Abstract: A composite compressor wheel for turbochargers and the like comprises a cast shell having aerodynamically contoured centrifugal impeller blades and a hub section defining a generally conical recess into which a hub insert of noncast material resistant to stress failure is secured as by inertia welding. In use of the composite wheel, the hub insert substantially occupies high stress regions within the wheel to improve wheel fatigue life.

Abstract: An improved steam turbine system is provided having a hardfacing disposed on a portion of its steam inlet chamber wear surfaces. The invention also includes a novel stacked ring design having a hardfaced inlet sleeve and stationary, nitride sealing rings for minimizing wear. Also included are novel heat treatments and metallurgical processes for stress relieving these hardfaced components. The techniques and designs employed, decrease steam leakage and assure longer service life for steam powered turbines.

Abstract: Existing steam chests having a plurality of valves which are incapable of operation by individual high pressure valve actuators may be modified to provide apparatus for transferring operation of a steam turbine at less than a full load betweeen a full-arc admission mode and a partial-arc admission mode. For those steam chests of the internal bar lift type, the outboard valves are disconnected from the bar and coupled directly to respective servomotors. As such, the pre-existing servomotor utilized to lift the internal bar, as well as the additional servomotors for the outboard valves, are operatively connected to a conventional control means. In those steam chests of the external bar lift type, an additional servomotor is coupled through an actuator rod to the pre-existing pivot point of the external bar, and is thereafter controlled by conventional means for interactively activating the pre-existing servomotor and the additional servomotor.

Abstract: A method and apparatus for eliminating vortex whistle noise in a radial-to-axial compressor intake uses a plurality of flow fences (36) disposed along the radially inner gas passage boundary (10). The fences (36) disrupt a portion of the swirling gas flow (32) resulting from the position of a plurality of pivotal inlet guide vanes (28) disposed about the radially outward facing inlet (18).

Abstract: A game table is disclosed which comprises a playing surface surrounded by a cushion. The shape of the table is such that certain cushions cannot be joined to other cushions by a line which crosses the playing surface and which is straight. The configuration is such that there are areas of the playing surface which can only be joined by a line extending across the playing surface if the line is curved. Thus a ball cannot roll between these areas without rebounding-off a cushion unless it is struck skew to impart spin to it.

Abstract: A propeller having blades designed to achieve maximum thrust at lower static velocities in both forward and reverse pitch modes is disclosed. Each blade has a generous leading edge radius leading to an upper surface having positive camber and a lower surface having positive camber adjacent the leading edge and negative camber adjacent the trailing edge. Each blade also has a high thickness-to-chord ratio and lower span-to-chord ratio or aspect ratio. This thicker blade profile and aft loading leads to a more uniform pressure distribution and laminar airflow across the blade surface resulting in a higher coefficient of lift, increased blade life and reliability, and lower noise levels.

Abstract: In a centrifugal machine for a refrigeration or air conditioning system and including a casing, an impeller, a variable width diffuser assembly leading from the impeller, and a plurality of vanes received through respective complementary-shaped openings in a movable wall member, there is provided a sealing means in the openings between the vanes and movable wall member for preventing leakage of fluid through the openings, thereby increasing the operating efficiency of the machine.

Abstract: A centrifugal slurry pump casing which reduces localized wear behind the cutwater caused when the pump operates at less than the best efficiency point flow rate. By reducing the throat area (13) of the casing (12) in the region of the cutwater (14) to 30-70% of the discharge neck (17) at the discharge flange (18), recirculation and vortexing due to slurry re-entering the volute is substantially reduced.

Abstract: A multistage in-line rotary pump which comprises a closed pump body, a base element provided with suction and delivery connectors, and a head element. The pump body is surrounded by a cylindrical jacket or casing spaced from the pump body to form an annular return space, which casing is clamped between the base and head elements by means of stay bolts. Flat joints are provided between the base and head elements and the respective axial ends of the casing. To prevent high areal compression stresses in the area of the flat joints, the two extremities of the casing are plastically deformed to obtain a wall thickness which is greater than the wall thickness of the rest of the casing tube.

Abstract: A fluid pump has an impeller rotatably mounted within the pump chamber, an inlet flow guide directs incoming fluid to the impeller vanes and an outlet flow guide between the impeller and the outlet of the pump chamber completes the change of the direction of the fluid moved through the pump from substantially coaxial with the rotation of the impeller to substantially tangential to the impeller axis.

Abstract: A submersible centrifugal pump has a downward thrust washer of reduced diameter. The pump has a housing containing a plurality of stages of impellers and diffusers. Each impeller is rotated by a shaft for discharging fluid upward and outward into an intake of a diffuser. A counterbore is formed in the upper end of a bore that passes axially through the diffuser. An upward facing shoulder is located at the lower end of the counterbore. A thrust washer is located on the shoulder. An extension sleeve extends downward from the hub of each impeller into the counterbore of the diffuser of a next lower stage. Downward thrust on the impeller is transmitted through the extension sleeve to the thrust washer.

Abstract: An improvement in an inducer for a pump wherein the inducer includes a hub, a plurality of radially extending substantially helical blades and a wall member extending about and encompassing an outer periphery of the blades. The improvement comprises forming adjacent pairs of blades and the hub to provide a substantially rectangular cross-sectional flow area which cross-sectional flow area decreases from the inlet end of the inducer to a discharge end of the inducer, resulting in increased inducer efficiency improved suction performance, reduced susceptibility to cavitation, reduced susceptibility to hub separation and reduced fabrication costs.

Abstract: The shafts of guide vanes of an axial-flow engine, in particular, a combustion turbine, are supported angle-adjustably in an annular guide vane carrier and are spring-loaded and vibration-damped in their axis directions. An adjustment ring concentric to the flow channel is supported play-free and with low-friction engagement in a groove of a carrier ring by radial and axial rolls. Levers wedged on the guide vane shafts are pivoted by pins in a cylinder bolt, which, in turn, are supported rotatably and displaceably in laterally open bores of the adjustment ring and axis-parallel to it. This permits a largely play-free transfer of the adjustment motion onto the guide vane shafts without point or line contact. The guide vane carrier closes off the groove of the carrier ring so, that the entire mechanism is protected against dust.

Abstract: A mounting arrangement for an axial fan, wherein the axial fan is used for moving air through a cabinet or enclosure for heat generating electrical components. The axial fan is housed in a cylindrical housing having a flange and air inlet at one end and a flange and air outlet at the other end. The mounting arrangement also includes a support having a base with an air opening and two parallel walls. The parallel walls including catches for attaching the housing to the support. The support is mounted in an enclosure or formed as an integral part of the enclosure.

Abstract: A self-locking retention system is provided for a composite rotor blade supported on a rotor hub. A radially extending, stud-like retention member is provided on the rotor hub. A composite thickness projects radially inwardly from the rotor blade and substantially surrounds the retention member. The composite thickness is woven in a pattern which grips the retention member in response to outward forces applied to the rotor blade and the woven composite thickness.

Abstract: The present invention provides a vortex-free shrouded inducer assembly comprising a forwardly extended shroud (24) and surfaces (36,38) defining a recess proximate to the forward lip (42) of the shroud for favorably diffusing and mixing the flow (54) tending to recirculate about the outer periphery (30) of the inducer prior to its being discharged through nozzle (40).

Abstract: An inner shroud for a gas turbine engine is described comprising six approximately equiangular segments each segment adapted to securely contain a plurality of vane stems. The segments comprise interlocking first and second sections forming a channel having an aperture suitably sized to securely contain the vane stem. The sections when fit together form an outer recess area suitably sized to substantially accommodate the button portion of the vane stem and an inner cavity suitably sized to accommodate the inner portion of the vane stem. This results in reduced shroud curling when used in a split case compressor.

Abstract: A blade has a plurality of relatively thick, super critical airfoil sections, each section having a parabolic leading edge, with a slight camber extending to about a 40% chord, a gradual upper surface pressure recovery region from the 40% chord to the trailing edge, and a concave lower surface from the 40% chord to the trailing edge to generate required lift. The sections, which have a thickness ratio from about 2% to 7.5%, each have a maximum thickness at approximately 0.36 x/c and a maximum camber at approximately 0.74 x/c, wherein x/c is a dimensionless length along the chord of each of said airfoil sections.

Abstract: An axial flow elastic fluid turbine has a vibration inhibitor for the inlet sleeves which extend through a motive fluid flow area between the inner and outer cylindrical casings of the turbine. The vibration inhibitor comprises a flexible support, preferably in the form of a metal plate, that is secured to, and extends between, adjacent inlet sleeves in the motive fluid flow area between the inner and outer cylindrical casings, and the plates have at least one bend therein in the direction of the radius of the casings to permit flexibility thereof.

Abstract: A throwing game consisting of a shuttlecock-like throwing body having a suction cup on its top and a catch plate having a cambered front side and a holding loop on its rear side. The holding loop is insertable and fixable in a clamping device on the rear side. The holding loop is provided with a series of spaced nubs, which allow the size of the loop to be adjusted.