Abstract: Continuous soldering of small elements along a line is achieved by a radiant beam spot lamp which moves intermittently along the line, and radiant energy is supplied only while the lamp is stopped to form partially overlapped heating zones.

Abstract: A method and means for more efficiently stabilizing a plasma arc produced within a plasma producing device. Improved arc stabilization is achieved by dissipating the heat generated by the electrodes of the plasma producing device under controlled conditions. This is achieved, in one instance, by direct liquid cooling of the anode and concomitantly therewith indirect liquid cooling of the cathode. The latter is achieved by passage of a liquid coolant around a heat sink positioned in conductive relationship with the cathode.

Abstract: A welding terminal operable to arc weld to a work piece a stud thereafter drive an element prethreaded to the stud. In one embodiment, the welding terminal may be adapted to cooperate with a guide to facilitate engagement with the prethreaded element, and in another embodiment, the welding terminal may have fluting or ribs to grippingly engage a portion of the prethreaded element. The duration of the arc weld and the sequencing of the welding and driving functions both may be automatically controlled. The normal force imposed on the fixed stud portion and the torque imposed on the movable threaded portion may be substantially automatically limited.

Abstract: A method of vertical welding of aluminum and aluminum alloys comprising welding Al or an Al alloy while oscillating in a welding groove an electrode in a closed pattern corresponding substantially to the groove shape, wherein the welding is conducted by using a welding current higher by 10 to 150 A than the base welding current at least during the course of oscillation of the electrode along the groove face of one of the materials to be welded while the electrode is pursuing courses of oscillation along both groove faces of the materials to be welded.

Abstract: A base is mounted on a welding machine and has slide rails. Each rail has paired flat top sides angularly converging upwardly toward one another. A table has slide channels also each having paired flat sides angularly converging upwardly toward one another at angles substantially equal to that of the rails. The table channels rest on the rails with their flat sides in sliding relationship to the flat sides of the rails. When welding forces are applied to the table, the flat sides of the rails and channels jam or wedge into substantially solid electrical contact at their interface due to their angulation. A shield is attached to the end of the table and covers the rails in their exposed projection beyond the table. In a table having two welding locations, a shield is attached at both ends of the table. The shields protect the rails against welding spatter, dust, etc., to keep the rails clean to insure maximum electrical contact.

Abstract: An automatic device for feeding and welding T-profile button studs to a surface is provided with a collet for retaining and aligning an individual stud in place adjacent a workpiece. The collet is formed of relatively thin sheet metal and is effective to properly orient the fastener relative to the workpiece surface while minimizing the occurence or arcing in the area between the collet and the arc shield.

Abstract: An electrode assembly for simultaneously welding all the leads of a semiconductor chip to an outer lead frame is disclosed. The electrode assembly includes a gross electrode opposed to a plurality of spot electrodes, and a plurality of parallelogram support members for the spot electrodes, and a housing. Each of the plurality of parallelogram support members includes a first leg fixedly attached to the housing and a second leg supporting one of the spot electrodes. Each of the second legs is resiliently deformable into a stressed position when the electrode supported thereby is biased against the work piece whereby each spot electrode is independently responsive to structural changes in the work piece and contact is maintained between the work piece and the spot electrodes during the entire welding operation.

Abstract: Guide tube for an arc welding gun. The normal threaded connection between the guide tube in an arc welding gun and the holder for same has been improved for the purposes of electrical transmission by utilizing tapered threading for same. Particularly it has been found that the electrical conductivity through said parts is substantially improved if such conical threading is of such design that the conicity of the thread is at a ratio of 1:16 .+-. 20 percent.

Abstract: A transformer for application in portable resistance welding machines assembled from toroidal sections of iron core, primary and secondary windings arranged concentrically one with another. The primary is constructed from copper plate modules so as to form a continuous single layer winding of toroidal form in which the separate modules are electron-beam welded one to another in order to form the continuous primary winding. A single turn secondary completely encloses the primary winding and iron core so as to form a compact cylindrical electrical transformer structure. A liquid electrical insulating material is sealed within narrow gaps between iron core, primary winding and secondary winding to allow good thermal transfer from these elements to a cooling medium and at the same time stabilize the relative position of these elements against the dynamic forces developed by the high currents passing through the secondary.

Abstract: An arc spray gun in which the ends of two metal wires, respectively connected to opposite terminals of a DC power source, are fed to an intersection point to strike and maintain an electric arc, melting the wires. A gas jet directed at the intersection point sprays the molten metal onto the object to be coated. The wire connected to the positive terminal of the power source is of larger diameter than the negative-terminal-connected wire. Parallel guides are provided for feeding the wires through hollow electrodes converging toward the arc-melting zone, the guide path of the larger wire being straighter than that of the smaller wire.

Abstract: A technique for the repair of selenium photoconductor elements is disclosed. The particular method includes applying a concentrated heat source to a damaged area of the photoconductor in an oscillating motion traverse to the damaged area so as to effect a weld of same. The oscillating motion of the heat source enables quick melting and resolidification of a minute area of selenium wihout undesirable recrystallization of the photoconductor.

Abstract: In the manufacture of hollow weld rods filled with particulate solids such as carbides, the rod ends are sealed with a solid material which has entered into the rod ends between the particles of filler and solidified into a film covering the rod end and filling the interstices of the filler material adjacent the end.

Abstract: The welding of studs by a drop technique is provided, including provisions for the rapid feeding of the studs to a chuck. In this type of welding, a stud is held a predetermined distance above a workpiece with an electrical potential established therebetween. The stud is held in a chuck which, in turn, is carried by a ram. The stud, the chuck, and the ram are allowed to drop the predetermined distance to the workpiece, at which time the stud becomes fused thereto. Weights are often applied to the ram and the distance of the stud above the workpiece can be varied to achieve a proper weld for a particular workpiece. Means are provided to rapidly supply studs to the chuck and include a chuck leg forming a loading passage and carrying the chuck at an end thereof. A feed passage communicates with the side of the loading passage and feeds studs thereinto from a remote supply source. A back-up plunger is affixed directly to the ram and extends into the loading passage of the chuck leg.

Abstract: A welding apparatus for welding together arcuate components, for example a platform and web of a brake shoe comprises a pair of opposed clamping members which are relatively movable to engage the web, one on each side thereof, over a substantial portion of the web surface area. The clamping members are continuously rotated by suitable drive arrangement. Preferably, two such pairs of clamping members are provided for clamping respective webs.

Abstract: A method and apparatus is described for coating or hard facing the working surface of a poppet valve, in which a uniformly distributed coating is obtained without dilution of the deposited metal, and without requiring preheating of the valve or its working surface. A non-consumable electrode and a consumable electrode or rod are held in position above the working surface of the valve, and an arc is struck between the tungsten electrode and the end of the rod, while avoiding contact of the arc with the working surface. As the rod is consumed by the arc, the valve is rotated about its axis and the drops of molten metal are uniformly distributed on the working surface, by the use of a magnetic field for controlling such distribution.A heat sink is used to dissipate any build up of heat in the area of the deposit.

Abstract: A welding assembly is provided wherein a nozzle body is pivoted about the weld head whereby the welding tip can be given fine adjustment by means of pivoting the nozzle body about the pivot point. A wire guide is provided which is quickly removable from the nozzle body for cleaning and/or replacing the wire guide. The welding tip, a tip adapter, and a tip nut may comprise a large mass of electrically conductive material. To obtain fine adjustment, the nozzle body, wire guide, welding tip, tip adapter and tip nut may be simultaneously pivoted about the weld head to move the welding tip relative to the work piece.

Abstract: An arc welding machine having a strap sliding to advance with advance of the welding position, wherein an electric conductor is disposed on the strap at a position not facing a welding groove with the electric conductor being insulated from the strap, and electric current being applied to the electric conductor while it is being cooled by water, to thereby control the arc direction.

Abstract: Flux-cored wire for automatic or semi-automatic arc welding process, comporting specific powder compositions as detailed in the description, which are high in amounts of metallic powders, mixed with metallic silicate solution to form a paste and baked before its introduction within a low-carbon or low-alloy steel sheath.

Abstract: System for laying pipe, wherein elongate flat sheets of metal are formed and welded to form pipe and wherein the pipe may be discharged for laying in a vertical direction or in a horizontal direction, or in any angular direction therebetween. The apparatus is mounted on a support vehicle or structure capable of traveling over water or land from which the pipe is discharged for laying.

Abstract: In the production of longitudinally welded pipes, the metal strip is treated with a chemical deoxidizing agent, such as a hydrazine compound, to remove oxides from at least the strip edges, prior to arc welding, to provide an improved weld.