Abstract: The invention is a device for attaching or removing electronic components from a substrate and includes a nozzle for delivering heat to the terminal areas of the substrate. The nozzle includes a first plate, spaced from the component, having openings corresponding to the terminals of the component. The nozzle further includes a second portion below the plate for directing heated fluid to the component. Further, at least one opening in the plate is enlarged to delivery more heat to certain terminals connected to a ground plate, for example.

Abstract: A method for treating a single side surface of a metallic strip, such as a steel strip, by soldering a pair of metallic strips back-to-back along their corresponding edges, preferably inserting a metallic edge insert strips between the two metallic strips at their joined edges. After appropriate treatment of the exposed surfaces of the sandwiched strips, such as dipping in a molten metallic bath, the metallic strips are separated by heating above the melting point of the solder, and peeling the metallic strips away from each other.

Abstract: A method is provided of temporary assembling by soldering of peel off plates through soldering material and a flexible junction element for a mechanical release device to release two parts temporarily fixed edgewise by peeling off the flexible element and the soldering material. There is provided on the plates and flexible junction element reserved areas without any adherence to the soldering material, and preferably at the limits of said reserved areas, a recess for removing any excess of soldering material, and the melting solder material is put under load for distributing it between the plates and the flexible junction element. A so obtained assembly can be applied particularly to obtain automatic opening of containers in particular in space for spreading out solar panels.

Abstract: An anode cylinder of a magnetron is formed of a rectangular copper plate member. The plate member is curved in a rolling process to be formed into a cylindrical primary workpiece. In a first cold extrusion process, the primary workpiece is forced successively into a first die having an inner diameter shorter than the outer diameter of the primary workpiece and a second die having an inner diameter shorter than that of the first die and arranged in line with the first die. Thus, the primary workpiece is continuously reduced in its outer diameter to be formed into a secondary workpiece. The thickness reduction rate of the primary workpiece used during its passage through each of the first and second dies is limited to 3% or less. The secondary workpiece has its unnecessary portions removed in a cutting process and its seam filled up airtightly in an airtight bonding process.

Abstract: An apparatus and method for fixedly positioning a rotationally symmetrical constructional part having an irregular longitudinal peripheral wall consisting of a plurality of spirally wound juxtaposed tubes. The apparatus comprises a rotatable core having a peripheral surface corresponding to the inner contour of the peripheral wall for supporting the tubes with means for rotating the core about the axis of symmetry. Clamping devices are included for fixedly positioning the ends of the tubes on the core. A wire wrapping device is positioned alongside the core for applying a removable temporary wire wrapping of non-circular wire cross-section under tensile stress to the surface of the tubes.

Abstract: A replaceable inspection plug assembly and method for its use with pressure vessels. The plug assembly comprises a collar seal welded onto a pressure vessel outer wall, and a threaded plug removably threaded into the collar and the vessel wall. The plug has a shoulder portion which is seal welded to the collar. For removal of the plug, the seal weld is first machined away using a special cup-shaped rotary machining tool. The plug is then cooled and contracted relative to the collar, and is then unscrewed and removed. Following inspection of the vessel interior, the plug is replaced in the threaded hole and the plug shoulder portion is rewelded to the collar to provide a structurally-rigid and leak-tight joint without need for subsequent stress relieving the welded joint.

Abstract: A method of making a plurality of masks for a mask-focusing color picture tube is described. A plurality of apertured flat masks are aligned and stacked. The stacked flat masks are contacted by magnetic force and welded together. The welded flat masks are pressed into a predetermined curved shape at the same time. Next, the welded portions are cut off to separate each mask.

Abstract: An apparatus which performs both the joining and the separating of juxtaposed strips to be coated including a stretcher leveller with two seam welders positioned between the entry and exit bridle rolls. Such an arrangement permits continuous stretch leveling of the juxtaposed strips during welding.

Abstract: A reworking tool for ceramic substrate hybrid circuits has a metal base for sitting on a heated surface, a support member support above the base and a pillar of heat conductive material attached to the base and extending up through an aperture in the support member. The top surfaces of pillar and support member are in a common plane. By this means a "hot spot" is produced at the top of the pillar and a hybrid circuit positioned on the support member can be so positioned that a particular component position is resting on the top of the pillar. Solder at this component position will melt and a component can be removed, or a component added or a component removed and another placed in position. Lateral sliding of the hybrid circuit laterally on the support member enables the solder to solidify.

Abstract: A device for desoldering electronic components from circuit boards has a soldering nozzle which produces a solder wave that is directed from below the circuit board against the component to be desoldered; thereby dissolving previous solder bonds. The component can then be lifted out from above and suction is applied from below to the now-opened bores of the circuit board, to remove residual solder from them. A new component can then be installed, using the same equipment.

Abstract: An electrode assembly comprising an electroconductive support, an electrode body, and a flange extending from the body with a plurality of tabs. The flange is attached to the electroconductive support by fastening some but not all of the tabs to the support. This permits removal of the electrode by separating the electrode body from the tabs attached to the support. The electrode is reinstalled by fastening at least one of the remaining tabs to the support.

Abstract: A solder reflow assembly technique wherein a substrate with solder pattern is immersed in a hot bath; after reflow of the solder, elements having a solder pattern therein are individually positioned on the substrate solder pattern; and the elements are aligned on the substrate by the surface tension created by the capillary action of the molten solder.

Abstract: The disclosure concerns a procedure for replacing a worn bolster ring on a freight car truck bolster which utilizes a motorized circle cutting and welding machine which rests upon the bolster and is centered by supporting structure positioned by locating pins which engage two pairs of mounting holes for the side bearing cages. The worn ring is cut from the bolster by a cutting torch driven around the circumference of the ring by the motorized machine. Then, the replacement ring is placed on the cut bolster surface, centered with respect to the axis of the motorized machine and tack welded, and finally welded to the bolster by a welding head which traverses the inner and outer peripheral surfaces of the ring under the control of the motorized machine.

Abstract: Components such as IC's mounted on a substrate such as a PCB are removed from the PCB in a heating apparatus. The heating apparatus has a mounting frame which positions the PCB above an array of infra red heating sources. The method includes the steps of bombarding the PCB with infra red energy which is absorbed and conducted to the solder joints to melt the solder to permit extraction of the components.

Abstract: A method for manufacturing a turbine rotor assembly from dissimilar materials to produce a hybrid composite rotor including the steps of: preforming a hub disc of a controlled outer diameter and prefabricating a ring of airfoils including a machine slotted fixture ring of mild steel slotted to receive airfoils inserted therein; and wherein the method further includes the steps of grinding the internal diameter of the mild steel ring to expose the airfoil bases to locate them at a radius line which will correspond to the outer diameter of the hub disc rim to maintain a pressure fit relationship therebetween when the ring of airfoils is pressed or shrunk on the outer diameter of the disc and thereafter sealing exterior joint lines between the mild steel fixture ring, airfoils and hub disc to form a pressure sealed surface on the exterior of the joined parts; subjecting the full outer planar extent of the pressure sealed configuration to an elevated pressure while maintaining it under an elevated temperature to

Abstract: A seal-welded pipe joint mechanically braced by a clamp for preferred use in handling toxic and radioactive materials is disclosed together with a process for joining the same. The joint comprises a pair of abutted male frustroconical skirts, each attached integrally to the pipe segments to be joined and confronting each other at opposed mating and finished surfaces which define a sunken ridge at their periphery. A uniform continuous seal weld of relatively slight penetration seals the opposed mating and finished surfaces at the ridge. The pipe joint is physically secured by a plurality of, for example, three female frustroconical segments forming a circumscribing collet which is circumferentially clamped to the skirt. When the collet is clampd over the abutted skirts with seal weld there between, the mating and finished surfaces are compressd together, relieving the seal weld of shearing and normal stresses.

Abstract: A method and apparatus are provided for replacing a commutator on a starter armature in which radially extending, circumferentially spaced commutator contact wires are interspaced between and soldered to mating contact wires on the armature. A heated platen includes at least one receiving hole through which the commutator is placed so that the soldered connection between the commutator and armature contact wires rests against the platen to thereby melt and remove the solder. The commutator is secured in a chuck while the armature is driven away from the stationary commutator. Thereafter, a novel tool spreads the rotor contact wires radially outwardly which permits a subsequent and new commutator to be positioned over the armature shaft so that the new commutator contact wires are interspaced between the armature contact wires. The contact wires between the new commutator and the armature are then soldered together by dipping the assembly into a solder pot heated by the platen.

Abstract: A welded joint between two telescoped and threaded together inner and outer parts of an assembly wherein the joint may be cut apart to permit unthreading of the one part from the other and for their subsequent reuse after repair or cleaning of the assembly. The inner part has an external thread and has a cylindrical portion between the external thread and the welded joint for expanding any inwardly projecting burr that may be formed on the outer part during the cutting operation so that the burr may pass over the external threads without damaging the same when the parts are unthreaded from each other. The invention is particularly adaptable for use with fuel injection nozzles but has use in other applications where welded together threaded parts are subject to disassembly and reuse.

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: Apparatus for removing and replacing dual in-line solid state circuit chip devices and/or receptacles or sockets from printed wiring or circuit (PC) boards comprising means for positioning a printed wiring board adjacent to a source of radiant energy capable of soldering and desoldering said devices, means for automatically, cyclically extracting a device from said board and replacing said device with another similar device, means forceably removing the excess solder residue retained by the board when the device is extracted, means for automatically timing both the device extraction and insertion and the soldering and desoldering operation, and means preventing device extraction should the desoldering operation fail to release the device from the PC board.

Abstract: A method of butt welding two adjoining plates is disclosed. The method includes welding the two plates together in a single pass, cutting a gap in the center of the first weld leaving first weld material on the two adjoining surfaces, and then rewelding the gap between the two adjoining surfaces of first weld material ensuring the reweld only occurs on the first weld material. This method has the advantage of heat treating the heat affected zone (HAZ) of the parent material adjacent the weld to prevent adverse metallurgical effect on the metal.

Abstract: The specification and drawings disclose a method and apparatus for rolling plural metal strips simultaneously to form thinner metal strip or foil. The method allows use of larger diameter rolls and simpler roll supporting structure and mill controls than heretofore possible in foil forming. The disclosed method contemplates the provision of a plurality of metal strips which are then bonded together in juxtaposed relationship with a thin layer of matrix material which substantially completely covers the opposed faces of the strips to form a composite comprising alternate layers of metal strip and matrix material. Thereafter the composite is rolled to reduce the strips to the desired thickness. Subsequently, the bond between the strips is destroyed and the strips are separated. According to certain embodiments, strong or low ductility metals can be formed into foils by bonding them in the central portion of the composite. Weaker or more ductile metals form the outer portions of the composite.