Patent GB-190123930-A (GB)
Title: Improvements in Typewriting Machines.
Inventor: FELL JOHN CRRY
Filed: 1901-11-25
Granted: 1902-03-27
Abstract: 23,930. Fell, J. C., [Wyckoff, Seamans, & Benedict]. Nov. 25. Type - writers.- Relates to the " actions " of fronts t r i k e machines, and consists in so mounting the typebars that they can all be provided with wide bearings, so as to preserve accurate alignment after prolonged use. The type-bars are carried by a segmental frame 5 secured at the top to lugs 6 rising from the top plate 3, and at its lower central portion to a bracket 8 extending from the transverse bar 10 of the frame. Secured upon the rear vertical face of the segment towards its lower or outer edge are two sets of radial type-bar hangers 14, 15, shown most clearly in the rear elevation of the segment, Fig. 6. The hangers are secured by screws 11, the heads of which are received by counter-bored holes 12 in the segment. The hangers 14 lie closely against the rear face of the segment, and are partly overlapped by the hangers 15, which are in rear of, and slightly below or outward from, the hangers 14. The hangers are forked to form wide bearings for the type-bars, and the bearings are made of increasing width towards the ends or sides of the segment, where the type-bars approach the horizontal position when printing. The type-bars journalled in the hangers 14, 15 are designated as 16 and 17 respectively. Each carries a double type 18, the platen 4 being shifted vertically for writing upper-case characters. The type - bars extend through slots 19, and are formed with sharp bends or elbows 16<a>, 17<a>. The hangers near the highest part of the segment are mounted on a step or face set forward slightly so that the hangers may clear the platen &c. In addition to the type-bars 16, 17, a series of short typebars 21 is provided, smaller in number than the others, and journalled in hangers 22 secured near the upper curved edge of the segment. The type-bars 21 are normally almost in contact with the front face of the segment, and swing through nearly 180‹ to the printing-point. The upper side portions of the segment are stepped at 22a 22b, and 22<c>, so that the hangers 22 may clear the platen &c. The type-bars are operated by key levers 24 fulcrumed at 26 and tensioned upwards by springs 27. The straps 28 are connected to the rods 30 by means of universal joints comprising double or crossed pivots. The rods 30 are connected with the long type-bars 16, 17 through bell-crank levers 31 and rods 33. The short type-bars 21 are connected by links 37 to pivoted levers 36. In the case of the central type-bar, shown in Fig. 1, the lever 36 is pivoted directly to the actuating-rod 30. In the case of the other type-bars intermediate bell-crank levers 32 and links 35 are employed. In their normal or inactive position each of the long type-bars rests on the felt or leather tip of a plunger 46<a>. The plungers are seated in holes bored radially in a segment 48. A band 52 holds a leather strip 52<b> against the open ends of the holes, and light compression springs are interposed between the plungers and the leather strip. The plungers damp the motion of the returning typebars by a succession of rebounds, due to the small inertia of the plungers and the weakness of the compression springs. The short type-bars rest against similar plungers adapted to move horizontally. A universal bar 59 beneath the keyboard serves to actuate the escapement dog rocker 61 and allow the feed of the carriage rack 67 in the usual way. An apron or shield comprising a horizontal and a vertical portion is arranged over the type-bars, the horizontal portion being cut away to afford a passage for them. The shield is secured by bolts and wing nuts, so as to be easily removable.