Abstract: Tungsten anode targets are joined to graphite substrates by a brazing method employing a controlled atmosphere and a suitable braze material such as platinum and an alloy of platinum and chromium.

Abstract: A double-contact rivet is formed from wire portions cut from wire supplies. The wire portions are aligned so that outer portions of electric contact material are located on either side of a central portion of support material, and the two outer portions are cold-welded to the central portion. One end of the body so formed is punched to provide a contact head while the bead formed by the cold-welding at the other end is pressed to a substantially flat ring form and hardened by rapid cooling. The hardened ring bead is cleanly cut from the remainder of the rivet.

Abstract: A method and apparatus are provided for soldering abutting ends of links of chains of precious metals. The soldering is accomplished by applying solder to the abutting ends, continuously feeding the chain onto a rotating surface such as a rotating table, heating the chain to melt the solder, and removing the chain from the table. The chain is fed at a slightly higher rate than the rational speed of the table to cause the links to be pushed into each other to avoid tensions from developing in said links during the heating step.

Abstract: An improved wall construction and method of fabrication is disclosed in which a wall assembly is comprised of a base metal layer of mild steel with a bonded intermediate layer of copper and a bonded layer of corrosion resistant material containing a fusion weld joining the steel base metal members with the root of the fusion weld abutting an inlaid insert of the corrosion resistant material, a fusion weld joining the layer of corrosion resistant material of the members to each other and to the inlaid insert of corrosion resistant material to provide a relatively smooth surface in the corrosion resistant layer, with the intermediate copper layer removed from the weld areas.

Abstract: An apparatus for automatically positioning a wire bonding machine at a second bond position is provided with a plurality of individually adjustable second bond positioning devices set at second bond positions and cooperable with second bond positioning actuating means. After positioning a semiconductor at a first bond position and completing a first bond, the second bond actuating means cooperating with a second bond positioning device automatically moves the semiconductor to a second bond position. After completing the second bond, the second bond positioning actuating means is released permitting the semiconductor to return to a first bond position as another second bond positioning device is cycled into active position.

Abstract: A method of fabricating a solar heating unit having tubular conduits for containing high pressure fluids is disclosed. The method comprises the steps of forming a thin sheet of soft metal, preferably a fully annealed copper sheet, by applying sufficient temperature and pressure to creep or thermally form the sheet in a grooved plate using an assembly of the fluid conduits having a paste solder applied thereon. The solder is melted during the creep forming step to form a good metallurgical bond between the sheet and the conduits.

Abstract: The longitudinal welding seam of a tube is subjected to flexing to obtain strengthening by up and down bending followed by one or multiple stage rolling which in turn is followed by sizing.

Abstract: A container adapted to contain a beverage or other goods is provided with an easy open top by a disk juxtaposed to a hole in the container lid and welded to the container lid by a ring weld circumscribing the hole. Access to the contents of the container is attained by pushing the disk into the container whereby the disk tears along the weld and does not separate from the lid.

Abstract: A blade fabricated of a plurality of bonded filament laminates, at least one of the laminates characterized by a plurality of continuous, collimated filaments embedded in a different matrix at the blade tip than at the blade root. The matrices are characterized by different relative impact strengths.

Abstract: The machine comprises an endless guiding path for mobile supports equally spaced by a distance smaller than the length of the smallest heat exchanger to be brazed. The supports have protruding portions cooperating with the bottom on the same side of the end plates of the heat exchangers.

Abstract: A fabricated article, including a portion of non-uniform sectional thickness, is provided through an improved method employing a plurality of cooperating, particularly shaped and sized sheet metal members or member portions which, in an article including a cavity, generally define selected inner and outer surfaces of the article. Also employed is at least one particularly shaped and sized insert member to provide increased sectional thickness in a selected portion. The sheet metal members or member portions and the insert member are assembled at bonding surfaces so that the sheet metal members or member portions retain the insert between them. Thereafter, the assembly is fabricated into the article by solid state diffusion bonding at the bonding surfaces.

Abstract: A portable grinding apparatus which refinishes the cylinder head retainer seat in an engine block to provide a surface substantially flat and square with the axis of the cylinder bore. The positioning discs are axially mounted on a central shaft, the lower of these discs enables the grinding apparatus to be initially inserted and centered within the cylinder while the upper disc is expandable within the cylinder for securing the grinding apparatus in the proper orientation for a grinding tool to refinish the surface of the cylinder head retainer seat square to the axis of the cylinder bore.

Abstract: An alloy comprising silver plus one or more additives taken from the class consisting of gold, platinum, osmium, iridium, palladium, ruthenium and rhodium is disclosed. Each additive metal is present in an amount of from 0 to 1% by weight of the alloy. The total amount of additive is at least 0.05% by weight of the alloy. A method of making permanent electrical connections using the alloy is also disclosed.

Abstract: A contacting head for making a wire connection, particularly an aluminum or gold wire connection on an integrated circuit by ultrasonic or thermocompression bonding, in which a contacting arm is provided with a concave contacting tool or a capillary, and supplies ultrasonic or heat energy. The concave contacting tool has a gripper, or the capillary has a wire clamping device for effecting a feed or clamping of the wire during movement of the contacting arm. A driving unit provides for threading the wire through a wire guiding device which is entirely enclosed, and through the concave contacting tool or the capillary. The driving unit also provides for controlling the wire tension and produces a gas stream in the enclosed wire guiding device. A magnetic arrangement with a permanent magnet and a non-ferrous core provides for electrodynamic contact pressure control of the contacting arm and for control of the gripper.

Abstract: A blade for use in a blast impellor wheel for use in cleaning castings has both faces identical and symmetrical about its longitudinal axis so that both faces can be used as abrasive throwing faces. The blast impellor wheel comprises two interconnected parallel side plates each of which has a central opening. Opposed pairs of slots are provided in the inner faces of the side plates and these slots are transversely stepped so that protruberances on the side of a blade can abut against the ledges so formed.

Abstract: A device is described for masking the gold connector tabs located along the edges of printed circuit boards to prevent the connectors from becoming solder coated during wave solder operations. The device is comprised of a pair of angle sections coupled to each other by tensioning means. The sections are easily applied to the circuit board assembly without scratching the gold contacts. Moreover, they provide stiffness to the board and a dam to prevent solder from flowing over the board and damaging the electrical components mounted thereon during wave soldering. The device is easily removable from the circuit boards after soldering and is reusable. Finally, the device of the present invention is characterized by long life, reasonable cost and ease of use.

Abstract: Holder for a welding head for carrying out welds on the innerside of a substantially closed body, said holder being in the form of an elongated member, the end portion of which is provided with a holding member for the welding head adapted to pivot from an axial position to a radial position, and wherein means are provided for controlling said holding member.

Abstract: A method and device for unsoldering semiconductor modules which are soldered onto terminal surfaces of a carrier by terminals pads composed of soft solder is disclosed herein. A suction cup is placed onto a semiconductor module to be unsoldered and the terminal pads are melted. The suction cup is raised together with the semiconductor module, and, with a burst of compressed air, the semiconductor module is removed. The suction cup is then lowered onto the terminal surfaces and soft solder residues are melted and sucked away.

Abstract: A method of electrically and hydraulically connecting a conductor bar having a plurality of hollow water-cooled conductors involves compressing the conductor bar and shims of brazing material in a connector clip formed of a pair of mating clip members. Brazing shims (strips and bands) are placed in desired positions, and then the components are heated and hydraulically compressed. The conductor bar and brazing material assembly is sized for a tight fit in one dimension, but oversized in another dimension so that compression results in a desired distribution of the molten brazing material. During compression, the clip members are secured from relative motion, other than displacement toward one another, and air is passed through the hollow conductors to prevent the accumulation of brazing material in the open ends thereof. In addition to the clip members, the connector device includes a water inlet member with a stem that is inserted between and brazed to the clip members after the compression step.

Abstract: A method for making cylindrical welded wire screens by continuously bending a wire into a helical wrap with juxtaposed equal wraps having their diameter substantially equal to the desired finished diameter of the screen whereby the radius of curvature applied to the wire is smaller than the radius of the wrap and the bending area is inside the outer circumference, supporting the wraps and progressively guiding them and bringing them into contact with supporting wires substantially parallel to the generatrix of the cylinder, and welding the wraps to the supporting wires at their contact points.