Abstract: A vacuum pump, having a pumping chamber with intake and exhaust ports communicating therewith, is provided with an arrangement to insert a liquid lubricant into the pumping chamber. A sensing device is utilized to detect the pressure at the exhaust port, the sensing device permitting operation of a deactivating unit when the pressure at the exhaust port falls below a predetermined value, pressure below the predetermined value being indicative of improper pumping action in the pump. The deactivating unit acts to render inoperative the lubricant introducing arrangement when the sensing device detects a pressure at the exhaust port below the predetermined value, thus precluding the insertion of lubricant into the pumping chamber upon the occurrence of defective pumping action in the vacuum pump.

Abstract: A helical screw air compressor unit has a rotary capacity control valve, a compressor inlet throttling valve, and a pressure relief valve for venting the compressor discharge conduit. A control circuit senses pressure in the compressed air supply system downstream of the compressor and operates the capacity control valve, inlet throttling valve, and pressure relief valve in a predetermined sequence to provide an improved power consumption characteristic for variable demand compressor applications. The control circuit includes a hydraulic control valve and an actuator for operating the rotary capacity control valve to regulate compressor throughput to maintain a predetermined pressure without overpressuring the supply system during operation at conditions of reduced demand for compressed air.

Abstract: A centrally disposed vent is positioned adjacent the low pressure region of recirculating gases in a combustor or augmentor of the type used in gas turbine engines, allowing gas to be abstracted from the core of the recirculating region, thereby causing a reduction in static pressure, and a strengthening and stabilizing of the recirculating flow pattern. Combustion occurring in the recirculating gas is intensified by virtue of higher mixing rates, and flame stability is enhanced by virtue of increased stability of the recirculating flow pattern. The vent is shown employed in a premixing tube device for use in gas turbine engine main combustors. Alternative main combustor and augmentor combustor configurations are shown.

Abstract: An inshot, atmospheric burner assembly is provided for hot air furnaces including a frame supporting a venturi assembly, an adjustable secondary air shutter and a circular target or flame spreader. The flame spreader is positioned adjacent the outlet of the venturi assembly. An orifice holder extends through the base of the frame and adjustably carries a primary air shutter.

Abstract: A demister assembly is provided for removing and reclaiming liquids from gases, and particularly engine lubricating oil aerosols from leakage air in gas turbine engines. When in series connection to an air vent line from a gas turbine engine, the demister strips out oil from the air before it is vented overboard while producing a moderate noise reduction and imposing only slightly higher back pressure on the system.By increasing in number selected demister components, the noise reduction can be significantly increased with minimal increase in back pressure, combining a silencer function with the demister function.

Abstract: A well pumping apparatus including a plurality of hoses windable on a reel journalled by a base having an elongated submersible pump assembly connected with one end of the hoses for lowering and raising the pump assembly into and out of the well. An engine, mounted on the base, drives the reel and a hydraulic pump connected with a pair of the hoses for operating a hydraulic motor and driving a submersed pump contained by the pump assembly and generating a pumping action of the well fluid through one of the hoses. A thrust support and motor mount, connected with the respective end portions of the pump assembly respectively, support an elongated fluid pump drive shaft contained by the pump assembly and provides a fluid port for fluid trapped around the pump drive shaft adjacent the hydraulic motor.

Abstract: Apparatus for an improved diaphragm pump wherein hydraulic shock and mechanical wear to the diaphragm membrane is reduced by providing a circular reed valve member adjacent to the diaphragm. The reed valve member provides a barrier to pressurized hydraulic fluid jets from direct impingement upon the diaphragm membrane, and provides a valve closure member for reducing hydraulic shock effects on the diaphragm membrane.

Abstract: In one form of the invention, a rotatable and axially slidable plunger mounted within a fixed cylindrical plunger barrel forms with the barrel the casing bore and a spring biased electromagnetically driven axially slidable cut off sleeve, a dash pot chamber including a narrow radial gap between the cut off barrel and the pump casing body. The high pressure cut-off fuel may be directed to the chamber. Alternatively, the cut-off fuel may be directed to impact a deflector to produce an axial force modulating axial shift of the sleeve.

Abstract: An axial flow fan wherein the cylindrical housings for the shanks of blades are mounted on a flat plate-like circular base of the hub which is rotated by an electric motor through the medium of a belt transmission and a hollow shaft. The motor, transmission and shaft are mounted at one side and the housings are mounted at the other side of the base.

Abstract: An engine which includes a combustion chamber and a work function chamber enclosing the combustion chamber. A burner means is located in the combustion chamber for combustion. A rotatable turbine wheel is further mounted in an inlet of the work function chamber with one side of the blades in communication with the ambient atmosphere and the other side in communication with the interior of the work function chamber. The products of combustion are rapidly cooled and continuously removed from the combustion chamber by an exhaust means of the venturi type. This serves to create a pressure differential and provide a continuous stream of high velocity airflow against and through the blades of the turbine, through the work function chamber and out through the exhaust means. In this manner, a rapid rotative movement is provided for the turbine wheel and power output is taken from it and from the output shaft on which it is mounted.

Abstract: A material dispensing and metering piston pump comprising, in combination, a piston cylinder, an inlet defined in said cylinder for material to be dispensed, and an outlet defined in said cylinder for the said material, the inlet and the outlet being axially spaced from one another, and a piston comprising a piston rod and a piston head, the piston head comprising a member having a peripheral skirt outwardly and forwardly projecting therefrom, said member having one or more apertures extending there-through, there being a sealing member mounted on said piston rod, said member and said sealing member being movable relative to one another, said sealing member acting to seal said apertures when said member with said peripheral skirt and said sealing member are in one relative terminal position, the arrangement being such that the member and sealing member co-operate to seal said apertures when the piston head assembly moves material towards said outlet and to open said apertures when the piston head is withdrawn

Abstract: A pneumatic pump adapted primarily as a left ventricular heart assist device includes a flexible bladder with a rigid housing. A pneumatic driver applies rhymical pulses between the bladder and the housing to repetitively collapse the bladder and establish a pumping action through the bladder, in conjunction with check valves in the inlet and outlet to the bladder. Between the driver and the pump there is provided a pneumatic pulse limiter which includes a flexible diaphragm isolating the driver from the pump. Pulses from the driver are transmitted to the pump only through the flexible diaphragm and the diaphragm is constrained to move only within established limits. Regardless of the magnitude of the pulse from the driver, the maximum pulse applied to the pump cannot exceed that corresponding to the maximum displacement of the diaphragm.Between successive pulses, the portion of the system between the driver and the flexible diaphragm is depressurized.

Abstract: The fuel channel leading from the pressure chamber of a fuel injection pump to the injection nozzles includes a volume containing a valve spring and formed by a cap threadedly engaging the valve body. This cap also provides an axial force which clamps internal elements of the valve mechanism into firm and sealing contact. An elastic insert, whose contours are similar to those of the cap, is located within the cap. This insert deforms under the force of the threaded cap and provides an elastic force reservoir which maintains the clamping and sealing force even when the cap is slightly loosened.

Abstract: The invention concerns a novel adjustable roller pump assembly of the type comprising a semi-circular plate against the inner surface of which a flexible tube is located and a pair of diametrically arranged cylindrical rollers mounted on a driven rotatable body. The invention is related to a special means for adjusting the distance between the axes of the rollers so that the degree which the rollers compress the flexible tube can be adjusted. This means comprises an adjustment shaft rotatable about an axis transverse of the axis of rotation of the rotatable body and having at its ends cylindrical locating elements eccentric to the axis of rotation of the adjustment shaft, said locating elements acting on arms on which rollers are mounted so that adjustment of the adjustment shaft displaces the arms and hence the rollers.

Abstract: In a double-acting rotary compressor having two compression spaces each constituted by at least one variable-volume compression chamber which is put into communication first with the suction enclosure and then with the discharge enclosure, the power consumption at low delivery is reduced by causing the two compression spaces to discharge in parallel into a common duct in the vicinity of maximum delivery and connecting the spaces in series for deliveries below a predetermined value by joining the outlet of the first space to the second space at a point at which the compression chamber is already isolated from the suction enclosure.

Abstract: An improved motor mount assembly for fan motors includes a plurality of flexible cables connecting the end plates of the motor housing with a mounting bracket. The motor mount assembly may be used in combination with a bladed fan or a blower wheel fan. The cables retain the blower motor in proper position while providing sufficient flexibility to damp out vibrations which occur due to the operation of the fan motor. A combination sheet metal air discharge grill and fan motor mount assembly is also disclosed.

Abstract: A camping stove having a housing for receiving an expendable gas container. The gas container is punctuated by a puncturing means at the upper inner end of the housing to connect the container with valve supporting the puncturing means. The valve means and the puncturing means are rotationally and stationarily mounted in the housing. The container is enclosed in the housing by a lid which supports a screw employed to press the container against the puncturing means without rotating the gas container.

Abstract: An electromagnetically driven pump having a rotor unit comprising a motor armature integral with a pump impeller and supporting bearing means mounting the rotor unit for rotation and limiting axial movement of the rotor unit in one axial direction and additional means for limiting movement of the rotor unit in an opposite axial direction.

Abstract: A pressure fluid engine of single acting cylinder type has a directional control valve and a master valve with a spool and two valve seats. The spool is formed on a piston rod extending from a piston in the cylinder, the rod passing through a cylindrical disc of the directional control valve. One of the valve seats is provided in the disc to unseal the pilot operating fluid when it cooperates with the spool at a dead point. Another valve seat for the spool is provided in one of the valve chambers of the directional control valve to unseal the pilot operating fluid when it cooperates with the spool at the other dead point. The directional control valve is actuated by means of directional control of a pilot operating fluid with the master valve, in order to reverse the direction of the piston when the piston reaches one of the dead points.

Abstract: To decrease nitrogen oxide formation the exhaust gases of an external combustion engine are recirculated, thus reducing maximum combustion temperature. The static pressure of the combustion air flow is maintained substantially constant and independent of the magnitude of combustion air flow. Fuel is regulated in proportion to the supply of combustion air.