Patent GB-125499-A (GB)
Title: Improvements in Portable Typewriters.
IPC: B41J3/37
Filed: 1918-04-15
Abstract: 125,499. Marks, E. C. R., (Corona Typewriter Co.). April 15, 1918. Folding type-lever machines.-The type-levers are mounted on the main framework and the key-levers are movable from an operative position outside the framework to an inoperative position within the framework. In the machine shown, the keyboard 12 can be moved in the manner of a drawer into the framework 11, and a means is provided for moving the platen carriage 50 inwards from the overhanging position shown. The keyboard is carried by a rectangular frame 16, secured at each side to a slide 20, mounted in a slide 19 which is mounted in a guide 22 on the framework 11, pins and slots being provided to limit the movements. The character-key levers 30, 31, 32 are pivoted on cross rods 27, 28, 29 in the frame 16, the rear arms of the key-levers having lugs 36 which normally engage the arms 37 of levers 38, pivoted on a cross-rod 39 in the frame 11 and connected by links 48 to the typelevers 43. Returning-springs 39<a>, 41 are connected to the key-levers and the levers 38 respectively. The frame 16 is supported at the front by pivoted legs 42<a> and is provided with a latch for holding the frame in the extended position. The latch may consist of a key-lever 71 which is pivoted at 70 and formed with a notch 72 for engaging the wall 14 of the framework 11. The framework may be provided with a hinged cover. The bed 51 of the carriage 50 is secured to slides 52, Fig. 2, which are mounted in guides 53 on the framework 11, and are connected by links 54 to levers 55 having arms 57 in the path of the frame 16. Pins, engaging slots, are provided for limiting the movements. When the frame 16 is pushed into the framework 11, the key-levers separate from the arms 37 of the action-levers, and the levers 55 draw the platen-carriage inwards from the overhanging position shown. The carriage may be returned by springs 58; or means may be provided for returning the carriage positively. Specifications 103,508 and 103,509 are referred to. Letter-spacing mechanism; space-kep actions.- The universal bar 63, Fig. 2, is suspended from bell-cranks 64 which are pivoted on brackets 64<a>, Fig. 8, on the framework 11 and engage levers 65 which are pivoted to brackets 65<a> on the slides 52. The levers 65 are connected by a rod 66 which engages slots in a rocking frame 67, carried by a rod 68. The frame 67 operates escapement and ribbon-feeding mechanisms of usual construction. The space-bar 59 is secured to levers 60, pivoted on the rod 29 and formed with arms engaging the arms of forked levers 61 which are pivoted on the rod 39 and are formed with slotted ends engaging the universal bar. When the frame 16 and the slides 52 move inwards, the space-bar levers separate from the belt-cranks 64, stops preventing the bell-cranks from dropping. Carriage-shift mechanism; shift-key actions.- The guides 53 that support the carriage 50 are secured to posts 74 which are connected by the rod 68 and are guided by the brackets 64<a>. The rod 68 is carried at each end by a pair of arms 75, 76 which are .secured to a shaft 77, mounted in the framework 11, and to a loose sleeve 77<a> respectively. Shift-key levers 86, 87, Fig. 1, mounted on the rod 29 in the keyboard frame 16, are formed with arms 84, 85 which engage arms 78, 79 on the shaft 77 and the sleeve 77<a> respectively. The arms separate when the frame 16 is pushed into the framework 11. The shift-key levers impart different shift-movements, which are determined by the engagement of stops 81, 80 on the arms 76, 75 with stops 82, 83 respectively. The stops 82, 83 consist of screws, mounted in the guides 22 Shift-key locks.-Either or both of the shift-key levers 86, 87, Fig. 1, can be locked by a lever 92. which is formed with a lug for engaging hooks on the shift-key levers.