Abstract: In an apparatus for the butt welding of hollow molding of aluminum with two contact clamps (4, 5), movable toward each other, for the ends of the moldings to be joined together, one contact clamp (4) is fixed at the machine frame, and the other contact clamp (5) is arranged on a table (3) supported at the machine frame (18) by way of two parallelogram guide arm pairs (19, 20). Trough-like recesses (15) are provided in the mutually opposing end faces of the contact clamps (4, 5), a conduit for the feeding of protective gas during the welding operation terminating in the zone between the contact clamps (4, 5).

Abstract: A high frequency resistance welding system having a pair of jaws which are pivotally mounted together and are adapted to clampingly engage the work to be welded therebetween. Each jaw has two arms and each arm has a welding tip which engages the work. The welding tips on the arms on one jaw register with the welding tips on the arms on the other jaw. A high frequency alternating electric power source is connected to the first jaw so that the direction of current flow in one arm of the first jaw is opposite from the direction of current flow in the other arm of the first jaw so that the magnetic field caused by the current flow through one arm is substantially offset or cancelled by the current flow through the other arm of the first jaw. In addition, each welding arm is preferably L-shaped thus having an elongated shank with the welding tip at one end of the shank.

Abstract: The connecting member has a sleeve body and a resistance heating wire embedded therein with terminals to a power supply. By heating the resistance heating wire, a welding area between the sleeve member is plasticized and welded. For checking the weld quantity, an indicator is provided, which comprises a cavity having a piston with an indicator pin movable therein in the welding area. During welding the material which becomes plastic as a result of the welding pressure is forced into the cavity, so that the indicator pin covered prior to welding is forced out through a passage and is consequently visible and tangible. As the travel of the piston is limited by a cover at the end of the cavity and the distance from the bottom of the cavity to the welding area can be selected corresponding to the desired welding pressure, the end position of the exiting indicator pin corresponds to a temperature and pressure range necessary for completely satisfactory welding.

Abstract: The invention contemplates a host-torch body configuration for interchangeable use of a selected one of a variety of different welding-process heads. A bayonet-type locking engagement is quickly operable to connect or disconnect any selected process head. The arrangement is such that the same bayonet-lockable engagement serves electrical-supply, consumable-electrode supply, and gas-supply or gas-venting requirements of particular different welding-process heads.

Abstract: A double-glazed window frame comprising two parallel glass panes has an internal blind disposed between the glass panes in parallel therewith. The internal blind comprises a succession of collapsible elongated tubular volumes formed from a plurality of plastic strips; each plastic strip having a center section, an upper face, a lower face, an edge adjacent one of said glass panes and another edge adjacent the other of said glass panes; with the plastic strips alternately bonded to one another through the center section and through the two edges. Each plastic strip has a metallic layer deposited on each face thereof, and each metallic layer has a break in continuity between the edge adjacent one of the glass panes and the edge adjacent the other of the glass panes, whereby the coefficient of thermal insulation of the blind is improved.

Abstract: A SnO.sub.2 semiconductor gas sensor for use in a cooking apparatus to detect the cooking condition is manufactured through an aging treatment for stabilizing the operation of the SnO.sub.2 semiconductor gas sensor. In the aging treatment, the SnO.sub.2 semiconductor gas sensor is disposed in a gas ambience including a gas which is developed in the cooking apparatus. More specifically, the gas ambience includes a dimethyl siloxane gas which is developed from a heated silicone compound. The gas ambience in the aging treatment is held at a high temperature, for example, 150.degree. C. through 250.degree. C. to provide the SnO.sub.2 semiconductor gas sensor of which the resistance value and sensitivity are stable even in the high temperature ambience when oven cooking is performed by the cooking apparatus.

Abstract: An assembly apparatus for assemblying rings comprises a support (10, 11, 12); and a ring shank holding stud (20) connected to the support, the stud (20) including an electrically conductive portion for receiving a metallic ring shank thereon. An electrode (44) is coupled to the ring setting through a collet (52) which engages the ring setting, for supplying electrical current to the setting. A ring shank holder (14) fixedly holds the ring shank in a pre-determined position relative to the ring shank holding stud (20), whereby the ring shank and setting are held in a pre-determined fixed position relative to each other. Electrical current is supplied to the electrode (44) and to the ring shank holding stud (20) so that the electrical current passes through the setting and the ring shank so as to weld the setting to the ring shank.

Abstract: A coherent bond is formed for thin metallic sheets by hot press welding an auxiliary deformable material to the sheets to be bonded together. During application of a force to the deformable material, the oxide layer on the metallic structural elements is physically moved by the deformation of the auxiliary deformable material. In this manner, the auxiliary deformable material is directly bonded to clean metal and is built into the crystalline lattice structure of the thin metallic elements to thereby produce a coherent bond.

Abstract: Methods and apparatus for fusing elements such as wires to one another. The elements to be fused are engaged in a notch or channel in one electrode, so that a first element, typically a stranded wire, contacts this electrode and also contacts the other element. A second electrode is engaged with the first element, and a fusing current is applied to the first element so that heat generated in the first element heats the second element as well. Where the second element is an insulated wire, heat from the first element vaporizes the insulation. The fusing current is applied as a series of low voltage, high current pulses.

Abstract: A welding apparatus is disclosed for circular welding an outer surface or a bore surface of a metallic object. The apparatus consists of a rotatable spindle, a rotatable power connector connected to the spindle, and an offset adjustment device connecting the spindle to an orbital welding torch. A weld nozzle is provided at one end of the torch. A wire feed device is connected to the spindle. The welding apparatus is provided with a wire transmission conduit, a gas transmission conduit and an electrical power transmission conduit for guiding wire, gas and electrical power to the rotatable power connector, and on to the rotatable spindle and torch. A wire feed device is provided for feeding wire from a supply and the entire supply is mounted for rotation with the welding torch about the path of feed of the wire.

Abstract: A terminal pin of a coil bobbin has opposed sets of notches sized, shaped and spaced so as to permit magnet wire to be wrapped around the terminal pin in a spiral path defined by the notches. Because the magnet wire is received in the notches, the notches function to properly locate the wire on the pin and to maintain the wire stationary. The notches have a depth selected so that the portions of the magnet wire received in the notches are recessed below an outer surface of the pin, whereby electrodes used to fuse the magnet wire to the pin are allowed to contact the pin and thereby form a closed circuit. The resulting heat melts the insulation on the magnet wire to permit the fusing of the wire to the pin.

Abstract: A welding process for the manufacture of high carbon steel wire mesh for use in wire screens. In this process at least two high carbon steel wires are crossed and its junction pre-weld heated. The amount of heat applied at this pre-weld step is insufficient to cause wire fusion but sufficient to allow heat to disperse to adjacent areas of each wire. The wires are subsequently welded together and further heated by raising the temperature at the wire junction to a second temperature of at least about 1575.degree. F.

Abstract: A method for welding a wound core constituted by an amorphous ribbon which comprises the steps of bringing a pair of electrodes into contact with the surface of the outer end portion of the ribbon, and supplying an electric pulse to the pair of electrodes to instantaneously melt the above outer end portion and the underlying ribbon layer thereby welding them together without causing deterioration in the magnetic characteristics thereof.

Abstract: A gas shield chamber for enclosing a welding joint of a pair of rails during the arc welding of the welding joint. A pair of side backing plates are each held in contact with the groove at one side of the rails within the chamber and the side backing plates are respectively movable independently of each other by a pair of drives having manual-powered operation change-over means. The ratio of respective flow rates of each shielding gas from respective injectors into the chamber is varied in accordance with the movement of the side backing plates. A pair of ground terminals of a welding power source are arranged on the sides of the rails.

Abstract: A welding method forms a fiber reinforced weld in a fiber metal matrix composite. Novel weld rods or consumable electrodes for introducing the fibers to the molten weld pool are disclosed. Reinforcing fibers are added to a molten weld pool that is initially substantially free of fibers. The fibers strengthen the weld. The concentration of the fiber should be controlled so that the viscosity of the pool remains suitable for welding.

Abstract: A method of welding studs inclusive of a bolt or the like to an underwater structure or a land structure in the rain or for mounting anticorrosive members, wherein the tip of the stud held by the welding gun is enclosed by a resilient, heat-resisting water sealing member and a gas generating agent is applied to the tip of the stud. The water sealing member is brought in contact with a base metal and an arc is generated by a current across the stud and the base metal so that the arc heat causes gas to be generated from the gas generating agent to force any water around the stud tip out of the water sealing member under a gas pressure, and then the stud is welded to the base metal in the absence of water.

Abstract: A gas shielding arrangement and method is disclosed for use with tungsten inert gas (TIG) welding and the like, consisting of an inner, primary flow of an inert gas such as argon, passing about the electrode and weld area, and an outer radially spaced secondary flow of hydrogen gas, completely enveloping the flow of inert gas and ignited by the welding arc to provide a flow of burning hydrogen gas which consumes the atmospheric oxygen penetrating into the flow to minimize oxidizing of the weld metal. The flow of hydrogen gas also minimizes dissipation of the inert gas to conserve and improve its shielding effect. The heat generated by the burning hydrogen heats the portions of the workpiece surrounding the weld to produce superior welds with improved grain structure by minimizing the quenching effect of the weld created by conduction of the weld heat into the surrounding metal.

Abstract: The leak-tight welding of elongated joints, particularly of circular, interlocked joints, such as, for example, the fluid-tight welding of plugs on drums is achieved by folding over the edge (11), or the circular margins around a circular opening, of the sheet (1) onto which, e.g., a plug (27) or other workpiece is to be welded liquid-tightly, laying the workpiece against the folded-over edge (11), and then applying electrodes (28, 30) on opposite sides of the workpiece and sheet, with sufficient pressure that the folded-over sheet margin (11) is further deformed. In this way, the surface-parts not lying flat against each other at the contact-surface (35/32) of the workpiece and sheet margins are forced into accommodation and an even distribution of pressure along the contact-surface results. When the welding-current is switched on, the current density is essentially uniform throughout the contact-surface and hence a simultaneous welding along the entire contact-surface occurs, producing a a leak-tight joint.

Abstract: On a machine for welding together the longitudinal edges (12, 14) of rounded sheet-metal container body blanks there are disposed a plurality of rings (24) of rollers round a common longitudinal axis (22), one behind the other in the direction of passage through (A) of the blanks (10). At least some (28) of the rollers (26, 28) of the rings (24) of rollers are each mounted on a roller carrier (40) which is adjustable in the direction away from the longitudinal axis (22) against resilient resistance. The roller carriers (40) are guided in a manner which enables the associated rollers (28) to execute yielding movements at an angle of distinctly less than 90.degree. to the direction of passage through (A) of the blanks (10). For this purpose, the roller carriers (40) are each pivotable about a transverse pin (42) which is disposed at least substantially parallel to the associated roller spindle (38), upstream of this with respect to the direction of passage through (A) of the blanks (10).

Abstract: An electric-arc discharge device includes an annular gas-flow nozzle surrounding the discharge electrode, the nozzle being configured for discharging gas flows at trans-sonic to supersonic velocity, with circumferential uniformity of the gas flow around the axis of the electrode, and directed downstream to surround and radially inwardly confine and shape the arc. The trans-sonic speeds of gas discharge are the result of special annular gas-nozzle design and suitable pressure of gas supply thereto, whereby a region of criticality characterizes gas flow within the nozzle, i.e., prior to discharge at trans-sonic speeds, the discharge being around the electrode and with such thrusting momentum as to establish shaping confinement and directional stability of the region of electric-arc development.