Patent GB-190433-A (GB)
Abstract: 190,433. Shipley, B. M. Dec. 16, 1921, [Convention date]. Hammer-impression arrangements. -Multiple-printing impression mechanism for cash registers and the like for printing on record material such as an inserted slip includes (1) platenoperating mechanism, (2) means for disabling one platen during part of the printing operation, (3) means for disabling both platens when there is no slip in the machine, and (4) means for returning the various parts to normal positions before the slip is fed, so as to prevent tearing the slip. The invention is shown as applied to the type of machine described in Specifications 8119/15. [Class 106 (i), Calculating &c.], 100,568, 100,569, and 100,570, [both in Class 106 (i), Calculating &c.], and cooperates with the. slip-feeding mechanism described in Specification 195,072 and the recordmaterial severing and filing mechanism des cribed in Specification 195,073, [Class 106 (i), calculating &c.]. (1) The inserted slip is placed on the table 460 and printed on by type-wheels 262 and a plate 500, co-operating with platens 466 carried by two pairs of arms 462, 463 loose on a shaft 448, each pair being made integral by yokes 464, 465 respectively. The printing. mechanism is operated from the shaft 173 which is rotated from the main drive shaft once at each operation of the machine. Fast on the shaft 448 is a double-armed lever 467 having attached to one arm, springs 473, 474 which are also attached to stops 470, 471 on the arms 462, 463 respectively so that these stops 470, 471 are pulled against parts 468, 469 on the arm 467. Also keyed to the sha.ft 448 is an arm 478 carrying a roller 479 operated bv a cam 480 rotated clockwise, as shown in Fig. 4. once at each operation of the machine. This cam has two high portions 486, 487 and is cut away on the line 488 to receive the point 489 of the arm 478. Rigid with the lever 467 is an arm 476 having connected thereto a strong spring 477 anchored at its other end to the machine frame; in the normal position shown this arm 476 abuts against a stop 490. Upon rotation, the portion 487 raises the arm 478 and thus rotates the arms 467, 476 counterclockwise so that the springs 473, 474 draw down the platens 466. Owing to the strong spring 477 the end 489 immediately on passing the highest part of the portion 487 moves rapidly down a radial portion 487<1> of the cam. This rotates the arms 478, 467, 476 clockwise rapidly, so that by means of the studs 470, 471 the platens are flung up to make the impression. Just before these platens engage the type the arm 476 engages the stop 490, the platens moving the last portion by momentum. (2) The word " Paid " needs only to be printed by the plate 500 at the second impression, and to prevent this word being printed at the first impression, a, portion 502 of a bar 503 pivoted at 504 to the slip-feeding pitman 505 is moved into the path of a part 501 of the platen-carrying frame on the arm 462 bv means of a cam on the plate 309 so that the arm 462 is not lowered as in Fig. 4, the cam on the plate 309 removing the part 502 before the second impression. (3) When there is no slip in the machine both platens 466 are prevented from being lowered. Loose on the shaft 461 is an arm 550 forked to surround a stud 551 on a pitman 552 operated by a cam 554 and pivoted to a. lever 556 which is loose on a shaft 303 and has an upwardly extending portion 559. Upon rotation of the cam 554, a spring 555 tends to move the pitman 552, to the right as shown in Fig. 1, and if there is no slip in the machine a part 560 of the arm 550 which part is normally retained by the slip, is able to rise beyond the table 460 and allow this movement of the pitman 552 so that the lever 556 is rotated counterclockwise and the part 559 is moved into the path of parts 561, 562 of the platen-carrying frames, so that the platens are not lowered and are therefore not operated by the spring 477. (4) As the cam 554 completes its rotation, the high part on it engages the roller 553 and moves the pitman 552 to the left so that the part 560 is lowered. If there is a slip in the machine, however, it has been meanwhile fed forward so that part 560 would tend to tear the slip, and in order to prevent this, means are provided for returning the above parts to normal position before the slip is fed. Loose on the shaft 303 and rigid with the arm 559 is a member 565 carrying, by pin and slot connections, a plate 567 which has a stud 570 co-operating with a pawl 571 pivoted on a lever 572 in turn pivoted to the machine frame. This lever 572 is also pivoted to a link 574 pivoted to an arm 573, keyed to the shaft 303 which is rocked first clockwise and then counterclockwise by a cam on the. plate 309, pitman 305 and arm 304, Fig. 3. The clockwise movement of the shaft 303 rocks the lever 572 counterclockwise so that the pawl 571 contacts with the stud 570 and rotates plates 567, 565 and therefore arm 559 clockwise to normal position; this moves the part 560 downwardly. These parts are held in this position by the cam on the plate 309 shown in Fig. 3, until near the end of the operation. As the reverse motion of pitman 305 and shaft 303 takes place, however. the high part of cam 554 returns to the position shown in Fig. 1 and still holds the part 560 down and away from the slip. If there is no slip in the machine and the arm 559 is in the path of parts 561, 562, then the plate 567 has been moved with the arm 559 to a position where the pawl 571 moves past the pin 570 without touching it, and near the end of the operation of the machine the pawl 571 is returned to its normal position before the pitman 552 and arm 556, wiping past the pin 570 by means of its spring 576.