Abstract: A carburetor improvement inhibits tampering with an idle adjustment screw after an initial adjustment of the screw is made. The screw is inserted in a cavity formed in the carburetor body and a plug is placed in the open outer end of the cavity. Further, a blocking pin is inserted transversely through the cavity between the plug and the adjustment screw.

Abstract: A carburetor improvement inhibits tampering with an idle adjustment screw after an initial adjustment of the screw is made. The improvement comprises a cover attachable to the carburetor which prevents access to the idle adjustment screw.

Abstract: A carburetor for an internal combustion engine has an idle adjust screw. A cover is provided for encompassing the idle adjust screw so as to prevent any readjustment of the idle adjust screw by an operator. The cover is not removable once the carburetor is mounted on the intake pipe so that carburetor settings can be maintained. The cover may be formed with a slot of special configuration so that adjustment may be made only with a specially designed tool.

Abstract: A carburetor idle speed set screw is enclosed by an assembly that prevents access to the screw so long as the assembly is in place, and, therefore, prevents adjustment of the set screw; the assembly includes a lower cup-shaped base member nested with an inverted cup-shaped cap having resilient fingers insertable within the lower member and held therein in a spring-lock detent-like manner by mating beads or dimples.

Abstract: The rotary drum humidifier is mounted in an opening in the horizontal supply duct of a forced warm air furnace. The humidifier has a built-in manual humidity control wherein an adjustable thermostat is connected in series in the electrical humidifier motor circuit. The thermostat completes the electrical circuit on rising temperature in the duct and senses the peaks and valleys of the modulating duct temperature caused by the furnace heating cycle. When the control knob of the thermostat is set on "high", the humidifier will operate at a greater percentage of the furnace heating cycle and when set on "low" the humidifier will operate at a lesser percentage of the furnace heating cycle.

Abstract: A device for supplying fuel to an internal combustion engine comprises a shell, a tube received in the shell and a rod received in the tube with a sliding fit. A plurality of orifices in the tube at intervals along at least a portion of the length of the tube is provided. The rod is insertable in the tube to an extent sufficient to block the orifices and retractable to an extent sufficient to leave the orifices unobstructed. The number of orifices left unobstructed increases in proportion to the extent to which the rod is retracted. The rod includes means for connection to a linkage from a motor vehicle throttle for effecting axial movement of the rod. An annular space is defined between the exterior wall of the portion of the length of the tube having orifices and the portion of the length of the interior wall of the shell facing the orifices. Also provided are means defining passages for admitting liquid fuel into the annular space.

Abstract: A carburetor having a fuel bowl, main fuel metering system means and idle fuel metering system means is shown provided with a valve assembly actuatable into either an open or closed condition; in the open position additional fuel from the fuel bowl is bypassed around the main metering restriction as to flow into the main fuel metering system means downstream of such main metering restriction and in the closed position all fuel flowing into the main fuel metering system means flows through the main metering restriction.

Abstract: A fuel mixture charge device for communication with the inlet of a combustion chamber including a conduit having inlet and outlet ends, the outlet end being adapted for connection in fluid communication with the combustion chamber and the inlet end communicating with ambient air, a one-way valve in the inlet end of the conduit for passing air only into the conduit, and resilient means operative to urge the valve closed and permit opening under internal pressure reduction for passing air to an engine according to its needs.

Abstract: A fuel metering apparatus, for supplying metered fuel to an associated combustion engine, has an idle fuel metering and supply system comprising adjustable valving means which, in turn, comprises a discharge orifice means and cooperating valving member which is adjustably selectively positioned with respect to such orifice means in order to thereby establish a desired metered rate of fuel flow through the thusly determined effective flow area of the orifice means for a particular pressure differential thereacross; the adjustable valving member is generally contained within a cooperating body member or portion and access to the valving member, subsequent to it being selectively positioned, is prevented by closure members placed in position after the said selective positioning of said valving member.

Abstract: Changing the jets of a Holley carburetor is greatly simplified by an L-shaped adapter which permits the jets to face upward. The jets are removed through access holes drilled in the upper wall of the float bowl by a special screwdriver/gripping tool.

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 checking and adjusting apparatus for the carburetor of an internal combustion engine such as an automobile or other vehicle, and wherein there is provided a warning signal on the dashboard of the vehicle that will be actuated when the carburetor is out of adjustment. In addition there is provided a hand controlled device for adjusting the carburetor from the dashboard of the vehicle.

Abstract: Portable apparatus is used for dispensing of urea formaldehyde foam for use as a sound and heat insulator. The apparatus includes a framework having mounted therein three valves which are simultaneously actuated by a single handle lever. One valve dispenses air to a connection downstream of another of the valves which dispenses a mixture of water, detergent, and resin hardener while the third valve controls the flow of urea formaldehyde resin. The air and water-detergent mixture are combined in a frothing chamber and together they are conveyed in foamed condition to a mixing chamber. The resin is sprayed into the mixing chamber to combine with the froth and the resulting mixture is propelled into a cavity which will house the insulation.

Abstract: The position of a fuel nozzle of a variable size venturi carburetor is adjustable with respect to the venturi orifice in dependence on climatic conditions such as an ambient temperature and/or atmospheric pressure. An additional air delivery passageway controllable by an electronic air/fuel ratio control system in dependence on an exhaust gas sensor signal is connected with the fuel nozzle.

Abstract: A carburetor has a manually adjustable control to simultaneously change fuel flow rates from the power valve and accelerator pump circuits to compensate for altitude changes varying the air density and thereby the air/fuel ratio of the mixture flowing from the carburetor.

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.

Abstract: An improved apparatus for feeding fuel to an internal combustion engine, said apparatus comprising a multiplicity of fuel sources that cooperate with a spill chamber that is surrounded by an overflow trough. Cooperation is by means of a feed line having an on-off valve along its length. The spill chamber feeds fuel to a fuel/air mixer that cooperates with the engine. The improvement comprises (i) a structural relationship between feed line, on-off valve and fuel flow in that the on-off valve is positiond in the feed line so that fuel is forced in a direction generally away from gravity immediately before and after passing through the valve and (ii) the feed line is fixedly positioned to direct fuel into the chamber when the valve is "on" and into the trough when the valve is "off". The invention also concerns an apparatus for measuring fuel octane numbers that incorporates the feeding apparatus just described.

Abstract: In a carburetor having a fuel metering rod longitudinally movable through a fuel supply orifice with a lower end laterally movable to a limited degree, a positioning link connected to the lower end positions the metering rod according to fuel demand. An adjusting lever is pivotable with respect to the housing and includes an adjusting screw to set its position. An adjusting link connecting the adjusting lever to the lower end of the metering rod causes the position of the metering rod to be changed independently of fuel demand according to the position of the adjusting screw and lever.

Abstract: An apparatus for filtering, washing and cooling gases including a chamber having inlet ducting and outlet ducting. Gases conducted through the inlet ducting into the chamber are cleaned and cooled therein and removed through the outlet ducting. Within the chamber is a convoluted foraminous wall extending transverse to the direction of gas flow to maximize the area where water droplets will impinge and vaporize. Some means such as a fan is used to force the gas through the foraminous wall. A pool of water stands in the bottom of the chamber between the inlet ducting and foraminous wall and a curtain of said water is sprayed from said pool by means of rotating discs and directional control mechanisms, whereby gas entering the chamber passes through the water curtain and is cleaned and cooled.