Patent GB-190707204-A (GB)
Title: Arrangement for Automatic Lighting and Extinguishing Gas-jets by Changing the Pressure.
Inventor: OSCAR BERNHARD JOAKIM WILSON
Filed: 1907-03-26
Abstract: 7204. Wilson, O. B. J. April 25, 1906, [date applied for under Patents Act, 1901]. Void. [Published under Patents &c. Act, 1907.] Lighting and extinguishing gas.-An automatic apparatus operated by gas or air pressure comprises float, bell, and ratchet and cam devices. The float device, Fig. 6, consists of two vessels B, C containing a liquid and communicating by a flexible tube B'. The lower vessel B has an inlet L from the source of gas or air pressure and an outlet L<1> to the bell device, or to the lamp direct, controlled by a float V which may be guided by a pin Z. In the form shown, a tubular valve closes the outlet by means of a collar Wand an end plate V<1> when the float is in the raised position, and opens ports X, Y when the float falls ; a rubber washer r secures tight closure. The operating pressure is regulated by adjusting the height of the vessel C by means of a screw-and-nut device C<1> provided with an indicating-pointer f. The gas bell A has small outlet holes H controlled by an automatic valve I, K. A tube E secured to the bell telescopes on a tube F secured to the base. A slot D in the tube E and a slot R and a hole Q in the tube F allow the gas (or air) to pass through. A peg S on the tube F projects through the slot D to prevent the rotation of the bell and to limit its upward motion. The plug K of the automatic valve has a central stem M provided at the bottom with a collar N and normally rests on the top of the tube F. The seating of the valve affords a certain resilient grip whereby the plug K is lifted by the bell until the collar N abuts against a stop P on the tube F, when the plug becomes detached and falls and the outlets H are opened. The mechanism, Figs. 1 and 2, comprises two cam disks m, n and two pawls h, g mounted on arms a, a<1> (or on toothed sectors) which are connected to the bell A by links l, l<1> or by racks. The disk n has eccentric cam-surfaces and teeth 1, 2, 3, 4, 5, 6, and is rotated step by step by a tooth h<2> on the pawl h when the bell rises and by a tooth g<3> on the pawl g when the bell falls. Depending on the position of the eccentric disk n, the teeth h<1>, g<1> on the pawls h, g engage with or pass clear of teeth m<1>, m<2> on the disk m so as to rock that disk backwards and forwards, alternately, according to a certain cycle. In the form shown, one out of three operations of the bell is inoperative. The mechanism may be modified to obtain other cycles. The disk m may be attached directly to the gas cock k, or mounted on an axis b connected to the cock, or otherwise linked to the cock. A sliding weight e or the like locks the cock in the open or closed position. A disk c guides the pawls g, h. The whole apparatus shown operates as follows :-An increase of gas (orair) pressure depresses the float V and opens the valve passages X, Y, whereby gas (or air) passes to the bell A and lifts it ; near the end of the lift the valve I, K is released, so that, when the excess pressure is removed soon after and the valve passages X, Y are again closed, the bell A is free to fall, the enclosed gas (or air) escaping through the holes H. One such operation actuates the disk m one way and turns. the lamp on ; a second operation turns the lamp off ; a third operation is ineffective ; at the fourth the cycle begins anew. The automatic valve I, K prevents waste of gas (or air) during the lifting of the bell, but the bell would rise even without such valve, which may therefore be dispensed with if desired. In a modification, the bell and the disks mechanism are dispensed with and the valve X, Y controls the lamp directly. In that case gas pressure must be used and the variations of pressure must be permanent during the whole duration of each step of the cycle ; it is then also preferred to use a liquid-seal valve in the place of the valve X, Y. The lamps may be lighted by pilot-jets.