Patent GB-190615067-A (GB)
Title: Improvements in Apparatus to be used in connection with Gas Lamps for Lighting and Extinguishing from a Distance
Inventor: ELTON EDMUND HARRY
Filed: 1906-07-02
Granted: 1907-05-23
Abstract: 15,067. Elton, Sir E. H., and Stephens, R. July 2. Valves controlled from a distance.-In apparatus operated by the action of the gas pressure on a bellows or flexible diaphragm, the valves 5, 6 for the main burner 3 and the pilot 4 are connected to or operated by a lever 7 connected by a link 10 to another lever 11. One side of this lever carries an adjustable weight 20; the other side lever 7 is operated and the lamp turned on and lighted. When the gas pressure is lowered, the reverse action takes place and the lamp is turned off. During the turning-on operation, the axis of the rod 14 moves away from the fulcrum 12 of the lever 11, while the relative position of the weight 20 is not materially affected. The pressure on the bellows is then more effective, so that the turning-off takes place only after the pressure has been reduced to a certain extent. An arm 11<a>, coacting with an adjustable stop 12<a>, limits the motion of the lever 11 during the turning- on and determines the extent of reduction of pressure necessary for the turning-off. The screw 22 provides further adjustment for the same purpose and also for the actual turning- on pressure, which may also be adjusted by means of the weight 20. When it is desired to operate the apparatus by temporary increases of pressure, a swinging rod 24 is arranged at the end of the lever 11 and is provided with a lateral projection which co-acts with a campiece 26. On a first temporary increase of pressure, the projection rides up the face 25 into a cam-slot in the upper part of the piece 26 and drops into a recess 28; the lamp is then alight. On a second temporary increase, the projection rides out of the slot and down the face 29, and has an oblique slot 22 wherein slides a block 13 adjusted by a screw 21. The block 13 is connected by a rod 14 to a bellows 15; a collar 17, a spring 18, a washer 44<A>, and a screw nut 19 secure the rod 14 to the bellows. When the gas pressure is raised, the pressure in the bellows overbalances the weight 20 and rocks the lever 11 whereby the lamp is turned off. For some purposes, it is required that some temporary increases of pressure in a cycle should be ineffective. For these cases, more recesses 28 may be arranged, for example, as shown in Figs. 2 and 2A. The cam-piece may be attached to a swinging rod and arranged to co-act with a projection fixed to the lever 11. In a modification, Fig. 3, the rod 24 is arranged to co-act with a rocking cam 30 rigidly connected to the lever 7 and fulcrumed at 30<*>. Fixed stops 36, 37 perform similar functions to the cam 26. The balance-weight may be replaced by a coiled spring attached, at one end, to the lever 11 by a screw adjustment 'resembling the block 13, and, at the other end, to the casing by means of an adjustable screw and nut. The adjust able block 13 may be modified, as shown in Fig. 4<A>. The bellows 15 is protected by a casing 16, and may be secured between the flanges 44, 45 of bushes 42, 43, or in a slightly modified way, or by means of a strong adhesive. Any leakage of gas is detected by a tube leading from the casing 16 to near the pilot burner. In cold climates, the apparatus may be kept warm by means of tubes 47, 48 which are heated bv the burners. The construction of the valves may be modified; for example, rotary or oscillating disk valves may be used.