Patent GB-189803101-A (GB)
Title: Improvements in Type-writing Machines.
Inventor: FELL JOHN-CORRY
Filed: 1898-02-07
Granted: 1898-06-04
Abstract: 3101. Fell, J. C., [American Writing Machine Co.]. Feb. 7. Type-writers.-Fig. 3 shows a vertical longitudinal section through the centre of the machine. The key levers 3 are pivoted on a shaft 2, and are connected by rods 7 to depressible bars 9 the opposite ends of which are carried by sets of arms 11, 14 pivoted on rods 12, 15. The bars 9 are each connected by a rod 19, adjustable by a screwed sleeve 18, to a type-bar 4. Springs 23 return the bars 9 and key levers &c. to normal position. The type-bars are pivoted in brackets 21, two of which are secured one above the other by a screw 32. Washers 33, 34 of segmental form, placed above and between the U-shaped brackets 21, preferably extend over three pairs of brackets, so that any bracket may be adjusted without disturbing the rest. The pivot 20 of the upper type-bar is preferably set behind the pivot in the bracket below; and to throw the lower ends of the type-bars apart when at rest, the pivots are set at an inclination to the horizontal. The bars 9 all act upon and depress a roller 38 in arms 40 of a shaft 42. The shaft 42 has an arm 45 having a pin 49 engaging a slot 48 in the part 47 of a rod which operates the escapement. The parts 52, 54 of the rod are connected by an adjusting- sleeve 53, and the upper part 55 of the rod consists of a plate on which the spring dog of the escapement is pivoted. The detaining-dog is pivoted to a plate on the frame, and is formed with a horizontal arm pivoted to the plate 55. The escape-wheel 69 is on a shaft 70 on the other end of which is a pinion engaging the rack 80 on the carriage 81. The escape-wheel 69 is arranged, by a ratchet connection 73, to rotate with its shaft 70 in one direction only, so that, as the carriage is returned, the shaft 70 rotates while the wheel 69 remains at rest. The carriage is drawn along by a spring drum 84. On the lower end of the rod 47 is a flanged nut 51 engaged by a flanged bar 100 on levers 98 pivoted at 99. The levers 98 are engaged by the ends 96 of levers 93 pivoted at 94 and connected at their outer ends by a space bar 95. The carriage bar 81 runs on ball and roller bearings between guide-bars 85, 86, the roller and balls being kept in place by a frame 169. The bearings 74 of the escapement shaft 70 are in a bracket pivoted to the framing, which may be depressed to disengage the pinion from the rack 80. The bracket is connected to a pivoted arm having a roller engaging a depressible release bar carried by two arms pivoted to the carriage bar 81. This bar may be depressed by a finger-piece at one end, and may also be depressed by a release key or lever at one end of the platen frame. Attached by studs &c. 135 to the carriage bar 81 is a margin &c. stop bar 123 notched or toothed on its upper edge. A margin stop 126 and a carriage stop of similar construction are mounted to slide on the bar 123, and are each provided with a pivoted lever or catch engaging the teeth in the bar. The margin stop, when the carriage is returned, engages a stop on the arm operated by the release bar, so that the carriage may be moved further for printing in the margin by operating the release bar which depresses the stop. The carriage stop operates an alarm, and then engages the front end of a pivoted lever 143 on a vertical pivot. The rear end of the lever 143 engages a lever 147 connected to levers &c. which operate a pivoted plate 154 and move the upper edge of the latter under the bars 9 so as to lock the printing &c. mechanisms. The bracket on which the lever 143 is pivoted is on a horizontal pivot, so that the front end of the lever may be depressed to permit of the carriage moving further for printing additional letters at the end of the line. The lever 143 is so depressed by a lever pivoted under the top plate. The rear bar 174 of the platen frame or carrier is hinged in open or hook bearings 175 on the bar 81. Flanged collars are provided which may be turned to lock the bar 174 in the bearings or to release it for detachment. Centrally of the front bar of the platen frame is a roller 181 running upon a rail adjustable vertically upon a fixed rail 185 by inclined slots and screws &c. The platen 191 is formed of a tubular wood core and a covering of rubber, the wood core being fixed at one end to the shaft 192. At the other end the platen runs upon the flange of the line space ratchet-wheel, which is normally connected to the shaft 192 by a conical friction clutch. This clutch may be disengaged by means of a lever so that the platen can be rotated to any extent, by knobs on the ends of its shaft 192, independently of the line space mechanism. On the back rod 174 of the platen frame are fixed two arms 217 carrying at their lower ends a rod 218 provided with means for rotating it. Secured to the arms 217 are spring arms carrying a pressure roller 224, which may be moved away from the platen by turning the rod 218. On the rod 218 are clips carrying a scale 227 graduated to correspond with a scale marked on the margin &c. stop bar 123, and with a scale 228 at the front of the carriage. A pointer 229 on the bar 185 points to the scale 228. On the front bar of the carriage are two clips 230 on which are paper guides 236 and pivoted arms carrying small pressure rollers 235. A central guide 241 is pivoted on a small bracket secured to the front bar. Guide-strips 246 extend from the bar 174 to the rod 218. The ribbon spools 286 are mounted, by means of ball bearings, to run longitudinally upon but to rotate with their shafts 275. Each spool is enclosed by a carrier and ribbon guide 274 engaged by arms 260 of a shaft 261 to move the ribbon laterally. The shaft 261 is oscillated by a heart-shaped cam, driven in one direction only by a ratchet arrangement from tho spring drum 84. The cam operates a rod 256 connected to an arm of the shaft 261. On the shaft 261 are arms pivoted to rods 264 on the upper ends of which are rack teeth engaging pinions rotating loosely on sleeves on the ends of the spool shafts. On each of these pinions is a side ratchet 268 adapted to engage a pawl on a sleeve sliding on and rotating with the spool shaft. These sleeves are moved longitudinally in unison by means of pivoted frames connected by a rod, so that, when one sleeve is being driven by its ratchet 268, the other is disengaged. The pivoted frames are moved automatically to reverse the feed of the ribbon by arms pivoted in slots in the spools, which arms are held in inoperative position by the ribbon on the spools. When the ribbon on a spool becomes exhausted its arm is free to fall into operative position and reverse the feed. A ribbon guide-plate passes from one spool frame 274 to the other. Each shaft 275 is in two sections, the inner one with the ribbon thereon being removable.