Abstract: A corrosion-resistant structural shape, clad by rolling and welding, has a base material consisting of an austenitic manganese steel and a cladding material containing alloy elements tending to phase precipitations. In a method of producing a structural shape of the above described type from a cladding pile composed sandwich-like of two base material plates and two smaller cladding sheet bars, a separating layer is inserted between the cladding sheet bars and the gap surrounding the cladding sheet bars is closed all around by means of weld strips fused with the base material plates. First the edges of the base material plates are ground beveled and then the ground-off material is replaced by building-up welding layers of carbon steel. The pile is composed and the weld strips are inserted and connected with the claddings by means of root seams along the circumference of the pile.

Abstract: A method for bonding graphite sheets to a metallic substrate. The metallic substrate is provided with a coating of low melt metal which forms an intermetallic phase or zone at the interface between the substrate and coating. The coated substrate while in solidified condition is placed in a press between a pair of graphite sheets. Heat is applied to the substrate and graphite sheets while under pressure to a temperature slightly above the melting point of the substrate coating but below the temperature which will destroy the intermetallic interface. The substrate and graphite sheets are cooled while maintained under pressure in the press with the graphite sheets becoming firmly bonded to the metallic substrate by the resolidified metal coating.

Abstract: A vessel for containing molten solder has a cover movable by a drive so as alternately to uncover and cover the molten slag in the vessel. A slag stripper is also movable by the drive during uncovering movement of the lid to remove slag skin from the molten solder.

Abstract: An apparatus comprising a round-like housing having two assemblies therein. In one assembly there is a group of extending members each having affixed thereto metal backing members, which are alternatively either segment-like or inverted segment-like and have mounted a pair of rollers facing each other across a weld backing strip, the extending members being movable and workable in alternative shifts. In the other assembly the extending members each have affixed thereto a roller, the extending members being movable and workable all in one movement. There are fluid cylinder mechanisms in the assemblies for moving the members in the above-mentioned manner. The aligning, the expanding and the welding of pipes are easily and stably accomplished by such apparatus performed without need of any tack welding.

Abstract: A method and apparatus for welding together two members such as relatively thick metallic plates. The plates are positioned vertically in the same plane and are spaced apart by a gap which is equal to the desired width of the seam or joint. A moving current of molten metal is caused to flow horizontally through the gap, starting at the bottom of the gap, until the plates are heated to a welding temperature, and then the flow is ceased to allow for weld solidification. For welding plates when the length of the weld is greater than the depth of the molten metal stream, the plates are moved downwardly simultaneously while continuing the flow of molten metal through the gap. The plates are moved at a rate which will allow for solidification of the weld metal until the gap is filled.

Abstract: Underwater welding apparatus including a welding chamber and at least one source of gas under pressure connected to the welding chamber through a demand valve, in which the demand valve allows the flow of gas to the chamber to increase as the increase in the hydrostatic head causes the pressure of the gas in the chamber to increase, and to decrease as the hydrostatic head decreases.

Abstract: A bonding wedge for joining or bonding wire leads to contact areas or elements in the semiconductor and electronic industry including a rectangular wire guiding hole extending therethrough cooperating with a positioning groove formed on the bonding tip.

Abstract: A mixture of powdered aluminum brazing alloy and a powdered flux consisting essentially of potassium fluoaluminate complexes is applied, in an aqueous vehicle, to aluminum surfaces which are to be joined, and the surfaces are then heated to brazing temperature while being maintained in juxtaposed relation to produce a brazed joint.

Abstract: A method of brazing aluminum parts where the brazing occurs between one aluminum part and a second part formed of either aluminum or another metal, wherein the aluminum or aluminum alloy has a braze cladding which is plated with a bond-promoting alloy prior to the brazing operation. If an aluminum brazing foil is utilized between the parts, the bond-promoting metal is plated onto the brazing foil. The bond-promoting alloy includes nickel or cobalt with a small amount of lead added thereto, such that the nickel-lead or cobalt-lead may be used individually or in combination.

Abstract: A method and apparatus for producing continuous lengths of coaxial products, such as coaxial cable, having concentric inner and outer conductors or other members, and an intermediate layer of dielectric or insulating material between the inner and outer members. A continuous length of the inner member is continuously advanced while a concentric layer of insulating material is continuously formed on the outer surface of the inner member, with the radial thickness of the insulating layer increasing in the machine direction in a predetermined zone traversed by the continuously advancing inner member. A continuous flat metal strip is continuously advanced alongside the inner member and is formed into an outer member surrounding the inner member, after which the longitudinal edge portions of the rolled strip are joined before the insulating material reaches its maximum radial thickness.

Abstract: A method of forging a solid flanged head on a hollow steel tube by positioning a cylindrical steel plug within a steel tube of the same grade, and extending said positioned cylindrical plug beyond the end of the tube, thereafter heating the end of the tube and plug beyond the critical temperature of the steel material, and thereafter forging the softened material so that a solid steel head is formed which extends beyond the continuous wall of the steel tube.

Abstract: A feeding device for solder in string form is equipped to advance a measured length of that string, when a finger clamp is actuated by a hand pulled two-arm lever. The finger clamp is pivoted and spring loaded on the free end of this lever; it clamps the solder string against a fixed lug of the hand lever, while the string is being pushed through a protective tube toward a soldering spot by a lever stroke. The stroke is halted by a stop. When the lever is released by hand, a return spring pulls the free lever end back toward a reel of rolled-up string. Meanwhile a finger of the finger clamp is sliding back along the string without gripping it, as the backward stroke of the hand lever takes the finger lock out of contact with the string. The Soldering Aid enables the solderer to use his free hand to pull in and hold wires in a compact electronic device. Without this aid, the same hand would be busy to feed solder at the risk of heating and damaging capacitors, thin plastic insulation or frame walls.

Abstract: An ultrasonic soldering system is described. Electrical and electronic components are assembled in a circuit board with their leads extending through holes in the board. The components are temporarily held in position in the board by means of a solid, solder-compatible, stabilizer material having a melting point below that of solder, which material couples the board and leads to one another. The component leads are then trimmed to finish length, and after trimming, the components are soldered in place utilizing vibratory energy in a body of molten solder. The vibratory energy in the solder scrubs the board and leads removing oxides and allowing wetting, thus eliminating the need for application of fluxes and surface preparation prior to soldering. The stabilizing material is melted and displaced simultaneously with soldering.

Abstract: A sleeve is held in a fixed position as a heating rod, which surrounds the sleeve, is lowered to engage an element carried by the sleeve so as to disengage the element from the sleeve and weld it to a substrate.

Abstract: A backing and alignment ring assembly for insertion in pipes, particularly for welding purposes, comprising a segmented backing ring and a pair of axially spaced hub members connected to the backing ring by radially and axially extending connecting means. When the hub members are drawn together the backing ring is caused to expand and engage with the pipe bore.

Abstract: The present invention relates to the making of an evaporator or condenser construction wherein ends of heat exchange tubes extending through heat exchange plates or fins are joined with return bend connectors. The ends of the tubes are provided with flared cups that telescopically receive the ends of return bend connectors. Nibs are formed on the outer surface of and extend outwardly a predetermined amount from the outer surface of the return bend connectors near the ends thereof. Grooves are formed on said outer surface and extend longitudinally between each nib and the end of the connector. When the end of a return bend connector is inserted into a flared cup, an interference fit between the nibs and the cup centers the end of the connector in the cup and frictionally retains the tube and the return bend in assembled relation when the assembly is inverted and thereafter submerged in a solder bath. The grooves provide vents for hot gases during the soldering operation.

Abstract: This invention refers to a novel arrangement for mounting a vibratory assembly concentrically within a cylindrical housing for use in a vibratory seam welding apparatus. A pair of metal diaphragms support the vibratory assembly at antinodal regions of motion along the longitudinal axis. These diaphragms are constructed for supporting the assembly within the housing and for providing acoustic energy isolation between the vibratory assembly and the housing while being yieldable in the direction of the vibratory motion along the axis of the assembly.

Abstract: An explosively operated welding cartridge is provided in which an annularly shaped explosive charge around a sleeve for receiving rod-like metal members is detonated by an ignition strip surrounding the periphery of the annular explosive. The arrangement of the explosive and ignition strip allows the detonation to start at a predetermined peripheral line and to proceed axially along the explosive on an even front to achieve a reliable weld of the sleeve to the metal members.

Abstract: The second wire bond is made in a semiconductor circuit simultaneously with breaking of the wire, in such manner that a "tailless" wirebond is achieved in minimum time and with no damage to either the wire or the bonding pad. The bond is made ultrasonically, and tension is applied to the wire during the actual time that ultrasonic bonding energy is supplied to the bonding tool. Such tension is applied by a spring or its equivalent, and is so predetermined that application of the bonding energy to the bonding tool will not only create the ultrasonic bond but will also break the wire.

Abstract: A method is disclosed for metallurgically bonding a protective sheet cladding to a convex-concave substrate such as an airfoil or turbine blade. According to the method of the invention, a preassembled sheet cladding and substrate is masked at all seams. The masked assembly is then placed in a deformable container with the remaining volume filled with glass chips. The container is thereafter outgassed and sealed air-tight. The container is then placed in a hot gas autoclave for diffusion bonding. During the diffusion bonding step, the glass melts and the container deforms thereby ensuring an isostatic stress state. The bonded clad-substrate is subsequently removed from the container for final cleaning.