Patent GB-191328399-A (GB)
Title: Calculating Machine.
Inventor: GATEWOOD WILLIAM FLEMING
IPC: G06C7/08
Filed: 1913-12-09
Granted: 1914-12-09
Abstract: 28,399. Gatewood, W. F., and McAdams, J. D. Dec. 9. Adding apparatus with operating-means.- Relates to single-bank key-set independentlyoperated printing adding - machines in which selection of the denomination is effected by causing a carriage bearing the totalizing- counter with the associated actuating rack-bars to move laterally step-by-step as the keys are successively depressed, whereby the rack-bars are in turn released and set by their springs to positions corresponding to the keys depressed. Differential mechanism.-Depression of any key 6, Fig. VI, raises the stop 9 at the other end of the lever, the levers being bent so that the stops may lie in a row, and also rocks a yoke 25 about a pivot 26 so as to raise a tripping-device 23 at its rear end and cause a projection 22 upon the front thereof to displace the retaining-pawl 16 of the rack-bar 13 at the actuating-point. This bar is then drawn rearwards by its spring 15 until a lug 19 thereon meets the raised stop 9 of the key. Selecting denomination.-The rack-bars are mounted in the carriage 4 that is movable laterally across the machine by means of a spring 62, Fig. IV, attached to a sector 60 engaging the retaining-plates 10 for the rack-bars, and controlled by an escapement deriving movement from a yoke 66, Fig. VI, and the forward yoke 25, which move together. Each yoke has vertical teeth 69, Fig. XIII, and pins 70, cooperating respectively with a lug 74 and a spring pawl 71, both on the carriage. During the operation of the main handle 40, the tension or the displacing-spring is first relaxed and a restoring-spring 64 is put under tension, whereupon the carriage returns to the right. The tension of the springs is then reversed. Totalizing-counters; operating-means. - Depression of the main operating-handle 40 causes a sliding member with end wall 45, Fig. V, and side plates 46 to move forward, picking up lugs 20 on the displaced rack-bars and restoring them, the receiving-pinions 32 of the totalizer wheels 34 having previously been lowered against supporting-springs by the engagement of pins 37 upon the side-members 35 of the vertically-movable totalizer frame with guide-slots 50 secured to the side-plates. During the restoration of the rack-bars, -the totalizer is thus actuated. Error-keys.-Depression of an error-key X, Fig. V, rocks switch pawls 51, whereby the totalizer-depressing pins 37 are prevented from moving into the guide slots when the main handle is operated. The ends of the levers 55, Fig. X, that displace the switch pawls rock arms 111 fixed to pivoted levers 106, thereby determining the ineffective passage of printing- impression operating-pins 109 upon the main slide through slots 110 in the levers 106. Transfer mechanism.-Transfer lugs 76 upon the totalizer-wheels engage and press rearwards projections 87, Fig. XI, thereupon freeing a dog 75 from an abutment bar so that it may be drawn down by a spring 80 to effect transfer by means of a tooth 88. The descent is limited by a plate 81 underlying pins 84 upon the dogs, and during the movement of the main slide the plate is rocked upwards to restore tripped dogs. Printing totals and sub-totals. -Depression of the total-key yoke 123, Fig. V, releases all the rack-bar retaining-pawls 16 of those rackbars alined with the totalizer, the carriage having been previously spaced beneath the totalizer to the proper extent. The totalizer is also depressed so as to engage the rack-bars, which move rearwardly until lugs upon the numeral-bearing drums 34 are arrested by stops 94 with the total types at the printing-point. Operation of the main handle will cause the total to be printed, and if the total-key is held down throughout, the total will be registered again upon the totalizer. Printing-mechanism.-The rack-bars carry, at their rear ends, the type shown in Fig. VI, from which an impression is taken, before restoration, bv means of a pivoted printing frame 95, Fig. V, when a pin 109 upon the main slide rocks a lever 106, pivoted to a fixed side plate, and so forces down a pin secured in the forward end of the printing-frame. The frame carries a paper-roll with feeding-means, and also an inking-ribbon. Upon the .return stroke of the main slide the lever 106 rocks idly.