Abstract: The disclosure relates to a turbine rotor and method of manufacture thereof. A plurality of blades having dovetails at the radially inner ends thereof are arranged in a circumferentially spaced circular array. A metallic hub is cast about the dovetails of said blades which are metallurgically bonded by the operation. Alternatively, the blades may be joined to the hub thereafter by an electron beam weld that extends axially to the rotor.

Abstract: A heat resistance structure adapted to be used in a passage of a high temperature fluid, comprises a heat resistant metal plate having a smooth outer surface, a layer of a substance having a high heat transmission resistance extended along an internal surface of the metal plate, and heat conductive bodies provided in close contact with the layer, all being arranged in this order from the outer surface of the structure to the interior of the structure. A plurality of coolant passages are further provided through each of the heat conductive bodies.

Abstract: An axial-admission steam turbine, includes a steam inflow region, guide vane rings including a first guide vane ring, guide vanes of the first guide vane ring having radially inner ends, a shaft being rotatable in a given direction, an annular shaft shield being connected to the radially inner ends of the guide vanes of the first guide vane ring and being disposed in vicinity of the steam inflow region, the annular shaft shield surrounding the shaft at a distance defining a ring canal therebetween, the annular shaft shield having nozzles formed therein for discharging into the ring canal tangentially relative to the shaft as seen in the given direction of rotation of the shaft.

Abstract: A hydraulic system is disclosed which provides automatic proportional actuation of pairs of hydraulic cylinders. The proportioning mechanism comprises one or more standard hydraulic cylinders.

Abstract: A cooling fan and hub support for a vehicle with reversible blades is disclosed. The fan has a hub support comprising an outer ring having inwardly extending projections and an inwardly directed flange. Each blade has a stem received in a hole in one of the projections. An inner retaining ring which has outwardly extending projections is supported concentric with the outer ring. A helical spring is received in each of the projections and extends into a blind hole in each stem and the inner end of the spring rests on a retaining ring. The outer ring has spaced holes for attaching it to an engine shaft. The retaining ring has convolutions which curve outwardly around each of the spaced holes and have an arcuate circumferential part that supports each inner end of a spring.

Abstract: An overhung steam turbine is described which features a seal assembly and a bearing assembly to minimize axial shaft movement. The seal assembly forms a pressure barrier between a relatively low vacuum exhaust region and an exhaust cavity disposed at one end of the rotor shaft to minimize the pressure differential across the ends of the shaft and the resultant thrust force of the rotor shaft against the turbine casing. A bearing assembly is provided which includes a pair of journal bearings and a pair of oppositely disposed thrust bearings. In one embodiment one thrust bearing is connected by an adapter ring which is mounted to a horizontally split bearing casing. In another embodiment, the thrust bearing is carried by one of the journal bearings. The journal bearings are preferrably connected by horizontally split ring bearings to facilitate insertion and removal of the bearings without removing the overhung shaft.

Abstract: A pumping apparatus is adapted for providing a small amount of flow rate under high pressure and includes a pumping chamber, a rotating shaft and an impeller in the form of a disk which impeller is connected at its central portion to the rotating shaft to rotate in the pumping chamber. A first pumping section of the pumping apparatus comprises a bypass regenerative pump which includes grooves formed on the opposite side surfaces of the impeller and arranged in a circle surrounding the rotating shaft, and groove-like channels formed on the wall of the pumping chamber in facing relationship to the grooves on the impeller with narrow gaps therebetween. A second pumping section of the pumping apparatus is connected in series to the first pumping section between the outer peripheral portion of the impeller and the wall of the pumping chamber, and comprises a regenerative pump which includes grooves provided on the outer peripheral portion of the impeller.

Abstract: An improved seal cooling apparatus is provided for use in a gas turbine engine. In a particular embodiment, this apparatus includes means for deriving conditioning air from air discharged from the compressor diffuser and directing this air onto the seal stator to improve its thermal response. The apparatus also includes means to inject a portion of the conditioning air into a cavity forward of the seal to purge the region and prevent zero airflow conditions during engine operation for the purpose of discouraging overheating of a portion of the compressor rotor. A portion of the conditioning air from the cavity is subsequently directed to flow through and thereby cool the seal.

Abstract: The piston pin for a piston of an internal combustion engine is provided with a certain number of passages, each opening into the annular groove of the bearing bushing of the connecting-rod small end and into either of the annular grooves of the pin bearings. The passages are provided in a peripheral portion of the piston pin so to avoid a central portion of the pin, in which a concentration of metallic impurities is maximum.

Abstract: A radial fan comprises a spiral-shaped fan housing (1) and a drum-shaped wheel (9) which rotates in the direction in which the spiral increases and has an opening (15) facing towards an intake (16) in the end wall (5) of the housing. The area of the duct (18) formed by the housing and the periphery of the wheel increases continuously from a point where the duct cross-section is smallest up to an outlet part (21) where the cross-section is greatest and where the area is at least equal to the radius (R) of the wheel times its length (L). The intake is made eccentric by a guide vane (23) installed at the opening and extending near the inside (17) of the wheel by an edge part (26) located after the said point, cutting off the cross-section of the duct outwardly of the outer end (13) of the wheel. The rear face of the guide vane and the end wall (5) form an inwardly facing flow surface (33) which extends over approximately half the periphery of the wheel.

Abstract: A seal assembly for a rotary machine comprises a rotary machine part of a hard rubber-like elastomer and a sheet metal hub surrounded by the rotary machine part and being permanently bonded thereto. The sheet metal hub is generally sleeve-shaped and has a radial base situated within the rotary machine part and a generally cylindrical wall extending substantially along the entire axial length of the rotary machine part in a coaxial relationship therewith. The seal assembly further has a counter ring in contact with the rotary machine part and a slide ring seal unit being in sliding contact with the counter ring.

Abstract: An electropneumatic door control for vehicles is disclosed which consists of a pneumatic portion and an electronic portion. The electronic portion processes successive commands actuated by the vehicle operator to channel the signals to the pneumatic portion of the apparatus to activate alternate door openings and closings. Any blockage of the door movement is detected and signals processed to reverse the door closing or to halt the opening until the fault is corrected. The electronic portion also assures that the vehicle doors can only be opened after the vehicle has come to a stop, that when the vehicle doors are open the station or parking brake is held engaged, and that an audible warning signal sounds for a predetermined interval before the closing of the door.

Abstract: A stress corrosion cracking proof steam turbine in which dry steam is blown into the gap between the hub portions of adjacent turbine discs, thereby preventing corrosion in the gap. A nozzle diaphragm is provided between the discs and has an inside circumferential face which straddles the gap. Labyrinthine packing is provided on the inside face of the nozzle diaphragm and comprises an upstream, an intermediate, and a downstream group of fins. A steam reservoir is located between the intermediate and downstream group of fins and straddles the gap. A steam supply means is located inside the nozzle diaphragm and provides dry steam (from inside or outside the turbine) to the reservoir and thus to the gap. To prevent leakage of high pressure wet steam into the reservoir, a steam leakage capturing means is provided between the upstream and the intermediate group of fins.

Abstract: A hydraulic pressure cylinder with an integrated reservoir which includes a cylinder body of strengthened resin, a reservoir tank of strengthened resin molded with the cylinder body as one body and having a wall portion and an opening formed in the wall portion of the reservoir tank and having a frame portion defined by the opening, and a window plate formed of resin material soluble in said strengthened resin and having a high transparency characteristic, the window plate including a flange which is welded to an inner surface of a wall portion of a reservoir tank and a projecting part which projects from the flange toward an outer surface of the wall portion of the reservoir tank along the frame portion.

Abstract: A turbine scroll passage of a turbine is divided into first and second scroll passages extending in parallel to each other along the scroll passage. The first passage is formed with a side aperture for directing the fluid in the scroll passage to a turbine wheel. The second passage is isolated from the side aperture by a partition wall separating the second passage from the first passage. The partition wall is formed with a longitudinally extending opening for providing a fluid communication between the first and second passages. The opening extends longitudinally through about 360 degrees around the axis of the turbine, and has a constant width over its length. In the secondary passage, there is disposed a valve of a swing, rotary or other type, for closing the secondary passage. When the turbine is a part of a turbocharger connected with an internal combustion engine, the secondary passage is closed by the valve in a low engine speed range.

Abstract: This invention provides in centrifugal motor pumps and the like a safety structure embodying a bearing bushing coaxially mounted with respect to the pump shaft in a space between the shaft and the body of the pump, with the bushing designed to act as a hydrodynamic bearing in the case of decentering of the pump shaft or similar disfunction only.

Abstract: A multistage turbine construction in which the cooling flow to the turbine rotor is controlled by cooperating sealing elements carried respectively by the row of vanes and by the rotor with the sealing surface carried by the vanes, the stationary surface being an outwardly sealing surface and the fins cooperating therewith carried by the rotor extending radially inward such that as the turbine rotor cools down during reduced power operation the sealing effect will be increased to reduce the flow of cooling fluid over the rotor surface.

Abstract: A turbo-molecular pump with passive, radial magnetic bearings and axial bearings has both direct and indirect damping arrangements for unwanted oscillations. Direct damping is produced by eddy currents produced in copper rings around the magnetic stators of the magnetic bearings. Indirect damping is provided through a platform, carried by springs and connected to the pump housing by oscillation dampers.

Abstract: The housing wall (23) through which the impeller shaft passes is embodied as a truncated cone. The leading edge (28) of the impeller blade flank (27) on the delivery side of the pump which grazes this housing wall with little clearance (24) extends in a spiral from the impeller blade tip (35) up to a point (31) at which it terminate in the hub; as a result, a relatively large area of the housing wall (23) having a width b decreasing toward the inside and located between the blade flank on the delivery side and the blade flank on the intake side is exposed between the blade outlet tip (35) and this terminal point (31).

Abstract: A reaction force mechanism for a brake power booster includes an elastic member (53) which forms a hydraulic pressure reaction force chamber (50) and is spaced from an end surface (17d) of an input shaft (17) by a predetermined distance (.delta.) so that braking hydraulic pressure is not immediately detected by a driver. In addition, a passage (57) normally provides communication between the hydraulic pressure reaction force chamber and a primary side pressure chamber (45) of the master cylinder, and, alternatively, provides communication between the hydraulic pressure reaction force chamber and a secondary side pressure chamber (46) of the master cylinder when no hydraulic pressure is established in the primary side pressure chamber of the master cylinder.