Patent GB-669309-A (GB)
Title: Space heating device
IPC: F24C3/00
Filed: 1948-06-25
Abstract: 669,309. Burners igniting burners. LUNDSTROM, A. W. June 25, 1948 [June 28, 1947], No. 17114/48. Classes 75(i), 75(iii) and 126 [Also in Group XIII] A space heater, e.g. an air heating stove, comprises a combustion chamber 16 which is hermetically sealed relatively to the space to be heated, and is provided with a burner 24, a combustion air inlet 7 and an exhaust gas outlet 8 connected by adjustable conduits 10, 11 to a structure 9 which has openings associated with the inlet 7 and outlet 8 and is fitted with vanes 88, 89, 90. 92 to maintain a uni-directional flow of air and combustion products through the combustion chamber from the inlet to the outlet, the vane-fitted structure 9 and the combustion chamber being relatively movable towards and away from each other. In the air-heating stove shown, located on an outside wall. 3 of a room, the combustion air inlet 7 and exhaust gas outlet 8 are connected by telescopic extensions 10, 11 to a chamber 9 on the outside of the wall. The chamber 9 has an air inlet 87 and lateral hot gas outlets 91. Vertical baffles 88, 90 and a horizontal baffle 89 associated with the inlet 87 direct the incoming air through the passage 10, 7, and rearwardly converging vertical baffles 92 are associated with the outlet passage 8, 11 and outlets 91. The chamber 9 with its baffles reduce the effects of changes of wind direction and pressure on the combustion chamber. The combustion chamber 16, which comprises a single rear plate 15 and an upper and a lower front plate 14, 23, has internal and external vertical fins 20, 21 and a U-shaped baffle 18 associated with the outlet 8. The combustion chamber is mounted by brackets 77 in a convection casing 5 mounted in a casing 4 attached to the wall 3. A panel 13 with louvred air outlets 105 and inlets 107 covers the front. A detachable quartz window and an aligned observation port are provided in the front wall of the combustion chamber and in the panel 13 for viewing the burner. Gas burners.-The gas burner 24 comprises a tubular chamber 38 the walls of which converge from bottom to top and from its inlet end to its opposite closed end. The outlets in the top surface are transverse slots 36 which may be spaced to form a continuous wall of flame. The air inlet 42, which is shaped as shown in Fig. 15, is controlled by a plate 43 pivoted near its lower edge to move in its own plane by rotation of a screw 57 the flat end of which engages in a slot 56 in an extention 55 of the plate. 41 is the gas inlet. The burner is mounted on a plate 23 forming the lower part of the front wall of the combustion chamber. The burner has two bosses 45, 48 with a conical recess and a V-shaped recess respectively, to receive complementary projections on bosses 47, 49 on the plate 23. The burner is held in position by a nut and bolt 52 passing through a hole 51 in the web 50. Lighting burners.-A pilot burner 62 near one end of the burner 24 is shielded from draughts by a plate 94 extending across the combustion chamber. An associated frictional igniter comprises a plug 70 carrying a wheel 71 and spring-pressed flint 73. A cap 73a prevents leakage of combustion products.