Patent GB-190816707-A (GB)
Title: Improvements in Automatic Cypher Printing and Transposing Apparatus.
Inventor: SCOTT PERCY MORETON
Filed: 1908-08-08
Granted: 1909-11-06
Abstract: 16,707. Scott, Sir P. M. Aug. 8. Index type-wheel machines for coding and decoding.-Relates to machines in which two type-wheels, for printing a message in code and clear respectively, are mounted on a shaft connected to setting-mechanism and are relatively adjustable to change the code. The machines comprise a vertical plate 26 on which the parts are mounted, keys for operating impression-mechanism and mechanism for spacing a web or webs on which the message is printed, and means of the following character for adjusting the type-wheels relatively. According to the Provisional Specification, the plate 26 may be secured to a base-plate which may form the bottom of the containing-box. In the machine shown in Figs. 1 and 2<a>, the type-wheels 6, 7, for code and clear respectively, are mounted on a shaft 10 connected by bevel-gearing 9 to a setting-knob 8, the type-wheels being provided with index dials 21, 21<a> which can be read by a pointer 21<o>. The type-wheel 7 is coupled to the type-wheel 6 by a pin 19 engaging one of a series of holes 20. The type-wheel 7 is prevented from moving laterally by a detachable cap 15 secured to the shaft by a bayonet joint and preferably formed in two telescopic parts 15, 16 with an interposed spring 17, to permit the type-wheel to be adjusted without detaching the cap. To prevent obstruction of the view of the dials, the bevelgearing may operate a pinion arranged between and in gear with the type-wheels. In this construction the type-wheels are normally coupled by a spring-pressed clutch-ring which yields when the type-wheel 6 is locked by a catch, the knob 8 being then used to adjust the typewheel 7 relatively to the type-wheel 6. In the machine shown in Fig. 6, the type-wheels 6, 7 print on separate webs 1, 1<a> and a device is provided for automatically stepping forward the type-wheel 7 on each actuation of the machine. The type-wheel 7 is secured to a telescopic part 10<a> of the shaft 10 to which the type-wheel 6 is secured, the part 10<a> being provided with a toothed wheel 40 normally engaging a pallet-wheel 39 secured to the shaft 10. The part 10<a> engages the forked end of a lever 42 which is arranged in the path of a roller on the impression mechanism. When the impression key is depressed, the type-wheel 7 is moved over the web 1<a>, and the wheel 40 is withdrawn from the wheel 39 and moved into contact with fixed pallets 45. When the impression key is released, the lever 42 is returned by a spring and the wheel 40 re-engages the wheel 39, the pallets 45 and the wheel 39 moving forward the type-wheel 7 one step at each operation. Alining for impression.-Alining-pegs 22, Fig. 1, on the dial 21 co-operate with a pawl 23 and a part 24 on the sliding impression hammer 11 described below. Hammer-impression arrangements; letterspacing mechanism.-The impression hammer 11, Fig. 1, is mounted in guides 12 and is actuated by a roller 14 on a key-lever 4. The web 1 and an ink-ribbon pass between rollers 3, 31, the roller 3 being provided with a ratchetwheel 30 actuated by a pawl 27 on the keylever 4 or, through a bell-crank 29, by a pawl 28 on a space-key lever 5. A single pawl mounted on the space-key lever may be employed, the impression-key lever having a pin which overlies the space-key lever. In the machine shown in Fig. 6, employing separate webs 1, 1<a>, hammers 11, 11<a> are provided and the shaft of the feed-rollers 3 is provided with a ratchet-wheel actuated by keys 4, 5 in the manner described with reference to Fig. 1. Web-cutting arrangements.-The single web 1, Fig. 1, may be divided longitudinally on or after leaving the roller 3 by means of a rotary or other cutter, or by means of a perforator actuated by the keys 4, 5.