Patent GB-209242-A (GB)
Title: Improvements in transmitters for electric recording and signalling systems
IPC: G01F23/44
Filed: 1922-11-10
Abstract: 209,242. Wilson, J. S., Buckley, A. B., and Clark, W. Nov. 10, 1922. Addition to 163,773. Tell-tale apparatus.-The transmitting apparatus for signalling or recording at a distance described in the parent. Specification is modified by the provision of two impulse transmitters normally restrained from movement by two movable elements, either of which is released by a rotatable device in accordance with the nature of the movements received. Figs. 1 and 3 show apparatus for transmitting variations' of fluid level. The variations are communicated to a drum 1 by a tape 2 connected to a float. When the fluid level varies, the drum 1 rotates a shaft 9 which imparts motion to a planet wheel 12, through a wheel 10. The planet wheel 12 is mounted on a frame 14 formed integral with a sleeve 15 which carries a ratchet wheel 16 normally locked against rotation. The wheel 12 rotates an idle pinion 17 and thereby imparts motion to the wheels 18, 20 mounted on a frame 19. The wheel 20 meshes with a wheel 21 formed integral with a sleeve 22 upon which is fixed a ratchet wheel 23 normally held against rotation. The wheel 12 therefore imparts motion to the frame 19 which through a sleeve 24 rotates a shaft 27 of a counter mechanism 28. When the float moves through unit distance the counter 28 operates one or other of the lugs 29, 30 depending upon the direction of rotation of the shaft 27 to release one or other of the sectors 32 which rotates under gravity to make contact between the contact 35 carried by the sector and the contact 36 to send an electric impulse to the distant receiving apparatus. The downward move ment of the sectors is retarded by wind vanes 34. The completion of the circuit also energizes one or other of the electromagnets 43, 44 which attracts its armature and rocks an arm 46 and shaft 41. The shaft 41 imparts a sharp upward movement to the sector 32 through the link 40 and arm 37 upon which the contact 36 is mounted, to restore it to its initial position. The circuit is thus broken and the electromagnet de-energized, whereby the lever 46 actuates the pawl 47 under the influence of the spring 48 to step one or other of the wheels 23, 16 forward to restore the mechanism to its neutral position. When the electromagnet 43 is operated, this restoring movement.is communicated through the sleeve 22 to the wheel 21 and through the wheels 20, 18 to the sleeve 24 and spindle 27 whereby the previously operated lug is returned to its neutral position to retain the sector 32. If the electromagnet 44 is operated the restoring movement is communicated through the sleeve 15, wheels 11, 12, idle pinion 17, wheels 18, 20 to sleeroe 24. When more than one unit rise or fall of the float occurs, re-engagement between the lug and the sector will not take place until an equivalent number of impulses are sent. The Provisional Specification describes an arrangement in which the planet pinions associated with the float drum shaft and the counter spindle respectively mesh with a pair of toothed rings formed on the inner face of a drum mounted freely on the shaft.