Patent GB-453881-A (GB)
Title: Improvements in or relating to cocks and igniting devices for gas burners
IPC: F23Q9/00
Filed: 1935-03-21
Abstract: 453,881. Manually-operated valves. HORSTMANN GEAR CO., Ltd., and HORSTMANN, B. G., Newbridge Works, Bath. March 21, 1935, Nos. 8854 and 27454. [Class 135] [See also Group XI] A pilot jet valve 9 for gas burners is moved from the closed or nearly closed position to the fully open position against spring action by the limited relative angular movement of an operating member 14 on the main valve stem after the main valve 5 has been fully opened, and is returned to its initial position under spring action on release of the operating member. The angular movement of the member 14 against the spring may also be utilized to complete the circuit of an electric igniting filament. The device shown in Figs. 1, 2 comprises a casing 1 having ducts 7, 8 leading a pilot gas supply to the valve 9 from a bore 6 connecting the inlet 2 and outlet 3. After passing the valve 9, the gas enters a chamber 10 whence it passes to an outlet 4 leading to a pilot jet. The member 14 is in the form of a plate arranged above a recessed plate 12 fixed on the stem of the valve 5. The plate 14 is pressed towards the closed position of the valve 5 by a spring clip 16 bearing against a stud 17 on the plate 12 and anchored at its other end on a stud 18 on the plate 14. The retraction cf the spring is checked by a cam stud 15 under the plate 14 engaging the upper side of the recess 13. On operation of a cable 23 such as is described in Specification 328,204, [Class 135], connected to a piston 21 having a pin-and-slot connection with the plate 14, the plate 12 is brought against a stop 24 and the stud 15 moves on in the recess 13 and depresses the valve 9 against its spring 25. A contact 26 on the valve 9 at the same time engages a contact 27 supported on an insulated spring plate. On releasing the cable, the valve 9 closes and the plates 12, 14 revert to the position shown in Fig. 1. In Fig. 4, the angularly movable member is formed integrally with the handle 30 and moves relatively to the main valve stem by virtue of the pin and slot arrangement 31, 32 against a torsion spring 33, the said relative movement enabling a cam 34 on the handle, by means of a headed plunger 36, to press the spring- loaded ball valve 37 from its seat. In a modification of this form, the plunger 36 is depressed by a cam surface on a spring-pressed bell-crank engaged by a pin on the handle 30. In other modifications the member 36 may be threaded and carry a pinion at its outer end, this pinion being rotated by a toothed gear on the handle 30 or a spring-pressed rack depressed by a pin on the handle. The cam 34, Fig. 4, and the bell-crank lever in the modified form may be dispensed with by making the slot 32 inclined to the axis of the handle 30. The first Provisional Specification refers also to the use of the distant control device described in Specification 327,943, [Class 80 (iii)], and describes a further adjustable pilot supply and also a pilot valve supplying two pilot jets. According to the second Provisional Specification the pilot valve spindle may be rotated a pin on the operating handle engaging a notch or teeth on the head of the said spindle.