Patent GB-165818-A (GB)
Title: Improvements in and connected with typewriters and like machines
IPC: B41J1/04
Filed: 1919-03-03
Abstract: 165,818. Harrington, F. C. A. March 3, 1919. Type-lever machines; keys; locking-devices.- The operative parts are supported on the upper surface of a base-plate of sheet metal which is formed with strengthening-flanges, ribs, or channels, running in one or more directions. The operative parts consist of sheet metal and are made in standard sizes to facilitate replacement. In the machine shown in Fig. 1, the base-plate 10 is formed with longitudinal and transverse strengthening-channels 11, edges flanges 12, and struck-up lugs, referred to below, for supporting the operative parts. The key-levers 14 are provided with keys 67 which may, as shown, be integral with the key-levers or be of any of the other constructions described in Specification 165,870. The space-bar levers 16 are pivoted on lugs 15 on the base plate and are provided with an integral finger-piece 67. The type-levers 71 are as described in Specification 165,870 mounted on links 69, 72 and are adapted to move from an inking-pad 21 to the platen roller 65. The links are pivoted on brackets 70, 73 which are attached to the base-plate. The key-levers 14 are connected to the links 69 and are pivoted on a rod carried by lugs 13 on the base-plate. The base-plate supports a detachable hood 80 formed with parts 78, 81 for covering the key-levers and type-levers respectively. The machine can be locked by moving a plate 82, Fig. 8, into position for obstructing the type-levers. The plate 82 is adjustable on the part 81 of the hood, and the part 81 is vertically adjustable. The part 81 and the plate 82 are secured by nuts 83, 84 and may also be provided with key-actuated locks. Paper carriages and supports; carriage-shift mechanism; shift-key actions; sheet feeding and guiding arrangements.-(i) The shift carriage 25 consists of a plate formed with ears 34 which carry rollers 35, and are formed with hook parts 36 for engaging rods 24. The rods are, as described in Specification 165,866, mounted in sleeves 23 attached to supports on the base-plate; as shown, the sleeves are formed on lugs 22 on the base-plate. The paper-carriage 30 consists of sheet-metal channels 30<a> which are connected by cross plates 44 and end plates 43. The channels 30a are provided with rollers 46 and hook parts 45 for engaging rails 32, mounted on lugs 31 on the shift carriage. The platen roller 65 may be of the construction described in Specification 165,869 and be provided with the linespacing mechanism described in Specification 165,871. (ii) The shift mechanism may comprise levers 27 which are pivoted on lugs 26 on the baseplate and are engaged by the slotted ends of shiftkey levers 27a which are pivoted on lugs on the base plate. Or, the shift mechanism may be constructed in the manner described in Specification 165,866. (iii) the paper-carriage is provided with aprons 51, 53, and the platen roller 65 co-operates with a feed-roller 64 which is carried by a releaselever 63. Printing-point indicators.-A printing-point indicator 42 is pivoted on lugs 41 formed on arms 38 on the shift carriage 25 and is connected by a link 142 to a. rocking plate 19 in connection with the letter-spacing mechanism. The indicator is as described in Specification 165,868 provided with two pointers for indicating the printing point on a scale 66 and the platen roller respectively. Letter-spacing mechanism.-The paper-carriage 30 is propelled by a spring drum 29 which is mounted on a lug 28 on the base plate. A rack 47 on the paper carriage gears with a pinion 48 which is connected by a one-way clutch 49 to an escapement mechanism 50 operated by a plate 19 which is pivoted on a lug 37 on the shift carriage 25. A universal bar 18, engaged by the key-levers, operates the plate 19.