Patent GB-190428909-A (GB)
Title: Improvements in Regulating Mechanism for Gas Lamps which includes the Lighting and Extinguishing of same
Inventor: JUSTICE PHILIP MIDDLETON
Filed: 1904-12-30
Granted: 1905-03-23
Abstract: 28,909. Justice, P. M., [Gregg, F. M.]. Dec. 30. Lighting and extinguishing gas.-Regulating mechanism for use with gas lamps provided will pilot jets is described in connection with @ actuation of gas valves or cocks at predetermined times, the valve - actuating mechanism bag operated directly from the spring or other mor instead of indirectly through the time-indicing mechanism, thereby ensuring that the clock winot become irregular and that the valve will be actuated at the correct times. A liquid-seal valve 7 for supplying gas to the main and pilot @ is actuated at predetermined times by mechanism driven by a clockwork or other motor, the gas supply to the pilot jet 10 being cut off while the main burner is alight, and vice versÔ. When the valve 7 is in the closed position, shown in Fig. 1, gas from the supply pipe 5 traverses a channel 6 to the inner of two concentric chambers formed by the depending flanges 11, 12 of the valve 7, and thence ascends by the channel 14 to the pilot jet. When. however, the rod 17 is raised by the actuating-mechanism, the valve 7 is lifted until the flange 12 is clear of the sealing-liquid, gas passes by the channel 13 to the main burner 1, and a valve 15 cuts off the supply of gas to the pilot jet 10 after the gas has been ignited at the main burner. Thumb-screws 16 are provided for controlling the gas supplies to both the main and the pilot burners. The central arrangement of the rod 17 ensures an even movement of the valve 7, and a cup 19 prevents an escape of gas through the bearing 18. The mechanism for actuating the rod 17 is contained within an airtight casing 9, and comprises a wheel 24 provided with studs 25, which, as the wheel is rotated by the spring or other motor, engages a spur 30 and turns a pivoted segment 26. By means of a dog 33, this movement so raises a pivoted lever 20 against the action of a spring 22 that the slotted extension plate 17<a> of the lever 17 falls to its lowest position. The lever 20 is caught and held in this position by a pivoted latch 35. The valve 7 is then in its lowest position, the flange 12 dips into the liquid seal, and gas can only pass by the channel 14 to the pilot jet 10. The position of the numerals on a disc 40, which rotates with the hand-wheel of the clock, with relation to a fixed mark 41 enables the time to be told, and the time at which the gas valve is to be opened or closed is determined by adjusting the pointers 42, by means of set-screws, relatively to the numerals on the disc. As the disc rotates, a pin 44 projecting from one of the pointers through a slot in the disc 40 actuates at the predetermined time the trip arm 37 of the latch 35, whereupon the spring 22 causes the released lever 20 to raise the rod 17 and open the valve 7. The rod 17 is immediately caught and held in its raised position by a detent 38, which engages a notch 39 in the extension plate 17<a> of the rod 17, so that the valve is held in its open position. Upon the release of the lever 20, the dog 33 is returned to its lowermost position by riding, if the segment is being moved by the clock, over the edge of a tumbler 26<1> located behind the weighted or other pivoted segment 26, or, if the segment is at rest, over the edge of both the tumbler and the segment. The dog remains in its lowest position until a notch 31 m the tumbler 26<1> registers with a notch 27 in the segment 26, which occurs only when the segment and the tumbler are in their lowest positions. The dog 33 then engages the notch in the segment and, by means of the next lug 25 on the revolving wheel 24, is raised to set the lever 20. Finally, when, in consequence of the rotation of the disc, a pin 45 on the second pointer 42 trips and releases the detent 38 from the notch 39, the valve 7 drops by gravity, cutting off the gas supply to the main burner and opening the supply passage to the pilot jet.