GB670324A - Improvements in oil fuel-burning apparatus for domestic and other heating uses - Google Patents

Abstract

670,324. Liquid-fuel burners. PARR, K. Aug. 24, 1948 [Aug. 26, 1947; Sept. 19, 1947; May 14, 1948]. Nos. 22328/48, 22329/48 and 22330/48. Class 75(i). Oil burning apparatus comprises a vaporizing tube, having an upright portion 27 Fig. 1 containing a filter 33 and horizontal and downbent portions 28 and 30, the latter carrying a burner jet (not shown) the portion 27 communicating with a valve casing 4, Fig. 2, containing a non-return valve 22 adapted to control oil pulsations, a blowback valve 18, and a sliding device 9 adapted to be withdrawn to lower the level of the oil in the part 27 in order to extinguish the burner or to be reciprocated to clear an obstructed jet. The vaporizing tube is connected by a pipe 24 to a bored plug 16 screwed into the valve casing 4 and providing a seating for the blow-back valve 18 which is controlled by a spring 19 and has an inlet passage 21 having a wall 21a providing at its upper end a seating for the non-return ball valve 22. Oil fuel is delivered by gravity through a pipe 2 to an inlet passage 5 in the casing 4 controlled by a needle valve 6 operated by a handwheel 13 on the member 9. The latter is provided with an inner longitudinal recess having flat sides engaging a correspondingly shaped member 8 at the end of the needle valve member, which has an intermediate portion 7 screw-threaded into the casing 4. On opening the needle valve 6 fuel passes into the valve chamber 15 and raises the ball 22 without closing the passage through the plug 16. Should a pulsation occur in the fuel in the vaporizing tube the ball valve 22 will close and prevent the pulsation from passing to the fuel supply system; and in the event of an excessive vapour pressure within the vaporizing tube the valve 18 will be forced from its seating against the spring 19. As the latter at once closes the valve 18 upon the resulting reduction of the pressure acting against it the return flow of fuel through said valve occurs without surging. To extinguish the burner the needle valve 6 is closed by turning the handwheel 13, and the member 9 is drawn quickly outwardly to cause a suction within the valve casing 4 to open the blow back valve 18 and allow the fuel to flow back from the vaporizing tube. On re-starting the burner the member 9 is pushed inwardly and the needle valve 6 re-opened. The filter 33 may be of stainless steel wire wool which may be wound around with a wire strand or have a wire fabric jacket to facilitate insertion into the tube 27. The horizontal portion 28 of the vaporizing tube carries a flame deflecting plate 29, and a starting tray 32 for containing a light fuel for the initial heating of the vaporizing tube and nozzle (not shown) is mounted above the entry end of the tube 27. Specifications 2111/00, [Class 75], 286,150, [Class 75(i)], and 502,862 are referred to.