GB320323A - Improvements in methods and apparatus for producing mixtures of liquids and gases - Google Patents

Abstract

320,323. Chambers, E. T. July 3, 1928. Mixing fluids in flow.- Liquids are fed into gaseous fluids in motion through an inverted capillary nozzle, the head of liquid above the nozzle being made less than that required to balance the capillary and surface tension effects by a considerable margin. The method is generally applicable, but the particular applications mentioned are carburetting-apparatus, oil fuel vaporizers or atomizers and blow lamps. A carburettor based on this method comprises a float chamber 2 supplying fuel to a chamber 20 surrounding a sleeve 4 which carries the fuel nozzle and is mounted on the air intake conduit 5. The fuel nozzle comprises either a series of capillary passages or an annular capillary passage 9 formed between a sleeve 6 and an inner member 7, the lower ends of the parts 6, 7 being made thin or knife edged. The member 7 is provided with a fuel controlling restriction 10 forming part of a larger fuel inlet passage 16 and opening into an annular passage 11 communicating with the passage 9. Preferably the upper edges of the sleeve 6 and member 7 are above the fuel level 3, and a siphon cap 12 is provided dipping into the fuel. The area of capillary passage 9 is greater than that of the restriction 10, and its dimensions and the shape of the lower edges of the parts 6, 7 are such that the head necessary to overcome the capillary and surface tension effects is considerably greater than the distance of the fuel level above the lower edge of the nozzle. The fuel nozzle is situated above the top of the intake passage 5 and the outlet is provided with a baffle 15 open on the engine side only. A butterfly throttle 13 is provided and may be formed with two orifices, which may be adjustable, one adjacent the baffle 15 and one remote therefrom, rich mixture and air being respectively supplied through these orifices for slow-running when the throttle is closed. When applied to an oil fuel vaporizer or atomizer, air under pressure is supplied by a blower to an apparatus as described above, the top of the fuel tank and float chamber being connected to the conduit 5 between the blower and the throttle valve. When applied to a blow lamp, the compressed air may pass through a valve of definite proportions and weight and part of the air on the supply side of this valve may be led to the float chamber.