Abstract: A priming device for a centrifugal pump includes a charging arm which has a first end portion for insertion into a liquid to be pumped and a second end portion remote therefrom and of a selected internal diameter. A vertically disposed suction tube extends coaxially from the second end portion. The upper end portion of the suction tube has constriction which reduces the tube internal diameter to less than the internal diameter of the charging arm. A plurality of slots are in the upper end portion for creating fine gas bubbles which flow into the suction tube when the pump is operated. An outer tube is disposed about the suction tube and therewith forms an annular space in which relatively large gas bubbles may rise. The outer tube includes an upper end section secured to the suction tube upper end portion and a lower end section extending below the lower end portion of the suction tube for thereby forming a bubble separator.

Abstract: A method and apparatus for pumping liquid includes a pump casing with a vortex generating member which generates a swirling column of liquid which swirls about a central axis and which is directed through the pump inlet to discharge into the ambient body of liquid at which its energy is quickly dissipated. The surrounding ambient liquid is drawn through the pump inlet in a counterflow to the vortex column flow and flows into the pump casing and then out through a pump discharge. The preferred vortex generating member has channels of decreasing size converging toward the axis of the vortex column with the streams of liquid increasing their respective velocities as they flow toward the axis at which the streams join and concentrate their energies to form the vortex column. Preferably, the vortex member is drive by a power source.

Abstract: The invention comprises a boltless turbine nozzle and nozzle support assembly that includes a turbine nozzle mounting flange seated in a nozzle seat forming a part of the nozzle support. Pins are used for affixing the nozzle mounting flange to the nozzle support seat and baffles are provided for maintaining the pins in their desired locations. A retaining ring is preferrably used to retain the baffles adjacent to the pins. A pressure actuated pliable seal is affixed to the turbine nozzle adjacent to the nozzle seat in order to provide an air seal across the completed assembly.

Abstract: The worn tip of a turbine blade is restored by applying a metallurgically bonded wear resistant surface at the tip. The wear resistant surface is applied using a transferred plasma arc and powdered metal particles.

Abstract: A rotor for a gas turbine engine is disclosed. The rotor comprises a glass or glass ceramic matrix reinforced with silicon carbide yarn fiber reinforcement and with silicon carbide yarn reinforcement. The local volume fraction of silicon carbide monofilament increases with increasing radial distance from the inner diameter of the rotor. The rotor exhibits high hoop strength, high oxidation resistance at elevated temperatures and nonuniform elastic modulus which increases with increasing radial distance from the inner diameter of the rotor.

Abstract: The present invention is a jig or tee for supporting a football, comprising a platform having sloping edges; calls or pins projecting from the lower surface of the platform for securing the tee into the ground; and a resilient ball support arm slideably passing through an aperture in the platform.

Abstract: A rotary vacuum pump comprising a stator (1) and a rotor (2), the rotor being rotated inside the stator and the stator including a suction inlet (11) and an exhaust outlet orifice (12), wherein the suction end of the rotor carries at least one wheel (13) having sloping vanes (14) such that any solid particles that may be sucked in are projected thereby in a radial direction towards an annular stator collector tank (15) having a circular opening (16) opening out into the stator cavity (6) and situated in the plane in which said particles are projected by said vanes (14).

Abstract: A variable guide vane 12 bushing assembly 10 which features means that prevents bushing rotation. A bushing 16 comprises flats 16b on its outer sleeve, the flats interlock with race track shaped holes 20a on a tab-lock washer 20. The tab-lock washer spans two or more adjacent vane stems (12,14) and thus is not susceptible to rotation. A retainer 24 and the vane arm 26 assemble on top of the tab-lock washer to complete the assembly.

Abstract: In a side-channel compressor having a rotor rotatably supported in a housing, the improvement wherein at least one dust stripper protrudes into a gap between the housing and a rotor to prevent the accumulation of dust in the gap. Preferably, the dust stripper protrudes into a radial gap between a lateral extension of a blade ring portion of the rotor and a lateral extension of the housing. Additionally, the dust stripper is preferably circumferentially located in the inlet half of the compressor so that the pressure gradient in the compressor assists in the removal of dust stripped by the dust stripper. Additionally, or in the alternative, an axially extending dust stripper may be provided in an axial gap between the housing and a hub portion of the rotor.

Abstract: A molecular high-vacuum pump has a bell-shaped rotor 5 including a shaft supported by roller bearings 12, 13 disposed inside the bell rotor. The stator 1, 6 defines two converging pumping stages, one in cooperation with the inner cylindrical surface 10 of the rotor and the other in cooperation with the outer cylindrical surface 9 of the rotor. The suction inlet 3 is disposed in the apex area 4 of the bell rotor. The discharge outlet 11 of the pump is disposed in the vicinity of the lower rim of the bell, and both pumping stages transfer gases towards this rim. In this way, gases introduced through the inlet 3 into the pump cannot penetrate into the motor space 15 and damage the bearings of the pump.

Abstract: This arrangement concerns a flow guide surface for ship propellers, at least for twin propellers, the propellers being mounted by means of propeller brackets. It is provided for to arrange, at least in the region between the arms of the propeller brackets, a sectioned arcuate guide surface. This guide surface possesses a mean camber line converging backwardly towards the propeller shaft and the outlet edge has a distance to the propeller shaft amounting to between 70 and 130% of the propeller radius. This arcuate section of the guide surface is connected, on the side facing the ship's hull, to an approximately horizontal radial part.

Abstract: In an axial flow gas turbine with reaction blading, whose outlet rotor blades (14) are followed by a diffuser with axial outlet into an exhaust gas pipe (13), the kink angles of the diffuser inlet both at the hub (10) and at the cylinder (9) are fixed exclusively for the purpose of evening out the energy profile over the duct height at the outlet from the last rotor blade row in order to shorten the diffuser system and to optimise it in part load operation. In addition, a mechanism provided to remove swirl from the swirling flow in the form of profile ribs (17). Where the outlet rotor blades have a high Mach number flow, which leads to a large opening angle of the blading, the diffuser is subdivided into several partial diffusers (16) via sheet metal guides (15).

Abstract: A multistage centrifugal pump, incorporates a first housing (14) having a cylindrical wall (30) defining a portion of the outer surface of the pump. A first diffuser (15) is fixed to the first housing (14) and has a discharge opening (43). A first impeller (16) is rotatably received within the first housing (14) in operative association with the first diffuser (15). The first impeller (16) includes an inlet opening (25). At least a second housing (14) is provided concentric with, and axially adjacent to, the first housing (14) and has a cylindrical wall (30) defining a portion of the outer surface of the pump. A second diffuser (15) is fixed to the second housing (14) and has a discharge opening (43). A second impeller (16) is rotatably received within the second housing (14) in operative association with the second diffuser (15). The second impeller (16) has an inlet opening (25) fluidly communicating with the discharge opening ( 43) of the first diffuser (15).

Abstract: A marine propeller (4) combines decreasing overall pitch from hub (6) to blade tip (20) and increasing progressiveness of pitch with increasing radii from hub to tip, and provides uniform loading from hub to tip. The balde has a maximum transverse dimension (36, 46, 48) between the high pressure surface (16) of the blade and a straight line chord (34, 34a, 34b) between the leading edge (22) and the trailing edge (24) of the blade. The ratio of this maximum transverse dimension to the length of the chord is ever increasing from hub to tip. A parabolic blade rake along the maximum radial dimension line (50) of the blade is provided in combination.

Abstract: A slurry pump suction side liner with replaceable components is provided utilizing separate suction port assembly, wear ring assembly, wear plate assembly and backing plate assembly components connected together to form a rigid suction side liner for directing a slurry into an impeller inlet. A replaceable annular wear ring having a first wear resistant surface facing the inlet axis and a second wear resistant surface at right angles to the inlet axis is provided to maintain a predetermined gap between gap between the impeller and replaceable wear ring to prevent slurry flow between the impeller and suction side liner assembly. An annular wear plate assembly having a wear resistant surface flush with the second wear resistant surface on the wear ring assembly is also provided to extend the gap radially outward from the wear ring, which is positioned between a suction port and the impeller.

Abstract: A rotating impeller for stirring liquids contained in tanks. Strip-like blades of simple form radiate from a central hub, in swept-back configuration relative to the direction of rotation. The blades are angled relative to the hub so as to exert a forward and downward force upon the liquid as the impeller rotates, and the blade curvature is such that the area projected upon the liquid by the solid structure of the rotating blade is less than the corresponding area that would be projected by an otherwise similar blade in which imaginary straight lines connected all adjacent vertices, and any void areas lying within the boundaries of those imaginary lines had been filled in. The preferred arrangement of the blades is such that when the impeller is arranged with its axis vertical, curvature of each blade along its length is such that it extends away from the hub in a diminishing downward curve, reaches a lowest point, and then rises again before the blade tip is reached.

Abstract: A variable geometry radial turbine wherein a plurality of pivotable vanes are provided in the portion through which a gas is introduced into a turbine wheel which is disposed in a turbine housing. The pivotable vanes can be moved for the purpose of opening and closing a part of a gas introduction area whereby the gas flow rate is continuously changed.

Abstract: A portable electric fan having a base in the form of a large clip, a yoke assembly which is mounted on said base for tilting movement back and forth about a horizontal axis and rotational movement about a vertical axis and a fan unit mounted on the yoke assembly, the fan unit including a motor actuating switch mounted outside of a motor housing is disclosed. The clip type base enables the fan to be easily attached to the side edge of a desk or table top or arm of a chair or the like while the location and mounting arrangement for the motor actuating switch enables the fan unit to be easily assembled.

Abstract: A fluid flow machine, particularly a centrifugal pump, wherein the casing has a tubular first portion serving to convey a stream of fluid radially toward a pump shaft which drives one or more impellers. The casing has a second portion with an arcuate band-like wall which spacedly surrounds the shaft and defines a passage having an oval cross-sectional outline and receiving fluid from the outlet of the first portion. A cylindrical outlet of the passage is adjacent the foremost impeller or the only impeller of the pump. One or more guides are provided in the passage to control the flow of fluid from the outlet of the first portion of the casing toward and into the range of the foremost impeller.

Abstract: A pump unit, particularly for use in a dishwasher, includes first and second pumps having respective impellers and a motor drive shaft fixed to the two impellers for alternately rotating the impellers in a first direction, during which only the first pump delivers a liquid, and an opposite second direction during which only the second pump delivers a liquid. The first pump is a peripheral outflow pump, and the second pump is a centrifugal pump the impeller of which includes blades oriented forwardly with respect to the second direction of rotation.