Patent GB-686602-A (GB)
Title: Improvements in or relating to gas-regulators for gas burners
IPC: F23D14/48
Filed: 1950-05-09
Abstract: 686,602. Gas burners. HOMANN, W., [trading as HOMANN-WERKE W. HOMANN]. May 9, 1950 [Jan. 30, 1950], No. 11550/50. Class 75(i) In a gas control device for the injector nozzle of a burner a valve member 61 for shutting off and controlling the gas and a device for regulating the cross section of the discharge opening 22 of the nozzle are mounted on a common stem 5 and are actuated by an operating member 11 which is separately constructed from the valve member and regulating device and which on rotation first opens the valve to its fullest extent and on further rotation to a setting determined by an abutment closes the valve to a condition of reduced gas flow, the total operating rotation of the member 11 being less than 360 degrees. The upper end 23 of the stem 5 is cone-shaped and enters the discharge opening 22 to regulate the cross-section thereof but at the fully open position of the valve 61 the stem is completely withdrawn from the discharge opening. The cone shaped end of the stem may close completely the discharge opening. The valve member 61 is guided by a tubular extension of the common casing for valve and regulating device and has a conical surface 6 urged against a seating 7 by a spring 16 acting between a shoulder on the casing and a slotted collar 8 screwed on to the valve stem. The operating member 11 comprises a shaft rotatably mounted at right angles to the valve stem in a side extension 10 of the valve casing and provided with an eccentric pin 15 which engages a loose disc 9 resting on the slotted collar 8 of the valve stem. The reduced flow condition of the valve is determined bv the abutment. of a pin 63, Fig. 2, on the shaft 11 with the end of a screw 35 threaded through an arm 50 extending from the valve casing. The extent of the opening of the valve is determined by the position of the slotted collar 8 on the stem. The shaft 11 has a spherical gas sealing surface 12 pressed against a conical-surface 13 on the casing-extension 10 by a spring washer 14 retained by a band 55 encircling the casing. The gas nozzle comprises an aperture member 20 rotatably seated in a member 19 screwed into the valve casing and having a bushing 21 through which the valve stem passes. The aperture member has slots which co-operate with openings in the seating member to form a hit and miss type gas valve. The gas is injected vertically upwards into the open end of a vertical mixing tube formed in two relatively movable parts, the lower part 30 being adjustably screwed in a sleeve forming the upper part of the valve casing and joined to the main part thereof by two struts 56. The sleeve is secured in an opening in a tray 32 held in an opening in the top plate 18 of a cooker by two small angle pieces 36 secured by screws to the trav. The burner 44 is held on the upper edge of the tray 32 by four ribs 47 engaging four slots 48 therein. The gas supply tube 38 passes below the middle of the burner and the lower tubular end of the valve casing is clamped to a saddle piece 39 soldered to the supply tube. A handle mounted at the front of the appliance is connected to the operating member 11 by a tube 52 having a slit in each end engaged by pins on the handle and operating member and the end of the operating member engaging the tube is ball-shaped.