Patent GB-189719002-A (GB)
Title: Improvements in Type-writing Machines.
Inventor: ELLIOTT GEORGE CRAWFORD
Filed: 1897-08-17
Granted: 1897-10-02
Abstract: 19,002. Elliott, G. C., and Hatch, W. P. Aug. 17. Type-writers.-Relates to machines for writing on books. The base or platen 1 is covered with rubber &c. 3, and is provided with hooks on its rear end, by which it is pivoted to a bar or shaft. Pivoted by hooks to the same shaft is a clamping-frame 4, 5 for holding the leaves of the hook spread out on the platen. Sliding along the side bars 4 of the clamping-frame is a frame or carriage 11, 11<a>, which is moved along for line spacing by a pawl arrangement engaging a rack on one of the bars 4. Running on the bar 11<a>, and on a bar 13 mounted on brackets of the lower carriage 11, 11<a>, is the printing-carriage, the frame of which comprises a ring 17, ring 45, and bracket 18, &c. On the bracket 18 are grooved rollers 20, 23 engaging the bar 13 which forms a pivot on which the printing-carriage is hinged. Rollers 26 run on the bar 11<a>. The carriage is moved for letter spacing as follows :-In arms projecting from the bar 13 is a bar 15 carrying a rack 48 with which co-operate spacing-dogs 46, mounted in a bracket 50 of a rock shaft 51 journalled in the bracket 18 of the carriage. The carriage is drawn along by a spring. The shaft 51 is rocked by an arm 63 engaged by the hooked ends of rods 64 and 57<d> connected to spacing-frames having bars 53<b> and 57<b> extending under the key levers 74. The bar 57<b> is also operated by hooks 59<c> of a spacing-frame 58, 59 having a spacing-key or bar 59<a>. The rack 48 may be disengaged from the dogs by a lever 65 which lifts the bar 15 and the rack. The disengagement of the rack-bar is prevented when the carriage is lifted by a weighted catch 69 which engages and locks the lever 65. A similar catch 72 engages the underside of the bar 15. The key levers 74 are provided with keys 73, and are connected by rods 75 to short arms of the type-bars 76. In the end of each type-bar is pivoted a head having two types 79, 79<a>, one of which is normally in position to print and is so held by a spring 80. When it is desired to print the other type, a ring 89 is moved down into position to engage an arm of the type head, as the type-bar moves down to the printing point. The type head is thereby rocked, and the spring 80 rides over to the other side of the projection 81. The ring 89 is carried by a stem 88 operated by a lever 86 and a shift key lever 90, 91. When the type head returns to normal position, its arm striking the ring 45 returns the type head to its normal position. On each side of the carriage is a spool 96 for the ink-ribbon. Either spool may be operated by pawls on levers pivoted on a movable plate 103, the levers being operated by engagement at 102 with the arm 63. The ribbon passes through a pivoted guide which may be swung by operating a key lever to move the ribbon to expose the writing. The writing may then be seen by looking down through the ring 45. A scale bar 119 carried by arms 118 rests on the paper, and a pointer on the carriage moves over it. Another scale 16 is provided over which a pointer on the carriage moves. On the bar 13 may be provided adjustable margin and carriage stops and an alarm bell. In order to raise the bar or shaft at the rear of the machine to which the base 1 and frame 4, 5 are hinged, it is carried by the upper ends of two parallel links the lower ends of which are pivoted to brackets fixed to the table or support. One of the links may be held in any raised position by a ratchet and pawl.