Patent GB-150826-A (GB)
Title: Improvements in typewriting machines
IPC: B41J7/02
Filed: 1919-06-10
Abstract: 150,826. James, R. W., (Remington Type writer Co.). June 10, 1919. Type-lever actions.-The type-levers 8 are operated directly by bell-cranks a, having long arms 68 which are normally parallel to the type-levers, and short radially-disposed arms 69 which are connected by fore-and-aft links 72 to the upstanding arms 73 of bell-cranks b, operated directly by the key-levers 86, 87, the arms 73 being of progressively increasing length from the middle to the sides of the system. In the action shown, the type-levers are formed with slots 66, Fig. 1, for engaging pins 71 on the arms 68 of the bellcranks a, the slots being arranged in front of the arcuate pivot-wire 12 on the segment 11 and being inclined forwards. The arcuate, pivot-wire 70a of the bell-cranks a is disposed in radial guideslots 70 in the segmental rest 14 which is connected by rods 15 to the segment 11. The keylevers move in parallel planes and are formed with slots 85 for engaging pins 84 on the horizontal arms 74 of the bell-cranks b, which are pivoted at the rear on a wire 75 and move in parallel planes. The key-levers are caused to impart uniform movements to the upper ends of the arms 73 by arranging the pins 84 at graded distances from the pivot-wire 75. The key-levers and the bellcranks b are supported by a detachable frame consisting of side bars 78 and back and front bars 76, 77, formed with lugs 79, 80 which are attached by screws 81. 82 to lugs on the framework 1. The back bar 76 supports the pivot-wire 75 and is formed with guide-slots 83. The front bar 77 is formed with guide-slots 90 for the key-levers and supports two pivot-wires 89, 91, the two lower banks of key-levers 87 being pivoted on the wire 91 and the two upper banks of key-levers 86 being pivoted on the wire 89 and being cranked to clear the wire 91. Returning-springs 92 for the bellcranks a are connected to lugs 93 on plates 94, secured to a flanged plate 95. Adjusting-screws 96, threaded through the plates, are formed with shouldered ends 97 which enter holes in the rest 14. When the segment 11 is shifted for change of case, the bell-cranks a and the type-levers move bodily, and the links 72 pivot upon the arms 73. Case-shift mechanism; shift-key actions.-The type-lever segment 11 is supported at the top by two rocking arms 19 and is connected by adjustable pillars 27 to a cross-bar 28 which is supported by arms 20 on a rock shaft 26 operated by shiftkey levers 58. The shift-key levers consist of bellcranks, connected to links 54 having pin-and-slot connexions 53 with the arms 48 of a ball 47 on the rock-shaft. To equalize the movement of the arms 20, the arms 48 of the bail are mounted loosely on the rock shaft, and the cross bar is connected to the rock shaft at the middle by a rod 50. The shift-key levers are normally held in contact with stops 64 by springs 62. The arms 19 rock on pivots 23 on the framework 1 and are pivotally connected to shouldered screws 21, mounted in lateral brackets 16 on the segment. Lateral movement of the segment is prevented by the engagement of the rounded ends 21<a>, Fig. 2, of the screws 21 with the heads 22 of screws, mounted in the framework 1. The pillars 27 are provided at the bottom with heads 30 and nuts 32 for securing the cross bar 28 and are formed with screwed tops 27a which enter the brackets 16 and carry lock nuts 29. The shift movements of the segment are limited by the engagement of upper and lower stationary stops 38, 40 with pads 36, of fibre or the like, at the ends of the cross bar 28. The stops 38 consist of stationary lugs. The stops 40 are adjustable. each being supported on a stationary lug 39 by means of three adjusting- screws, the two outer screws 41 passing loosely through the lug and screwing into the stop, and the middle screw 42 screwing into the lug and abutting on the stop. The segment is held in the upper or normal position by means of a spring 43 on the rock-shaft 26.