Abstract: The device comprises a welding unit with a tube (3), a laser radiation unit (1) radiating in direction of the tube axis (3.0), and a mandrel (4) which is connected to the tube (3) via a holding unit which is formed, e.g., by two spacer elements (5.1) and which is coaxially arranged relative to and in the tube (3). The tube (3) and the circumferential surface of the mandrel (4) are reflective of the laser radiation of the laser radiation unit (1) such that through multiple reflections between the tube (3) and the mandrel (4) the laser radiation is deflected toward the beam output-side tube end (3.2) and is shaped annularly.

Abstract: A copper alloy element wire 1 has a chemical composition including: 0.45 mass % or more and 2.0 mass % or less, in total, of at least one additive element selected from the group consisting of Fe, Ti, Sn, Ag, Mg, Zn, Cr and P; in mass ppm, 10 ppm or less of H content, and the balance being Cu and unavoidable impurities. A copper alloy stranded wire 2 includes a plurality of the copper alloy element wires 1 twisted together. An automotive electric wire 5 includes the copper alloy stranded wire 2 and an insulator 3 that covers the outer periphery of the copper alloy stranded wire 2.

Abstract: An oscillatory apparatus and methods of utilizing the same. In one embodiment, the apparatus comprises a force sensor having a proof mass, with one or more sensing electron tunneling electrodes disposed thereon, and a frame comprising one or more reference electron tunneling electrodes. Conductive plates disposed on the sensor base and capping wafers induce oscillations of the proof mass. The sensing and the reference electrode pairs are disposed in a face-to-face configuration, thus forming a digital switch characterized by one or more closed states. In the closed state, the switch generates triggering events, thereby enabling the sensing apparatus to generate a digital output indicative of the mass position. The time period between consecutive trigger events is used to obtain mass deflection due to external forcing. Time separation between the triggering events is based on the physical dimensions established during fabrication, thus not requiring ongoing sensor calibration.

Abstract: A door latching or locking mechanism or module for a self-cleaning oven includes latching linkage of the door latch module that enables use of lighter duty, less expensive motor. The mechanical advantage and vector optimization of the latching linkage avoids stalling especially from a locked position. The latching mechanism includes a plurality of switches having a corresponding plurality of terminals. The terminals are grouped or ganged to allow connection with a single connector interface. The switches are selectively actuable/de-actuable by a cam and cam plate that utilizes linear motion translated from rotational motion of a driven (motor) to selectively actuate and/or de-actuate the switches.

Abstract: A percussive arc welding apparatus includes a generally cylindrical actuator body having front and rear end portions and defining an internal recess. The front end of the body includes an opening. A solenoid assembly is provided in the rear end portion in the internal recess of the body, and an actuator shaft assembly is provided in the front end portion in the internal recess of the actuator body. The actuator shaft assembly includes a generally cylindrical actuator block having first and second end portions, and an actuator shaft having a front end extending through the opening in the actuator body, and the rear end connected to the first end portion of the actuator block. The second end portion of the actuator block is in operational engagement with the solenoid shaft by a non-rigid connection to reduce the adverse rebound effects of the actuator shaft. A generally transversely extending pin is rigidly secured to the rear end of the shaft.

Abstract: A guide pin comprising a metal core and a generally smooth, non-porous insulative ceramic layer disposed on the metal core. An intermediate layer comprising titanium-carbonitride (TiCN) may be disposed on the metal core, thereby improving bonding of the ceramic layer to the guide pin assembly. In an important feature, the insulative layer is generally nonporous and has high hardness, and thus exhibits excellent wear resistance. The intermediate and insulative layers are deposited by a chemical vapor deposition process known as the “Bernex” process that results in a very hard, generally nonporous coating.

Abstract: An induction heating head includes a length of wire having first and second opposite ends and being wound in a flat spiral shape to form an induction coil, a capacitor connected to the first and second ends of the wire, the induction coil and capacitor defining a tank circuit, and a flexible, elastomeric body molded to encase the induction coil. When a susceptor is placed in juxtaposition to the body, and the tank circuit is powered, the susceptor is inductively heated.

Abstract: A method and article for microwave bonding of thermoplastic pipe such as that used in the distribution of natural gas. The article is a composite bonding material (CBM) having a thermoplastic matrix (preferably polyethylene) which is miscible with the thermoplastic material of the pipe, and a plurality of microwave susceptor particles dispersed throughout the matrix. The preferred susceptors have improved heating properties whereby the total amount of metal oxide material in the CBM is about 1/10 of 1% by weight. A strip or sleeve is fashioned from the CBM and may be used, with or without a coupling, to join two pipes or repair ruptures. The method includes positioning of the article at the pipe joint or rupture, and application of microwave energy in an amount sufficient to heat the susceptors and cause both the CBM matrix and the adjacent portion of the pipe to melt and flow together, thereby producing a fusion bond.

Abstract: A method and an apparatus for friction welding two elements together are disclosed in which the areas of the two elements to be welded are heated by an induction heater. The induction heater may be used to heat the areas to be welded prior to contact between the elements, during such contact, and after the friction welding has been achieved in order to provide a heat treatment of the welded zone. The induction heater is generally annular in shape and may be dimensioned so as to be located around the elements at the welding zone, or to be placed between the surfaces of the elements to be welded together.

Abstract: A method of producing a heat recoverable plastic article such as a tube by deforming the article from a heat-stable configuration to a heat-unstable configuration. The heat-unstable configuration will return to the heat-stable configuration when the article is heated to above the heat recovery temperature. The article is heated such that the article is at a temperature no lower than the heat recovery temperature during the deforming step by lossy particles dispersed in the article or in a tool used in the deforming step. The lossy particles allow auto-regulated heating of the article since the particles cannot be heated beyond their Curie transition temperature when subjected to an alternating magnetic field. These particles are preferably ferrites. Alternatively, the tool can include a braided mesh tubing of a ferromagnetic alloy wire.

Abstract: A process for consolidating a composite material comprising the steps of forming a workpiece including a matrix interspersed with fibers, supporting the workpiece by an electrically conductive support, inductively heating the support and thereby conductively heating the workpiece, and applying pressure to the heated workpiece.

Abstract: A high frequency welding system for tubular members applies high frequency current I to the gap for creating an alternating field. According to magnetic flux of the alternating field, an opposed current i is generated in a conductive portion of the welding apparatus. In close proximity, inductance is effected between the welding current I and the response current i. An output circuit is provided for generating high frequency current for establishing a welding heat with suppression of ripple current at the output. The welding processing is observed by a CCD camera which is in communication with an image processing portion for analyzing image data for determining welding conditions. A signal from the image processing portion is output to a monitoring portion which continuously monitors welding operation and activates an alarm if welding conditions exceed predetermined values.

Abstract: A self-regulating heater is provided by placing ferrite-type body member, which is highly lossy when exposed to a high frequency magnetic field and has a predetermined Curie temperature, on or around a central conductor which is connected or is adapted to be connected to a power source which provides high frequency alternating current to the conductor. The current passing through the central conductor produces a magnetic field around the conductor, which causes the ferrite-type body to be heated by internal losses to its Curie temperature. The heater self-regulates at the Curie temperature of the ferrite-type body. The power source is preferably a constant current, impedance matched power source. The ferrite-type body member can be ferromagnetic or ferrimagnetic. The ferrite-type body is preferably ferrimagnetic, such as ferrite beads, rings, and the like, which heat by hysteresis losses.

Abstract: This feed system comprises: feed device for feeding a part to be welded, which can be inserted into a hole of a work, to the vicinity of an electrode of a welder; chuck for removably chucking the part fed by the feed means; first transfer device for transferring the trailing end of the feed device to and from the chuck; a guide pin held capable of being transferred by the electrode for being inserted into the work when the work is to be positioned; second transfer device connected to the chuck for positioning the part, which is chucked by the chuck, concentrically of the guide pin of the electrode; and pusher transferred by the second transfer device for pushing the part, which is chucked concentrically of the guide pin by the chuck, to insert the part into the hole of the work.

Abstract: This invention provides a method for soldering using induction heating, which is accomplished by the use of lossy heating particles in or on the solder. The method of this invention provides direct heating of the solder itself through induction heating of the magnetic particles in an alternating magnetic field. The magnetic particles useful in this invention can be ferromagnetic particles or ferrimagnetic particles, preferably ferrites, which have a Curie temperature at least equal to the flow temperature of the solder. Selection of the magnetic lossy heating particles with the appropriate Curie temperature for the system in which the particles are being used provides a system in which the temperature is self-regulating when the alternating magnetic field is applied. This self-regulation feature prevents overheating of the solder in the articles being soldered.

Abstract: A self-regulating heater including a body of electrically non-conductive material, an induction coil embedded within the body, lossy heating particles dispersed within the body and connection terminals for supplying power to the induction coil. The lossy heating particles produce heat when subjected to an alternating magnetic field produced by the induction coil. The lossy heating particles have a Curie temperature approximately equal to a substantially constant auto-regulation temperature at which the body is heated. The connection terminals supply power to the induction coil so that the induction coil can produce an alternating magnetic field of sufficient intensity to cause the lossy heating particles to heat the body to the auto-regulation temperature.

Abstract: A heater preform comprised of a layer of magnetic material on a layer of nonmagnetic conductive metal comprises a self-regulating heater, and the heater preform is wrapped around or against a solder preform within a length of heat recoverable tubing. A conductor wire is inserted into one end of the tubing and a terminal solder tail into the other end; when radio frequency current is induced in the heater preform by a surrounding coil, the heater generates thermal energy melting the solder within the tubing, terminating the terminal to the wire, or two wires together. With sealant preforms at the ends of the tubing, the sealant preforms melt and the tubing shrinks to conform to the wire and terminal therewithin, sealing the termination simultaneously with forming the solder joint.

Abstract: A process is disclosed for use in the manufacture of a color cathode ray tube in which an in-process flat glass faceplate has on its inner face a centrally located phosphor screen. A metal color selection electrode support structure with an electrode-receiving surface is secured to the inner face of the faceplate on opposed sides of the screen. A foil color selection electrode composed of hardened metal is provided which has a surface for engaging the electrode-receiving surface of the support structure. The electrode-receiving surface of the support structure, and a surface of the electrode engaging the support structure, are preconditioned with filler metal means. The color selection electrode is expanded and the preconditioned surfaces are placed in conjunction. Heat is applied to the preconditioned surfaces by means effective to melt the filler metal means with minimal annealing of the hardened metal of the electrode.

Abstract: A manual percussive welding apparatus which has a fixed electrode and a movable electrode is provided with a means in the form of a stop that comes into contact with the moveable electrode assembly to prevent further downward movement of the movable electrode. The movable electrode is normally spring-loaded to be urged toward the fixed electrode and is held in cocked position by a latching means.

Abstract: A discharge device for magnetic-pulse working and welding of metals includes two working electrodes with an igniter electrode in the form of a slotted ring placed therebetween. One of the working electrodes has a current-carrying portion connected to a working portion of the working electrode and is T-shaped, while the second working electrode is separated from the first working electrode and arranged coaxially therewith, and represents a sleeve, one end of which faces the working portion of the electrode and is provided with projections on the outside and inside so as to form a developed working portion of the working electrode.

Abstract: A strap comprised of a layer of magnetic material on a layer of nonmagnetic conductive metal comprises a self-regulating heater, which is wrapped around a length of heat recoverable tubing disposed around a terminal being terminated to a conductor wire, or a pair of wires being spliced. When energized, the strap generates thermal energy melting solder of a preform within the tubing, terminating the terminal to the wire, or the two wires together, and sealing the termination simultaneously. A plurality of terminals in a connector housing include solder tails extending rearwardly from the housing so that respective wire ends may be placed therealong within solder preforms within heat recoverable tubing therearound. A strap comprising a self-regulating temperature source is wrapped around the array of solder tails and wire ends and is energized to solder the array and seal the terminations.

Abstract: Disclosed is a method for selective soldering of components by inductive heating. A ferromagnetic material is provided as part of the components so that an applied electromagnetic field will create sufficient heat to melt the solder. The Curie temperature of the material is chosen to be just above the melting temperature of the solder to regulate the amount of heating.

Abstract: Arrangement in connection with induction butt-welding of the aubstantially pipe- or bolt-shaped elements of metal, which are provided close to each other along substantially the same center axis, and which at their welding edges define a narrow gap or joint which are kept approximately constant during the heating phase. For the purpose of achieving an electromagnetic field which can be guided into the area of the joint for rendering a concentrated heating area at the welding edges, a combination of a coil provided around the narrow gap and adapted for being subjected to a voltage in the frequency range of approximately 50-5000 Hz, and a cover of ferro-magnetic material provided around the coil and serving to guide the electromagnetic field to the area of the welding joint.

Abstract: A butt welding method is disclosed, which comprises abutting a pair of steel sheets and welding the abutting surfaces by opposing electrodes while preventing gaps from developing between the widthwise outer portions of said steel sheets by suppressing rotational deformation of the abutting surfaces in the widthwise outer portions thereof.

Abstract: Method and apparatus for depositing metal on, and bonding it to, a metal part or parts, either to provide hard facing metal on the metal part or to produce a cast weld between the parts. In the method, the metal to be deposited is melted before depositing it by an induction coil supplied with high frequency electrical current. The metal part or parts are advanced toward a point where such metal is deposited, and in advance of such point, the surface of the metal part, or for welding, the surfaces of the metal parts to be joined, are heated to melting temperature by high frequency electrical current. The high frequency current is supplied to such surface or surfaces by the same induction coil, by a separate induction coil or by contacts engaging the metal part or parts.

Abstract: An automatic feed apparatus is provided for a fusion welding machine, in which metal components are welded together. The apparatus has an electrode holder for holding a pin and having a clamping lever for clamping the pin to an electrode. A feeding device feeds pins to the electrode holder. A feed control unit controls the feeding device so that pins are sent individually to the electrode holder. The electrode holder in turn is controlled by a holder control unit. The holder control unit causes the clamping lever to open to receive a pin, and optionally can also control the position at which the pin is clamped. The feed control unit and holder control unit are synchronized together. Thus, the feeding device is only actuated to send a pin to the electrode holder, when the holder control unit has opened the clamping lever.

Abstract: A method and apparatus for installing steel liner sleeves in the cylinder bores of an aluminum engine block comprises axially sliding the liner sleeves onto slide portions of respective mandrels, over an inductor coil on the free outer end of each mandrel. After axially moving the mandrels to insert their inductor coils into the cylinder bores and then energizing the coils to inductively heat the walls of the cylinder bores to a predetermined elevated temperature to expand the bores to a diameter sufficient to axially receive the liner sleeves therein with a snug sliding fit, the coils are de-energized and the liner sleeves then immediately axially slid along the mandrels to a position over the de-energized coils and within the annular coupling gap space between the coils and the bore walls, and into their axially inserted position within the heated cylinder bores, in which position they are maintained until the cylinder bore walls cool and contract to form a tight shrink fit around the liner sleeves.

Abstract: The method for bonding a wire of this invention comprises the steps of: positioning a metal ball or a wire on a material (to be bonded); applying a pressing force on the metal ball or the wire against the material (to be bonded) and deforming it; inducing eddy currents in the wire to generate heat energy, whereby elements of the wire and the material (to be bonded) are mutually diffused by means of the heat energy and the pressing force, and bonding is completed. The wire bonding apparatus of this invention comprises: a capillary tip having a through-hole which opens onto a end thereof and through which a wire is passed, the capillary tip pressing the wire against a material to be bonded by the end of the tip (flat face); an electromagnetic coil provided around the end of the capillary tip to surround the through-hole; and a power source for supplying a high-frequency current to the electromagnetic coil.

Abstract: A device and method for joining details by soldering or brazing preferably pipe-shaped articles by feeding solder through a nozzle to a tool and heating the tool by inductive heating to warm up the solder to a predetermined temperature for effecting the soldering or brazing operation. The nozzle is exposed to inductive heating thereby preheating the solder in the nozzle to a suitable temperature.

Abstract: Structure for and a method of resistance welding using an induction coupled power source. The structure of the invention comprises an electric coil wrapped around a flux concentrating core in close proximity to members to be welded together, a source of alternating electrical energy connected through the coil and means for applying pressure between the members to be welded. In accordance with the method of the invention the members to be welded are heated by at least one of an induced current and hysteresis loss and the heated members are then forged together by applying pressure thereon. The weld effected by the method of the invention may be either a spot weld or a continuous weld. Further in accordance with the structure of the invention the flux concentrating core may be on one or both sides of the materials to be welded and may be linear and perpendicular or at an angle to the members to be welded, or may be U-shaped or cup-shaped including a central post around which the coil is wrapped.

Abstract: A self-heating and self-soldering bus bar for use in many applications. The pins of the bus bar are quickly and directly heated to a predetermined autoregulated temperature without significantly raising the temperature of the body of the bus. Thusly a bus bar may be mounted while maintaining thermal balance and mechanical integrity of all work pieces. The present invention avoids the problems normally associated with excess thermal expansion experienced when a bus bar is heated incidental to the heating of its contact points. A majority of this incidental heating is eliminated by direct quick heating of the mounting pins.

Abstract: A projection welder including a guide pin adapted to be withdrawn, when welding is performed, into an electrode for performing welding. The guide pin is formed with a tapering surface portion which is positioned, when the guide pin is inserted in a threaded opening formed in a nut to be welded which adheres to a forward end of the electrode, against the edge of an entrance to the threaded opening.

Abstract: Contacts of a multipin connector may be soldered to leads of a board of the like by forming coatings of magnetic materials on each contact and locating the contacts between poles defined by an air gap of the magnetic core, each pole having a separate pair of opposed pole pieces disposed adjacent a pair of contacts whereby upon application of a constant a.c. current to a coil wound about the core the magnetic material is heated to a temperature approaching its Curie temperature whereby temperature regulation occurs.

Abstract: A device for alignment of cylindrical workpieces for magnetic-discharge welding is provided with external and internal aligning sleeves (2,3) installed in an induction heater (1) coaxially and overlapping each other; the external aligning sleeve (2) is made of a non-polarizable dielectric material and features a ledge (4) on the outer surface thereof so that it can be locked by one of the aligning disks (5); the internal aligning sleeve (3) is made of a non-magnetic material having low conductivity and provided, on the inner surface thereof, with step-like shaped through slots (7) and, on the outer surface thereof, with a ledge (6) limiting the depth to which the sleeve (3) can be introduced into the external aligning sleeve (2); the internal aligning sleeve (3) is locked in relation to the induction heater (1) by means of a second aligning disk (10) contiguous to the ledge (6).

Abstract: A lid to be bonded to provide a hermetic seal has bonded thereto a thermally autoregulating heater for activating a heat activated sealing and bonding material to produce the desired seal between the lid and box wherein the temperature is regulated to produce heat in a range that does not change delicate objects that may be heated in the box and wherein the energizing element of the heater may be removed or replaced at will.

Abstract: A fusion welder has a fixed electrode and mounted above the fixed electrode is a movable electrode. The movable electrode is normally spring loaded to be urged toward the fixed electrode and a latch means holds the movable electrode in a locked position. A capacitor charging circuit provides the necessary arc to establish a weld.

Abstract: A method is provided for manufacturing a clad tube comprising a metallic tube coated on the interior surface with a thermally deformable coating material, comprising:(a) coaxially positioning the metallic tube within a cylindrically formed induction coil;(b) coaxially positioning a tube of the coating material within the metallic tube;(c) applying a current to the induction coil such that the induction coil serves as a heater and heats the metallic tube which in turn radiantly heats the tube of coating material to a temperature sufficient to make the coating material deformable; and(d) applying pressure on the interior of the tube of coating material such that the softened tube of coating material deforms to contact and fuse with the interior surface of the metallic tube to form a clad tube. The coating material can be, for example, glass or a thermally deformable resin. Optionally, a magnetic tube can be inserted into the interior of the tube of coating material.

Abstract: The quality of a percussion weld is sensed by measuring and analyzing certain features of the weld current signature. Instantaneous current is measured by a Hall sensor and permits isolation of the welder from the monitoring system. Weld quality is strongly correlated to the time to vaporize the nib separating the parts, and the dwell time to forge the parts together after nib explosion. A weld is assumed defective if nib time is too short or dwell time is too long. These quality parameters may be supplemented by weld and forge timing, line voltage, and acoustic information; a weld is rejected if any of these are outside of acceptance limits. Experiments on the percussion welding of silver-cadmium oxide to brass show that cadmium-oxide is decomposed and expelled by the forge pressure and the joint is a silver to brass weld.

Abstract: A method and apparatus is disclosed for induction heating weldable surfaces and moving the heated surfaces together with sufficient force to upset the surfaces while in a substantially inert atmosphere for thereby welding the surfaces together. The apparatus includes a rotary bus bar joint for moving the induction coil between the weldable surfaces, and also includes a clamping mechanism for handling members having weldable surfaces of different sizes and shapes. A pair of separately controlled induction coils may be used with or without laminations for heating tubular or solid members to an upsetting temperature.

Abstract: A welding control circuit for induction heating of a pair of articles to a welding temperature and for pressing the heated articles together. A pair of induction coils are positioned in a gap between the portions of the articles to be heated and a pair of temperature sensors monitor the temperature of both articles and controls heating rates so both articles reach a welding temperature at approximately the same time. The temperature sensors provide signals which cause the coils to be retracted from the gap and cause the heated articles to be pressed together to form a welded pair. When similar articles are to be welded together a single coil can be used to provide induction currents which heat the articles.

Abstract: An adjustable length linear bus bar for conducting a current between an induction heating power supply and an induction heating coil. The bus bar includes a fixed bar having a channel formed along the length of the fixed bar and a movable bar having a portion formed to slidably fit inside the channel of the fixed bar. A hydraulic ram biases the slidable bar against the fixed bar to facilitate the transfer of current between the fixed and movable bars. A clam shell type of construction allows the inductor coil to be quickly moved into and out of a gap between a pair of articles being heated.

Abstract: Two metal plates 1a, 1b are projection welded together using a truncated conical projection 12 on a first one of the plates having a spherical end surface. The plates are pressed together through the projection, and a welding current pulse is applied which reaches a maximum value in less than 2 milli-seconds. The shape and dimensional limitations of the projection coupled with the high amplitude, short duration current spike result in a thin welding nugget 9 and prevent any thermal distortion of the outer plate surface due to localized overheating.

Abstract: Apparatus for overheating the edges of a preheated formed skelp for the purpose of butt welding the skelp into pipe or tube. Induction coil assembly consisting of two (2) series connected loops, with a main conductor of each loop positioned within a magnetic flux guide and positioned adjacent to the open edges of the C-shaped skelp and the return conductors of each loop arranged externally on opposite side of the flux guide, providing localized overheating of the edges of the skelp prior to welding.

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: The invention relates to a method for soldering a metal electrode to an electrically conductive silicon carbide ceramic element and to a silicon carbide ceramic element made in accordance with the method. Silicon is used as the solder which provides a good electrical connection and, as the solder has approximately the same coefficient of expansion as the ceramic element mechanical stress due to temperature changes is minimized.

Abstract: Two intaglio printing plates having a total length equal to the circumference of the cylindrical barrel (1) of a plate cylinder are prepared. The cylindrical barrel (1) is expanded radially, and on the portion of its surface corresponding to the first plate (4) to be attached an epoxy film is deposited. The first plate (4) is applied on the epoxy film in the exact position. On the remaining part of the cylindrical barrel (1) one or a plurality of metal sheets (5) are deposited for ensuring the continuity of the cylinder surface. The plate (4) to be attached is surrounded by a tightening ribbon (6) covering completely the plate (4). Heat is used for softening the epoxy film and the ribbon (16) is tightened by exerting tractive forces beginning from the center of the two ends of the ribbon and advancing towards the peripheral edges. The epoxy film is allowed to set, the ribbon (6) and the sheet or sheets (5) are removed.

Abstract: In a storage battery having a plurality of electrically insulating vertical partitions, the method of the invention comprises sandwiching each partition, successively, between a pair of terminals of lead or other easily fusible material of the so-called "tombstone" type, that is, of "L" shape in which the vertical or riser portion of one terminal has a horizontal pin which extends through a hole in the partition and through a hole in the riser portion of the other terminal. An insulating sheet and induction coil are placed against the end of the pin by a fusing apparatus which is provided with a pair of arms which are pivotally operated by a fluid cylinder, one arm carrying the above-mentioned coil and insulating sheet and the other acting as a pusher.

Abstract: A method of making intercell connections in a lead-acid storage battery. The battery has a plurality of pairs of vertical risers of lead or other readily feasible material, each pair sandwiching an electrically insulating vertical partition. The method comprises forming a horizontal hole in a partition, squeezing together such as by hydraulic cylinders, a pair of risers against its corresponding partition and applying coils energized by high frequency electrical current against the outer surfaces of the risers adjacent the hole and simultaneously squeezing together said pair of risers against its partition so as to fuse the riser material adjacent the hole and introduce it through and fill the hole. High quality readily reproducible intercell connections are thus formed successively throughout the battery.

Abstract: A device for evacuating, filling and closing final storage containers for radioactive materials mixed with molten glass, comprising a suction pipe connected to the container, a meltable closure for said pipe and a closable evacuation connection fitting mounted in said meltable closure. The container is evacuated through the fitting whereupon the fitting is sealed closed to preserve the vacuum. When the suction pipe is dipped into the molten glass to fill the container, the closure melts and with the glass is sucked into the container.In another form the device also includes a protective sleeve surrounding the fitting, closed at its outer end with a meltable plate which also serves as a heat radiation shield. The shield prevents premature melting of the meltable closure, i.e. melting from the heat in the glass furnace prior to immersion of the suction pipe in the molten glass.

Abstract: An electrically conductive path through an insulating plate (10) is produced by forcing sheets of conductive material (13, 14) into contact through a hole (11) in the plate (10). The sheets (13, 14) are forced together with sufficient force to produce a cold weld junction, which is then plated with a conductive metal (102). Dies for producing the cold weld utilize metallic spheres (110), rods (188) or chemically etched projections (228). Shaped dies (268, 272) form a crimped joint without a cold weld, and offset dies (246, 250) produce a raised junction (252) for use as a mount for a planar component. In manufacturing a printed circuit board (160) the cold weld die (158) is produced with the same drill hole pattern as used to form the drill holes in the printed circuit board (160).A force sufficient to cause metalurgical bonding of the opposed conductors may also be applied by an explosive discharge. A hole in the junction area of the opposed conductors may be created or enlarged by the use of a laser beam.