Abstract: An anchor for secure reception of a fastener such as a screw shank can be frictionally welded, by high-speed rotation of the anchor, to the structure upon which the fastener is mounted. The anchor is molded from frictionally meltable material, for example a typical engineering thermoplastic such as ABS resin. The anchor has a generally cylindrical body with an end face at one end defining a surface for frictional welding to the compatible structure. The end face has an aperture which receives the screw shank or the like. The cylindrical body has a cup-like configuration having a cavity formed therein extending from the end face to an open end at the opposite end of the cylindrical body. A cylindrical boss is formed within the cavity and extends from the aperture at an entrance end for receiving the fastener. The boss has a frangible cap covering the end of its bore opposite the entrance end.

Abstract: A brake booster, in particular, a construction for strengthening the coupling between the brake booster and a master cylinder, is disclosed. The head of a bolt which extends through an enclosed shell is welded to the internal surface of the shell so as to maintain a hermetic seal, and a strengthening plate disposed around the bolt head is welded to the internal surface of the shell. Additionally, a reinforcing member fixedly connected to the strengthening plate is welded to the bolt head to improve the rigidity of the strengthening plate.

Abstract: The composite stud is mainly a corrosion-resistant alloy, but is provided with a steel tip for flawless welding to a steel plate for use in a marine environment. The steel tip is friction-welded to the corrosion-resistant alloy before machining of the stud.

Abstract: A strong transition joint between an aluminum plate and a steel object includes an aluminum sleeve adapted to be fusion-welded to the aluminum plate and a titanium core explosion-welded to the aluminum sleeve in the center thereof with the titanium core having an internally threaded hole adapted to receive a steel bolt so that the occurance and economic consequences of corrosion are minimized.

Abstract: A fastening system including a two-part laterally adjustable fastener comprised of an apertured base and a headed elongated member. The head of the member is captivated in a recess in the base as the base is welded to an article. Complementary surface formations are formed on the base and the article to facilitate positioning of the base on the article during a welding operation.

Abstract: A fastener plate is provided for use in securing together structural elements. The plate includes a base plate to which is ultrasonically welded at least one fastening element which may include, for example, an externally-threaded, stud-like fastening element, or an internally-threaded fastening element. A method for fabricating said plate is further described, said method comprising the steps of locating said at least one fastening element on said base plate and then ultrasonically welding said element to said base plate using an ultrasonic welder which includes a center aperture and which is adapted to effect a weld between the annular base portion of the fastening element and the base plate. In an alternative embodiment, at least one locking ring may be used to overlay the annular base portion with the weld being effected between the ring and the base portion.

Abstract: The invention includes a method and a fastener for use in attaching articles to printed circuit boards. The fastener, which has a generally tubular body, flanged at one end, is adapted to receive a screw. The fastener has a polygonal cross-section over a portion of its length. The flange which is located at one end of the tubular body, has an integral spring washer and includes indentations which allow solder to flow from one side of the printed circuit board to the other. The fastener with its integral spring washer provides improved clamping characteristics and avoids problems associated with large coefficients of thermal expansion of printed circuit board material in a direction perpendicular to the board.

Abstract: In a preferred embodiment, a metal nut compacted and welded within the thickness of a metal sheet, within a sheet-aperture of lesser diameter than a top of the nut, spaced-apart compacted edge portions of the nut's top having a larger diameter than the nut's top at other edge locations in the compacted state, and the sheet's malleable metal of bottom portions thereof adjacent the aperture being compacted against and welded to malleable metal of a circumscribing side wall of the nut.

Abstract: A spacing or shimming system for accurately securing a workpiece to a work-securing surface with a predetermined space between these two surfaces. A collapsible shim device includes a support securement surface and a workpiece supporting surface interconnected integrally by a selectively displaceable strut having a knee section which is particularly adapted to permit the workpiece supporting surface to become closer to the support securement surface upon significant compression. A further part of this system includes a self-drilling and threading fastener having a spacing or supporting washer.

Abstract: An improved method of manufacturing a vacuum booster housing for use in a brake system of an automotive vehicle where the brake master cylinder is secured to an annular wall portion of the body of the booster housing by means of bolts passing through holes in the annular wall portion. The method comprises forming annular projections on the seating faces of the heads of the bolts coaxial with the bolt shafts and on the inside surfaces of the annular wall portion coaxial with the holes, disposing a reinforcing plate between and in contact with the annular projections, and simultaneously projection welding the reinforcing plate to the inside surface of the annular wall portion and the seating face of the bolt head to the reinforcing plate.

Abstract: Disclosed are methods and apparatus for attaching a heat sink mounted semiconductor case to a circuit board employing a stud with a flange near one end. The longer shank is threaded and at least the shorter shank or head stud is tin-plated. The stud may be swaged into a mounting hole in the heat sink and the heat sink and semiconductor case pre-assembled. The pre-assembled unit may then be mounted and soldered to the circuit board along with other circuit components.

Abstract: A weld nut for use in securing a fastener to a sheet of supporting material. The weld nut comprises a triangular-shaped plate with truncated vertices. The plate has a mating surface from which are raised first, second and third integral projections. Each of the integral projections has a frusto-conical body with a rounded top and is surrounded by an annular channel to contain the flow of the material forming the projection when the nut is welded to the supporting material. Each channel preferably intersects an adjacent truncated end to permit the formation of an external fillet.