrawn by the depression of key 41 to allow the latch to travel to position 3. The differential movements of the arm 635 are transmitted to a shaft 661 through an arm 649, Fig. 9, carrying a link 648 having a pin 647 engaging a cam slot 659 in an arm 660 fixed to the shaft 661 and the differential rocking movements of the latter are conveyed through an arm 666, Fig. 12, to the total-control lever 646. To prevent stopping of the machine at the end of the first cycle, the release latch 545, Fig. 12, rocked by the motor key 42 to allow the pitman 541 to descend and free the clutch &c. for operation, is prevented from returning to normal position in readiness to retain the pitman when raised at the end of the cycle. This prevention is effected by the positioning of the total-control lever 646 for a sub-total or total operation, its arm 668 rocking a shaft 735 clockwise to engage a pin 736 with a hook 738 of the latch lever to hold it against return. The pin also obstructs the tail 740 of the non- repeat pawl 741 to disable it from retaining the pitman when lifted. The shaft 735 when rocked also effects, through a pin 752, and slot 753, Fig. 3, the locking of the transaction bank of keys. To prevent interference of accidentally depressed amount keys with the free movement of the differentials during subtotal or total operations the bar 66, Fig. 2, previously referred to, is forced inwardly at the end of the first cycle, by the movement of the total-control lever 646, a stud 749, Fig. 12, on which rocks a shaft 745 counterclockwise so as to rock clockwise bifurcated arms 747 embracing ears on the bars 66. Total-transfer operations. For these, the desired transaction key and the total key 41 are depressed and as a result the machine performs three cycles, the first and second being for the purpose of taking the total from the selected transaction totalizer and the third for entering this total (now standing in the indicators) in the grand totalizer. For operations other than these the total-transfer control lever 107, Fig. 20, is prevented from moving by various controls. If the total key is depressed one of these controls namely the lever 642, Fig. 14, is removed but another, the lever 772, Fig. 20, remains effective unless a transaction key (other than the grand totalizer key 38) has been depressed. The lever 772 is controlled directly by a notched disc 781 fast on the transaction indicator shaft 141 so that only when a transaction key 37 has been depressed is the lever rocked to free the control lever 107. In a total transfer operation therefore, both levers 642 and 772 are removed by the setting of the keys 41 and 37 but rocking of the control lever 107 is still prevented during the first two cycles by the cam 618, Fig. 14 which stands in the path of a pin 783 on the lever. Towards the end of the second cycle however the pin is freed by the cam and the lever 107 rocks clockwise. In consequence the ear 765 is placed between the levers 642 and 772 and another ear 787 enters between arms 785 and 788 to prevent restoration of the shafts 735, 745 and ensure continuance of the drive for the third cycle. At the end of the second cycle the total key 41 is released by the stud 724, Fig. 14, rocking the key detent 581 and the drive of the cams 618, 619 terminates. The machine then proceeds to perform an ordinary adding operation the transaction total now appearing on the indicators being entered in the grand totalizer through the action of the coupling pinions 86. The latter are held in engagement during the third cycle by the control lever 107, the link 105, Fig. 20, carried thereby, displacing .a coupling pin 104 which normally conveys the engagement-timing motion. At the end of the cycle the lever 107 is restored by a cam 795 and the coupling pin resumes its normal position. To effect the automatic selection of the grand totalizer in the third cycle, the differential latch 160 of the transaction bank is caused to break in the first position (key 38) during this cycle, by an arm 797, Fig. 3, held off during the first two cycles by a curved edge of the total control lever 646. Non-add arrangements ; key-locks. By depressing the non-add key 39, Fig. 9, the lever raises the coupling pin 647 and cams the totalcontrol lever 646 to the non-add position with the pin 127, Fig. 12, out of operation. The key 39 is held depressed by a detent 812 rocked to release the key at the end of the cycle by the pitman 222. To prevent simultaneous use of the non-add key and either key 40 or 41 a lever 675 pivoted at 676 is controlled in position by the lever 588, Fig. 20, rocked by the keys 40, 41. When the non-add key is depressed its pin 815 wipes along an edge of the lever 675 and so prevents its movement and that of the keys 40, 41. If one of the latter is first depressed the lever 675 seizes by a notch the pin 815 to look the non-add key against depression. The non-add key is also locked, when the machine starts to operate, by a detent lever 702 obstructing another pin 703 on the key. The keys 40, 41 are similarly locked during an operation by an arm 726, Fig. 14, carrying a pin 725 to engage a hooked extension of the key detent 581. The Specification as open to inspection under Sect. 91 (3) (a) comprises also means for counting separately the number of depressions of each key 40, 41. This subject-matter does not appear in the Specification as accepted.