Patent GB-427722-A (GB)
Abstract: 427,722. Calculating-machines. NATIONAL CASH REGISTER CO., Dayton, Ohio, U.S.A.-(Assignees of Christian, R. A. ; 246, Telford Avenue, Dayton, Ohio, U.S.A.) July 31, 1933, No. 21433. Convention date, July 29, 1932. [Class 106 (i)] In a calculating-machine having one or more add-subtract totalizers and other totalizers controlled by control keys and by stops on a travelling carriage, and in which the carriage is tabulated to print balances in an offset position relatively to the listing position, interlocks are provided between certain (e.g. the adding and subtracting) control keys, the release bar, and means positioned by the carriage, whereby depression of the release bar is permitted after depression of one of the said control keys with the carriage in listing position but is prevented when the carriage is in total-taking position. The invention is described as applied to a machine of the Ellis type forming the subjectmatter of Specifications 28253/08, [Class 106], 348,105, and 420,807. The machine prints the various items one below another on a ledger sheet, Fig. 30, and the total therebeneath, in offset position when positive. The machine cannot be released for an add or subtract operation while the carriage is in position to print a total. Totalizers. The machine is provided with four totalizers ; a balance totalizer serving to accumulate all the items and controlled for addition by stops on the travelling carriage, for subtraction by a " Check key and for total-taking by a " Balance " key; a grand totalizer selected by the " Balance " key and serving to accumulate the sum of the positive totals cleared from the balance totalizer ; a totalizer selected by a " Deposit " key to accumulate all positive items ; and a totalizer selected by the " Check " key to accumulate all negative items. Printing totals and subtotals.-Total and subtotal operations are initiated by depressing the usual control keys and release bar, and overdrawn balances are printed in a distinctive colour under the control of an " Overdraft " key in the manner described in Specification 420,807. Printing balances in offset position. The travelling carriage is normally held in one of its listing positions by the abutment with a plunger 600, Fig. 31, of the left hand lug 625 of one of a number of stops 624 on the usual tabulating stop-bar 127. Upon the depression of the " Balance " key 292, Fig. 35, or the " Tabulating " key 590, the plunger is momentarily lowered by a beam 595 and the stop-bar moves to the left until arrested by the abutment of the right hand lug 625 with the plunger. The tabulating beam 595 is controlled by a lever 586 provided with two byepass pawls 585, 688, the former cooperating with an arm 583 rocked by the " Balance " key, the latter with a stud 589 on the " Tabulating " key. An extension 592 on the pawl 588 co-operates with a stud 593 on the " Overdraft " key to prevent tabulation during an overdraft operation. After the printing of a balance in offset position, the carriage is automatically tabulated to the next column, the lever 586 being rocked for this purpose by a hook 606 pivoted to a main rockarm 84 and adapted to take over a stud 607 on the lever. In listing operations, this tabulating action of the hook 606 is rendered ineffective by a lever 609, the end 612 of which screens the stud 607. In the total-taking position of the carriage, however, this screening lever is moved out of the path of the hook by an arm 575, Figs. 33 and 35, rocked by a lug on the stop 624, and the hook becomes effective to tabulate. Machine release. The release bar 66 is normally locked by the abutment of a stud 383, Fig. 33, with a shoulder 382 on a locking plate 375. This lock is disabled when the carriage is in listing position by a lever 381, Figs. 31 and 33, that is rocked clockwise by a lug 626 on the stop 624 and, through a link 380 and arms 377, 373 on a shaft 372, rocks the locking plate 375 to ineffective position. Depression of the " Deposit key 132 or " Check " key 144 rocks an arm 613 and through a lever 615, 617 thrusts a wedge 618 upwardly between studs 620, 621 on locking plates 375, 622, respectively, thus rocking the plate 622 clockwise. In the listing position of the carriage, this movement of the plate 622 is idle and the release bar is free to initiate an add or subtract operation. However, in the offset or balance printing position of the carriage, the locking plate 375 is rocked further clockwise by the engagement of lever 381 with a lug 627 on the stop. Now, upon the depression of the " Deposit " or " Check " key, the plate 622 is rocked far enough to interpose a shoulder 623 thereon above the stud 383 and lock the release bar. Interlock between adding and subtracting control keys. These keys are not released at the end of an operation, however, depression of one key releases the other. Upon the depression of the " Deposit " or adding control key 132, Fig. 13, a stud 192 thereon rocks the latch 146 of the " Check " or subtracting control key 144 to free the latter. Conversely, upon the depression of the " Check " key, a stud 195, thereon, rocks a plate 194, a stud 196 on which serves to disable the latch 135 for the " Deposit " key. The " Check " and " Deposit " keys are also releasable by depression of any other control key in the bank, or by the " Balance " key 292 or " Subtotal " key 392, depression of either of which rocks a lever 416 clockwise and through studs 199, 417, thereon, disables the latches 146, 135. Interlock between the " Overdraft " key and the adding and subtracting control keys. The " Overdraft " key is formed telescopic as described in Specification 427,792 to permit the main stem to rise even if the finger plate is held depressed. Depression of the main stem is prevented, while the " Deposit " or the " Check " key is depressed, by a latch (not shown) rocked by the keys 132, 144, Fig. 13, through studs 468, 469, arms 470, 472 and shaft 473. Interlock between the release bar and the adding and subtracting control keys. Depression of the release bar 66, Fig. 14, shifts a detent plate 245 to the right, in which position locking hooks 243, 244 on the plate take over or under studs on the " Deposit " and " Check " keys 132, 144. Printing distinguishing marks. The depres. sion of a control key, Fig. 14, differentially positions a cam plate 264 and thereby adjusts a type-sector 273 to print a symbol indicating the operation initiated by the key depressed. The ribbon mechanism for printing negative totals in a distinctive colour is further controlled by the " Check " key to print negative items also in distinctive colour. Interlock between the release bar and the date-setting means. Type sectors 509, Fig. 4, for the date are set by levers 491 .. 493 in the usual manner and are resiliently held in set position by justifying pawls 496 engaging toothed sectors 495. Upon the depression of the release bar to initiate an operation, an arm 251 is rocked clockwise to engage the pawl and thus lock the adjusting means.