Patent GB-190824925-A (GB)
Title: Improvements in or relating to Systems for Lighting and Extinguishing Gas Lamps over Distance.
Inventor: GROSSMANN AUGUST
Filed: 1908-11-19
Granted: 1909-05-13
Abstract: 24,925. Grossmann, A. Nov. 19. Lighting and extinguishing gas.-In a gas-lighting system wherein the lights are ignited by the discharge of an induction coil; an electro-magnetic device, operated by successive intermittent currents transmitted from a central station, controls the ignition and extinction of one or more lights. When the electro-magnet 10 is energized by current transmitted from the central station the armature 5 is attracted, raising the rod 44 and by means of the pawl 4 rotating the ratchet-wheel 3 and the gas-cock, which is connected thereto by a shaft 6, through an angle corresponding to one tooth. At the same time the insulating-block 13, which is connected to the rod 44, raises the spring 12 to the contact 14. When the electro-magnet 10 is deenergized, the pawl 4 slides over the next tooth to its former position, a spring-pressed pawl 49 being provided to prevent the wheel 3 from rotating backwards. As the wheel 3 rotates, an insulating- pin 16 on it presses the spring 15 against the contact 17. At each energization of the electromagnet 10 a circuit is therefore completed from the terminal 9 through the spring 12, the contact 14, and the spring 15 to the contact 17, and thence through the lead 56 to a trembler and the primary of the induction coil 18. The ends of the secondary of the induction coil are connected to insulated vertical rods 63, 64, the former being connected by a lead 69, a metallic tube 67, and a rod 65 to an insulated metallic disk 22, and the latter rod being connected to an insulated tube 85 through the tube 35, burner 34, and arms 86. When a current impulse passes through the primary circuit of the induction coil 18, sparks pass between the terminals 22, 25, igniting the mixture of gas and air which enters through the holes 84. A pointer which moves over a suitable scale is attached to the shaft 6. In a modification, the rods 63, 64 are lengthened and the tube 67 is dispensed with. The Specification describes in detail three forms of gascocks, the first being adapted to keep a light burning during the evening and part of the night, the second to keep a light burning all night, and the third to supply gas to two burners which are to be extinguished at different times. The last-named is shown in Fig. 13, which is a section through the pipe 76 leading to one lamp, and in Fig. 16, which is a section through the pipe 77 leading to the other lamp. Gas is supplied through the pipe 75 and passes through the duct 78 to the pipe 77. By tapering the ports 80, 81, these cocks may be so arranged that the gas is turned on and off gradually. The electro-magnets 10 of the various lamps are connected in series or the lamps may be arranged in series in leads which are connected in parallel, " evening-lamps " and " night-lamps " being used alternately. A clock - work mechanism at the central station is arranged to transmit a suitable number of intermittent currents to the lamps at predetermined times, or a relay or other suitable device may be used. For large towns having electric supply systems, the groups of lamps are connected in parallel across the supply leads and are controlled by relays connected in series with the clock-work mechanism or by a key at the central station.