Abstract: An easily assembled and disassembled die holder assembly of the wedge locking type is provided which tightly clamps a punch die in its pocket. A die-engaging wedge of the assembly has an angular protrusion bearing on a wall of a corresponding groove in a side of the die to clamp it downwardly in the die pocket upon take-up of a threaded fastener. A locking wedge acted on by the fastener bears on the die wedge, relative angles of the latter and the protrusion causing the protrusion to hold the die rigidly. Backing off the fastener permits a resilient member to free the die from the protrusion of the die-engaging wedge.

Abstract: A punch stripper for a multiple station high speed cold heading machine, such as a nut former, wherein the stripper is biased in the retraction direction and is advanced momentarily to strip the blank, being immediately withdrawn so that the working tip of the punch can be cooled during a substantial portion of the machine cycle. The stripper is advanced by means of a cam-actuated bell crank, and the stripper and punch are mounted for easy removal and replacement.

Abstract: Apparatus for re-forming a helical screw thread includes a carrier; opposed jaws to be received in thread defined grooves at opposite sides of the body forming the thread; one jaw carried in fixed position by the carrier; a shaft mounting the other jaw and defining an axis of rotation; and brake means on the carrier and adjustable to selectively prevent rotation of the shaft and other jaw after the latter has been received in a thread groove, so that the jaw relative positions may remain fixed during thread re-forming.

Abstract: A machine for producing points on the pilot end of a rotary fastener, the machine comprising a rotating dial for supporting an array of blank fasteners above a pair of dies. The blank fasteners are sequentially fed between the dies for pointing thereof. The dial is notched on its periphery to hold the blanks therein. The notches on the dial are acutely angled with respect to the axis of the dial and are secured thereagainst during the die pinching operation to prevent bending of the fasteners as they are pointed.

Abstract: In a method of forming tubes or pipes from a flat blank of a plastically deformable material, three spaced apart portions of the blank are first bent to the wanted curvature of the finished tube or pipe, so that two smaller unbent portions are obtained between the curved portions. Then, the blank is closed to essentially tubular form by means of forces acting on the curved portions, so that the principal deformation in connection with the closing is obtained in the unbent portions located between the curved portions.

Abstract: A method and apparatus for manufacturing metal pipe. The edges of a metal plate are bent up slightly, and the thus bent plate is then bent into a U-shape cross-section blank. The U-shape blank is finish-formed into an O-shaped blank with the longitudinal edges opposed to each other in a position for welding by placing one end of the U-shaped blank into at least one two-part die the parts of which are movable toward and away from each other.

Abstract: Articles made of ferrous, non-ferrous and light metals and alloys thereof, e.g., aluminum, beryllium, magnesium, molybdenum, steel, tantalum, titanium, tungsten, vanadium and zinc and their alloys, are pretreated before coating and surface finishing in an anhydrous, inert, aprotic liquid, and subsequently electroplated with aluminum, cadmium, indium or zinc in an aprotic organo-metal electrolyte essentially free of molecular oxygen and water and, optionally, additionally finished by anodizing, chemical oxidation or diffusion. The pretreatment may be by erosion with finely-divided abrasive particles suspended in such liquid and impinged upon the surface of the article by hydraulic jetting, or with an aprotic liquid by the liquid-drop erosion method. Alternatively, the pretreatment may be by electrolytic action in a circuit where the article serves as the anode and is immersed in an anhydrous, aprotic electrolyte.

Abstract: The invention relates to machines, for the manufacture of springs, of the type which produce springs with a hook in a plane passing through the axis of said spring at one end, and a hook lying in the extension of the last turn of the spiral at the other end. The improvement is that means are provided for transferring the roughed-out spring in front of a device, for straightening the second hook, which is angularly displaced in relation to the machine, the transfer being effected by an axial movement of the blank, followed by rotation, and ending with a further axial movement.

Abstract: An ejector mechanism associated with the punch or punches in a header, operable to free the work blank from the punch after a heading blow so that the blank may remain in the die for a further forming blow, the mechanism including timing means to insure actuation of the ejector at the moment when the punch starts its withdrawal movement, as well as clearing of the ejector to prevent transmission of a load to the ejector mechanism on the heading blow.

Abstract: The invention relates to a bending or helix-forming apparatus operating by partial but continuous rolling of a long product on a resilient rim portion of a driven rotatable drum, to which portion it is applied by a plurality of rollers having axes parallel to that of the drum, with a pressure sufficient such that its adherence to the said resilient rim portion of the drum ensures that it is positively driven by the latter.

Abstract: An apparatus for picking up one or several flexible annular parts such as an endless rubber belts from a random stack thereof, and for separating, during a conveyance of the picked up parts, into independent pieces. As the parts are successively conveyed to a feeding position a plurality of claws are inserted into the earliest part so as to stretch the part radially outwardly and hold the part in the stretched condition. The claws then convey the part to a fitting position with the claws then releasing the part from the stretched condition and transferring it to the article, thereby fitting the flexible annular part around the article.

Abstract: A wire-fastening mechanism has a wire shaping and guiding device and a pivoted hook-shaped needle which co-operate together to fasten a wire to a connector lug by forming a cross loop of wire through a triangular formation of apertures in the lug. The wire shaping and guiding device has two opposed members between which the lug is inserted. Wire guiding grooves are provided in the opposed members to define one and a half turns of a helical channel around which wire is pushed to thread the aperture lugs as the wire passes between wire guiding grooves of the opposed members. The hook-shaped needle receives the leading end of the wire after it has passed through the triangular formation of apertures. Pivoting of the needle draws the leading wire end beneath a run of the wire between two of the apertures thereby to form a cross loop of wire.

Abstract: A slide fastener and method and apparatus for making the same is disclosed wherein the slide fastener chain includes a pair of carrier tapes with interlocking elements on adjacent edges thereof and portions of the tapes are compacted to constitute strips or bands arresting fiber slippage of the tape fabrics.

Abstract: The method includes positioning a plurality of rotary milling saw stations about a path of travel for successsive screw blanks. Two longitudinally overlapping fluting cuts are made on each side of each blank to configure a drilling point. The blanks are rotated about their axis a predetermined amount, during travel between work stations, to expose the appropriate peripheral surface of the blank to the appropriate work station. The method and apparatus described in the invention is capable of producing a drill screw with relatively long flutes behind the cutting edges while not appreciably weakening the point structure. The turret carrying the blanks is intermittently indexed in timed relationship with the activation of the milling saw, the work stations and means to clamp the blanks at the work stations.

Abstract: To fabricate a bent assembly of two metal tubes with one extending through and radially spaced within the other, the bending is done by inserting the smaller through the larger tube producing a tubular work assembly, clamping a leading work portion onto a bending forming die with the inner tube eccentric in the region to be bent against the die-adjacent inner wall portion of the outer tube, bending the region trailing the clamped portion by wrapping onto the bending die, while at (and immediately preceding) the point of feed onto the die the tubes are supported against collapse by a cylindrical mandrel in the smaller tube and a mandrel of crescent cross-section interposed between the large and small tube, in the plane of bending providing reaction support by a slideshoe bearing against the outer tube diametrically remote from the die; the mandrels being axially shiftably supported.

Abstract: The method and machine for forming a hollow rivet having a head at one end and an axially recessed shank at the other end, by means of placing a blank in a fixed die and performing the extruding operation on one end of the blank followed by a heading operation on the other end of the blank by a single blow of the heading hammer and then ejecting the hollow headed rivet from the fixed die.

Abstract: A vibration resistant threaded fastener such as a set screw and method of forming the fastener wherein the load bearing flank of the thread surface of the screw is provided with a series of serrations. Each serration is formed with an inclined ramp terminating in a buttress forming a skewed angle with the radius of the fastener. The ramp surface is inclined in the direction of tightening the fastener so that the buttress presents a surface tending to act against rotation of the fastener to preclude its loosening. In forming the vibration resistant fastener a pair of flat thread roll dies may be used. Each die is provided with a mating segment near the end of the effective thread forming portion of the die having a configuration designed to impart the ramp and buttress serrations on the load bearing flank of the fastener rolled between the dies.

Abstract: A cooling tube for cooling a hot rolled wire stock by cooling liquid is divided into a plurality of cooling sections by spaced apart partition members. Each partition member comprises a nozzle like rotary member having an axial passage for passing the wire stock. The inlet opening of the passage is circular having a diameter slightly larger than the major axis of the maximum oval cross-sectional configuration which is formed for the hot rolled wire stock when its size is changed, while the outlet opening is an oval having a major axis equal to the diameter of the inlet opening and a minor axis slightly larger than the diameter of the circular portion of the wire stock having the maximum diameter. The cross-sectional configuration of the passage gradually changes from the inlet opening to the outlet opening to prevent leakage of the cooling liquid.

Abstract: A method for manufacturing a self-locking spring nut is disclosed herein. In this method, a spring nut is tapped in its stretched or compressed condition, where a lead or pitch of the spring nut of a helical form is increased or decreased, say 0.5 to 6%. Accordingly, when a bolt is inserted into the spring nut thus prepared, then threads on the bolt undergo a compressive or tensile stress by the spring nut.As a result, the spring nut may be locked on a bolt in any position. This method utilizes an elasticity of the spring nut to be locked on the bolt, rather than interference between the female and the male threads on the nut and bolt, respectively, for instance, interference caused by deforming the configuration of threads or changing a pitch of a male thread relative to that of a female thread. Accordingly, the self-locking nut of the invention may be repeatedly used, without being damaged.

Abstract: A tool that is particularly suitable for the installation of objects that require tensioning and severing. A tensioning member is operated through a toggle linkage that collapses when a pre-determined level of tensioning is reached and actuates a cutoff lever. The result is severence of the tensioned object with reduced shock loading. In addition the tool is easy to operate; the tensioning level is accurately and reliably adjustable; and the severed object is controllably ejected from the tool.