Patent GB-349504-A (GB)
Abstract: 349,504. Typewriters &c. BRITISH TABULATING MACHINE CO., Ltd., Victoria House, Vernon Place, Southampton Row, London.-(Assignees of Carroll, F. M. ; 1080, Warburton Avenue, Yonkers, New York, U.S.A.) Feb. 25, 1930, No. 6277. Convention date, April 25, 1929. [Class 100 (iv).] Relay type-wheel actions; hammer-impression arrangements; paper - carriages. - A calculating machine for selectively entering items into one or more totalizers comprises a set of primary totalizers, a set of secondary totalizers, a single control means fcr the actuators, a selecting device for the primary totalizers, and means selectively associating any one or more of the secondary totalizers with one or more of the primary totalizers for the duration o' a series of operations. During entry, each item is listed on an item strip with the identification number of the totalizer. Total printing is initiated by manipulation of a total lever and depression cf the motor starting bar. The totals from each horizontal row of totalizers are impressed on a total strip as the total printing carriage is moved upwardly over the rows of totalizers, the totalizers being zeroized automatically after each impression. A constantly running motor drives a pair of shafts which can be coupled to a listing shaft and total shaft through one revolution clutches. The shafts 352, Fig. 15, of the differential mechanism are connected to type sectors 343 each of which has a notch engaging a rod 345 the sector being pressed against the rod by a spring-controlled bell crank 346 and link 348 bifurcated to engage a pin on the sector. The selected type are forced against a platen 350 by impression hammers 351 engaging aligning notches 352 in the sectors. The hammers are operated by springs 353 but are normally held inoperative by latches 354 pivoted on arms on a shaft 356 the shaft being rocked to tension the springs by a linkage and bell crank 359, Fig. 14, co-operating with a cam 361 on the main shaft 94. Each hammer is associated with a pivoted trip latch 365 having a hooked end for co-operation with the latch 354 and provided with a pin 372 projecting into an L-shaped slot 369 in a member 373 pivoted to a lever 374 with a cam shaped end engaging a surface on the type sector. Movement of a type sector from its zero position rocks the lever 374 and lowers the member 373 to position the hooked end of the trip latch into the path of the latch 354 so that on the return movement of the shaft 356 the latch is disengaged and the hammer freed to force the type against the platen. The latches 354 are guided between the prongs of a comb plate 395 excepting at the positions representing the cents denominations and the totalizer numbers where the comb plate has extensions for tripping the hammer latches 354 at each operation. Zeros to the right of significant figures are printed by providing the members 373 with lateral projections 398 extending over a projection 399 on the adjacent trip latch 365. When a trip latch is lowered the adjacent member 373 is rocked to bring the vertical position of the L-shaped slot under the pin 372 so as to lower the adjacent latch. The sectors for printing the totalizer numbers are electrically controlled by magnets 405, 406, 407, Figs. 14 and 15. Each magnet has a core to which is pivoted a spring-controlled lever 414 adapted on energization of the magnet to move into the path of a projection 416 on a type sector 417. The sector 417 is notched to engage the shaft 345 and has attached to it one end of a spring 423 the other end of which is connected to a bell crank 421 loose on the shaft 345. An arm of the bell crank 421 is operatively connected to an arm 425 on a shaft 385 rocked by means of a cam on the shaft 94. At the end of the printing cycle shafts 381, 391 are rocked by a three-armed lever 384 associated with a cam 387 on the shaft 94 to operate balls 380/390 to restore the hammers and latches. The movement of the locking bar 279, Fig. 9, of the totalizer selector keys 51, 52, rocks a bell crank 285 to operate a linkage 286, 288, 288<1>, which closes contacts 289, 290, to establish connection with the motor circuit through the starting bar 57 and magnet 68 as shown in Fig. 43. When the machine starts the start bar is shunted and the circuit is then completed through the cam contacts L1 and wires 246, 247, the depressed selector keys, and totalizer magnets 175. The selector keys control contacts 230, 231 and cooperate with normally closed contacts 235, 236 and normally open contacts 237 operated with the contacts 289, 290 on depression of selector keys. The totalizer magnets 175 are arranged in four columns and are controlled through contacts 243, 244 in a grid wire system by electromagnets 238, 239 connected as shown through the contacts 235, 236, 237 and printing magnets 405, 406, 407. The magnet 175G for the grand totalizer is connected directly to the vertical grid wire 253 and to cam controlled contacts L2 and contacts 605 opened during total printing. The magnets 175S of the secondary totalizers A .. K are arranged in circuit with contacts 607 closed during adding operations and with plug sockets 623. These sockets are connected in a predetermined manner to sockets 631 in circuit with contacts 625 normally open but adapted to be closed when the corresponding primary magnet 175 is energized. The total-taking operation is initiated by shifting the total lever 61a and depressing the starting bar 57 thereby closing contacts 620, Fig. 43, shunting selector key contacts 289,290, and operating control magnet 68 to permit operation of listing shaft 72 and total shaft 74. The total shaft 74, Figs. 38 and 39, is associated with a clutch 479 and reversing gearing 475, 476, 488, 508, 510, 511, for driving the shaft 95 in one or other direction. The direction of movement is controlled by a lever 483 connected to a lever 485 provided with cam surfaces 486, 487, co-operating with bell cranks 505, 501, 513. A screwed portion of the shaft 95 carries a non-rotatable block 492 with projections 493, 494, coacting with a pin 502 on the lever 485 and a projection 495 controlling compression springs 497, 512. The projections encountering the pin 502 move the lever 485 to one side or the other over the high points of the cam surfaces on the bell cranks and thereafter the springs snap the lever 485 and clutch 479 into one or other operative position. The shaft 95 is connected by bevel wheels 472, Fig. 2, to two vertically arranged screwed spindles 471 on which the total printing carriage 470 is mounted. As the carriage passes each line of totalizers the printing mechanism is operated to print the total and the row of totalizers automatically reset to zero. The carriage, Figs. 32 and 32a, comprises side-plates 530, 531 connected by tie rods and with tapped enlargements for the screwed shafts 471. Arms 536, 537 pivoted to the side members form the swinging support for a cradle 545 carrying the printing mechanism. A spiral gear 540 on one of the shafts 471 is utilized to drive a shaft 542 operating the hammer mechanism, paper feed, and ink-ribbon mechanism. The printing hammers 564, Figs. 34 and 36, are pivoted on a shaft 565 supported in notched supports 566 and held thereon by manipulative latches 567. The paper roll 548 is supported on the cradle by links 551 and the paper is led over guide rolls 554, 555 and through feed rollers 556, 557, journalled in side-plates and spring- controlled arms respectively. A continuous ink ribbon 568 is guided around rods 571 and a tension roller 572. The cradle tends to swing so as to bring the ink-ribbon into contact with the type wheels 450 but contact is prevented by a projection 575, Fig. 31, on the frame engaging a cam disc 576 on the shaft 542, the said projection being adapted to enter a notch in the cam when the carriage reaches a position opposite a line of totalizers to swing the cradle into printing position. At the same time the hammers are operated to effect an impression. The hammers are withdrawn by the engagement of a plate 578 fixed to a spring- controlled shaft 581 with notches in the hammers, the shaft 581 being operated by a lever 586 cooperating with a cam 585 driven by a pawl engaging a notched disc 583 on the shaft 542. When the lever drops off the cam the hammers are actuated. After taking an impression a cam 588 integral with the cam 585 operates a lever 592 carrying a pawl 593 to actuate a ratchet wheel 587 on the feed roller 556 and advance the paper sheet. The feeding of the ink-ribbon is effected through bevel gears 595, 596, Fig. 32a, and a gear train operating feed rollers. Line-spacing mechanism.-The platen carries a ratchet wheel 435, Fig. 14, actuated by a pawl 436 on a member 437 pivoted to a link 438 connected to the three-armed cam-operated lever 384. To the opposite end of the platen is secured a bevel pinion geared to a continuous ink-ribbon feed roller.