Patent GB-190013728-A (GB)
Title: Improvements in Typewriting Machines.
Inventor: JAMES REGINALD WILLIAM
Filed: 1900-07-31
Granted: 1900-11-17
Abstract: 13,728. James, R. W., [Union Typewriter Co.]. July 31. Type-writers. - The frame comprises a base 1 having two front corner standards 2 and two rear ones 3 supporting the two parts 4, 5 of the top plate, which is divided transversely of the machine. The type-bars 6 are pivoted at 8 in hangers 9 engaging in radial slots 10 in a segment 11 fixed in oblique position by the uprights 12 and bracket 13. Two of the hangers 9 are secured by one screw 16. On the type - bars are formed eccentric toothed segments 22, engaging eccentric segments 21 on levers 20 pivoted at 19 in the hangers 9, and connected by adjustable links 31 to the key levers 23. The eccentricity of the segments 21, 22 causes the type-bars to move with increasing speed as they move up to the platen. The key-levers 23 are pivoted on a common fulcrum 24, and are pulled up against a pad 34 by springs 26 connected to hooks 27 formed on an angle bar 28 screwed to the base 1. The type-bars rest against a padded stop 17. The paper carriage frame comprises front and rear bars 35, 36 and end bars 37. The bars 35, 36 are grooved and run upon bars 38, 39 connected by cross-bars 41 and screwed to blocks 43 on the framing. Balls 44 are placed in the grooves, and are kept at the required distance apart by rings on the ends of distancestrips 46 lying in the grooves. A book 48 on the bar 35 engages a groove 50 in the bar 38. On the ends of the carriage frame are brackets 51 in which are fulcrumed at 56 and 69 two pairs of substantially-parallel arms 55 and 64, the outer ends of which are pivoted to the carrier or frame 54 in which the platen 53 is journalled. The platen is shifted by these arms 55, 64, for "upper case" &c. work, in a direction substantially parallel to the face of the types 7 when they are at the striking point. The platen is shifted by means of extensions 73 of the arm 64, which are connected by a transverse rod 74 embraced by the upper forked end of a rod 78 having a grooved roller 80 engaging the lever 74. The rod 78 is connected to a transverse lever 82 connected by a rod 87 to a lever provided with a shift key 90. A slot in the rod 78 engages the fixed member 100 of the framing. Stops limit the shifting movement of the arms. The weight of the platen is partly balanced by a spring 91 connected to the bar 74 and to the carriage frame. The carriage is propelled by a spring drum 92. A rack 95 is secured in the underside of a sleeve surrounding the pivot rod 69, and gears with a pinion 97 on a shaft carrying an escapement-wheel 99. The bearing 100 of the shaft is cast upon a standard 101 screwed to the cross piece 41 of the fixed carriage rail framing. The escapement dogs 103, 103<a> are upon a rocker on a shaft 105 having an arm 106 with an adjustable screw 113 engaging a universal bail 108 carried by arms 109 removably pivoted by the caps 110 on the fulcrum rod 24. Hooks 107 on the key levers engage and operate the bail 108. The carriage frame comprises flanged end caps 54 connected by transverse rods 115 and 116 fixed in ears or lugs 117 on the end caps. The caps are also connected by a curved plate or shield 119 surrounding the lower portion of the platen. The platen shaft 121 is journalled in radial arms fixed in the end caps. Depending from the rod 116 are arms 123 carrying a pressure roller 124 pressed by curved springs 126 attached to brackets 128 fixed to the rod 116. The tension of the springs 126 is adjustable by screws 129. A paper shelf 130 is attached to the brackets 128. A release lever is pivoted on one end of the platen shaft or hub, and is connected by a rod to an arm on the sleeve 96. By this arrangement the sleeve 96 may be rocked to disengage the rack from the pinion 97.