Abstract: An assembly for mounting a plurality of circumferentially spaced and radially extending airfoils. In a preferred embodiment the assembly comprises a plurality of arcuate mounting fairings each including a central boss having at least one radially extending recess disposed in a radially inner surface thereof which contains an elastomeric boot for receiving an end of one of the plurality of airfoils. The mounting fairing further includes integral first and second flanges extending circumferentially outwardly from opposite sides of the boss portion which overlap complementary second and first flanges, respectively, of adjacent mounting fairings. Fastening means connect the first and second flanges of adjacent mounting fairings to form a continuous annular shroud.

Abstract: Pneumatic starters including a housing formed in sections interfit in telescopic and abutted relation, a cap forming its upstream end, a nozzle unit at the open end of said cap defining therewith a shallow chamber constructed to receive a flow of fluid under pressure to power said rotor and provide for its content a substantial pressure head, said end cap and nozzle unit being coaxially extended by a turbine assembly section, the rotor of which positions outwardly of the end thereof immediately adjacent said nozzle unit, positioning its buckets in coaxially aligned relation to its nozzles, said rotor nesting in a relatively axially extended portion of a cylindrical wall structure which forms a shroud for said nozzle unit, lines the inner wall of said housing and peripherally shrouds the buckets of said rotor, said nozzle unit being separable and interchangeable, said inlet chamber and required interrelation of the nozzles of said nozzle unit and the buckets of said rotor being achieved in assembly of said hou

Abstract: The present invention provides a pump arrangement formed with a plastic pump housing and a motor housing secured to one another. A heat transfer member extends between the housings for picking up heat generated in the pump chamber of the plastic pump housing and transferring the heat for dissipation internally of the motor housing.

Abstract: A blade is comprised of a plurality of a family of airfoil sections, each section being characterized by a large leading edge radii, a camber having an apogee at approximately 45% of the airfoil section chord length and relatively blunt trailing edge. The airfoil sections taper in thickness ratio (h/b) from about 20% near the blade root to about 2% near the blade tip. The maximum thickness for each airfoil section increases along the chord length from about 39% of the airfoil section for a 20% airfoil section to about 42% of the airfoil section chord length of a 2% airfoil section. As such, the novel blade of the invention provides superior aerodynamic performance to the NACA Series 16 airfoil in the Mach 0.50 to 0.70 range with less susceptibility to foreign object damage and handling problems.

Abstract: A variable capacity centrifugal pump capable of directly varying capacity, r output, in response to existing back pressure. The pump comprises a axially movable shroud having female grooves in fluid tight communication with male impeller vanes. The shroud has a top face surface in fluid communication with a control cavity which in turn is in fluid communication with pump back pressure.

Abstract: A casing which admits the fluid medium into the range of the impeller or first impeller in a fluid flow machine, particularly in a centrifugal pump, is made of several sections which have abutting surfaces. At least one such surface has a recess forming part of a fluid flow passage, and the recess is machined into the respective surface by a material removing tool. This simplifies the making of the casing and enables the latter to optimally conform to the conditions of flow between the supply conduit and the impeller or first impeller of the machine to thus reduce noise and stray movements and enhance the efficiency of the machine.

Abstract: A high capacity centrifugal pump for the transfer of liquids is presented. The pump comprises four major components held in rigid assembly by means of screws and pins: a drive unit which includes a drive shaft, a keyway and key, an end play control collar and an impeller mounting fixture; a one piece pump housing comprising mounting legs and a large internal diameter outlet port, a circular pump chamber cavity and a shaft hole containing a lip seal and a pair of flanged sleeve bearings; a one piece impeller of a width slightly less than its diameter; an end plate encompassing a large diameter inlet port. The drive shaft and attached impeller are mounted off center in the cylindrical pump chamber to permit liquid escaping from the impeller to enter a surrounding area which closely resembles the volute chambers common to conventional single stage centrifugal pumps.

Abstract: A plurality of lubricating plugs are disposed in the stationary backup face adjacent to the axial stop face of a rotating impeller mounted in a turbopump for pumping liquid oxygen or liquid hydrogen. The stop face and the backup face are those surfaces which engage when the axial load on the impeller exceeds the load balancing capability. The plugs have a truncated conical configuration so as to be trapped in the backup face, and are disposed at varying radii on the face to provide complete surface lubrication. The plugs may be formed from Teflon, Kel-F or bronze filled Teflon.

Abstract: An action toy game apparatus includes a receiver assembly which is preferably embodied as an amusing character figure, a timer assembly which is actuatable for a set period of time, a plurality of game elements and a propelling mechanism which is operable for individually propelling the game elements at the receiver assembly. The receiver assembly is responsive to the timer assembly for oscillating between a fully open position and a partially open position when the timer assemly is in an actuated condition and for moving to a fully closed position when the timer assembly is deactuated. The game elements are receivable in the receiver assembly when they are propelled at the receiver assembly while the receiver assembly is in either the open position thereof or the partially open position thereof but not while the receiver assembly is in the closed position thereof.

Abstract: A turbo-molecular pump comprises three distinct stages corresponding to three distinct gas flow regions. The first stage comprises a plurality of stages of alternately arranged rotor blades and stator blades, and operates in a molecular flow region wherein the gas pressure is less than 10.sup.-3 torr. The second stage comprises a first helical groove formed either on the circumference of the rotor or on the circumference of the stator. The second stage is disposed downstream of the first stage and operates in a transition flow region wherein the gas pressure is from 10.sup.-3 to 1 torr. The third stage comprises second and third helical grooves formed respectively on the circumference of the rotor and stator. The third stage is disposed downstream of the second stage and operates in a viscous flow region wherein the gas pressure is greater than 1 torr.

Abstract: An improved diffuser has a first row of low solidity vanes followed by a second row of low solidity vanes. The chord of the second row of vanes is greater than the chord of the first row. The second row is located radially outward from the trailing edges of the first row and circumferentially displaced to lie in the shadow of the first vane.

Abstract: A peripheral toroidal blower has a stripper consisting of a central block part and two curved vanes projecting one from each end of the block part and extending in opposite directions around the toroidal chambers to at least partially cover the inlet and outlet ports. The active surfaces of the stripper are of porous material whereby to provide a substantial reduction in blade passing frequency noises. The active surfaces may be of inherently porous material such as polyurethane foam or of a nominally closed cell plastics foam of which the active surfaces are made porous by machining or cutting.

Abstract: A turbo-operation machine has a rotor disk (2) that rotates in a housing (1) and is surrounded by a disk diffusor. The radial length of the diffusor channel differs locally such that the static pressure at the circumference of the disk diffusor is as uniform as possible.

Abstract: A variable capacity turbo supercharger is disclosed, in which a nozzle of a turbine is a vaneless nozzle, a scroll chamber having a flow path having a circular or like sectional profile which can keep a swirling state is disposed sidewise of the nozzle, an exhaust gas inlet passage for introducing engine exhaust gas into the scroll chamber is provided with fixed swirling generation means for imparting to the exhaust gas passing through the scroll chamber a swirling whose rotational direction is such that the rotation of the gas moves away from the turbine rotor in the neighborhood of the outlet of the scroll chamber into the nozzle, and a pitch of the swirling is flexible in the direction of the flow path according to the change of the amount of the gas generated from the engine and the rotation velocity of turbine rotor so that the outside compression efficiency for the gas flow in the nozzle is variable as if the capacity of the turbine changed by itself.

Abstract: A variable-displacement turbine includes a turbine wheel, and a turbine housing accommodating a turbine wheel and having an exhaust inlet tubular member for introducing a stream of exhaust gases from an engine, top and base plates having confronting parallel annular end surfaces, respectively, concentric with the turbine wheel, the top and base plates defining a passage for supplying and guiding the stream of exhaust gases through the exhaust inlet tubular member to the turbine wheel from its outer periphery, and a vane mechanism disposed annularly in surrounding relation to the turbine wheel and between the annular end surfaces.

Abstract: The radially outer end of the aerofoil portion of each vane of a stator assembly for the fan of a turbo-jet engine is bent at right angles and is inserted in a slot-like opening provided in an outer ring which is fixed to the casing via screws in conjunction with spacers each of which has a foot which partly overlaps the adjacent opening.

Abstract: A portable bullet trap device for catching bullets fired at the device comprising a box having a bottom, a top, and front, back, and opposing sides. The front has an opening for the passage of bullets fired at the device. A plurality of vertically oriented resilient panels are provided in the box aligned with the opening in the front. The panels are spaced from each other to form spaces between the central portions of the panels through which spent bullets can fall if they cannot penetrate the next successive panel. The panels may be provided as a replaceable cell having spacers between the marginal edges of the panels. Alternatively, the panels may be separately mounted in slots in the opposing sides of the box. A target means is provided to spread shots over the panels.

Abstract: An improved open impeller for centrifugal compressors or the like that includes a hub portion and a disc portion having front and rear surfaces. A plurality of circumferentially spaced blades are positioned on the front surface of the impeller disc. A plurality of circumferentially spaced vanes are located on the rear suface of the disc and generally located between adjacent ones of the blades. The vanes are elongated and have their chords disposed at an angle relative to a radius of the circle on which the vanes are disposed to generate a pressure preventing gas exiting the blades from passing behind the rear surface of the impeller. Also, the vanes may be angled relative to the rear surface to produce a thrust counteracting the thrust produced by the impeller blades. The arrangement of the vanes is such that rigidity is provided to the impeller disc reducing the vibration of the disc when rotating at high speeds.

Abstract: A burst guard ring for stopping and retaining blade fragments thrown from a failing rotor of a turbine engine includes an outer fiber belt of a highly elastic material, preferably aramid fibers in a silicone rubber matrix surrounding the engine housing. Ceramic tiles are provided radially inwardly of the fiber belt or in the fiber belt exclusively at certain critical locations where any bulging of the fiber ring due to blade fragment impact would damage auxiliary devices or pipelines arranged adjacent or close to the engine at such critical locations. In non-critical areas the fiber belt provides sufficient protection without the ceramic tiles. The high energy absorbing protective effect of elastic fibers is advantageously combined with the low straining or expansion of ceramic, so that a low total weight is achieved.

Abstract: A low impedance safety guard for an air circulating fan with rotating fan blades which prevents a human hand, finger or foot from getting into the path of the rotating blades while yet achieving the unrestrictive air stream benefits of a relatively open guard which is generally considered unsafe. The guard comprises rear and front parallel and opposing substantially open, air stream unobstructive fan blade guard faces which will permit the hand, finger or foot to pass partially therethrough. A substantially closed circumferential wall is provided which connects the rear and front faces to enclose the fan blades approximately equal distant from the respective faces to prohibit the hand, figure or foot from reaching the blade path after passing partially through either face should a person unfortunately attempt to do so.