Abstract: A fastening arrangement for first and second plate members whereby the plates are permanently interlocked in a flush manner. The first plate member has an open loop depending strap portion pierced therefrom adapted to be engaged in an elongated frusto-conical sectioned raised slot in the second plate member. The parts are of predetermined dimensional relationship such that upon upper and lower die members flattening the depending strap portion engaged in the raised elongated slot the plate members are permanently interlocked in a flush manner.

Abstract: A tubular sleeve of a deformable plastic is longitudinally slotted to define a plurality of laterally separated axially weakened longitudinal columns (62) the respective forward leading edges (64) of which being inserted into an annular passageway (32) formed between an insert (20) disposed in a shell (10) so that the columns curl about and the column medial portions (66) collapse in an accordian-like fashion whereby to radially interferencingly wedge and lock the columns in the passage and thereby to retain the insert in the shell. The curling could be 180.degree. causing the leading edges to retreat coaxially rearward or be 270.degree. causing the leading edges to loop about and be driven radially outward, the leading edges in either possibly engaging its rearward medial portion.

Abstract: A swivel hose coupling assembly and method provides a collar having an angularly inwardly disposed locking annulus. The angular disposition of the locking annulus permits a novel method of assembling the swivel hose coupling members.In a preferred form, the assembly is designed for affixation to one end of an elastomeric hose, and includes a cylindrical insert having a serrated external surface at one end thereof, a shoulder at an opposing end, and a locking groove intermediate the serrated surface and shoulder. A fitting is rotatably mounted over the insert, the fitting having a mating shoulder for contact with the shoulder of the insert. An annular collar is concentrically positioned over an exposed end of the fitting, a first end of the collar containing the locking annulus being inserted first over the serrated portion of the insert.

Abstract: A rotatable cutting bit shield and method and apparatus for attaching the shield onto cylindrical cutting bit shafts uses an annular metal ring having the shape of an inverted dish, and a centrally located hole through the ring. The diameter of the hole is initially larger than the diameter of the cutting bit shank. Compressive pressure exerted on the annular upper and lower faces of the ring by the apparatus according to the method causes the ring to deform into a flatter, more disc-shaped structure. This deformation causes the diameter of the central hole in the ring to shrink, captivating the ring axially between larger diameter annular flanges on the cutting bit shank.

Abstract: A method of preparing bimetallic tubes or pipes for roll-forming ribs therefrom, in which the external tube is subjected to initial compressive stress is introduced, is characterized by roughening the ends of the internal tube, and after placing the internal tube in the external tube the ends of the external tube are clamped on the roughened segments of the internal tube with simultaneous axial displacement of a part of the material of the external tube corresponding to said compressive stresses of a required quantity. From the tube assembly thus prepared ribs are drawn. It is preferable that at least one end of the external tube is formed conically during clamping.

Abstract: The present invention provides a method of fixing a sleeve (3) of malleable metal on a rod (10) of composite material, said sleeve comprising a cylindrical internal housing (6) in which an end (11) of said rod (10) is received. A compression operation is performed causing the sleeve to be stretched in a continuous manner over annular zones of the sleeve substantially from the inlet of the sleeve and substantially up to the end of the rod in such a manner as to cold draw the metal of the sleeve around the rod without stretching the composite material beyond its elastic strain limit.

Abstract: A conductive shield is mounted in a groove formed in the outer surface of a connector housing. The end walls of the housing are undercut. The edges of the shield extend into the recesses formed by the undercut endwalls of the groove so that the shield is retained in the groove. An axially extending slot intersects the groove and recesses so that the shield may be inserted into the groove through the axially extending slot in the form of an elongated strip.

Abstract: A quick action fastener suitable for fastening panels or the like in face-to-face contact, including a pierce nut adapted to be secured within one of the panels and a male stud inserted through the other panel and into a through-hole in the nut. The nut includes a central, pilot portion which is diepunched through the panel and a pair of undercut grooves on opposites sides of the pilot portion, into which edges of the panel are deformed in order to securely hold the nut on the panel. The nut includes a locking element extending across the through-hole which is received within and contacts with a spiral cam slot in the stud upon partial rotation of the stud to lock the stud in the nut and thereby securely fasten the panels together. In one embodiment, the stud is axially biased from the locking element by a spring captured between the head of the stud and one of the panels while another embodiment employs a pair of wire loops forming a spring support for the locking element.

Abstract: An arrangement and method for rotation-secure mounting of a machine on a journal having a threaded portion, the machine element and journal having tooth surfaces which define an annular space therebetween. A thin-walled sleeve made of plastically deformable material and having a wall thickness smaller than the height of the annular space is arranged in the annular space and then is plastically deformed to fill the annular space during tightening of the nut. The sleeve material plastically flows into the interstitial spaces between the tooth surfaces of the machine element and the journal, thereby securing the machine element against rotation relative to the journal.

Abstract: The disclosure is directed to the method of addition, in a fixed and inexpensive way, of a cylindrical sleeve to a key for an anti-theft wheel lug nut having a complementary key pattern formed on a surface thereof, and to the resulting key. The cylindrical sleeve of the key is formed separately from the key and then rigidly attached onto a groove formed in the key itself. The sleeve acts as a guide for the key and prevents the dismounting thereof during the torquing and untorquing of the complementary patterned lug nut.

Abstract: For fastening a cover part at a frame part in which both parts have at least a metallic frame structure, spherical segments formed out of the frame part with fasteners in the form of balls are provided while the counter fasteners are constructed as collars which are components of the cover part and extend angularly bent in the direction of the frame part. After inverting the collars over the balls, each collar is pressed flat by a predetermined amount under straightening during a pressing operation in which the frame part serves as supporting surface so that at the end of the deformation operation, the collar is supported at the ball.

Abstract: Methods of forming joints between bars of materials such as mild steel are disclosed. In one method, the bars are arranged to lie in generally parallel planes but with their axes at an angle to one another, and a plastically-deformable tubular stub of round or square cross-section is disposed between the bars with its axis substantially intersecting the axes of the bars, which are then pressed together to deform the stub partially around the two bars. In a second method, a bar is arranged in a T-formation with a hollow member, two opposed regions at the end of the tubular member are deformed inwardly and back along the member axis, and the bar is then pressed into the groove so-formed at the end of the member, to deform the end portion partially around the bar. Heat may be used, in the former case on the stub and in the latter case on the tubular member, so that after completion of the joint the heated stub or tubular member will cool and contract, firmly to grip the or each bar.

Abstract: A method of mounting an annular element on a tube which involves surrounding said tube by a tubular sleeve of aluminum or an alloy thereof, which is sufficiently thin to be plastically deformable and has a similar cross-section, with suitable clearance, with one of the sleeve ends having an outside bevel; surrounding said tube, on the side of the sleeve bevel, with an annular element to be fastened, wherein the annular element has at least one opening whose crosswise dimensions are greater than those of the tube, but whose radial clearance with said tube is less than the thickness of the sleeve, and which has, on the sleeve side, an inside bevel whose maximum crosswise dimensions are greater than the crosswise dimensions of the end of the element and the sleeve toward one another, by a suitable means, and introducing the sleeve, by force, between the annular element and the tube by plastically deforming the sleeve and tube, thereby mounting the annular element.

Abstract: A method of producing a drive shaft with drive elements on a cylindrical basic part includes forming a desired contour for a drive element on pairs of discs, forming holes in the discs of each pair having axes being inclined relative to the surfaces of the discs and having inclinations being opposite to and mirror images of each other, pushing the discs onto a cylindrical basic part with the disc of each pair being congruent to each other, and pressing the discs of each pair together until they are substantially perpendicular to the longitudinal axis of the basic part.

Abstract: A fastener for securing workpieces having aligned bores and including a tubular sleeve and a pin with the sleeve having an elongated sleeve shank and a through bore and the pin having an enlarged pin head and an elongated pin shank, the pin shank having a retaining groove and a lock groove located proximate thereto, a resilient retaining clip located in the retaining groove and being axially captured therein, the retaining clip being of a split construction and having a relaxed outside diameter greater than that of the workpiece bores and being adapted to be located in at least one of the bores with an interference fit to thereby axially retain the pin to the workpieces in a preassembly, the sleeve shank having a sleeve lock groove adapted to be radially deformed into an aligned lock groove in the pin, the sleeve shank having a grip adjusting groove adapted to deform radially whereby the fastener can accommodate workpieces varying in total thickness.

Abstract: A fastener for securing workpieces having aligned bores and including a tubular sleeve and a pin with the sleeve having an elongated sleeve shank and a through bore and the pin having an enlarged pin head and an elongated pin shank, the pin shank having a locking groove, a resilient retaining clip located in the locking groove and being axially captured therein, the retaining clip being of a split construction and having a relaxed outside diameter greater than that of the workpiece bores and being adapted to be located in at least one of the bores with an interference fit to thereby axially retain the pin to the workpieces in a pre-assembly, the retaining clip and pin lock groove defining a lock cavity, the sleeve shank having its free end adapted to be radially deformed into the lock cavity, the sleeve shank being adapted to buckle radially after the sleeve free end is deformed into the lock cavity whereby the fastener can accommodate workpieces varying in total thickness.

Abstract: A bonnet is locked to the body of a valve into which the bonnet screws by a sheet metal bonnet lock which includes a portion that will mate with facets on the bonnet or with the sides of the valve body. Another portion of the bonnet lock is then deformed to mate with the other of the bonnet facets or valve body sides. The portion of the bonnet lock that mates with the facets on the bonnet circumscribes the bonnet such that one portion of the bonnet lock is fixed to the bonnet and the other portion is fixed to the valve body following deformation of the bonnet lock to prevent the bonnet from turning relative to the valve body.

Abstract: In this pipe connection, the pipe end part (5) is pressed, as a result of cold-forming in zones, by means of a press ring (4) to be displaced axially, to form a positive leak-proof connection with a connection piece (1) inserted into the pipe end part and belonging to a pipe fitting (2). A sleeve (3) to be pushed onto the pipe end part is provided with an annular outer bead (7) and, when the press ring is pressed on, is deformed in such a way that the sleeve material is displaced radially inwards in the bead zone (8), the pipe end part and connection piece acquiring an annular recess (9). Moreover, the press ring (4) has at its rear end an annular inner bead (10) which at the same time displaces the sleeve material radially inwards at the rear sleeve end, as a result of which further pressing takes place at the end (12) of the connection piece (1). The gap between the pipe and connection piece is thus closed, so that no crevice corrosion can occur.

Abstract: The invention relates to a can-type housing made of metal, as a semi-finished product, such as is used, for example, for electrolytic capacitors. Furthermore, the invention relates to a process and a device for reducing the diameter of and flanging such a can-type housing. In the conventional way, the diameter of a can-type housing of this type was reduced from below in the direction of the upper open can edge. As a rule, flanging is carried out by a separate device. The invention improves the conventional measures by rewidening under dry conditions the can-type housing pre-widened under wet conditions. According to the process, the can-type housing provided with the housing widening is then closed from the can edge axially downwards so as to reduce its diameter, this process step being supplemented, in addition, by a further flanging step carried out in the same device.

Abstract: A method and apparatus for assembling an inner spiral wound gasket ring (12) within an outer concentric gauge ring (14). The inner gasket ring (12) is first positioned loosely within the outer concentric gauge ring (14) and the combined rings (12, 14) are then positioned within a tapered opening (28) beneath a mandrel (19). Mandrel (19) is then moved downwardly within tapered opening (28) into contact with gauge ring (14) to move gauge ring (14) downwardly along the tapered surface defining the opening (28). Radial deformation of the outer gauge ring (14) occurs to move inner peripheral surface (64) of ring (14) radially inwardly so that a bead (58) on the gasket ring (12) is received within a groove (66) on the gauge ring (14) thereby to maintain the concentric rings (12, 14) in assembled position.

Abstract: The invention relates to a method for joining tubular parts of a heat exchanger that are inserted into each other, as well as to a tool for practicing the method.

Abstract: A device for securing a sleeve on the abutting ends of two axially aligned reinforcing bars includes an upper device part, a lower device part aligned below the upper device part and a drawing die mounted on the lower device part. Cylinder-piston units interconnect the upper and lower device parts for moving the drawing die over the sleeve and coupling the reinforcing bars together. The cylinder-piston units are disposed in parallel relation to one another and to the axis of the drawing die. At least one cylinder-piston unit provides the drawing force and another provides a counteracting force. The cylinder-piston units are both located on the same side of the drawing device axis and are spaced at different distances from the drawing die axis.

Abstract: A process for forming a prestressed anchorage by drawing a steel sleeve over a metal core of elongate shape having a substantially round section, consisting in using a sleeve having an inner diameter substantially equal to the outer diameter of the metal core, in forming a grooved portion or indentations in the inner cylindrical surface of the sleeve, in subjecting the inner cylindrical surface of the sleeve and its grooving to surface heat treatment adapted to increase the hardness thereof and to give thereto a value greater than that of the metal core, by causing the tempering depth to increase from one end to the other of the sleeve and in anchoring the sleeve on the metal core, in a way known per se, by drawing the sleeve through a draw-plate.

Abstract: A method of rigidly connecting a plate and a tube such as those of a muffler associated with an internal combustion engine. The plate is formed with an eyelet by burring or like technique and, then, the tube is inserted into the eyelet as far as a predetermined position. A stop is placed to backup the plate at a flat surface of the latter where a flange produced by the eyelet is absent. This is followed by driving a die to compress the flange in such a manner as to reduce the diameter of the eyelet, thereby plastically deforming the flange. Part of the flange proportional to the decrease in diameter is caused to thrust into the periphery of the tube.

Abstract: An impeller is assembled onto a turboshaft such that the impeller is deformed at its end walls so as to deform the inner wall of the hole of the impeller against the shaft such that the clearance between the shaft and the hole of the impeller is reduced to zero, thereby, preventing bending or offsetting of the shaft relative to the impeller. For causing the deformation of the shaft, washers with a circular projection are disposed on both sides of the impeller, with the projection facing the end walls of the impeller. The washers and the impeller are clamped by a nut which is screwed to the threaded end of the shaft, resulting in the projection being forced into the end wall of the impeller, thereby deforming the impeller.

Abstract: A process for manufacturing a hose mouthpiece by joining a nipple having a radially outwardly spread end to a mouthpiece body having an axial nipple holding hole. The nipple is inserted into the hole in the body until its spread end abuts on a seat surface encircling one end of the hole. The spread end is press formed against the seat surface so that it may become flush with the seat surface, and a seat surface encircling the other end of the hole to define a seat for one end of a hose is caulked about the nipple projecting outwardly from the other end of the hole, whereby the nipple is secured to the mouthpiece body. The process is suitable for making, for example, a mouthpiece for a brake hose, and inexpensive, since it does not include welding or brazing.

Abstract: A plastics member (16) is sealingly secured to a sheet metal member (10) by creating in the sheet metal member (10) an opening which is defined by a free edge (14) of the sheet metal, forming-up a marginal region (12) of the sheet metal member (10) around the location of the opening, receiving the plastics member (16) in the opening, and re-forming the marginal region (12) so as to close the opening onto the plastics member (16) and cause the free edge (14) to bite into and seal around the plastics member (16).

Abstract: An apparatus comprising a sleeve having a first end, a second end, and a center portion; and a lockring slidable on at least the first end. The second end could be the mirror image of the first end or could be any fitting desired to be attached to a tube section. The first end has a constant radius annular chamber such that the end of a tube section slides easily therein initially. The exterior of the first end of the sleeve has a "REVERSE TAPER" configuration such that the exterior radius of the sleeve is least near the center portion and increases generally outward therefrom to a maximum near the end of the sleeve. When the lockring is forced onto the exterior of the sleeve, the sleeve and tube section are deformed the least amount near the center portion, the amount of deformation than generally increasing outward therefrom to a maximum near the end of the sleeve.

Abstract: A heating valve is provided which comprises a valve body with a plurality of connecting branches, a valve seat disposed inside the valve body, a bonnet seated in a connecting branch opposite to the valve seat, a valve stem passing through the center of the bonnet, a valve plug disposed at the end of the valve stem, a tube having an inner annular bottom extension and an inner annular top extension, with the tube surrounding the stem and pressing with its bottom against a step of the bore of the bonnet, O-rings disposed against the top face and the bottom face of the tube, a stop-ring attached to the stem holding a compression spring against the bottom of the tube and a packing nut bolted into the bonnet, surrounding the stem and pressing against the O-rings for forming seals.

Abstract: A novel method of leak proof attachment of the outer edge of a flange-type sheet metal element in the bore of a steel cup-shaped valve tappet acting as a hydraulic play-compensating element for a combustion engine comprising (a) reducing the diameter of the bore of the valve tappet in two steps from the open end, the axial spacing of the two steps being greater than the thickness of the sheet metal element, (b) placing the outer edge of the sheet metal element on the second step and (c) simultaneously axially applying pressure on the first step with a die and heating by electric resistance with leads connected to the die and the hold-down ram and apparatus for the process and the product produced thereby.

Abstract: A method for producing a filled calender roll comprising a load carrying shaft portion and having thereon a cover portion made of paper or cloth or the like. The cover portion is made by subjecting a great number of annular fiber material sheets fitted on the shaft portion to a very strong compression in the axial direction of the roll. The method includes the step of making the sheets oversized in diameter with respect to the diameter of the shaft portion so that there is initially, in the assembling program, a space at the interface of the shaft portion and the cover portion. After the axial compression of the fiber material and under the influence of a vacuum created at the interface, the sheets are caused to fill the void between the cover portion and the shaft portion.

Abstract: A belt tensioner has an elongated support bar formed with a transversely throughgoing aperture and an annular inwardly directed lip around the aperture. A hardened metallic inner bearing race is centered on and elongated along a bearing axis and has one end extending into the aperture and formed with a circumferential radially outwardly open groove in which the lip is snugly fitted. An outer race is mounted on and coaxial with the other end of the inner race and is supported thereon by means of roller-bearing elements. The nonmalleable one end of the inner race does not need to be deformed to secure it in the support bar; instead the support bar, which is normally made of malleable steel, is deformed to make the connection.

Abstract: A method of prestressing a tubular apparatus having coaxial inner and outer tubes which are connected to each other at axially spaced locations comprises, after the inner and outer walls are connected to each other and the tube is heat-treated or otherwise processed, reducing the diameter of the outer wall so that the outer wall is elongated. The elongation of the outer wall establishes a prestressed condition between the inner and outer walls, with the inner wall under tension and the outer wall under compression. The reduction in diameter of the outer wall can be accomplished by using a roll extrusion machine, a tube reducer or a draw bench.

Abstract: A coaxial connector element including a tubular body having an internal cavity, a rod secured against axial motion in the tubular body by a bead made from a dielectric material, such as glass, the axial rod protruding from the tip of the tubular body closed by the bead, a central contact having an axial hollow for its engagement around the rod within the tubular body, and an insulator between the central contact and the wall of the internal cavity within the tubular body. The central contact has near its tip, engaged in the axial rod an annular shoulder which protrudes inwardly into the axial hollow provided in the central contact, the angular shoulder penetrating into the axial rod.

Abstract: A composite gasket includes two spaced rings of refractory sheet material and a ring of knitted wire mesh. The knitted wire mesh extends into the space between the refractory rings and radially outward from the outside diameter of the refractory rings.

Abstract: A high temperature seal, particularly suitable for use in vehicle engine exhaust systems, is formed of a composite structure including a refractory metallic oxide impregnated into compressed knitted wire mesh. In a typical application, the seal is disposed between confronting ends of an engine exhaust manifold pipe and an exhaust tail pipe and permits relative rotation of the pipes without impairment of the effectiveness of the seal thereby preventing leakage of high temperature exhaust gasses passing through the joined pipes.

Abstract: A fastening device by which a thermoplastic cover may be fixed to a tubular component. The cover fits tightly into the tubular component which is provided in the region of the cover with bores through which a lost pin is pressed after heating into the constituent material of the cover. The pin has a smaller diameter than the bore so that material displaced by the hot pin is able to flow into the bore.

Abstract: A device for providing a high tensile, electrically insulated connection ween two sections of the lead wire of an overhead power line is disclosed. The device is suitable for use as a line separator or phase separator of a lead wire which supplies power to the current collector of a railway vehicle. The device comprises spaced parallel, glass-fiber reinforced plastic insulating rods, each of the ends of which are connected with metal rods of the same outside diameter, and which are arranged in a common plane with the lead wire sections. Two tubular traverses extend transversely to the insulating rods and are rigidly connected to the metal rods at the ends of the insulating rods. A cable system is provided for suspending the device from a support cable. Also disclosed is a method of connecting the plastic rods with the metal rods to form high tensile connections, the metal rods having an axial clamping channel and the method including progressive radial compression of the metal rods about the plastic rods.

Abstract: A torque-transmitting connector is disclosed which fits between a spindle and the walls of a bore in a rotating member. The connector includes a sleeve encircling the spindle and two flanges located at its opposite ends. Each flange is initially frustoconical, and is forced into substantially a disc shape to grip the spindle and the wall of the bore. The flange at the bottom of the bore is flattened first by a small diameter punch acting against the other end of the sleeve; and the other flange is then flattened by an annular punch encircling the small diameter punch.

Abstract: A method is disclosed for clamping together a first and a second part, the first part having a flange thereon, the second part having a groove which may receive the flange. The method includes the steps of placing a deformable seal on the bottom of the groove of the second part, placing the flange of the first part on the deformable seal as the flange is guided into the groove, clamping the first and second parts together while deforming the seal until the seal approximately fills a space defined between a lower surface of the flange and the walls forming the groove, and deforming certain parts of a vertically upright standing area of the second part by rolling the certain parts of the area over an upper surface of the flange into generally horizontal positions while leaving other parts of the area generally in their vertically upright condition to thereby form an approximately corrugated edge on the second part, which holds the first and second parts together in a clamped condition.

Abstract: A drill steel and method of making a drill steel with an insert which provides a male insertion segment to form a joint with the female end of a drill steel. The insert is formed with a reduced end having an annular lip and can be utilized in a die forming process which forms the end of a drill steel around the insert in a one-step forming operation while at the same time enlarging the drill steel end to form a shoulder abutment.

Abstract: A pneumatic spring counterbalance extensible link including a closed end cylinder with an end connector a piston and rod assembly within the cylinder and maintained therein by the crimped over end portion of the cylinder retaining a rod bushing and rod to cylinder seal. The cylinder is pressurized prior to assembly of the complete piston and rod into the cylinder. The piston assembly includes orifice by-pass means either in the piston periphery or in a piston ring, and the piston may include a fail-safe provision in the event the orifice is clogged. A crimping die assembly is used in assembling and completing final assembly of the counterbalance components while simultaneously maintaining the link in a pressurized environment, utilizing sealed arrangement between the crimping dies to maintain pressurization of the interior of the dies and the counterbalance components prior to assembly of the components.

Abstract: A joint is provided between one tube and another tube without the necessity of a heavy thick-walled metal coupling. The joint includes first and an optional second enlarged portions on a first tube with the second enlarged portion near an end of the second tube. A first shoulder is provided between the first enlarged portion and the main body of the first tube. A second annular shoulder is provided at the junction between the first and second enlarged portions. The end of the second tube slips into the first enlarged portion of the second tube and the second tube is then axially compressed so as to form an annular bead which acts against and is contained by the second enlarged portion of the first tube. This axial compression provides both a mechanical interconnection so that the tubes will not axially separate despite fluid pressure or mechanical force, and also provides a fluid tight seal at the annular bead and the second shoulder or second enlarged portion.

Abstract: An assembly of a bearing unit with inner and outer members and rolling elements between them and a universal joint member, with a retaining element which has been deformed to hold the members together and removal of which to permit dismantling of the assembly leaves at least one of the members undamaged and fit for further service. Torque transmission between the members may be by way of tapered splines.

Abstract: An improved method of making a retention collar (16) medially of an elongated electrical contact (10) of the type including a shoulder portion (14) and a termination portion (18), the shoulder portion (14) being formed with an axial passage (22) sized to secure several straight conductive wires (24) for mating. The individual wires are inserted into the passage and the shoulder portion then swaged (i.e., squeezed) by a pair of movable dies (36, 46) in an axial direction along the entire length of the passage so that an outer wall portion of the shoulder portion is pushed axially rearwardly and radially outwardly to thereby form the retention collar (16) and also pushed radially inwardly to thereby secure the wires within the passage.

Abstract: In a glow plug for use in a diesel engine of the type wherein a heater rod is connected to one end of a hollow holder, and an external connecting terminal is inserted into the other end of the hollow holder through an electric insulator and electrically connected to the heater rod, an integrally combined terminal unit including a metal pipe, an electric insulator and the external connecting terminal embedded in the insulator is prepared. After inserting the terminal unit into the other end of the hollow holder, an external pressure is applied to the other end to deform the metal pipe for firmly bonding the metal pipe to the insulator. Thereafter an end surface of the other end of the hollow holder is caulked to form an annular ring that holds the inserted terminal unit. With this construction, the completed glow plug is maintained in a perfect air tight state regardless of the variation in the ambient temperature.

Abstract: An improved apparatus and a method are disclosed for extruding an improved type of small part of the type having a body portion (12) of extrudable material and a fixture (18, 20; 54, 56) of harder material captured at the surface of the body. A female die element (22, 24) is provided with a bore (26) which extends into a downwardly opening cavity (28) having a geometry corresponding to the desired geometry of the body portion of the part. A male die member (36) is positioned within the bore and includes at its lower end a threaded socket (50) or protrusion (52) for holding the fixture of harder material during extrusion. Thus, when a billet of extrudable material (48) is placed in the cavity and the male die member is moved downward, the material extrudes around a portion of the fixture held at the lower end of the male die element.

Abstract: Device for fastening a centrally recessed metal slug by slipping it over a projecting part of an assembly, including a collar or crown-like projection surrounding the central recess and extending from the slug in a direction in which the slug is to be slipped over the projecting part of the assembly, the surrounding projection being engageable with contact regions of the assembly adjacent the projecting part thereof after the slug has been slipped over the projecting part of the assembly, a region of the slug initially set back from the surrounding projection thereof being bringable over the travel path of the slug relative to the assembly, into contact with further contact regions of the assembly and, during mutual travel of the slug and the assembly, regions of the surrounding projection of the slug being shiftable radially inwardly so as to clutch and be clamped to the projecting part of the assembly.

Abstract: A method of securing a bearing either bushing, roller or ball bearing and a spacer or fitting into a soft non-ferrous material such as aluminum and materials of that hardness. A bearing of this invention containing an annular groove and adjacent forming shoulder or spacer, at least 1/2 a millimeter greater in diameter than the body of the bushing is inserted into a predrilled hole. A metal ring is formed in the annular groove as the shoulder is pressed into the parent material. This metal ring being a part of the parent material and being packed into the annular groove prevents retraction of the bearing or spacer during operation by its diameter being greater than the annular groove in the bearing. The material in the annular groove is of a lesser diameter than the body of the bearing and fitting and interfers with axial movement. The shoulder of the bearing or fitting has longitudinal grooves around its circumference.

Abstract: A magneto device for generating signals comprises a rotor including a permanent magnet and a pole piece which are secured to a rotary body, and a stator including a stationary pole piece and a signal output coil. Formed in the outer periphery of the rotary body is a recess in which the permanent magnet and the pole piece are inserted in this order. A cylindrical key member made of a non-magnetic metal is inserted in an annular space between the wall of the recess and the permanent magnet and pole piece. The key member is plastically deformed by pressing to secure the permanent magnet and pole piece to the rotary body.