Abstract: In a nozzle dam assembly wherein a flange ring is affixed around a circular nozzle opening in a chamber wall, a support frame spans and is in non-threaded connection with the ring by releasable pins which carry under tension any load on the frame directed axially out of the nozzle into the chamber, and a circular dam with a sealing diaphragm disposed over it is attachable to the frame with its rim within the nozzle so that inflatable peripheral sealing means on the diaphragm effect the desired seal of the nozzle independent of the aforementioned axial load.

Abstract: The disclosure is directed to an improved method of determining a configuration or form of a piston employed for an internal combustion engine, based on investigations into and finding of a novel composite material which imparts a sufficiently high degree of smoothness to the surface of an abraded covering layer for a piston and can quickly provide a desired piston profile even for a small-sized gasoline engine, etc.

Abstract: A process and an apparatus for forming an air gap pipe are provided. Inner and outer pipes are bent or deformed into comparable configurations such that the inner pipe can be mounted within the outer pipe. The outer pipe then is split longitudinally by a preprogrammed cutting apparatus. The cutting of the outer pipe terminates just short of the complete longitudinal length of the pipe to facilitate rematching later in the process. The cutter includes a follower to trace the actual configuration of the pipe and thereby to offset differences from one pipe to the next. An array of clamps are provided to align the outer pipe halves relative to one another and to facilitate the reattachment.

Abstract: A method is provided for manufacturing a heat shield for an exhaust system component. The exhaust system component preferably is of tubular nonlinear configuration. The heat shield is formed from a larger pipe having an internal diameter greater than the outer diameter of the exhaust system component. Appropriately dimensioned inwardly directed supports are formed in the larger pipe. The larger pipe then is bent into a nonlinear configuration substantially identical to the configuration of the exhaust system component. The outer pipe then is cut longitudinally in half along its entire length to define a unitary nonlinear heat shield which can be mounted to the exhaust system component. A portion of the remaining half of the larger pipe can be reattached to the heat shield to provide an air gap pipe along a portion of the length of the exhaust system component.

Abstract: In the automatic equipping of, for example, printed circuit boards with components, the problem of the unknown position of the component legs occurs. According to the invention, the positions of the component legs in a component picked up by a gripper are measured by a sensor immediately before plug-in. This sensor is essentially composed of two independently horizontally movable perforated plates, each including an infrared emitting diode which emits onto a stationary position photodiode situated therebelow. The measured result can be employed for the positional correction or for the rejection or acceptance of the component.

Abstract: A piston ring is formed by annular upper and lower parts which contact one another at respective surfaces normal to the axis of the piston ring. The parts can be injection moulded from thermoplastics materials with the parts themselves having no re-entrant portions, so allowing quick and easy manufacture, but with the parts together defining re-entrant portions such as a spring-receiving recess at the inward side of the ring or a pair of spaced oil control rails at the outward side of the ring.

Abstract: A method of making a branched hose construction is provided and comprises the steps of providing a first tubular member having opposed ends, providing a second tubular member having opposed ends, forming the first tubular member to have an opening therein intermediate the opposed ends thereof, providing a joint construction that comprises a tubular insert having opposed ends, joining one of the ends of the second tubular member to the opening by having one end of the tubular insert disposed through the opening and the other end thereof interconnected to the one end of the second tubular member whereby the tubular members are in fluid communication with each other through the tubular insert and the second tubular member branches outwardly from the first tubular member, forming the joint construction to further comprise a washer-like member, telescoping the washer-like member on the tubular insert, and mechanically clamping the one tubular member between the washer-like member and the one end of the tubular ins

Abstract: A piston is formed in two parts. The main part is formed by gravity die casting from aluminum or aluminum alloy and a second part of the piston is formed by a squeeze casting process to produce a material which is stronger and more resistant than the gravity die cast aluminum or aluminum alloy. At least one piston ring groove is formed in the second part. The two parts are then electron beam welded together to form the complete piston. The squeeze cast portion may be reinforced with whiskers or fibres to further improve its properties. This method of construction has the benefit that only the minimum amount of the piston is formed by the more expensive and time-consuming squeeze casting process so that parts of the piston which do not require the improved properties given by squeeze casting are simply gravity die cast. This is of particular benefit in large diesel pistons.

Abstract: An apparatus is provided for the automatic assembly of nuclear fuel rod bundles in a predetermined coordinate array. Each fuel rod is identified during its travel and positioned according to an identifying code carried on its lower end plug which designates the fuel enrichment and additive level of the rod.

Abstract: A helix of great length wherein the structure is filled with a filler and wherein the structure is produced by a practice in which the helix structure and filler material are caused to rotate about each other upstream of the point of convergence, while the helix retains its orientation, and the speed of advance of the helix and the speed at which the filler material and helix are rotated are so adjusted that the helix is advanced by one winding during each rotation. The filler material is a braided tubing. A core preferably prevents the tubing from collapsing.

Abstract: This invention is a method, together with an apparatus for practicing the method, wherein automotive exhaust systems, and the like, which become separated at their juncture to manifolds, or the like, by reason of breakage of fastening bolts, studs, and the like are repaired by the use of the apparatus consisting of clamping devices formed of a plurality of essentially "U" shaped frames with threaded elements in the legs of the "U" shaped frames which threaded elements engage adjacent areas of the separated exhaust system elements and draw them together by being moved through the threads into a clamping action.

Abstract: A method of manufacturing a rotor for rotary fluid pumps comprising the steps of assembling a hollow cylindrical body and both side plates to a hollow rotor body, providing the hollow rotor body with a plurality of sockets each receiving a separately fabricated U-shaped vane-groove forming member, and inserting the U-shaped vane-groove forming members into the respective sockets to fix the same to the rotor body by brazing. The U-shaped vane-groove forming member is made from a suitable material as a vane groove itself and sufficiently finished independently from the rotor body.

Abstract: In a method for crimping a tube end plate of a heat exchanger on a header box, there is provided a peripheral upright edge for enclosing an extra thickness defined by the header box. Portion of the upright edge of the tube end plate which has to extend, when assembled, at least in part above a flange of the header box is stiffened. The stiffened portion of the upright edge of the tube end plate is folded at least partly back onto the flange of the header box.

Abstract: A method and an apparatus for automatically positioning stationary and orbiting scroll members of a scroll-type fluid machine.

Abstract: A plain bearing comprising a metal backing, an aluminium based bearing alloy layer and a sacrificial overlay of pure tin applied directly to the bearing material without a nickle interlayer. The bearing alloy comprises by weight, 1 to 11% silicon, 8 to 35% tin, 0.2 to 2% copper with the balance being aluminium.

Abstract: A process is set forth for making a structure formed of at least two metallic workpiece sections each formed of a reactive metal. A mandrel having a nonreactive surface is sandwiched between the workpiece sections thereby preventing them from being in contact over a first selected area and allowing them to be in facing relation over a second selected area. A reactive metal contact is formed of the workpiece sections over the second selected area. The workpiece sections are maintained under coordinated temperature-pressure-time duration conditions to diffusion bond them at the second selected area. A gas pressure differential is applied between intermediate the workpiece sections and external of the workpiece sections to cause breakthrough at the first selected area and superplastic forming of at least one of the workpiece sections causing it to stretch in excess of its original surface area. The mandrel is removed from between the workpiece sections.

Abstract: An outer metallic ball-bearing ring has a ball-locating raceway on its inner bore. At least one sharply defined part pyramidal notch in a land of the bore of the ring projects inwardly from one side face of the ring terminating adjacent the raceway. A full complement of balls can be assembled in the raceway by splitting the ring as is known and the notch ensures the ring fractures along a defined axial plane when exposed to controlled force.

Abstract: Pressure fluid operated servo system method and apparatus including a servo valve operable by an input signal to effect a system output movement; and which servo valve is responsive to the time rate of input signal receipt to vary a gain ratio of system output magnitude compared to input signal value; and method of making such a servo valve.

Abstract: A method for producing a new edge on an airfoil blade is disclosed wherein cutting tools for shaping or reshaping the airfoil edge of a blade of a gas turbine engine are employed. A first tool is used to form the desired angle and thickness between opposed blade surfaces, and a second tool is then used to form an aerodynamically efficient contour. Thus, there is formed a uniform blade leading edge shape on the operative portion of the blade.

Abstract: The method of forming a lining in the cavities of a body by application of powdered metal consolidated and bonded thereon by a hot isostatic pressing process. A space lining the cavities in the body is provided by tubular members, one intersecting with the other or in close spaced relation thereto, powdered metal fills the space, a vacuum is drawn on the space, the body is subjected to forming conditions and then the body cavities are machined to their final shape with such machining generally removing the tubular members.