Patent GB-121824-A (GB)
Title: Improvements in or connected with Telegraphic Receiving Apparatus.
Inventor: WILLSON ETHELRED ALFRED
IPC: H04L15/32
Filed: 1918-01-07
Abstract: 121,824. Willson, E. A. Jan. 7, 1918. Strip-perforating receivers.-A ship-perforating telegraph receiver consists of a line magnet, two or more mechanical relays controlled by the line magnet, and a tape punch controlled by the mechanical relays. Each relay consists of a cam disk intermittingly rotated through a friction clutch and escapement mechanism which allows the cam shaft to be rotated through a semirevolution for each operation of the line magnet. The punches are operated by a cam disk intermittingly rotated through a friction clutch; and means are provided for reducing the pressure between the elements of the clutch before the motion of the cam disk is arrested by its escapement mechanism. The line magnet may be polarized or operated by currents of two strengths. The line magnet 36, Figs. 1 and 3, controls a steel tongue 37 adapted to engage two staggered radial arms 38 secured to a shaft 11 so that the shaft makes a semi-revolution for each movement of the tongue 37. The shaft 11 is driven through gearing 8, 9, and 10 and a friction clutch 14, 14<a> from the shaft 22 of an electric motor, and carries a cam disk 17 adapted to engage bell-crank levers 39. The levers 39 are connected by a link 41, Figs. 1, 3, and 6, having a pin-and-hole connexion with a vertical rod 43 mounted on a pin 44. The lower forked end of the rod 43 engages a stud 45 on a sliding plate 46, the movement of which is rendered quick and decisive by means of a spring-mounted roller 48 co-operating with a projection 50 carried by the pin 44. The plate 46, Figs. 4 and 6, carries adjustable plates 53 provided with lugs 52 which engage catch plungers 51 which form, with an arm 54 on the shaft 12, an escapement for this shaft, thereby allowing it to make a semi-revolution for each operation of the plate 46. The shaft 12 is driven through gearing 9, 10 and a friction clutch 15, 15<a> and carries a earn disk 18, Figs. 1 and 4, adapted to engage two bell-crank levers 55 connected by a link 57 having a pointed projection 58, Figs. 1, 4, and 5, which passes through a slot 59 in a lever 60. The lower end of the lever 60 is provided with a fork which engages a stud 62 on a sliding plate 63. A quick and decisive movement is given to the plate 63 by means of a spring-mounted roller 68 co-operating with the end of the projection 58. This biassing movement may be replaced by an armature on the end of the projection 58 and an electro.magnet. The plate 63, Figs. 2 and 5, carries adjustable plates 67 provided with lugs 66 which engage catch plungers 65 which form, with an arm 70 on the punch shaft 13, an escapement for this shaft, thereby allowing it to make a semi. revolution for each operation of the plate 63. The shaft 13, Figs. 1, 2, and 5, is driven through a friction clutch 16, 16a and carries a cam disk 19 adapted to engage a pair of rollers 71 carried on spring-controlled striking plates 72. The plates 72 operate " dot " and " dash " punches 73 and connector rods 74. The elements 16, 16a of the friction clutch are pressed together by a spring 33 operating through a lever 34, and the cam disk 19 is fitted with an adjustable disk 80 provided with two diametrically disposed cams 81 which engage screws 82 just before the escapement arm 70 engages the catches 65, thereby releasing the pressure between the clutch elements 16, 16<a> before the motion of the shaft 13 is arrested. The tape spindle 28, Figs. 1 and 2, is driven from the shaft 22 through gearings 21 and 25, By-wheel shaft 24, and a clutch 27.