Abstract: An electric machine, such as an induction motor, having a rotor and stator core formed of metal strip coiled about a centrally longitudinal axis extending generally normal to the plane of the strip, and wherein the strip is provided with depressions on longitudinally spaced locations along the length of the strip so as to enable coiling of the strip about the longitudinal axis.

Abstract: A wire forming apparatus for torsion springs is disclosed. This apparatus comprises servomotors for performing the rotational and axial movement of an arbor and the feeding of a wire, a terminal forming mechanism, a cutting mechanism, a microcomputer for driving the servomotors, the terminal forming mechanism and the cutting mechanism, and various detecting mechanisms disposed at each constructional part for performing feedback control through the microcomputer.

Abstract: A wire coil spring forming machine adapted for use with thick wire prevents breakage of a thin wall in a longitudinal groove in a wire guide member or quill when forming a sharp angle bent between a coil body portion and a leading end loop portion, and permits the start of the next spring leading end loop during formation of last spring trailing end loop. A pair of radially movable members move to advanced positions where they grasp the wire portion of an already formed leading end loop just in front of the longitudinal groove. Another radially movable member abuts the loop to bend it at that point without applying the bending force to the longitudinal groove. A body holder means grasps the body after the main tool forms the trailing end loop to permit severing the semifinished spring from the material wire and bending the trailing end loop.

Abstract: A method and apparatus for producing coil springs formed of wire and with elets formed at the ends thereof are disclosed. The apparatus includes a machine for winding spring bodies detachably affixed to apparatus for transferring them from the winding machine to first and second successive eyelet forming stations wherein, at the first forming station, an eyelet is formed at one end of the spring body and, at the second forming station, an eyelet is formed at the other end of the spring body. The spring bodies are divided into transport groups and supply groups arranged side-by-side on upwardly and downwardly inclined ramps, respectively, with their longitudinal axes parallel and at right angles to the transfer direction. Delivery devices are provided between the downwardly inclined, gravity feed supply ramps and the upwardly inclined transport ramps for the stepwise delivery of spring bodies to the eyelet forming stations.

Abstract: A coil winding machine provides a wire guide member having a wire feed channel therein and a support member turnably arranged in relation to the wire guide member and provided with a turnable core bar member of semi-circular shape in the vicinity of an open end of the wire feed channel with a roll stopper for suppressing movement of the tool and a tool member movable between the core bar member and the roll stopper.

Abstract: This invention relates to a wire spring forming machine which consists of structure comprising endless wire feeding rollers which move continuously in a wire feeding direction and feed wire without interruption except for the cutting of each spring as it is formed and this is a substantial improvement over the prior art or general use made of segmental or rack gears which require a reversal of movement to a start position of the gears used for each increment of wire fed for each spring formed and which represents a loss of time during which the structure herein would be forming another spring.

Abstract: A method of making a laminated armature core for a small electric motor is disclosed.In a longitudinal metal strip, a couple of comb-like ribbons having teeth and slots with teeth of one ribbon being complementary to slots of the other are formed. A U-shaped groove is formed on each edge of the teeth. After edge-winding the ribbon, the U-shaped grooves are spread to form shoes extending transversely to the longitudinal axis of the teeth.

Abstract: A stator core including a central cylindrical opening defined by a plurality of teeth consecutive through a circumferential continuous portion is prepared by winding a magnetic strip having a corresponding shape into a spiral. A forming cylindrical rod having a diameter larger than the inside diameter of the core is forced into that opening, and then a pressure is axially applied to the core to compress it to level the beginning and last edges of the strip. The rod is removed from the core and the pressure is released to complete the stator core having a predetermined inside diameter.

Abstract: A continuously fed band is coiled edgewise into a coil so that a maximum elongation of said band occurs at its edge which forms the external diameter of the coil, whereas the elongation uniformly decreases towards the opposite edge. At one side of the band, radially extending recesses are provided. The proposed device for effecting the novel method comprises a bed having mounted thereon a band tensioning means, a straight guide and an arched guide between which there is interposed a shaping member. Recesses provided in the bed receive a rotary disc having fingers which are uniformly spaced thereon and set into reciprocating motion with the aid of a cam. The continuously fed band is driven along two guide channels, one of which is straight and formed by the bed and the straight guide. The second guide channel is arched and formed by a portion of the rotary disc and the arched guide. The shaping member is constructed as a die with a wedge-shaped head.

Abstract: A heat exchanger for refrigerator evaporators of the type consisting of helically coiled refrigerant-carrying tubing with radially inward extending fins formed along the length of the coiled tubing, with the air to be refrigerated directed across the axis of the coil turns. The coil turns are skewed from the helix angle to expose a greater proportion of the fins into the air flow path between the coil turns so as to increase the air flow contact with the fins. The skewing is created by relatively offsetting opposite portions of the coil turns along the air flow path across the helical coil to increase the obliqueness of a portion of each coil turn with respect to the direction of air flow.

Abstract: According to the claimed method a round wire is first flattened and then formed into a serpentine flat spring. The segment portions of this spring are bent up in the form of thrust shoulders and calibrated for height. The shaped spring is coiled into a spiral on a mandrel, compressed and heat-treated before cutting it into individual tangential expanders.

Abstract: Apparatus for guiding and coiling one or more metallic strands that are continuously advancing along their length from a casting apparatus. A coiling apparatus has an open-top coil-collecting basket with concentric, generally cylindrical inner and outer walls. A rotating cone is disposed over the inner wall. At least one boom and a set of opposed rolls and associated fairing assemblies mounted on the boom guide the strand from the casting apparatus to the coiling apparatus. An exit end of the boom directs each strand vertically downward onto the cone of one coiler. Friction between the strand and the cone lays the strand in the basket in horizontal wraps without a reversal of the laying direction or kinks. The boom exit end mounts a straightener that includes a pair of hydraulically-actuated slide bars that are orthogonal to each other and to the strand. The slide bars produce a cyclic deflection of the strand about the center of the cone to form a uniform, non-tangled coil.

Abstract: A method and a device for winding tubes around a core, for example in the manufacture of heat-exchangers, the device including a single horizontal platform concentric with the core and supporting a plurality of winder assemblies. The platform is movable both in translation and in rotation relative to the core so as to perform the winding of the tubes around the core and along the length of the core in a single operation.

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: A method for forming cooling coils of successive layers of rectangular configuration, in which the front end of an elongated tube is threaded between rolls of a straightening apparatus and clamped onto the periphery of a rectangular table, whereafter the table is rotated about a central axis while the incoming tube shifted in direction of this axis, and while the tube upstream of the table is held in taught condition by the straightening apparatus so that the tube is wound into a coil of rectangular configuration about the table. After a coil of predetermined length has thus been wound, the table is stopped, the tube cut between the straightening apparatus and the table and the cut rear end of the tube is also clamped to the table.

Abstract: A starter motor field winding comprises an uninterruptedly continuous conductor wound to encircle a plurality of core elements. The conductor comprises strapping edge wound about cores to form coils. The strapping between coils is edge bent to form connections from one coil to the next. The cores about which the coils are formed may be affixed to an arbor or may be removably mounted on the arbor and thereafter assembled to a stator ring to form a completed stator assembly.

Abstract: In the automated manufacture of helical coils from sheet-metal blanks, each station of a rotatable set or carrousel of winding stations picks up a flat elongated blank from a stationary loader and securely grips and locks one end in an angled position against a slightly-tapered arbor whose subsequent rotation then causes the blank to become tightly wrapped helically about the arbor while retractable ironing plates stretch-form it and while a second locking mechanism positions the opposite end of the blank untl wrapping is completed. The single thrust of a shaped actuating rod causes a locking member to both position itself and move into a clamping relation with the one end of the blank and the arbor, and both the second locking mechanism and the ironing plates are of toggle-type constructions which enable them to hold securely until positively released.

Abstract: A single continuous length of spring wire is formed into a continuous length spiral or helix which is subsequently folded into a wave configuration for establishing in row form, a plurality of individual spring coils disposed generally parallel one to another. Each coil in the row is connected at its opposite ends to adjacent coils by head or connector end sections. The head or connector end sections are then formed, preferably into a planar Z-shaped configuration such that the formed connector sections at the same ends of the coils are disposed in a common plane normal to the axes of the coils which they interconnect. During forming of the end sections or heads of the coils, each connector section is deformed from a looped three-dimensional attitude into the planar Z-shaped attitude by interengagement with novel forming pins and forming dies.

Abstract: Automatic machinery for producing assemblies of coil springs wherein wire is fed to a coiling station for the formation of individual coil springs and wherein transport equipment delivers the coil springs to an assembly station where the springs are tied together into complete assemblies. Indentation means are located for forming indentations in the opposite end convolutions of each coil spring prior to delivery to the assembling station. The indentation means include dies positioned in the path of movement of the transport equipment, and the movement of the transport equipment is stopped as each spring is positioned in the area of the dies. The dies then operate to form the indentations in the respective convolutions.

Abstract: A readily adjustable machine which continuously produces corrugated flexible metal tubing from very light gauge metal and of various diameters. A warping ring receives therewithin a longitudinally corrugated narrow strip of formable metal of light gauge and warps the same helically to produce convolutions by means of a helical warping surface which extends into one of the longitudinal corrugations. The size of the tube produced can be varied by merely substituting a warping ring of a different size. A uniquely shaped pair of die-forming rollers have lock-seam forming surfaces which are adjustable relative to each other to provide variation in the degree to which the seam will permit and withstand axial torque. The lock seam is constructed to be symmetrical about the neutral axis of the corrugation and about the slope line of the common corrugation leg of adjacent convolutions which it constitutes.

Abstract: This invention relates to apparatus for manufacturing tubes by the helical coiling of a strip into successive convolutions. The strip is preferably of a corrugated sheet metal. The coiling means of the apparatus comprises a plurality of non-driven freely rotatable and radially adjustable guide rollers adapted to guide and support the strip during the formation of a convolution. These rollers are arranged on a circle so that they engage the convolution at its outside. Arranged at the point of the strip entry into the coiling means is an inner and an outer connecting roller, the inner connecting roller positioned within and the outer connecting roller positioned outside the circle on which the guide rollers are situated. The connecting rollers have the purpose of joining a convolution after its travel past the guide rollers to the incoming strip so that convolution and strip overlap each other.

Abstract: A wire winding blade extends through spiral outfeed guide members and receives spring-like unannealed wire from a source drawn by rotation of the winding blade; the wire from the source first passes through tensioning means then over an infeed guide pulley which guides it into a linear guide member having a bore slightly in excess of the wire diameter from which the wire passes over a small diameter idler roller sheave which imparts a back bend to the wire which is then fed into the slot of the spiral wire guide means where it is bent in a reverse manner about the winding blade.

Abstract: An ammunition handling system is disclosed having a helical fin of substantially folded plate cross-section made from continuous rectangular ribbons of stock material.

Abstract: A spring forming machine including an inclined bed structure provided with a front side having circular mounting channels surrounded by a ring of access openings, each surrounded by screwthreaded mounting sockets or perforations, and provided with a back side on which is mounted a main drive gear accessible through the openings. The mounting sockets support a variety of tool operating units each having a drive means extending through a selected clearance opening and terminating in a planetary gear engageable with the main drive gear. The mounting channels support separately, or in conjunction with the mounting sockets, a variety of wire forming tool components which are driven by corresponding tool operating units. The main drive gear also operates a wire feeding apparatus offset laterally from the bed structure.

Abstract: A machine for fabricating a helicoidal tube from a longitudinal flat and bendable strip includes a frame, and tube-forming means disposed on the frame for receiving the longitudinal flat strip. The strip is then formed into a tube which has a seam. Helicoid-forming means are disposed on the frame for receiving the tube and for the forming thereof into a helicoid.