Abstract: The cartridge of a fan outlet for a multiple flow turbojet engine is made of composite material and includes two thick lateral strips (8a, 8b) positioned in the interior of the outer case and a narrow central band pierced with slots (10) in which guide vanes (5), provided with an in-molded cover, come to be fixed. The outer cartridge can be integral with the support of soundproofing panels (7 and 9) and support the abradable part (6) facing fan (3).

Abstract: The arrangement is of the kind in which at least one water turbine (11) is located in the path of a water source for power generation, comprising a barrage structure (10) which extends across and above the level of the water source (12). The invention is characterized in that the structure is of a cross-sectional width sufficient to absorb static and dynamic loading from said water source and defines only a draught tube (15) for the turbine, in that the turbine is mounted within an inlet casing (19) to form a separate assembly, in that the outlet end of said inlet casing is adapted to be releasably connected to the inlet end of said draught tube, in that locating and locking means (24, 25) are provided for effecting said releasable connection, and in that means (20 to 22) are provided for supporting the weight of the turbine/inlet casing assembly when connected to the draught tube.

Abstract: A tandem master cylinder for hydraulic brake systems of automotive vehicles comprising a housing in whose bore a first and a second piston are sealingly and slidably disposed. The piston in the inactive position abut on stops in the housing under the action of a first and a second resetting spring and which, within the bore, confine a first and a second pressure chamber which are in communication with a first and a second unpressurized supply chamber via central valves that are open when in the inactive position. The first piston-resetting spring is anchored on the second piston, and its spring rate is greater than the spring rate of the second piston-resetting spring.

Abstract: A steam turbine in which the number of shell penetrations is reduced to six, without the use of T or Y fittings, by controlling steam flow to large nozzle chambers with a single large valve, rather than two smaller size valves. Secondly, adjacent valves are oriented in opposite directions, with those valves controlling nozzle chambers in the upper casing of the turbine opening to provide downward flow. This arrangement achieves two benefits: first, it reduces the number of turns and the length of the "spaghetti" piping leading to the nozzle inlet snouts, providing a straighter and more direct route for steam flow; and secondly, the inversion of adjacent valves allows room for installation of individual servomotors for each valve, which in turn enables greater flexibility in valve actuation sequencing. The invention also provides an improved method of valve sequencing.

Abstract: There is provided a connecting rod for connecting a crank pin of an electric motor to a reciprocated piston. The connecting rod includes a sheet metal shaped member that at each end has a deep drawn cylinder mounting which in turn mounts a bushing that is of a greater axial length than the cylinder mounting. The shaped member has a longitudinal bead providing a depression extending adjacent to one of the mountings and terminate in spaced relationship to the other mounting whereby there is a planar surface extending transversely across the member longitudinally between the bead and the other mounting and adjacent to the widest part of the member to provide a bending line.

Abstract: A molten metal pump includes a filter that prevents ingestion of foreign material such as dross from molten metal within which the pump is immersed. The filter is a large structure that is secured to the base of the pump surrounding the pump's inlet. The filter forms a cavity adjacent the pump's inlet. The ratio of the surface area of the filter to the inlet area of the pump is very large; the filter has a low porosity while maintaining a high flow rate for the pump.

Abstract: A hydraulic servo cylinder device for controlling a speed reduction ratio or clutch operation in a continuously variable transmission comprises cylinder and a piston slidably fitted in a cylinder chamber of the cylinder. The cylinder chamber is divided by the piston into a rod-side cylinder chamber and a head-side cylinder chamber, the rod-side cylinder chamber being supplied with a hydraulic line pressure, the head-side cylinder chamber being supplied with a hydraulic control pressure. When the piston is moved to a position near a head-side stroke end, the control pressure in the head-side cylinder chamber is so set that a hydraulic force which the piston receives from said control pressure is in equilibrium with a hydraulic force which the piston receives from the line pressure.

Abstract: In order to facilitate efficient use of high pressure cooling air in a turbine rotor blade its aerofoil has a triple-pass convoluted cooling air duct in its leading edge region, and a triple-pass convoluted cooling air duct in its mid-chord region, both of them being fed from a common high pressure inlet in the root of the blade. The trailing edge region has a single-pass duct fed by low pressure cooling air from an inlet located just under the blade platform. The shroud of the blade also has cooling air passages and these are fed from the ends of respective ones of the ducts. Air from the ducts also exits through rows of film cooling holes to film cool the concave flank of the aerofoil and through a row of holes in its trailing edge to remove heat from the thinner metal section in that area.

Abstract: System for repairing worn surfaces of steam turbine components and especially high pressure turbine rotors, are disclosed. These systems include depositing a first layer of weld metal on a worn surface of the component, whereby a heat-affected zone is created. A second layer of weld metal is then deposited over the first layer using a greater amount of heat to temper at least a portion of the heat-affected zone produced by the first layer. The preferred embodiments include the use of gas tungsten arc welding for providing fine-grain size and more creep resistance, especially in the weld and heat-affected zone. The resulting build-up can be machined, for example into a blade fastening to produce a component having properties equal to or better than the base-metal alloy. The invention also provides a longer lasting turbine system, including rotors which have serrated steeples that are more resistant to failure.

Abstract: A multistage centrifugal compressor has a shaft rotatable on an axis and a plurality of centrifugal impellers fixed on the shaft and having outlets at outer peripheries thereof. Conduits connect the impellers to from a path for fluid undergoing multi-stage compression by the impellers from a suction side to a delivery side. The conduits including a plurality of diffusers arranged radially outwardly from the impellers, each impeller and associated diffuser constituting a stage. At least two of the diffusers are vaned diffusers provided with vanes having leading edges at their inlet ends. To provide high efficiency combined with low risk of rotating stalls, among the vaned diffusers, the ratio of diffuser vane leading edge radius to impeller outlet radius increases along the fluid path from the delivery of the compressor to the suction side.

Abstract: In a hydraulic drive system, first and second flow control valves means comprise each: a main valve having a valve body for controlling communication between an inlet port and an outlet port both connected to a main circuit, a variable restrictor capable of changing an opening degree thereof in response to displacements of the valve body, and a back pressure chamber communicating with the outlet port through the variable restrictor and producing a control pressure to urge the valve body in the valve-opening direction; a pilot valve connected to a pilot circuit which is connected between the inlet port of and the back pressure chamber of the main valve; and an auxiliary valve connected to the pilot circuit for controlling a differential pressure between the inlet pressure and the outlet pressure of the pilot valve.

Abstract: A fluid pressure control system comprising a first selector valve for controlling the action of a first actuator, a second selector valve for controlling the action of a second actuator, a first flow control valve for controlling a fluid to be supplied to the first actuator, and a second flow control valve for controlling a fluid to be supplied to the second actuator. A pressure reducing valve is provided for reducing the pressure of the fluid supplied to the second actuator. The pressure on the outlet side of the pressure reducing valve is controlled by the proportional pressure relief valve which is controlled by an external pilot pressure. This system is applicable, for example, to a hydraulic excavator.

Abstract: The space within the interior cavity (7) of the piston (1) limited by the partially spherical head (5) of the connecting rod (6) is filled with a viscous, pasty or plastically ductile fluid (13), practically incompressible at the operating temperatures and pressures of the piston (1), the diameter (D) of the cylindrical support (8) which limits laterally the cavity (7) being very slightly greater than the diameter (d) of the partially spherical head (5) of the connecting rod (6) so that the clearance during operation between said support (8) and said head (5) is sufficiently minor to prevent any leakage of said fluid (13) from said space at the operating temperatures and pressures of the piston.

Abstract: Downstream of a paper leaf stacking machine, e.g. a paper napkin folder, there is a device comprising supports on each of which is mounted at least one leaf separating finger.Each support is kept, by a stop, in a fixed position corresponding to that in which the paper folder forms and deposits the folded leaves. After a predetermined number of leaves have been deposited, the stop is disengaged and the finger is snapped in between one sheet and the next and so advances at least part of the way with the stack of folded sheets. At a certain point of the path, each pack of leaves, as marked by two successive fingers, is lifted out by a forceps or the like and each support is returned to its starting position.

Abstract: In a peripheral fuel-conveying pump, in which the rotatable impeller, provided with a plurality of vanes spaced from each other by grooves, is enclosed with the housing of the pump so that a fuel-feeding passage is formed between the inner wall of the housing and the periphery of the impeller. The dimensions of the fuel-feeding passage are defined by the first geometric characteristic R.sub.m which is a ratio between S and L, wherein S is the cross-sectional area of the space enclosed between the housing wall, defining the feeding passage, and the periphery of the impeller, and L is the length of the periphery of the portion of the impeller inserted into the fuel-feeding passage. R.sub.m must be in the range of 0.4-2 mm. The dimensions of the fuel-feeding passage are also limited by the second geometric characteristic R.sub.s =B/E and the third geometric characteristic RA=B/E, which must be in the range of 0.5-1.

Abstract: Of the components making up the pump, one part including the bearing is removably assembled into the other part so that the bearing is received in the other part. This structure allows easy removal of the first part of the pump components from the second part for disassembly and for maintenance and inspection of the pump. The pump can also be reassembled with ease by inserting the first part into the other part.

Abstract: The present invention provides a protective device for a working member, such as the piston rod of a piston and cylinder actuator, which is arranged at least partly in a receiving member and is able to be moved and more especially slid, along a curved or straight path so that it projects to a greater or lesser extent out of the receiving member. The device is provided with a plurality of sleeve-like guard sections which surround the working member projecting out of the receiving member along the full length of the working member so that whatever the position of the latter any two adjacent guard sections overlap each other and are able to be slid in relation to each other, one of said guard sections being stationarily arranged on the receiving member and another guard section being arranged on the working member so as to move therewith so that in accordance with the actual axial extent of the part of the member to be protected the sections are telescoped into each other to a greater or lesser extent.

Abstract: A brake booster includes a key member coupled to a valve plunger. When the booster is inoperative, the key member is brought into abutment against an inner wall surface of a shell to limit a free retracting movement of a valve plunger and its connected input shaft so that a lost stroke of the input shaft can be reduced when the brake is operative for the next time. According to the invention, a shell includes a cylindrical extension which is circumferentially and integrally formed with an annular bulge which extends radially inward, with a seal member disposed on the rear side of the annular bulge.

Abstract: An apparatus for adjusting a diameter of a folding drum in a rotary press includes essentially, bands, slide bases, screw rods, sun gears, a differential device and mechanism for operating the differential device. The bases, formed with internal threads, support the bands. The screw rods, fitted in the internal threads, have pinion gears. The sun gears are concentric with the folding drum, mesh with the pinion gears and are rotatable with respect to the folding drum. The operating mechanism changes phases of the sun gears with respect to the folding drum. Then, the screw rods rotate, and the bands expand and contract, thus adjusting the diameter of the folding drum.

Abstract: A water pump apparatus has an impeller mounted on a driven rotational shaft rotatably supported by mutually spaced bearing portions in a body member. In order to lubricate the sliding bearing surfaces between the bearing portions and the rotational shaft, oil seals surrounding the rotational shaft define first and second oil tanks, while a third oil tank is defined between the bearing portions. Spiral oil circulating grooves pump oil from the first and second tanks along the sliding bearing surface to the third tank in order to lubricate the sliding bearing surfaces. Oil passages in the bearing portions permit oil to be returned to the first and second tanks. An annular flange fitted on the rotational shaft fits between the bearing portions to provide axial bearing support for the rotational shaft. Excess oil pressure arising due to heat build up is relieved by a check valve mounted in the body member.