Patent GB-190426803-A (GB)
Title: Improvements in Typewriting Machines.
Inventor: JAMES REGINALD WILLIAM
Filed: 1904-12-08
Granted: 1905-03-09
Abstract: 26,803. James, R. W., [Monarch Typewriter Co.]. Dec. 8. Type-writers.-Relates to type-writer carriages, interchangeable platen frames, carriage-releasing mechanism, tabulating- mechanism,. margin-stop mechanism, and displaceable ribbon guides. The carriage truck 6, Fig. 2, is supported by antifriction balls or rollers 7 between rails 8, 9, which are connected near the ends by brackets or frame pieces 17, and are supported intermediately by arched brackets 10 of U-shaped cross-section. The interchangeable platen frames, of different lengths, comprise end pieces 34, 35, Figs. 2 and 9, connected by rods 36, 37. The frame is hung on brackets 31 or 32 on the truck 6 by means of rods 44 mounted in the end pieces 34, 35. The truck 6 consists of upper and lower rails connected by cross - pieces, and projections 49 on the end pieces 34, 35, interlock in the spaces between the truck rails. Latch levers with finger-pieces are provided on the platen frames to prevent accidental tilting and consequent disengagement of the projections 49. The short platen frame is provided with a release lever 69, Fig. 9, which actuates a lever 72 and raises the rack-bar 21 ; in the case of the long platen frame, the release lever bears directly under the arm of the rack-bar. An ordinary paper-table is carried by brackets 45 on the end pieces 34, 35. Feedrollers 158, Fig. 12, are mounted on a rod 157 connecting spring-pressed arms 156 pivoted on the rods 44. Pressure rollers 164 are mounted on a rod 163 connecting spring- pressed arms 162 pivoted on the end pieces 34, 35. The feed-rollers 158 lie in openings in a spring- pressed apron 166 mounted on a rock-shaft 168. short arms 170 on which project in position to engage lugs on the arms 156. On rocking the shaft 168, the parts 158, 164, 166 are moved away from the platen. A platen plate 172 graduated as a platen scale and a carriage scale is supported by spring arms 173. A stop on the truck 6, Fig. 2, co-operates with stops 95 on a notched oscillatory tabulator bar 96, Figs. 2 and 5. The bar 96 is mounted on the brackets 17. At one end, the bar 96 passes loosely through one bracket 17. At the other end, the bar 96 is formed with a central longitudinal opening 98, which fits loosely over an adjustment rod or pin 99, which is of length sufficient to permit of longitudinal movement of the bar 96 for access to parts behind the brackets 10. A spring 104 lies in a slot in the pin 99 and extends into an annular groove 103 in the opening 98. The hub 107 of the arm controlling the rocking of the bar 96 is loosely mounted on, and has a pin or screw and slot connection 108 with, the bar 96. The controlling-arm is actuated from a link 120, Fig. 2, connected to a lever 118 having a pin-and-slot connection 115, 116 with the tabulating-key lever 113. A rock-shaft 128 is interposed in the connections in order to carry the connections out to the end of the long tabulator bar. An arm 125 on the link 120 actuates an ordinary release device for the feed-rack. The margin stops are mounted on an extended oscillatory bar 132 mounted in brackets 133 on the rail 9. An arm 134 of the bar 132 has a pin-andslot connection with a link 137, which is pivoted to a yoke frame 140 mounted on the rock-shaft 128. The frame 140 is linked to a bell-crank lever 143, which is held against stop-pin 148 by means of a spring 149, and is connected to a push-rod 151 carrying the margin release key 152. The vibratory ribbon-guide plate 74, Fig. 10, moves in a pivoted guide-frame 75, which can be be displaced by means of a spring-retained link and a lever 86. The lever 86 is forked to embrace the rod 37 and lock the frame 75 in its normal position, and is automatically actuated by the rod 37 on removal or insertion of the platen frame.