Patent GB-220280-A (GB)
Abstract: 220,280. Kleinschmidt Electric Co., Inc., (Assignees of Kleinschmidt, E. E.). Aug. 11, 1923, [Convention date]. Electric type-lever machines. - A type - printing telegraph comprises down-strike type-levers printing on a tape which is fed from right to left over a platen at the front of the framework, the type-levers being connected to actuating-bars selected by notched members controlled bv received combinations of electric impulses. The framework of the type-lever selecting and actuating mechanism may be supported on a transmitting-keyboard, the platen being arranged above and at the back of the keyboard so that the matter typed on the tape is visible from the front of the machine. The type-lever selecting and actuating mechanism may be so arranged that the framework can be overturned and embodied in a page printer, the type-levers then having up - strike impression. In the apparatus shown in Fig. 1, the typelevers 116 are, as described in Specification 218,643, connected to actuating- bars 108 selected bv notched bars 59 - - 63 and operated by a universal bail 125, the notched bars being as described in Specification 235,572 controlled by pivoted fingers 37 - - 41 actuated bv pins 54 - - 58 on a shaft 15 movable axially by the receiving- magnet. The base 1 of the selecting-mechanism is now mounted at the top of the framework 400, and the cam-shaft and the clutch-controlling spindle 79 are mounted at the side, the framework having supporting-surfaces 403 which are employed when the apparatus is, as shown, embodied in a tape-printer, and supporting-surfaces 404 which are employed when the apparatus is turned on its back and employed as a page-printer. Fig. 8 shows the apparatus as supported by a transmitting-keyboard 487. The above-described selecting and actuating mechanism may be replaced by that described in Specification 235,577, the base of the pageprinter being provided with projections enabling the framework to be supported on its back without interfering with the printer-solenoid, contactcontrolling arms, or other parts. The mechanism described in Specification 235,577 may be modified for cam-actuation in the following manner :- The printing-solenoid is eliminated and the selector-bar restoring and locking devices, excepting the pawl and ratchet-wheel and magnetoperated bar 705, Fig. 21, are replaced by the bell-crank 76, 77 mounted on the clutch-controlling spindle 79 of the mechanism described in Specification 218,643, the bar 705 being now connected to a shaft 717 provided with a latch 716 for the bell-crank. Paper-supports; web feeding and guiding arrangements; paper-shields.-A platen disc 405, Fig. 1, supporting the tape at the printing point is secured by means of a threaded knob 409 and a pin 407 entering a slot 408, to a shaft 406 revoluble in a sleeve 420. A member 415, Fig. 3, on the sleeve supports spring-urged arms 413 carrying a feed-roller 412 which rests on the platen disc and is provided with a pinion 411 engaging a pinion 410 on the knob. The member 415 is provided with guides 418, Fig. 3, for the tape, and the arms 413 carry a guide for exposing the tape to view after leaving the platen disc. The tape is taken from a reel 478, Fig. 8, and passes in a loop round guide-rollers 481, 492, 483, and thence to the guides 418. The guide-roller 481 is carried by a spring 480 which yields when the feed-mechanism is actuated, and returns to turn the tape-reel when the feed-movement has finished. The tape-reel is mounted in an extension 477 of the casing 476 and is retained by a detachable cover 479. The platen disc mav be replaced by the shiftable platen block described in Specification 235,576; the platen block may be provided with shields for the tape. Letter-spacing mechanism.-A ratchet-wheel 451, Figs. 1 and 5, coupled to the shaft 406 of the platen disc 405 by means of a pin 457 and fork 456, engages a pawl 463 on a rocking arm 458 having pin-and-slot engagement 465 with a link 466 connected to an arm 467 on the printing- bail shaft 129. The arm 458 engages also a rocking arm 468 connected by a spring and a slotted link to the rocking arms 166 supporting the universal bail 167 operated by the type-levers. During the printing stroke of the printing-bail 125, the link 466 descends idly and when the type-levers engage the universal bail 167, the arm 468 rocks the arm 458 and the pawl is retracted. On return of the bail 125, the link 466 rocks the arm 458 and the pawl effects letterspacing. If a type-lever sticks at the printing point, the spring connecting the arms 468, 166 yields until the lost motion in the slotted connecting-link is taken up, and the type-lever is then returned. When the above-mentioned shiftable platen block is employed, the spacing- mechanism is placed at the left of the platen block. Platen-shift mechanism.-The platen disc 405, Figs. 1 and 3, is movable axially for platen shift, by means of mechanism engaging the sleeve 420, the sleeve being movable axially and being connected to the platen-disc shaft 406 by means of an arm 422 and a grooved collar 425. The sleeve is mounted at the front in a bracket 423, and at the rear is secured to a carriage 427 mounted by means of balls 429 on the arms 428 of a support 430. The carriage is provided with rollers 431, 432 co-operating with extensions 433, 433<1> of actuating-bars controlled by shift and unshift signals respectively. Springs hold the extensions in contact with guide-rollers 436, 436<1>. The carriage is retained in normal or shift position by a spring catch 439 co-operating with notches 440, 441. Adjustable stop-screws 442, 443 engage the member 415 on the sleeve 420 to limit the shift movements. Case-shift mechanism.-The case-shift mechanism described in the above-mentioned Specification 235,576 may be employed instead of the above-described platen-shift mechanism. Ink.roller mechanism.-The vibrator 324, Fig. 1, is operated by a lever 319 having a pin 320 engaging a slot in a member 322 carried by the universal bail 167, the pivot 318 of the lever being movable with the shift mechanism to adjust the vibrator for platen shift. When the abovementioned shiftable platen block is employed, the pivot 318 is carried by the lever that shifts the platen block.