Abstract: A fuel ignition arrester system that has a feedback control to maintain the fuel/air mixture in the ullage of a fuel tank above the flammability range. The system uses a photoelectric detector to signal when the fuel/air mixture concentration falls or rises to a predetermined concentration value. The predetermined value is selected to be higher than the upper limit of the flammability range so that the fuel/air mixture is maintained above the range and, thus, incombustible. A fuel pump and piping system with nozzles is arranged to inject fuel into the ullage when the concentration falls to the predetermined value and to stop injecting fuel when the concentration rises to the predetermined value. A flammability detection system includes the detector and a controller that produces an annunciating signal when the fuel/air mixture concentration is equal to or between the upper and lower limits of the flammability range.

Abstract: A carburettor for a motor on a marine craft, with lower part 1 holding fuel 2 is provided with flexible piping 12 communicating at each end with openings 13, 14 both in the said lower part. The piping 12 preferably has an enlarged intermediate portion 16. If the carburettor is inverted e.g. upon vessel capsize, the fuel 2 drains into the piping 12/16, which is dimensioned to hold the fuel so that, when the vessel is righted the fuel drains back into the lower portion 1 without detrimental loss of contamination.

Abstract: Disclosed is a carburetor for internal combustion engines which minimizes the effect on the engine of carburetor ice.To overcome the effect of ice build-up the throttle valve on the side adjacent the idle jet, is bent upstream, thus providing a greater opening between the idle jet and the adjacent part of the throttle valve and a lesser opening on the opposite side of the throttle valve at idle and intermediate throttle openings. Increasing the operating angle of the idle jet half of the throttle valve upstream, toward the vertical position, deters the build-up of ice. Furthermore my invention exposes an ice deposit to the incoming fuel-air mixture, causing early erosion of the same and elimination of prolonged operation with over-rich or lean mixtures.

Abstract: A high velocity carburetor comprises a housing defining an air flow conduit with an air valve member therein. The air valve member includes a curved air-conducting surface facing the air stream and at least one position of the member for establishing a vortex flow. Fuel is supplied through the axial center of rotation of the air valve member to the conduit and into the vortex stream for facilitating atomization of the fuel into the air stream. The valve member is J-shaped or cylindrical. A fuel metering device is provided through the axial center of rotation of the air valve member which includes an axially movable but rotationally fixed inner fuel conduit mated to a rotationally movable but axially fixed outer tube. A cam is provided on the outer tube with a cam follower on the other tube to establish a needle fuel valve or metering fuel to the air conduit. This carburetor can be used in either a power-increasing or a fuel-efficient mode.

Abstract: A vertically oriented carburetor for use in a model jet aircraft power plant having an essentially circular duct and a multibladed fan. The carburetor utilizes an essentially cylindrical body having a web portion to permit airflow from the fan for cooling the cylinder of a model engine and a forwardly oriented carburetor air opening for receiving pressurized air from the fan. Concentric fuel feed and throttle tubes have their adjustments for control at the top end so as to be external to the power plant circular duct to eliminate interference with the propulsion airstream from the fan.

Abstract: A carburetor having a tapered plug adjusting air flow into the throat of a carburetor housing air passageway. A control arm connected to the plug and guided by a groove in the housing shaped to move the plug more rapidly in the upstream than in the downstream portion of the plug travel. A stationary fuel supply tube in a bore in the plug so that movement of the plug controls flow out of the fuel supply tube outlet. The outlet is sheltered and has adjacent baffles to resist fuel pickup in engine air blowback. A needle valve spindle located at the opposite side of the housing from the propeller.

Abstract: Disclosed is a carburetor for internal combustion engines having mechanism substantially to eliminate the effect on the engine of carburetor ice. When ice builds on the downstream face of the butterfly valve, on the side adjacent the idle jet, there is such a reduction of pressure at the mouth of the idle jet as to cause fuel starvation in the main jet, thus causing improper fuel air ratios or engine failure. To overcome this, mechanism is provided to vent the idle jet passage to atmosphere whenever the butterfly valve is in position for the main jet to become the primary source of fuel supply. Further, by venting the idle jet as indicated, the presence of ice on the butterfly valve will not produce the heretofore over-rich or lean mixtures, found to exist. Furthermore, such venting is useful for preventing dieseling in automobile engines.

Abstract: A carburetor of the type admitting simultaneous control of both air and fuel supply. The air supply is regulated by means of a linearly movable aperture means, whereas the fuel supply is regulated by means of a linearly movable rod means provided with groove means having a transverse profile of monotonically varying area. A selectable portion of said groove means can be coupled into a fuel conduit, thus regulating its effective size and thereby the fuel supply by means of a linear movement of said rod means. Said rod means and said aperture means are coupled for mutually proportional linear movement, thus accomplishing the simultaneous control. By appropriate manufacturing of the groove means it is possible to obtain improved fuel-to-air ratio for settings between idling and full gas. The rod means also works as a plunger in a cylinder, thereby rendering an accelerator pump function.

Abstract: An updraft carburetor of the type used on normally aspirated light aircraft engines and having a manually operable cable controlled mixture mechanism is provided with a biasing device which urges the mixture mechanism toward the full rich position to prevent engine failure in the event of cable failure.

Abstract: A carburetor comprising a body, means to secure the body to an engine, a barrel rockably mounted in the body and means for rocking said barrel means defining a passage extending through the body and the barrel to an engine which passage can be restricted by rotation of the barrel relative to the body, the part of the passage through the body and the barrel being tapered down to the trailing edge of the barrel, the barrel having a fuel passage way defined therein extending from a tapering slot in the circumferential edge of the barrel to an opening adjacent said trailing edge of the barrel, which opening always communicates with said passage extending through said body and said barrel in all operative positions of the barrel, the tapering slot being adjacent a hole extending through the body and leading to a fuel control valve so that movement of the barrel alters the cross section of said tapering slot presented to said hole to meter the quantity of fuel to be passed through said tapering slot.