Patent GB-219523-A (GB)
Title: An improved type-writing machine
IPC: B41J3/36
Filed: 1923-09-01
Abstract: 219,523. Dietrich, K. Sept. 1, 1923. Index type-case machines.-Printing-types 8, Figs. 2 and 3, are mounted in a case or frame A which can be moved longitudinally, by means of a knob, to place the selected type under an impression-key lever 16 mounted on a slide 12 which receives letter-spacing feed; the paper is placed on a base 35, and an ink-ribbon 34 is arranged between the types and the paper. The frame A consists of plates 3, 4 connected by bolts 5, the types passing through holes in the plates, and being raised by means of springs 10 engaging the bent ends of fingers 9 on the types. The frame is supported and guided by angle bars 2 having guide-ledges 6. The angle bars are pivoted to lugs 36 on the base, and can be raised to render the paper accessible. The slide 12 is guided laterally by the front ledge 6, and a rack 7 secured to the rear ledge 6. The slide is provided with a pointer 45 arranged over a characterscale on the plate 3. The impression-key lever 16 is pivoted on a, pin 15, carried by ears 14 on the slide 12, and is formed with a projection 16<a> for depressing the selected type. The angle bars 2 are provided with inclines adapted, by engaging the fingers 9, to raise the types if the springs 10 fail. Aligning for impression. - On depressing the impression-key-lever 16, Figs. 2 and 3, a tooth 21 thereon aligns the selected type by engaging teeth in the front of the track 7 and the rear edge of the plate 3. Case-shift mechanism. - The types may be arranged in two rows on a case or frame 3, Fig. 8, mounted to shift laterally on a longitudinally adjustable support 48, carrying a shift-key lever 54 connected by linkage 55, 56 to the case 3. Letter-spacing mechanism; carriage-releasing arrangements.-The slide 12, Figs. 2 and 3, is urged to the right by means of springs 24, connected to cords 22 passing over rollers 23, and is controlled for letter-spacing by means of escapement mechanism operated by the impression key-lever 16 or a spacing key-lever 17, both key-Levers being pivoted on the pin 15 on the slide. The escapement mechanism comprises a rocking dog 28 on a lever 25 which is pivoted to a bracket 13a on the slide, and is connected to a rod 29 bearing a pin 31 arranged in the path of the key-levers. The dog, when released, is moved to the left by a spring 27, the movement being limited by a pin and slot. On depressing either of the key-levers, the dog is released and the slide is locked by engagement with the rack 7 of a tooth 21 on the key-lever 16, or teeth 32 on the key-lever 17. On releasing the depressed key-lever, the teeth 21 or 32 are released and the dog re-engages the rack, and permits a one-tooth movement of the slide. When it is required to run the slide towards the right, the dog is released by depressing a button 32 on the rod 29. The slide can be run towards the left without releasing the dog. Paper-supports; sheet-feeding arrangements; feed-roller detents.-The paper is placed on the base 35, Figs. 2 and 3, which is provided with an impression surface 47 of leather or rubber. The paper is fed for line-spacing by means of feed-rollers 38 and co-operating rings 39 on a roller 40, which is supported on springs 41 and revoluble by means of a knob 44, the line-spacing movement being determined by engagement of spring fingers 42 with depressions in the roller. Ink-ribbon mechanism.-A length of ink ribbon 34, Fig. 3, is provided at the ends with hooks 34<a> attached to cross-pieces 1 on the angle bars 2.