Abstract: Disclosed is a method and device for making a double-coned coil spring, which comprises using a semi-finished spring having formed upon one end thereof a first conically wound portion with the rest of the wound portion extending axially with a constant maximum diameter, and forming a second conically wound portion upon the free end of the cylindrically wound portion; wherein the cylindrically wound portion is clamped at the site from which formation of the second conically wound portion is to be started by means of a first clamping means, and the open end of the cylindrically wound portion is also clamped by means of a second clamping means; and the second clamping means is allowed to rotate in the direction of winding the semi-finished spring, while the second clamping means is forced to be moved radially inwardly toward the center of the semi-finished spring.

Abstract: A staged tool for boring a hole in a heated element of a material such as metal. The tool is adaptable to being axially forced and operation of the tool causes plastic deformation of the bored material. The tool successively includes, beginning at its front end, a front cylindrical or conical end portion having a first relatively small diameter, a neck followed by a working portion of evolving revolution having a right cross-section which increases in the direction of advancement of the tool, whose major base has a second diameter greater than the first diameter. To improve lubrication during boring, positioned on the neck at the rear of the front end portion is a mass of solid lubricant having a fusion point less than the temperature of the element during the piercing operation. The solid lubricant melts when the tool penetrates into the heated element and the contact surface between the element and the working element is constantly lubricated by a melted lubricating film.

Abstract: A screw threaded method of making fastener particularly intended for use in fastening corrugated sheet material to metal purlins comprises a drilling point (1), a head (2), a first self-tapping screw threaded portion (3) adjacent the drilling point (1), a second screw threaded portion (4) adjacent the head (2), the second screw threaded portion (4) having a larger crest diameter than the first screw threaded portion (3), and an unthreaded portion (5) extending between the first and second screw threaded portions. The diameter of the part of the fastener carrying the second screw threaded portion (4) is generally larger than that carrying the first screw threaded portion 3 and the fastener also includes a transition portion (6) between its portions of smaller and larger diameter, and in particular, interposed between the trailing edge portion of the first screw threaded portion (3) and the leading edge portion of the unthreaded portion (5). The transition portion (6) includes forming portions (8 FIG.

Abstract: A garter-type axially resilient coil spring includes a plurality of coils canted along a centerline thereof with each coil having a trailing portion and a leading portion. Specific resilient performance, or load-deflection characteristics, of the spring is obtained by interconnecting the coils in a manner such that the trailing portion is disposed along an outside diameter of the garter-type axially resilient coil spring and the leading portion is disposed along an inside diameter of the garter-type axially resilient coil spring.

Abstract: Treatment means for metal strip edges provide opposed carriages designed to simultaneously treat opposite edges with treatment tools. Rollers on the carriage are located to contact the edges of the strip on the same side as that carriages edge treatment tool and allow accurate positioning of the tools relative to the strip edges.

Abstract: Mandrel rod (1) for pipe rolling mills, in which hollow billet (5) is rolled on mandrel rod (1), consists of two pipes (2, 3) lying inside one another. Annular gap (4) between pipes (2, 3) is filled with a thermosetting plastic, whose coefficient of expansion is selected large enough so that the thermosetting plastic completely fills annular gap (4), even with temperature differences, between pipes (2, 3).

Abstract: A method and apparatus for automatically adjusting soluble oil flow rates to control physical properties of continuously rolled rod including a nozzle for spraying the rod with fluid, a tank for providing the fluid to the nozzle, a valve means in series with the tank for regulating the fluid flow to the nozzle, a controller means connected to and for controlling the valve to ensure that the fluid flow reaches a desired predetermined rate, a computer means connected to and providing said controller with the desired predetermined fluid flow rate, a flowmeter in series with the valve means for measuring the actual fluid flow rate to the nozzle and providing this information to the controller means so that, if necessary, the valve means may be adjusted to achieve the desired predetermined fluid flow rate and an historical data generating means for automatically adjusting said desired predetermined fluid flow rate in accordance with actual measurements of at least one physical property of the rod whose value depen

Abstract: Cold rolling metal strip with a rolling lubricant of petroleum solvent mixed with polyalkylene glycol. Where a sump collects said rolling lubricant after use for reuse in such rolling, also using mixtures of such components to lubricate parts of the rolling mill where leakage of the parts lubricants could be collected in the sump.

Abstract: A manually operated punch and die set for making washers accurately includes a die having a series of die openings graduated according to diameter, a series of punches having cutting faces complementary to and received in the die openings for manually severing discs from sheet material and leaving corresponding graduated openings therein, a plurality of the punches each having a shank-receiving bore in its cutting face, a series of pilots having heads graduated in diameter to correspond to the diameters of a like number of graduated sheet material openings, each of the pilots having a shank joined to its head and removably received in each bore, whereby a pilot may be mounted on a cutting face of greater diameter than the head of the pilot for manual insertion of the head into a sheet material opening of corresponding diameter to orient the opening with respect to the cutting face, for severing from the sheet material an annular washer encompassing the opening.

Abstract: A dynamic bone fixation screw for rejoining fracture fragments of a bone to their approximate original mutual dispostion. It includes a threaded distal end member for threaded engagment with one of the bone fragments and a head member at a proximal end for engagement with another of the bone fragments. A spring member integral with and extending between the distal end member and the head member enables a predetermined torque to be initially imparted to the bone. When stress relaxation in the bone occurs, the spring member relaxes accordingly while continuing to draw the bone fragments together. The bone screw is fabricated in a unique manner.

Abstract: A spring-making machine includes a plurality of forming tools reciprocatively sliding in a plurality of tool guides radially disposed on a panel so that a spring wire led through a central chuck of the machine will be automatically formed as diversified shapes or orientations of spring products by the forming tools for conveniently and efficiently making springs.

Abstract: The present invention relates to a device for manufacturing conical poles or conical pole members by roll forming sheet metal wherein said device (1) includes a conveyor path (5) along which sheet metal is transported, and a plurality of groups (10) of forming rolls (11, 12) positioned in succession along the conveyor path (5). In order to facilitate the roll forming and eliminate the risk of bending the sheet metal during the roll forming, the forming rolls (11, 12) in at least one of the groups (10) thereof are mounted on frame members (13) which are pivotable about vertical axes (26) such that the forming rolls (11, 12) can be set to run at angles (.alpha. or .beta.) relative to the center line (6) of the conveyor path (5) necessary to achieve a desired conical form of the finished pole or pole member or portions thereof.

Abstract: A method and apparatus are disclosed for forming a barrel coil spring. The apparatus according to the invention has a rotatable head, and clamping device to attach an end of the coil spring to the rotatable head, a forming die head with at least one forming die which may be inserted between adjacent coils of the spring near the second end such that a forming die bears against an inner surface of a coil, a first rotating device to rotate the head in a first direction about an axis substantially parallel to a longitudinal axis of the coil spring, and a second rotating device to rotate the forming die head in a second direction, opposite to that of the first direction, about an axis substantially parallel to the longitudinal axis of the coil spring.

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: An apparatus for producing an electric-welded pipe by continuously shaping a steel sheet into a tubular form in a hot condition is disclosed, which is characterized by a forming roll arrangement of the constant pass-line type in combination with the downward bending system.

Abstract: A heating bath including molten metal is situated at an entry into a hot roll mill such that the metal stock entering the hot roll mill passes through the heating bath to acquire heat therefrom. A cooling bath including molten metal is situated at an exit from the hot roll mill such that the metal stock exiting from the hot roll mill passes through the cooling bath delivering heat thereto. The molten metal in each of the baths is caused to flow counter to the direction of passing of the metal stock therethrough to form within each bath a hotter fraction and a cooler fraction of the molten metal. The molten metal is circulated between the heating bath and the cooling bath so that a hottest fraction of the molten metal in the cooling bath is transferred to the heating bath and a coolest fraction of the molten metal in the heating bath is transferred to the cooling bath.

Abstract: A handtool for restoring and reforming the surface of cylindrical workpieces.

Abstract: A drilling and thread-milling tool is disclosed which has at its front-end 7 at least one end-cutting edge 8 for making a core-diameter hole and, behind it, non-pitched thread-milling teeth 4 to generate thread pitches and for which are provided an axial motion, rotation about its own axis as well as a helical motion. It is desirable that one tool should be adapted for making core-diameter holes of different diameters essentially by means of the end-cutting edge. This is accomplished in as much as the outer diameter of the end-cutting edge 8 is equal to or smaller than the minor diameter of the thread-milling teeth 4, in that the number of thread-milling teeth 4 arranged in axial succession is less than the number of thread pitches to be produced, in that provision is made for the simultaneous cutting of the core-diameter hole and thread pitches and in that the helical motion serving to generate the thread pitches consists of a number of orbits corresponding to the number of thread pitches to be generated.

Abstract: Method and apparatus for straightening the pins of a computer chip, logic or integrated circuit, or other type of semiconductor device having a pin grid array (16). The apparatus includes a rotating turret (28) for positioning the pin grid array (16) at a plurality of stations (20) and (22) for performing a series of straightening operations to the pins (18) at each station, first and second rakes (110) and (110.sup.2), each of the rakes (110 and 110.sup.2) having a plurality of tines (112) extending therefrom for insertion between the pins (18) of the pin grid array (16) in first and second directions, a jig (136) having a plurality of holes (146) therein for receiving the pins (18) when the jig (136) is moved toward the wafer (40) of the pin grid array (16) to straigthen the pins (18), and appropriate controls for advancing the pin grid array (16) positioned in the turret (28) from one station to another and controlling the insertion of the tines (112) of the first and second rakes (110) and (110.sup.

Abstract: In the process for the cold forming of ferrous and nonferrous metal sections, pretensioning is applied to the initially essentially straight metal section, which is clamped at both ends. Next, the tensioned metal section is bent in a rotating bending tool. In order to achieve three-dimensional forming of the metal section, the bending tool effects a controlled movement in all three spatial axes, whereby the metal section is pressed, with a backlash-free guide system, at least in the forming region against the bending tool and guided by positive engagement.