Abstract: The invention relates to variable guide vane arrangements for axial flow compressors of aircraft gas turbine engines. The variable guide vane arrangement comprises a plurality of stator vanes rotatably mounted in a stator structure of the compressor. A control ring surrounds and is normally coaxially with the compressor axis, and a plurality of operating levers extend from the control ring to their respective stator vane. The control ring is movable laterally with respect to the axis of the compressor so that the stator vanes in a first half of the compressor are rotated in one direction so that the first half of the compressor operates at a higher pressure ratio and the stator vanes in a second half of the compressor are rotated in the opposite direction so that the second half of the compressor operates at a lower pressure ratio.

Abstract: A displacement device is arranged at an input section of a stuffing apparatus for stuffing at least one insert into folded printed products. The displacement device mutually displaces relative to one another two main printed products which have been infed in superposed or mutually reposing relationship upon one another in a predeterminate product conveying direction before these two main printed products are engaged by a transport device and further delivered to an infeed section of the stuffing apparatus. For this purpose, one printed product is fixedly retained by a clamping element controlled by a cam whereas the other printed product is displaced by a displacement or slide element in the product conveying direction. The displacement or slide element is actuated by a drive arrangement comprising an entrainment lever upon which acts a stop or abutment of the transport device during its return motion.

Abstract: An end cap for a fluid cylinder having a central body portion and opposite end portions, flexible annular lips on the opposite end portions, an annular barb on one of the end portions for mating engagement with a groove with a cylinder for retaining the end cap in position, and an enlarged protuberance on the other annular portion of a diameter greater than the internal diameter of the cylinder for providing an interference fit therewith.

Abstract: A fluid-heating solar collector comprises a solar energy absorber with heat conducting and radiation absorbing material arranged to provide a plurality of angularly bent conduits extending therethrough thus to optimize the heat absorption surface at differing sun angles and also to substantially increase the area for convective heat transfer to passing air or other fluid.

Abstract: Abradable coatings are applied to turbine or compressor shroud structures to facilitate reductions in blade tip-to-shroud clearances for improved engine performance or airfoil durability. Coating compositions include a chemically table, soft, burnishable ceramic material (such as CaF.sub.2 or BaF.sub.2) in a ceramic or metallic matrix or honeycomb structure.

Abstract: A hydraulic actuator having redundant cylinder assemblies, each assembly ng of lightweight and economical construction in having a relatively thin tubular wall reinforced to withstand hydraulic pressure by a layer of resin reinforced filament, the thickness and the material of the wall being such that petals formed from the wall by projectile penetration are sheared by engagement with a piston of the assembly as this piston is moved, together with an actuated element, by the piston of the other assembly.

Abstract: A turbocharger turbine housing particulate debris trap for collecting all unwanted exhaust gas entrained particles before engagement with the turbine wheel. The trap can be located anywhere in the exhaust system upstream of the turbine wheel and is designed to take advantage of both inertial and gravitational forces. Systems for purging the trap of collected debris is also disclosed.

Abstract: An immersion tube dipping into a fluid is connected via a valve and via a 3/2-valve to a condensate line and to a working line. In the sterilization position, vapor flows through the valve and through the 3/2-way valve and the valve is in a position which is open to the head space of the vessel and to the tube. As a result, all of the inner space of the vessel is exposed to the same pressure. In the operating position, the valve connects the duct only to the interior of the immersion tube, while the connection to the head space is blocked. All components connected to the line are sterilized by vapor.

Abstract: This invention relates to a device for controlling and synchronizing the guide vanes of a distributor of hydraulic machines, particulalry of turbines, which comprises ramps borne by spaced apart radial tabs secured with the synchronization ring. Each lever fitted angularly on the journal of each guide vane presents a free end which cooperates with the corresponding ramp by a roller. The profile of the guide vanes is such that the hydrodynamic force tend to close them.

Abstract: A hydraulic master and slave cylinder assembly of the type in which a piston is positioned in the master cylinder, a piston rod is connected to the piston and extends out of the input end of the master cylinder, a piston is positioned in the slave cylinder, a piston rod is connected to the slave cylinder piston and extends out of the output end of the slave cylinder, a first conduit extends between the output end of the master cylinder and the input end of the slave cylinder, and a second conduit extends between the input end of the master cylinder and the output end of the slave cylinder.

Abstract: An improved fan of the centrifugal type for bathrooms and the like has a housing with a base wall and four depending side walls. An exhaust outlet fitting in one of the walls has an integral centrifugal fan outlet cutoff. A venturi plate, positioned within the side walls and parallel but spaced from the base wall contains an inlet opening for the fan. The portion of the plate surrounding the opening is formed as a venturi. The inlet opening is spanned by a strut means to support the motor driving the centrifugal impeller. The struts have a generally T-shaped configuration so as to be removed from the portion of the opening adjacent the exhaust outlet fitting, thereby to enhance the efficiency of the fan. The base wall and one of the sidewalls contains reinforced holes for receiving the wiring. A flap in the housing covers the one of the holes not used for wiring connection purposes.

Abstract: A one moving part, bi-directional rotary displacement mechanism for conveying rotational movement about an axis to movable members in flight vehicles. In consists of an enclosure having bi-directional rotation capability, encapsulating a vane with bi-directional ducts venting from its load bearing surfaces. The vane is affixed to a bi-directionally ducted shaft, having bi-direcitonal rotation capability, extending through the center and outside of the enclosure. A conically shaped, sealed, positive stop, with load bearing surfaces, eminating from the inside radius of the housing, points toward the horizontal axis, supports the shaft and facilitates axial rotation. The vane has a radius concentric with the inside radius of the enclosure and allows sealed bi-directional rotary movement between the two surfaces. Two sealed cavities exist between the load bearing surfaces of the vane and the positive stop. Pressure to and from the cavities flows through the joined vane and shaft ducting.

Abstract: A diaphragm for pumps or the like of a dish-shaped body of nonreinforced thermoplastic elastomer having a curvilinear flexure sidewall portion of substantially less thickness than the central and flange portions to which it connects.

Abstract: A solid fuel burning space heating appliance comprises a combustion chamber including front, side and rear walls, a top and a bottom. An apertured grate arrangement is provided in the combustion chamber for supporting solid fuel. An ash collecting region is located under the grate arrangement, with an air inlet for providing combustion air. A first air outlet in the combustion chamber is located below the grate arrangement, and a second air outlet in the combustion chamber is located above the grate arrangement. An air diverting arrangement is provided for selectively diverting air from the air inlet between the first and second air outlets. A glass cleaning system provides a vertical curtain of air over the interior surface of a glass panel. The glass cleaning system includes an air supply adjacent one side wall, an air reservoir connected to the air supply and a dam defining a tapered outlet slot for providing the curtain of air from the air reservoir.

Abstract: A control device for a hydrostatic drive for at least two actuators having a variable displacement pump whose adjusting device can be acted on as a function of the displacement and/or of the delivery pressure, wherein a control valve is associated with each actuator in its hydraulic supply line and the delivery flow for each actuator is determined by means of a pressure compensator as a function of the valve preset at the control valve, is simplified while ensuring accurate control. This is achieved by having the adjusting device always set the pump at a displacement which is slightly less than the sum of the actual instantaneous volume flows required by the actuators.

Abstract: A multi-stage centrifugal pump mainly used for oil extraction, which incls two essential components, namely, a rotational impeller comprising several blades and a stationary diffuser. The shapes of blades and flow passages are designed by using three-dimensional flow theory. The configuration is characterized by the impeller length and the diffuser length being almost equal, with the moving blade being provided with an extension at the trailing edge, smaller wrap angle of the stationary diffuser blade, shorter single-stage and smaller outside diameter, and so forth.

Abstract: A fail safe drive circuit for enabling the relay which in turn opens the valve for supplying gas to a burner is disclosed and includes a pair of field effect transistors both of which must be operating properly to enable the relay. One transistor receives an enabling input from a rectifier circuit and will be enabled only if the alternating input signal is of sufficient magnitude and repetition rate. The other transistor is turned on and off by the alternating input signal and the gas valve will be turned on only when each of the transistors is operating in its intended mode. The circuit thus discriminates against false enabling signals such as a direct current signal, line voltage signal, a non-repetitive alternating current signal, or other spurious signal.

Abstract: A device for irrigating the teeth and bucal tissues comprises a flexible laminar adaptor for placement between the lips and teeth. The adaptor is provided with irrigation nozzles connected to a water supply, and an outlet connected to a drain. The entire mouth is irrigated, as the teeth are not enclosed.

Abstract: Disclosed is a burner for the partial combustion of a solid carbonaceous fuel wherein coal, e.g., finely divided coal, is supplied to a reactor space via a central channel disposed along the longitudinal axis of the burner, and oxygen-containing gas is supplied via two annular channels surrounding said central channel, and heat from the combustion is removed from the hollow front face of the burner by coolant flowed through said front face spirally about the longitudinal axis of the burner.

Abstract: A plastic blower including a clam shell housing. The clam shell members of the housing are sealed together by means of a groove in the edge of one of the clam shell members and a tongue formed on the edge of the other clam shell member. A strip of flexible sealing material is disposed in the groove and is compressed therein by engagement with the protruding tongue. The spaced between the tongue and the walls of the groove converges toward the open end of the groove, whereby an increase or decrease of pressure within the housing relative to the ambient pressure causes the sealing strip to be further wedged into the space, thereby increasing the effectiveness of the seal.