Patent GB-917031-A (GB)
Title: Improvements in or relating to combination calculating and recording machines
IPC: G06K13/26
Filed: 1960-08-04
Abstract: 917,031. Selective printing. BURROUGHS CORPORATION. Aug. 4, 1960 [Aug. 5, 1959], No. 27113/60. Class 100 (4). [Also in Group XIX] A full keyboard calculating and recording machine has code discs differentially set by the actuators and each having groups of elements projecting therefrom, the code discs being moved against punches so as to punch a tape in code. Differential mechanism.-A cam-controlled rod 363, Fig. 16, by engaging in a slot 365 of each of a set of cam arms 364 pivoted at 355 to power sectors 354 rotates the latter counterclockwise. An actuator 350 controlled by a common bar 356 is urged to follow each power sector by a spring 366 and a stud 367 in the actuator, is engaged in a slot 368 of the cam arm as shown. A stop bar 353 is coupled to each actuator 350 and when it is arrested by the stem of the depressed key, the stud 367 cams the cam arm 364 upwardly and enters the lower part of the slot 368. A tail 364A of the arm 364 engages in a notch of a plate 369 to retain the power sector 354 in its differential position and the raising of the arm 364 enables the rod 363 to escape from the slot 365 and complete its movement. Initially, the type bars 400 coupled to the power sectors are below the printing line but the additional step of movement performed by each power sector after the arrest of its actuator brings the correct type to effective position. A slotted shaft 370 is rocked to align-the actuators prior to the engagement of the totalizers and also serves normally to space the actuators correctly from each other. The power sectors 354 are also located in differentially set positions by a bail 823. The machine has four actuators as shown for the entering of amounts into the totalizers, three modified differential mechanisms associated with overflow orders and six further orders similar to that shown but for the control of printing mechanism only. Hammer impression mechanism.-In each cycle, a bail 406 allows hammers 402 to rock clockwise but initially these are restrained by latches 426. The frame 408 tensions springs 404 tending to throw the hammers clockwise. In each order in which the actuator 350 has moved beyond the zero position, a pawl 440 when moved upwardly by the rocking of a shaft 438 engages the latch 426 so as to free the hammer which thereupon throws the type bar 400 against the action of a light spring 414 towards the platen 500. Before the type bar strikes the platen, a tail of the hammer engages a frame plate 410 and the type bar continues its movement under its own momentum. The hammers are reset by the bail 406. Selected ones of the pawls 440 may be blocked by levers 1450 controlled by cams on a shaft 460 rotatable to different positions by mechanism, Fig. 20 (not shown), controlled by one of the function control slides described below under " operation control mechanism". Controlling zero printing.-The right-hand order printing mechanism, numbered 15 in Fig. 19, prints A or B symbols in total-taking to indicate which totalizer is involved and the adjacent order mechanism 14 prints a symbol indicative of the operation and is controlled by the left-hand column of control keys. The next thirteen orders, numbered 1-13 from the lowest (right-hand) order upwards, are controlled by the thirteen columns of amount keys. The hammer control latches 426 for the symbol order 14 and for order 1 are connected to links 449 which are notched for co-operation with an ear 456A of a lever 456 pivoted at one end of the link 449 for the order 14 and controlled by a cam 459 on a shaft 460. In total and sub-total operations, this shaft is rocked and the ear 456A is lowered to couple the links 449 so that the order 1 hammer will be released even if zero is registered in that order. The order 2 latch is also pivoted to a link 449 and this link is permanently coupled by a stud 454 to the link 449 of order 1 so that whenever either of the hammers for orders 1 and 2 is released, the other will be released also. An arrangement similar to that controlling the latches for the orders 1 and 14 is provided for the latches for the orders 4 and 5 so that, again under the control of a cam 459 on the shaft 460, in total-taking operations when a total is taken from the seven orders of a totalizer, the latch for order 4 may be released whenever the order 5 latch is released. Normally, the latch for order 4 is quite independent of the latch for order 5 since orders 5, 6 and 7 are used for printing numerical information which is not entered into a totalizer, these orders of the totalizer being overflow orders. Orders 8 to 13 are used only for printing numerical information which is distinct from that printed in orders 5 to 7. Except between orders 4 and 5 and between orders 7 and 8, the latches 426 have overlapping ears 426B so that within each of the three groups of orders-1 to 4, 5 to 7 and 8 to 13-zeros are printed to the right of significant digits. Extended total-taking.-The differential mechanisms for the orders 5-7 are modified to enable them to be used for controlling the printing of numbers which are not to be entered into a totalizer and also in total operations for controlling the printing of the overflow digits of the totalizers. In these orders, Fig. 17 (not shown), the actuator racks 350, Fig. 16, are separate from the members 352 coupled to the step bars 353 and each carries a pawl by which it may be coupled to the associated member 352. The pawls are rendered effective in total operations by the rocking of a control shaft. Line-spacing.-During each cycle, a roller 506, Fig. 22, in an arm 507 and carrying a pawl 504 is moved rearwardly and returned by cams, and the pawl, the movement of which is controlled by a roller 511, advances by one step a ratchet wheel 503 fast with the platen. Guiding inserted bills.-Bills may be inserted into a clear plastic shoot 520, Fig. 22, having pointed lower ends for separating two sections of ink ribbon 600, so that the inserted bill passes between them. During each cycle, the shoot is swung about pivots 523 out of the path of the type bars 400 by cam means which act through a yielding connection. Record strip.-This passes from a supply roll 540, Fig. 22, between guide plates, around the lower surface of the platen, where it is engaged by releasable pressure rollers, and over a table 562 to a take-up roll 564 driven by a belt drive from the platen. The table 562 which also supports the take-up roll 564 may be swung counterclockwise to facilitate the initial threading of the record strip. Ink-ribbon mechanism.-The ribbon passe between spools 601, 603, Fig. 26, both on the right-hand side of the printing mechanism and is guided by rollers across the latter and back again so that a bill may be inserted between the two passes of ribbon. A slide 612 carrying feed pawls 616, 619 is reciprocated in each cycle and a slide 634 is positioned so that one or the other of these pawls is effective to feed the ribbon in one direction at the other. When the upper spool 601 becomes empty, a feeler 644 enters a hole in the spool and rocks a pawl 650 to enable a pawl 654 carried by the slide 634 to engage a lug 633 on a slide 629 which is reciprocated with the slide 612. During the last part of that cycle, the slide 634 is thus raised to render the upper pawl 616 effective so as to cause the ribbon to be wound back to the upper spool 601. In the next cycle, the feeler 644 is cammed out of the spool 601 and when the lug 633 cams the pawl 654 clockwise the pawl 650 is able to latch it in effective position. A similar arrangement reverses the ribbon feed when the lower spool 603 becomes empty. Each spool is provided with a friction brake 667, 668. The two passes of the ribbon are supported on either side of the printing mechanism by guides, Figs. 25 and 27 (not shown), which are raised to cause a lower red portion of the bichrome ribbon to be effective by mechanism, Fig. 75 (not shown), conditioned by operation of either of the subtraction control slides described below. The ribbon is lowered rapidly after printing and before being fed. Date printing.-Manually adjustable date type wheels 700, Fig. 28, are carried by an arm of a lever 702 latched by a latch 704. In Total and Sale operations, a lever 719 is rocked by operation of one of the function control slides 1280-8 described below to raise links 734 and 716 which are reciprocated in each operation. The link 724 is thus caused to rock a lever 722 so as to load a spring 721 acting on the lever 702, and the link 716 trips the latch 704 so that the type wheels are thrown against the platen. A lever 732 is then rocked to lower the link 724 so as to release the spring 721 and a lever 734 is rocked so as, through a stud 734B, to restore the lever 702. Consecutive and machine number printing.- Counter type wheels are mounted and actuated in the same manner and at the same time as the date type wheels and are advanced by one unit each time they are actuated by the engagement of a stud in an actuating yoke with a fixed bracket. A slide which normally locks the wheels against rotation is disabled when the lever 719 is rocked to condition the date and consecutive number printing mechanisms for operation. The arm carrying the counter type wheels also carries three permanently set number type wheels for printing the machine number.