Patent GB-191121592-A (GB)
Title: Improvements in or relating to Adding Machines.
Inventor: JUSTICE PHILIP MIDDLETON
IPC: G06C7/08
Filed: 1911-09-30
Granted: 1912-09-26
Abstract: 21,592. Justice, P. M., [Wendling-Hoch Adding Machine Co.]. Sept. 30. Adding-apparatus.-In machines of the type described in Specifications 7289/02 and 7290/02, a spring motor operates the parts, including the selector, the movement of which is controlled by a governor, and provision is made for operatively connecting the numeral wheels and the itemprinting sectors to effect the adding and printing of the item set. A locking-device is provided for the motor and is adapted to be released by the winding-means. Totalizing-counters. - The adding, transfer, and zeroizing mechanisms are similar to those described in the above-mentioned Specification 7289/02. Error-levers.-To correct an error in an item set, a restoring-lever C, Fig. 15, is rocked and thereby, through an arm 9 and slotted lever 10, a bail T with a blade 8 is moved across the selector pins 74 to reset the displaced pins. Printing-mechanism; printing totals. - The type sectors or carriers 100, Fig. 9, are con. nected by links 118 to the oscillating segments 78, and a platen and feed-roll are mounted on a swinging frame S controlled by a spring 126 and cam 42. The record paper is fed forward at each backward movement of the frame S bv means of a pawl 212 engaging a ratchet-disk 20. The platen is carried away from the type sectors by a pin 122 engaging a hook on the end of a bar 119 connected by a link through a pin-and-slot connexion to the frame S. In order to print a total, the numeral wheels are given a complete movement, i.e, through ten units, to bring their pins k against dogs 357 pivoted to the segments, Fig. 23, when the dogs are set in position, so as to communicate the amount set on the wheels to the segments. If a numeral wheel is at the zero position, it is not necessary to set the corresponding segment, and to allow this, the dog 357 is provided with a projection 303, Fig. 23, which engages an arm 356 normally swinging with the dog but movable independently, the pin k preventing the dog being set. The arm 356 has a notch at its upper end adapted to receive a lug on an arm 301 attached to a bail L, which is swung forward when a total key is depressed to lock the numeral wheels together to turn with the frame E, and at the same time set the dogs in the path of the pins k. The total key rocks a lever 305 and thereby an arm 329 is moved to rock an arm 340 on the spindle of which a cam 341, Fig. 21, is mounted adapted to engage the upper arm 345<a> of the bail L, thereby swinging it to lock the wheels. The bail is locked in this position until the printing is effected, and, on the backward movement of the frame E, a lever 349 pivoted to the cam 341 is struck by a pin 350 on the frame, and carries the shoulder f away from the arm 345<a> to return the bail. An ink-ribbon is mounted on inclined spools which are provided with ratchetwheels actuated by pawls 29, adapted to be alternately put into and out of engagement by the manual longitudinal adjustment of a spindle 23 mounted in the swinging frame S. Distinguishing-marks; controlling printing of zeros. - Depression of the totals key sets in position a line-bar Q, Figs. 7 and 23, which marks a line above the total record. The type sectors are normally in the blank position opposite the printing-paper, and to effect printing of the zeros to the right the cam 341 has a link 307 pivoted thereto which is attached at its forward end to a bail 308, carrying a series of overlapping pawls 310 adapted to engage shoulders h on the tail of the corresponding segment, the movement of which causes the pawl to depress the pawls to the right sufficiently to allow the type sectors to turn to the zeroprinting position. Operating by motor; governing speed of operation.-The motor comprises a spring which is wound on the forward stroke of the main handle by means of a pinion engaging a rack on a plate g, Fig. 4, which has a second rack engaging a pinion 151, Fig. 14, on the motor shaft 31; this pinion is provided with a spring- actuated bolt to turn a sleeve 50 in one direction, the sleeve being held from reverse rotation by a spring-mounted wedge 182. The denomination selector is actuated from the motor through a lever K, Fig. 4, pivoted at 51 and connected to the selector frame by a frame Z. The step-by-step motion is controlled by escapement dogs 12, 13 under the control of springs 14 and links 15, 16 which connect the dogs to a bar 63 of a rocking frame H carrying a bar 64 extending below all the keys. During the setting, a T-shaped lever P is secured to the lever by a locking-device G. On the lever P are pins 70 adapted to engage pins 40 on disks 38, 39 mounted on a shaft 41, which is driven intermittently from the motor through a genevastop gear by a pin 37 engaging a radial slot in the disk 39. The frame E is rocked by the engagement of pawls 80, 84, Fig. 12, with a pin 238 on a disk 58, and during this movement the locking-device G is released to allow the lever P to continue its movement. While the pin 238 is passing from engagement with the pawl 80 to the pawl 84, the lever P is returned to engage the lever K. The latch 142 of the locking-device is raised by means of the plate g. The speed of the motor is controlled by a governor J, which is provided with a friction disk 155 bearing on an adjustable forked plate 156. Full - stroke mechanism. - To ensure a full stroke of the handle, the ends of a double pawl 164, Fig. 12, are caused to engage alternately a curved rack 165 on the underside of the plate g. Interlocking; keyboard interlocks.-To prevent operation of the machine while the keys are setting the item, depression of a key moves the end of an arm 63, Fig. 7, in front of a bent lever 62 connected by a link 60 to the plate g to prevent its movement; and, in like manner, when the plate g is moved the bent lever 62 prevents a key being depressed, the lever being held in this position, until the parts complete the movement, by an arm 66 of the lever 62 engaging the edges of the disk 38. When the zeroizing-lever is rocked a pin on the arm 92, Fig. 8, rocks an arm 95 to set a bar 170 into position to prevent movement of the bail 308 connected with the totals key U. Movement of the bail when the totals key is depressed prevents the movement of the bar 170. The zeroizing-lever also locks the numeral keys by means of a slide 174, Fig. 15, connected to the bar 170, which moves over the end of an arm 176 of the frame H so that the frame cannot be rocked. Depression of a numeral key locks the totals key by means of a latch 177, Fig. 7, moved into position when the lever K is actuated. Backward movement of the main handle is prevented, until the calculation has been completed, by means of a latch 317, Fig. 8, engaging a stud on the base and released therefrom by the swing of the lever 62. Multiplying by repetition.-A repeat key Y, Fig. 7, on a key-lever 133 rocks a bell-crank lever 322 to swing the dog 13 to release the lever K. The rear end of the lever rocks another bell-crank lever 324 to move a notched plate 326, Fig. 4, forward to position the frame Z, and moves the latch 327 to free the lever K from the frame Z. The handle may then be operated as long as the key is held depressed.