Patent GB-190516651-A (GB)
Title: Improvements relating to Adding Machines.
Filed: 1905-08-16
Granted: 1906-10-16
Abstract: 16,651. Lake, H. H., [Bundy Manufacturing Co.]. Aug. 16. Calculating-apparatus; counting-apparatus.-In a multiple-bank, keyboard, printing, lever-operated adding-machine, improvements are described in connexion with : (1) the keyboard and stops, (2) the driving and differential setting of the item and totalizing elements, (3) the transferring and (4) the zeroizing of the totalizing-counter, with interlock for the latter, (5) the repeating and erasing means, (6) the movable printing. carriage with paper-feed, (7) the printing-hammers contained therein and the trip mechanism placed in the main machine, (8) the "clear" signal, (9) the means for naming each item, (10) the operation counter, and (11) the hand and automatic ink-ribbon feed. The machine, shown in longitudinal section in Fig. 6, has a hand-lever shaft 15, main shaft 14, main cam-shaft 95, other principal shafts 76, 126, 128, item type-segments 5, 8, and totalizing printing- wheels 7; the carriage 12, which is shown with its printing-hammers 6 in position to record an item, is slid to the rear when a total is required and cooperates in each position with the corresponding hammer-trips and inking-ribbon, of which two complete sets are mounted in the main casing. (1) Each key-shank has a pin adapted to depress a locking-bar common to the bank and mounted on parallel links 46, thus bringing small pins into recesses in the shanks to lock the depressed key down and the others up. The projecting ends of depressed keys form stops for the arms which set the registering-parts, and the arrangements for each denomination are identical. In each bank, the normally-operative zero-stop 55 is displaced by the locking-bar when a key is depressed, while the extreme motion for registering 9 " is determined by a fixed stop, the corresponding key merely acting on the locking-bar. (2) The subsequent driving and setting is effected by drawing the handlever forward, thereby giving the main shaft twothirds of a revolution, the return stroke made by a light spring completing the turn, and the setting- levers 60 sweeping forward with,their shaft and' rotating the item segments and totalizing-wheels as shown until arrested by an operated key, when they are freed from their driving-members and become locked. The fast and slow motion of the main shaft in constant direction as shown in Fig. 4 is produced by inner and outer curved racks 21, 22, radially moved and locked upon the arm 17 by the pin and slot 25, 24 and the toothed arm 16 engaging with a locking lever 28, of which the position is controlled by pawls and pins on the framework. Engagement with a key-stop throws over the triplevers 61, carried by the loose levers 60, locking them against the rack 70 and throwing their arms 62 into channels in the driving-elements, which are fast on the shaft and therefore do not stop. But before even a zero engagement can occur, the main cam shaft slightly rocks the spindle 92 of the item-segments so that their zero type may come into the printing-line and their racks 8 gear with the intermediate totalizing-wheels as the former begin to move, and also put the detents 104 into play. Cam-operation of the shaft 76 and attached link-work is employed to return the setting-levers and re-engage their trips with the zero-stops. (3) For transferring on the totalizing-counter, special. wheels 112 have transfer pins rocking the transfer levers 121 to carry the pivoted bridge-pieces 116 to the left and enable the staggered tappets 121 subsequently to depress the sliding transfer racks 139 which are previously put into gear with the proper wheels by a small motion of the shaft 128. This is derived from the main cam-shaft 95, which also rotates the tappet shaft 126 and, finally, positively restores all the racks by a yoke 440. One arm of the transfer lever engages with a locking-lever 118, which is returned to the position shown either by a 'yoke actuated at the end of the tappet-shaft movement or by the yoke 137 during zeroizing, and ensures normal position for the associated elements. (4) To zeroize the totalizing-wheels, a small hand-crank rotating the shaft 135 swings each arm 169 forward, and its end, moving circularly over a quadrant of the intermediate totalizing- wheels as determined by the pin and slot shown, carries a pin 173 to zero position. The interlock between the zeroizing and main hand-lever shafts consists of parallel segmental plates 176,177, Fig. 35, thereon, and a sliding locking-pin 179 co-operating with recesses in the plates. (5) Repeating and erasing are both effected by the aid of a yoke 186 which at the end of each operation is normally forced forwards by a wheel and pin 184 on the main shaft and the lever 188 to throw all the locking- pawls of the keyboard locking-bars 54 out of gear. Depression of the repeat key 193 prevents this by displacing the lever, while the erasing-key will specially operate the lever, provided the main shaft is in the inactive position, i.e. with the gap in the wheel rim opposite the lever end. (6) The printing-carriage 12 is slid rearwards by hand along the rods 203 to record totals, and its cover with most of the contained parts rotates about a rear hinge for purposes of inspection when the catch 230 is released by hand movement of the shaft 221. The paper passes through guide-rollers, around and above the main feed-roller 211, and away past a stationary guide-plate which may serve as a cutting-edge, an opposite movement of the shaft 221 lifting the upper rollers for adjustment. Feeding is accomplished either by hand or by the pawloperating lever 236, Fig. 4, which is normally lifted by a cam-shaft-operated link 247, but is moved before and after the impression of a total by a fixed pin 242 contacting with its bevelled head. (7) The printing-hammers 6 have a spring connexion freeing them at impact, and are thus moved. The item-segments passing beyond zero depress, by means of pins 281, depending arms 292, and links 276, the forward ends of corresponding trip-levers 272, whereby the trips 271 are raised, and at a subsequent forward rocking of the arms 281 due to the cam shaft they engage the hammer rocking-pieces 258 and the impression is made on the return movement due to the springs 260, adjustable as to tension by the yoke 261 to which they are attached. Similar trip-levers and trips at the rear for totals are set by the zeroizing-pins on the intermediate totalizing-wheels, and suitable cross rods 259, 295, 315 are employed throughout to couple the wide-spaced item and adding members to the proper hammers. In order to print zeroes to the right, adjacent links 276 overlap by means of pins. (8) The " clear signal on the plate 320, Fig. 4, is set by a pin and disk on the zeroizing- shaft 135, but displaced by movement of the lowest trip-lever link. (9) A printing-wheel for naming the items is set by the slide 358, Fig. 7, shown in its inoperative position but returned after the printing of. an item to a second or "ditto " setting determined by the pivoted spring stop 359. The corresponding hammer trip does not act during the movement for a total, and is controlled through a lever and pin by a disk recessed to give no impression or a gentle one, respectively, for the first and second positions of the slide. (10) The operationcounter is driven by the pin and pawl-lever 389, 388, Fig. 4, as the hand-lever moves, and has known transfer and spindle - zeroizing means. (11) The ink-ribbons for the total and item lines are stighly inclined, the former being fed by hand and the latter by the automatic arrangement shown in Fig. 23, in which the contact of studs 437 on the ribbon with pins 428 determines engagement of the proper set of feeding and detent pawls 421, 417, operated by rods 420. A snap action is produced by a link bearing a roller 436 in an aperture of the coupling-bar 430, and controlled as to position bya a locking-spring 438. In a modification, admitting of printing upon any part of a wide sheet, a subsidiary carriage is adjustable by a scale transversely upon the main one, and contains besides the feed-rolls and associated mechanism a receptacle for printed paper. A splined shaft, movable longitudinally with respect to a collar thereon, operated by the paper-feed parts described, ensures actuation of the feed-roller in any position, and adjusting- means consisting of a cam engaging a pin on the feed-pawl are also provided. Specifications No. 4663, A.D. 1879, [Abridgment Class Mechanism &c.], No. 13,316, A.D. 1900, No. 409, A.D. 1903, and No. 3761, A.D. 1905, are referred to.