Patent GB-191409890-A (GB)
Title: Improvements in Gas and Air Burning Burners.
Inventor: FENNEL JACOB WILLIAM
IPC: F23D14/12
Filed: 1914-04-21
Granted: 1915-02-25
Abstract: 9890. Fennel, J. W. April 21. Atmospheric gas burners.-In burner in which the air supply or the air and gas supply is automatically regulated by varying the pressure of the gas supply, the air-regulating shutter is vertically movable between the mixing- chamber and a surrounding perforated casing, and a normally stationary but adjustable nippleregulator is arranged in the mixing-chamber. In one form, the lower part 22, Fig. 2, of the burner, which telescopes into the upper part 23, is mounted upon a leather or other flexible diaphragm 6 forming the upper side of a gas chamber 4 or the gas-supply fitting. The longitudinally adjustable nipple - regulating screw 15 for engaging an inwardly-tapered hole 14 in the nipple is mounted within the mixing- chamber 25 in a yoke 20 extending through slots in the mixing-chamber 25 and connected to a perforated air shield 16, which is carried by a hood 10 on the rigid base of the gas chamber 4. Laterally spaced air-inlet apertures or slots of varying depth, and in some cases small perforations between these apertures, are formed in the part of the shield 16 surrounding the mixing-chamber, and a depending tubular shutter 26 resting on the top of the mixing- chamber slides within the shield 16. A spring 28 is inserted between a cap 27 forming the top of the shutter 26 and an adjustable nut 29 on the fixed part of the burner. When the gas is turned on, pure gas passes at first to the burner mouth and is ignited. The diaphragm 6 then expands under the pressure of gas and the burner rises together with the shutter so that parts of the air-inlet apertures are successively uncovered by the shutter, and the gas supply is reduced by means of the screw 15, the air passing at an angle to the mixing-chamber. Fig. 6 shows a burner in which the air supply only is regulated. The vertically movable airregulating shutter 126 is connected by a yoke 113 to a rod 112 resting on the top of the diaphragm 106 of the expansible gas chamber, but the lower part of the burner is connected to the gas-supply pipe below the gas chamber by a rigid bent pipe 114, the lower closed end of the perforated air shield 116 being secured on the upper end of the pipe 114. The nipple 125 comprises a hollow ovoid body made of resilient material and with crossslots 125<1>, and the area of the slots 125<1> is varied, when the mixing-tube is screwed up and down on the shank of the nipple, by the lower end of the mixing-chamber acting on the underside of the split nipple 125. A finger 131 on the mixing-chamber 123 engages a groove in a longitudinal bar on the shutter 126, so that the nipple can be adjusted by rotating the shutter. The two parts of the burner are rigidly connected together, and the tension of the spring 128, acting on the cap-shaped upper end of the shutter 126, is adjusted by a nut 129 on the mixing-tube. The diaphragm, which is enclosed in a dome-shaped casing 110, is secured to a depending flange on a base-plate 104, and the inner of two disks 107, 108, arranged on opposite faces of the top of the diaphragm 106, is provided with a grooved depending flange to which the diaphragm is secured by a clamping cord or wire 109.