Patent GB-190401864-A (GB)
Title: Improvements in Typewriting Machines.
Inventor: FELL JOHN CORRY
Filed: 1904-01-25
Granted: 1904-03-31
Abstract: 1864. Fell, J. C., [Union Typewriter Co.]. Jan. 25. Type-writers.-Relates more particularly to the type-bar actions and key mechanism, and the typebar pivots or bearings, of visible-writing machines. The key levers 17 are preferably made of wood and are perforated to receive metal bushes or eyelets 23 by which they are pivoted on a rod 24. The dog-rocker 10 of the escapement mechanism is operated by an arm 13 on a rock-shaft carrying a transverse bar 14 connected by links 15 to a universal bar 16. The levers 17 are guided by comb plates 25, 26. To each key lever 17 is secured by a rivet 29 a yoke 28, in the upper end of which is a cross-pin engaging a slot 31 in a lever 32. The levers 32 are parallel and are pivoted at 33 on a cross-bar 34. Their front ends are forked and provided with cross-pins engaging slots 39 in the horizontal arms 40 of bell-crank levers 40, 44 pivoted on a cross-bar 43. The upper arms 44 are connected by rods 45, adjustable at 46, to the ears 48 of the type-bars 49, which latter are pivoted on hangers 55 attached to a segmental bar 57. The arms 40 are shorter in the middle of the machine and are gradually longer from the middle to the sides, their ends being arranged in a segment or curve. The lengths of the levers vary correspondingly, being longest at the middle of the machine and shortest at the sides. The object of this arrangement is to obtain an even touch or resistance of the key levers 17. The hangers 55 are slotted to embrace the bar 57 and are attached to it by screws engaging the holes 59, 60. Two type-bars are pivoted on each hanger, one on each side of the web 65 which is of tapering form so that all the type-bars are pivoted and swing in radial planes. The web 65 is formed on each side with a projecting ring or bearing 66 for the balls or rollers 54, and the eyes of the type-bars are provided with grooved rings 53 which engage the rollers or balls. The balls are confined by engagement with the inclined edges of discs 68, secured by means of central threaded projections 67 of the web 65. In the discs 68 are screws 70 for locking the discs in position. A flange on the edge of each disc 68 engages a circular groove in the hanger web 65, to prevent dust &c. from entering the bearing. The segmental bar 57 is attached to a vertically-movable bar 73 having at its ends depending arms 74. This bar is hung on the frame by pairs of pivoted links 75, 76, the latter being extended rearwardly at 78 and connected by rods 79 to the shift-key mechanism. Secured to the rear of the segment 57 is an arm 80 to which is attached an arm 81 secured to a segmental pad 83 for supporting the free ends of the type-bars. The ends of the pad 83 are secured to arms 84 fixed to the segment 57. A slotted flange 86 on the segment 57 serves to guide the type-bars as they strike the platen 4. The key levers and type-bars &c. are returned to normal position by springs 87 connecting each lever 32 with the corresponding key lever 17. The spring 87 is connected with the lever 17 by means of an adjustable staple-shaped piece 88 the long leg of which passes through a hole in the lever and is provided with a nut 89, while the short leg engages a hole 90 in the lever.