Abstract: A threaded fastener is made by a method which involves forming a portion having an external thread form and a shank portion. The shank portion has at least one substantially circumferential groove the depth of which is such that the effective stress area thereby produced is less than the minimum effective stress area of the external thread form and is also such that yield of the threaded fastener occurs in use in the region of the or each groove at a predetermined load. The depth of the or each groove may be such that the diameter of the shank portion at the base of the or each groove is in accordance with the relationship: ##EQU1## where D is the diameter at the base of the or each groove (m).delta. is the tensile strength of the wire (N/m.sup.

Abstract: An improved wall fastener for hollow walls, the fastener having two spreadable anchoring blades designed to spread behind the wall following insertion of a screw thereinbetween. The fastener is made of thin sheet metal which has been hardened through a heat treating process, such as quenching. Complementary engaging means on the blades are used to hold the blades together during the heat treatment and to prevent the separation thereof until the screw insertion.

Abstract: A load control system and tool arrangements are disclosed for controlling the shutheight and back-up load on a mechanical press tool in response to a monitored or measured parameter indicative of press tool force or part quality, which monitored parameter is communicated to a controller for determination of a control signal to control a means for regulating the press tool back-up load and shutheight without interrupting press operations. The control system is operable to control a single station or multi station press and can be installed on either an individual press tool or the bolster or slide.

Abstract: A guide strip control device of pipe bending machine for controlling the transverse movement of a guide strip that is applied laterally against a pipe to be bent, which is held and moved longitudinally by a carriage. A first cylinder moves the guide strip over a considerable distance to disengage the pipe entirely from its gripping position and thus to allow the free passage of the carriage. A second cylinder moves the guide strip over a short distance so that the pipe is freed laterally but remains supported by a part of the guide strip.

Abstract: A bend arm is mounted on a base frame for turning movement. The bend arm is provided with a bend die and a work is clamped to the bend die by a clamp die. A drive arm is also mounted on the base frame for turning movement and is connected to the bend arm by a link. The bend arm is turned by the turn of the drive arm via the link and the work is bent by the turn of the bend arm on the model of the bend die. The distance from the center of turn of the drive arm to the connection point of the link to the drive arm is longer than that from the center of turn of the bend arm to the connection point of the link to the bend arm. Furthermore, the former distance is longer than the distance from the center of turn of the bend arm to the center of turn of the drive arm. Thus, the bend arm can be turned beyond 180.degree. by the turn of the drive arm by an angle less than 180.degree..

Abstract: The present invention relates to a warm rolling method for high Si steel strips, in which the steel strip is connected at both ends with leader strips which are excellent in cold or warm workability, and the ends of the leader strips are connected to tension reels for undertaking warm rolling on the steel strip. Whereby the leader strips are passed through rolls, the rolls can be preheated, and further whereby the both tension reels are disposed within warming furnaces and at least one of the leader strips is made longer than a distance between the tension reels, recovery treatment between passes can be carried out on the steel strip in the full length.

Abstract: The method of making copper rod by rolling is significantly improved by effectively controlling the water-soluble oil emulsion used to lubricate the rolls by employing a conductivity probe to maintain the conductivity of the emulsion within desired operating limits.

Abstract: Elongated straight cylindrical metal rods are threaded along opposite end portions, and the cylindrical outer surface of the center portion of each rod is marked to form a visual indicator of the longitudinal center of the rod. The straight rods are successively inserted into a rod bending machine having a mandrel with a mark indicating the center plane of the bending operation. The mid-point mark on each rod is aligned with the center plane mark on the machine, and the rod is bent to form a precision U-bolt. Preferably, the mark identifying the center of each rod extends circumferentially around the metal rod and is formed by a stripe of color contrasting ink directly on the rod or on a label attached to the rod to provide a permanent mark which does not require rotating the rod to find the mark.

Abstract: A system for controllng the feeding of wire to a workstation for the formation of a coil spring by means of at least one moveable work tool that is disposed at the workstation and that is selectively operated to move to different positions in the formation of a particular spring. The system includes a feed mechanism for feeding wire to the workstation and computer control means for controlling the feed mechanism to optimize the rate of spring making. The computer control means includes an entry means for setting predetermined characteristics regarding wire feed and work tool motion in constructing the particular spring. Work tool motion intervals are defined and the velocity of wire feed is maintained in a predetermined velocity range during the work tool motion interval, increasing in the velocity feed to a velocity greater than the predetermined velocity range outside of this work tool motion interval.

Abstract: A redraw apparatus is provided for a can body making apparatus wherein the redraw carriage of the redraw apparatus is mounted for substantially friction-free sliding reciprocating movement over a pair of spaced apart support posts which are fixed mounted on the housing holding the can forming and ironing dies. Also, the counterbalancing system is provided for applying a force to counterbalance the weight of a portion of structures used to reciprocate the redraw carriage. Additionally, a ram assembly is provided for supporting a ram for movement through the redraw apparatus and the can forming and ironing dies wherein a pair of spaced apart elongated shafts are fixedly mounted and a ram carriage having the ram attached thereto is provided with liquid bearings using liquid coolant comprising water having solubles contained therein for mounting the ram carriage on the elongated shafts for substantially friction free movement thereover. A guide liquid bearing is also used to ensure proper alignment of the ram.

Abstract: Two-function coil-forming assembly which cooperates with channels (14-15) feeding rolled stock and with at least one drum (20) forming coiled bundles and having an axis at least momentarily vertical and comprises at least two feeder units (25) having different individual functions (12-13), the assembly including a rotatable column (11) having a substantially vertical axis and able to take up at least two circumferential positions to support and position the feeder units (25), at least one of the feeder units (25) being momentarily in direct association with the drum (20) forming coiled bundles.

Abstract: A method of forming a tappet adjusting screw is disclosed herein. In this method, a wire material is cut to a predetermined length, the cut flaws at one end of the material are removed and simultaneously the end face of the other end of the material is provided with a linear groove. The end face of the first end of the material is processed to a convex spherical shape and this end of the material is reduced in diameter and a flange is formed about the convex spherical end face, this flange then being sheared off.

Abstract: A method of detecting spray header valve and nozzle malfunctions, in a spray header including plural nozzles each having its own control valve, by supplying the spray header with liquid at a constant pressure head through a conduit while opening and closing the nozzle valves one at a time, and measuring the flow rate through the conduit each time one of the valves is open and when all the valves are closed. In response to detection of a malfunction at a particular nozzle, the valves of one or more adjacent nozzles are adjusted so that the adjacent-nozzle flow rates compensate for the malfunction, for example to maintain a desired cooling pattern across a surface being cooled by the spray header notwithstanding the malfunction at the particular nozzle.

Abstract: A method and apparatus for loading hollow workpieces into a pilgering mill. The pilgering mill includes a reciprocating roll stand having a pair of metal forming rolls, a mandrel for insertion into a workpiece, and a mechanism for clamping the workpiece with various degrees of pressure. During loading and unloading of the mill, the workpiece is restricted from movement within the pilgering mill according to the various pressures applied to the workpiece by the clamping mechanism.

Abstract: In a thread milling cutter comprising at its tip cutting edges for making a bore, said cutting edges are formed as face milling cutting edges which enclose a mutual angle of 180.degree. or more, so that the thread milling cutter on reaching the intended drill hole depth and in order to be laterally moved need not first be raised. Also, it is possible with the thread milling cutter according to the invention when using said cutter to make threads of any desired diameter with the same thread pitch because the tool tip does not run against the drill hole bottom when laterally moved or offset as with the known thread milling cutter.In addition it is possible with the same tool to provide the thread at the entry with an edge-chamfer in such a manner that impairment thereof by formation of burrs is impossible.

Abstract: Apparatus for the fabrication of rechargeable battery cores formed of component layers of electrically conductive layers and inter-leafed electrically insulating layers in a coil-like manner comprising an arbor rotatable about its axis for the receipt and support of the core component layers and for winding such core component layers thereon; associated support roller means located adjacent to the arbor for forming a nip and for feeding the component layers to and around the arbor; tray means positioned adjacent to the arbor and support roller means to feed the component layers to the nip and around the arbor; and a tucker bar operatively associated with the arbor and support roller means adapted to move the leading edge of the insulating component layers for being rotated around the arbor prior to the feeding of the conductive component layers. Also disclosed is the method of fabricating rechargeable battery cores.

Abstract: A prelubricated finstock is described for making heat exchanger fins. The lubricant is water-soluble so that it can be removed from the heat exchanger fins by aqueous means. According to the process, a coating of the water-soluble lubricant is applied to a continuous strip of aluminum alloy finstock. This coating is dried and the coated strip is coiled for shipping and storage. When used, the prelubricated finstock is uncoiled and passed through a finpress to form the heat exchange fins. The lubricant is removed from the fins by aqueous means at any stage after the finpress.

Abstract: A threading device which can cut a uniform and symmetrical screw thread in the outer surface of a round bar or tube includes a die nut having internal cutting threads and two axial holes and a guide ring which includes two axial roll pins extending away from a rear face thereof and which are capable of extending into the axial holes in the die nut without play to align the axis of the guide ring with the axis of the die nut. The guide ring will act to maintain the axis of the die nut coaxial with the axis of a round bar or tube which extends through the bore of the guide ring and contacts the cutting threads in the die nut. The die nut (together with the guide ring) can be manually rotated to cut a screw thread in a round bar or tube by means of a conventional wrench.

Abstract: An apparatus for forming and slitting spirally formed pipe, particularly spiral pipes having a diameter of approximately one inch or less, is disclosed. The pipe forming apparatus includes an enclosed forming head and a mandrel. A continuous strip of metal is driven around the mandrel and inside a lateral bore in the forming head in a helical manner. First and second rollers mounted in the forming head partially form a spiral lockseam. A third roller mounted in the upper portion of the forming head closes the spiral lockseam. The mandrel is both rotatable and pivotable. The device for slitting the spiral pipe into sections includes a first knife that is positioned inside the spiral pipe. This knife is mounted at the end of a rotatable boom, that extends through the mandrel and is positioned inside of the spiral pipe. A second rotatable knife is positioned outside of the pipe. A rotatable support roller is also positioned outside of the pipe, and opposite the outer knife.

Abstract: Apparatus for forming edgewise wound cores from a generally thin strip of ferromagnetic material has a mechanism for edgewise deforming the strip into a plurality of helical convolutions which are received in an axial stack thereof on an arbor. The arbor is movable through an opening in a carriage to deposit the axial stack on the carriage, and the axial stack is displaced from the carriage onto a conveyor when the carriage is moved into a position remote from the arbor and adjacent the conveyor.