GB252448A - Improvements in injectors for gas burners - Google Patents

Abstract

252,448. Keith & Blackman Co., Ltd., J., and Keith, G. Feb. 24, 1925. Atmospheric gas burners. - In a burner for bread and biscuit ovens or the like, a venturi-tube 1 is adapted to be moved axially in the burner body 2 relatively to a nipple 4 for regulating the air supply and against a plug 9 for shutting off at will communication through the tube between the interior and the exterior of the oven or the like, the arrangement being such that the restoration of the original connection suffices for the proper re-setting of the air inlet adjustment. The nipple 4 is carried by an axially adjustable plug 16 having apertures 7 communicating with the gas supply pipe 3 so that, particularly when producer gas is used, the nipple may be withdrawn from a seatmember 8 to allow additional gas to pass around it into the tube 1. The plug 9 is removable for cleaning purposes. In one form, the tube 1 is operated by a handle 12 pivoted on a pin 13 and carrying a pin 12<1>, which passes through a slot 14 in the body 2 into a groove 15 in the wall of the tube 1, the movement of the tube away from the plug 9 being limited by an adjustable screwstop 16, locked in position by a transverse screw 17. In a second form, the tube 1 is provided with a pin 18, Fig. 4, passing through a slot 19 in the body 2 and through a tapered aperture 20<1> in a pivoted handle 20, an adjustable screw stop 22 being provided. In a third form, the tube 1 is provided with a transverse operating handle which passes through an inclined slot in the body 2.