Abstract: An electromagnetic switch has a solenoid coil, a sleeve and a movable core which slides in the sleeve. A metal thin film is formed on an outer peripheral surface of the movable core by electroplating. The metal thin film is harder than the inner surface of the sleeve, and has high melting point and high smoothness. Accordingly, adhesive wear between the sleeve and the movable core is reduced, and sliding durability under high temperature is improved.

Abstract: A gas flow control valve for quietly regulating the flow of a gas. The valve includes first and second coaxially oriented elongate tubes of magnetic material and an elongate sleeve of nonmagnetic material coaxially connecting the tubes. An electric coil assembly is disposed around the sleeve. A cover of magnetic material is provided around the coil and is in contact with the tubes. A nozzle opening is disposed within the first tube and has a valve seat encircling the nozzle opening. An elongate armature is axially slidably disposed within the sleeve and the first and second tubes and is moveable between first and second positions. The armature has a first end with an elastomeric seal member which abuts the valve seat when the armature is in the first position thereof to block the flow of gas. The armature further includes a gas flow passageway extending axially to a second end thereof. An elastically yieldable member is provided for continually urging the armature toward the first position thereof.

Abstract: A magnetic actuator (10) suitable for the operation of electric circuit breakers which uses a laminated yoke structure (12) to increase permanent magnet flux holding forces. The actuator comprises a magnetic yoke (12) which forms both low and high reluctance flux paths with at least one permanent magnet (30) and an armature (40) axially reciprocable in a first direction within the yoke (12). The actuator is configured to provide a first low reluctance flux path and a first high reluctance flux path when the armature (40) is in a first position and a second low reluctance flux path and a second high reluctance flux path when the armature (40) is in a second position. A pair of electromagnetic coils (60, 61) are used to drive the armature (40) between the first and second positions.

Abstract: Solenoid apparatus having a substantially cylindrical casing, an electro-magnetic coil, a plunger axially aligned and slideably mounted to the casing, a housing hermetically mounted to an end of the casing and a vacuum source operatively coupled to the external port. The plunger has a first end extending outside of the casing, a second end and an internal passage extending from the first end to the second end. The electro-magnetic coil is selectively energizeable for moving the plunger between a first position and a second position. The housing corresponds to the plunger second end to define an inner chamber which encloses the plunger second end. The housing includes an external port connected to the inner chamber so as to provide an unobstructed pathway from the external port to the first end of the plunger via the internal passage and the inner chamber regardless of whether the plunger is in the first position, the second position or therebetween.

Abstract: A sealing element is fitted between the outside periphery of the magnet armature and the inside periphery of the valve housing and, parallel to the sealing element, an orifice is fitted in the armature, thereby establishing a permanent pressure fluid connection between the pressure fluid chamber disposed inside the magnet armature and the pressure fluid chamber disposed outside the armature.

Abstract: A low-noise solenoid has an armature with a projecting ridge receivable within a groove in a pole piece. As the ridge enters the groove, the magnetic force which opposes a return spring decreases until there is equilibrium whereat the armature remains suspended without impacting upon the pole piece.

Abstract: A solenoid has an axially movable plunger having a plunger rod extending from it. The plunger rod has the capability of angular deflection relative to the axial movement of the plunger within the solenoid.

Abstract: An electromagnetically actuated valve comprising an annular-shaped solenoid coil arranged in a housing and surrounding an axially reciprocal magnet armature of metallic material is disclosed. The magnet armature is provided on a front end with an elastomeric sealing member facing a valve seat made of elastomeric material. The magnet armature and the sealing member are joined together via form locking.

Abstract: A rod or stem of an armature for an electromagnet is composed of a synthetic resin which can be molded directly in the armature, preferably with an annular flange forming an anti-adhesion ring.

Abstract: The invention concerns a bistable magnetic drive with an assembled armature 3, 4 consisting of a high-grade, disk-shaped permanent magnet 3 with two appropriately shaped pole pieces 4,4' and displaceable sideways off the coil 1 transversely to its axis inside an electromagnetic annular pole-piece Rp between two electromagnetic stop pole-pieces 5, 5'. The invention describes illustrative embodiments and applications of this drive as an excursion and oscillating magnet, further a circuit for DC operation. A capacitor circuit furthermore allows mono-stable operation. The advantages are a lightweight armature, high efficiency, bilateral operation, versatility and simplicity.

Abstract: A high-speed impact hammer type solenoid capable of operating at high speed such as 500 to 1000 strokes per second and with a relatively long stroke length. It is housed in a cylindrical shell and includes two separate coils and magnetic circuits operating on a single short plunger. The plunger is driven magnetically in both directions. The short plunger has reduced mass. This is made possible by elongated backstops extending through the coils to the plunger and by a flux washer extending from the shell to the plunger. Close control of the plunger stroke is achieved by a non-magnetic sleeve surrounding the plunger and spacing the backstops which are screw threaded into the shell. Resilient anti-residual pads on each side of the plunger absorb the impact of the plunger with the backstop, start the plunger in the opposite direction and speed up the decay of the magnetic field.

Abstract: An analog proportional pressure control 3-way valve includes an elongate cylindrical valve housing having an axial through bore defining an interior chamber, one end of the housing comprising an end port opening, a plurality of axially spaced side port openings defining an inlet and an outlet, and an axial opposite end comprising a sleeve end receivable in a solenoid, in use. A valve member is movable in the chamber at the port end for selectively controlling fluid pressure through the chamber between the end port opening and the outlet in the neutral position or between the inlet and the outlet in a regulated position. A solenoid plunger is movable in the chamber at the sleeve end and is operatively associated with the valve member for positioning the valve member. A stop is mounted to the housing at the sleeve end for retaining the plunger in the chamber.

Abstract: An actuator (24) for a valve (10) includes a housing tube (26) enclosing an internal cavity (48). A plunger (42) is mounted for movement in the internal cavity. The plunger includes four slots (50). Rollable spheres (58) are positioned in the slots between staked areas (62). A magnetic field created by electrical current passing through a coil (34) moves the plunger downward to open fluid flow through a control element (20). Flow through the control element enables controlled flow from an inlet (14) to an outlet (16) of the valve. The actuator construction provides for substantial elimination of sliding friction acting on the plunger, reduces hysteresis and the amount of power required to move the plunger, and facilitates accurate control of fluid flow rate through the control element.

Abstract: An assembly is provided for use in a solenoid having an energizable coil. The apparatus includes a ferromagnetic main body member adapted to be received in the coil. An armature chamber having a constant diameter is disposed in the main body member. A radially externally facing taper is formed in the outer surface of the main body member. The taper extends between the armature chamber and the outer surface of the main body member. A stationary pole piece and an end plug respectively define a first and second end of the armature chamber. An armature member is positioned in the armature chamber for axial sliding movement relative to and defining a working gap relative to the pole piece. The armature includes a fluid passage adapted to provide nonlaminar fluid flow. A nonferromagnetic sleeve is positioned on and fixedly connected to the main body member.

Abstract: An improved solenoid wherein the end of the armature within the first coils has a predetermined length of rigid non-magnetizable material secured to it, and a second, electrically energizable coil being energizable in a manner opposite to that of the first coil, being secured to the other end of the length of non-magnetizable material so as to move therewith from a position adjacent the first coil when the arm is in extended position to one space therefrom when the arm is in retracted position. This coil provides magnetic repulsion between the two coils to produce good starting power for the armature when the first coil is energized, as a result of repulsive magnetic forces created between the two coils.

Abstract: A solenoid has a coil energizable to displace an armature in one direction and a spring urging return of the armature in the other direction to a rest position in which an end of the armature engages a stop. The end of the armature has a conical projection machined thereon which projects from the end thereof. The stop is a resilient grommet having conical bore therein so that the rest position of the armature is defined by the spring urging the armature to the rest position with the conical projection of the armature resting in the conical bore of the stop to thereby provide noise-free and rattle-free positioning of the armature at the rest position.

Abstract: An inexpensive type of linear solenoid actuator for moving a plunger along a straight line, while providing a force on the plunger due to the actuator which does not vary greatly over the length of stroke of the plunger; a spring opposes the force exerted on the plunger by the solenoid, so that the plunger will assume any of a range of positions in response to different currents through the solenoid. The plunger has a first larger portion of magnetic material sliding in a first bearing; a tapered second magnetic portion extending forwardly from the first portion; a magnetic third portion of substantially cylindrical form extending forwardly from the tapered portion; and a front non-magnetic portion sliding in a second bearing and supporting the front end of the plunger. The second bearing is in a magnetic end piece having substantial axial width.

Abstract: A solenoid plunger magnet system is disclosed, preferably to be used as print hammer in a print hammer device. Known solenoid plunger magnets have in the exciting coil a first interferric gap as working interferric gap and a second interferric gap outside the exciting coil as loss interferric gap. The magnetic lines of force at the second gap are lost as moving forces for the solenoid plunger. The purpose of the invention is to increase the magnetic force of solenoid plunger magnets by using the second gap as well for generating forces, without affecting the generation of forces at the inner gap. For this purpose, a male taper control is arranged at the outer gap, which has a cylindrical shape and the usual length of loss gaps. A considerable increase of the magnetic force is thus achieved.

Abstract: A solenoid actuator that includes a ferromagnetic armature body mounted for movement through a defined stroke in the direction of its central axis. A stator includes an electrical coil surrounding the axis of the armature, and a ferromagnetic stator body having a first portion axially opposed to the armature body and a second portion radially surrounding and spaced from the armature body. A ferromagnetic ring is positioned on the armature body radially adjacent and opposed to the second portion of the stator body. The opposed surfaces that define the air gap between the armature ring and the stator body are of identical conical construction and overlap each other as viewed in the axial direction.

Abstract: A metal insert is provided for use in forming an elastomer-tipped armature to a precise length. The insert is formed as an elongated member with a central hole passing through its length, and an elastomer element is molded within the hole. A circumferential groove is formed in the exterior surface of the insert to create a weakened "hinge" point in the insert wall such that, as mold elements for forming the elastomer element engage opposing ends of the insert, the insert may be compressed longitudinally at the groove to thereby decrease the overall length of the completed armature to within a predetermined tolerance.

Abstract: Known magnet armatures for electromagnetically activated valves are machined out of solid material and are relatively high in weight, so their switching times are not short enough. The magnet armature of this invention is intended to be simple to produce and intrinsically low in weight. To enable providing the magnet armature with a wall of slight thickness, the circumference of the magnet armature, at least in a region in which it surrounds the valve body, is profiled in a undulating pattern, such that so-called wave troughs contacting the valve body connecting tube and crests protruding radially beyond them are formed. The troughs are joined to the valve body, and between the wave crests. The magnet armature may be produced by sintering, by severing it from a profiled tube, or by deformation of a tube. The magnet armature is used in a fuel injection valve for fuel injection systems in internal combustion engines.

Abstract: A coaxial engine starter comprising a solenoid switch assembly including a non-magnetic sleeve disposed side by side relative to the iron-system bushing for guiding the plunger in a moving space from its return position to the position in which the plunger abuts against the front magnetic path section. An end face of the rear magnetic path section on the side of the front magnetic path section is an outwardly facing slope surface. The direction of twist of the helical spline formed on the output rotary shaft is opposite to the direction of wind of the return coil spring.

Abstract: An electromagnetic actuator includes a frusto-conical projection having a central opening formed therein. A winding is contained in a housing surrounding the projection which encompasses the projection. A shaft extends through a central opening in the projection and carries an armature having a reciprocally configured frusto-conical surface. Excitation of the winding causes linear movement of the shaft on bearings contained within the housing.

Abstract: An electromagnetic shear lock comprising an electromagnewt having an E-shaped cross section with a coil positioned about the middle leg of the E is mounted in a doorway and an armature having a central projection is mounted to the door, where the middle leg of the E is shortened to define a recess to receive the armature projection and provide mechanical reinforcement against shearing when the electromagnet is energized. The inner edges of the outer legs of the E and the edges of the armature projection are matingly beveled to prevent binding when the electromagnet is de-energized and an airgap is defined between the middle leg of the E and the armature projection to overcome any effects of residual magnetism.

Abstract: A high-speed solenoid valve is described having a polymer film lubricant located in the radial magnetic gap between the bore of the stator housing and the solenoid armature. The film forms a lubricating barrier during axial movement of the armature in the stator bore.

Abstract: The invention provides an electromagnetic actuatable device including at least one current carrying winding having electrical terminals for applying voltage thereacross and a ferrymagnetic member configured to provide a closed magnetic flux path for magnetic flux induced by the winding when voltage is applied thereto. The member is at least partly disposed within the winding and has means locatable at least in proximity to the winding for modifying magnetic field intensity therethrough. One of the windings or members is adapted to be immobilized with respect to the other so that upon the application of voltage to the winding the non-immobilized winding or member is movable with respect to the other as a result of the force developed by the induced flux.

Abstract: Disclosed is a solenoid having a central and a peripheral air gap between the armature and the pole piece. The energizating coil is located in the space between the central core and the peripheral portions of the pole piece and armature. In one embodiment, an output shaft is received in an aperture in the central core of the pole piece and connected to the armature. In preferred embodiments, a longitudinally and radially extending slot is provide to produced eddy current losses. Additionally, mass is removed from non-critical portions of the armature to reduce its weight and increase its acceleration during energization of the solenoid. By utilizing stepped changes in the pole piece and armatures, peripheral portions and central core portions as well as variations in the central and peripheral gaps, the force/distance curve of the solenoid can be tailored to the specific application.

Abstract: An electromagnet, for valves, comprises thin-walled axially symmetrical parts and is adapted to different uses by special air gap arrangements and armature suspensions; the electromagnet generates high magnet forces at low armature mass and is employable, in particular, for actuation of fuel injection valves for internal combustion engines and in general hydraulics; the electromagnet possesses a high mechanical stability and eddy current depletion combined with simple armature suspension and low cost of manufacture.

Abstract: A solenoid operated valve is disclosed having a valve housing including a passage therethrough, a valve seat within the passage, and a valve member movable between an open and a closed position. A solenoid actuator is provided for effecting movement of the valve member. The solenoid includes a coil selectively energizable and de-energizable by a source of electric power for generating a magnetic flux. A tube is provided having a closed outer end and an open inner end disposed generally coaxially with respect to the coil, and with the inner end of the tube being secured to the valve housing. The tube receives the valve member as it moves axially within the tube between its open and closed positions. A housing receives the coil and the housing has an outer face with an opening therein such that with the housing and the coil receiving the tube, the outer end of the tube extends out beyond the outer face of the housing.

Abstract: An electronic automatic transmission controller is provided which is adapted to enable electrical control over automatic transmission devices of the type typically used in motor vehicles. The controller employs a manifold having a number of solenoid valve assemblies mounted thereto. The solenoid valve assemblies feature a low stacked height achieved through the configuration of the valves and various improvements in force output for the solenoid valve assemblies. The solenoid valve assemblies are held in an assembled condition through the action of a bracket assembly which has resiliently deflectable arms which bias against the valve assemblies. Preferably, non-removable fasteners are employed to affix the bracket to the manifold to prevent unauthorized attempts at servicing. The solenoid valve assemblies have protruding terminals which enable a circuit board to be laid against the solenoid valve assemblies such that the board is soldered along a surface opposite the valve assemblies.

Abstract: An electromagnet includes a lightweight movable body in the form of a hollow cylindrical body. The resistances of circulation paths for eddy currents flowing in the movable body due to electromagnetic induction are increased to suppress the eddy currents. Excitation coils are connected parallel to each other to reduce the coil inductance for increasing the magnetic forces to attract the movable body and the response thereof.

Abstract: An improved solenoid wherein the volume of a secondary air gap is increased during the plunger stroke, in order to reduce the increased plunger force that would otherwise occur during the plunger stroke.

Abstract: An electromagnetic actuator includes a core structure defining a central pole piece and an annular pole piece surrounding the central pole piece in spaced relationship. A winding is provided which when energized causes the pole faces of the pole pieces to assume opposite magnetic polarity to draw an armature towards the pole faces. A further winding is located about the annular pole piece and an annular core component surrounds the annular pole piece in spaced relationship and extends beyond the pole faces to form a radial air gap 23 with the armature.

Abstract: A magnetic core (3) surrounded by a coil (1, 2) bears a first pole shoe (4) forming a large-surface air-gap with two zones (5a, 6a) of two armatures (5, 6) fixed to one another and disposed magnetically in parallel.The core (3) is continued beyond the coil and at this end bears a second pole shoe (9) which together with two other zones (5c, 6c) of the armatures forms a second large-surface air-gap disposed magnetically in series with the first.

Abstract: A suction device, particularly intended for use as a soft-solder suction device in soldering operations. The suction device includes a housing (1) having a cylindrical chamber (2) and a suction pipe (11) connected to one end of the chamber. Arranged for axial movement in the chamber is piston (4). The piston is arranged to move extremely rapidly through the chamber, from a starting position located adjacent the suction pipe, in response to the release of a force acting automatically upon the piston. This piston movement creates a subpressure, which results in an effective suction effect at the tip of the suction pipe (11). In order to enable the suction device to be held absolutely still when movement of the piston (4) is initiated, the piston is arranged to be operated electromagnetically. The electromagnetic force is initiated by means of a switch which is separate from the suction device and which is foot-operated or arranged to be operated by some other part of the body.

Abstract: An actuating magnet comprises a magnet body (10), an exciting winding (15) rranged in the said magnet body (10) and a radially movable armature (17) having a pre-determined first radial cross-sectional surface. One end of the armature (17) having a second radial cross-sectional surface (19) substantially larger than the said first cross-sectional surface (20) forms a pole piece (18). Between the said pole piece (18) and a wall (11) of the said magnet body (10) which covers in the radial direction at least part of one end face of the said exciting winding (15) there is provided an air gap (20).In order to increase the actuating force of the magnet without changing its outer dimensions and to provide a closed system, the wall (11) covers the said end face of the exciting winding (15) and shields it magnetically, the pole piece (18) is arranged opposite to the inside of the said wall (11) and the air gap (20) extends in the radial direction (FIGS. 1a+b).

Abstract: The electromagnet comprises a fixed magnetic circuit, a mobile magnetic circuit forming, with the fixed magnetic circuit, at least one air gap and a coil. The distance over which the mobile magnetic circuit travels with respect to the fixed magnetic circuit is limited by at least one working position stop determining the working position, this stop being provided with at least one working position damper.

Abstract: A slot machine having multiple spinning reels coaxially mounted in a frame for relative rotation. All machine movements are electrically activated by pulling a starting handle. The handle operates an electric switch which, in turn, initiates sequencing of the machine by a processor.A spinning arresting mechanism for each reel is constructed as a unitary module which can be plugged into the machine or readily removed therefrom. The module includes start and stop solenoids cooperating with a single, spring-powered lever and associated linkage for guiding the lever through a three phase movement. During the first phase, the lever moves from its reel arresting position to its reel spinning position. During this movement, the lever engages a sprocket connected with the reel and thereby imparts rotational movement to the reel. In the second phase, the lever, after having completed the spinning of the reel, moves towards a cocked position where the lever rests out of contact with the sprocket.

Abstract: A DC current electromagnet is provided developing a high pulling force with reduced current consumption. This electromagnet has the form of a cylindrical pot and comprises a mobile armature which slides along a yoke piece through a closure air gap --e, S--, whose reluctance is low with respect to the reluctance of the working air gap --E, s-- when this latter is open and substantially constant during movement.

Abstract: A high speed current maximum tripping device, comprising a fixed core and a mobile core with complementary shapes and disposed in the same plane while defining an air gap therebetween. The fixed and mobile cores are obtained by flat stamping and have complementary profiles of a generally curvilinear shape with sides whose slope with respect to the main axis of the projecting core increases progressively from the nose towards the body.

Abstract: A proportional solenoid has a fixed pole piece 39 and a movable armature 45, both fitted into the bore 52 of a guide tube 36 that provides the required concentricity between the fixed and movable pole pieces 39 and 45. One of the pole pieces has a cylindrical recess 56 and the other pole piece has a reduced diameter cylindrical nose 62 that is complementary to cylindrical recess 56. A radially inwardly facing frusto-conical surface 95 is formed in cylindrical nose 62 to be disposed within recess 56 of the other pole piece and provide a frusto-conical pole piece section producing a linear force-stroke curve.

Abstract: An electromagnetic solenoid device comprises a plunger loosely fitted in a coil so as to be slidable in the axial direction by the actuation of the coil, wherein the plunger is placed in a through hole of the coil at the side of an end plate which is provided at an end of a yoke and the plunger has an inclined portion for increasing magnetic resistance between an end of the plunger and the end plate.

Abstract: In an electromagnet for an electric switch, particularly safety switch, an armature and a magnetic core are each formed of a pack of laminations connected to each other by rivets. The laminations of the armature and the magnetic core are equally shaped and formed so that the pack of laminations of the armature matches the pack of laminations of the core in assembly.

Abstract: An electromagnetic device comprises a stator structure having a central pole piece and axially spaced end pole pieces on opposite sides thereof. The device also includes an axially movable armature surrounding the stator structure and having a step which defines with said central pole piece an air gap extending in the direction of relative movement of the armature and stator structure. End portions of the armature define air gaps with the end pole pieces which extend normally to the axis of movement of the armature. The stator structure mounts a pair of windings on opposite sides of the central pole piece, the windings being connected so that when energized the magnetic flux due to the windings will flow in the same direction through the central pole piece.

Abstract: A cartridge solenoid poppet valve (10) arranged to use a single size pilot valve (31) with any one of a set of a plurality of different size sets of valve seat members (14) and poppet valves (24). Pilot guides (175) are provided having different transverse extents to accommodate such different size valve members. The valve further includes a flatted pilot guide (32) defining flow passages communicated between a transfer chamber (35) and a pilot valve chamber (30) in which the pilot valve (31) is disposed. A T-slot (58) is provided in the solenoid plunger (38) extending fully diametrically thereacross and the pilot valve includes a T-shaped connecting head (71) received therein. The plunger (38) and plug (41) define cooperating stop surfaces (67,70) for maintaining a small spacing between the plunger and plug at all times. Solenoid structure (53) includes a parallelepiped frame (46) defining a space with the solenoid coil (44) received therein.

Abstract: A proportional solenoid consisting of a stationary pole piece of ferromagnetic material which has a radially externally facing frusto-conical section surrounding a cylindrical recess in the stationary pole piece. Both the stationary pole piece and armature are fitted into the bore of a guide tube. Thus, the bore of the guide tube provides the required concentricity between the movable armature and the stationary pole piece. The movable armature is provided with an integral reduced diameter cylindrical nose that is complimentary to the cylindrical recess of the stationary pole piece.

Abstract: An electromagnetic device includes a stator having circumferential ribs which define grooves locating windings. An annular armature has internal ribs which extend into the grooves and the armature is divided along its length into at least two parts to enable assembly about the stator. The armature parts are secured at one end to an output member and at the other end are located by the wall of a surrounding body or a part carried thereby.

Abstract: The transducer comprises an armature and a core. Both pieces are E-shaped, and their geometrical dimensions are chosen so that when their central legs come into mutual contact, air gaps still exist between both pairs of outer legs where these face each other. A coil bobbin is fixed to the core and forms a straight guide for the central leg of the armature. The frontal surfaces of the outer legs are chamfered so that the limiting surfaces of the air gaps are inclined with respect to the travel direction of the armature. In order to minimize the hum, a short-circuit ring is embedded into the central leg of the core.

Abstract: A proportional solenoid consisting of a stationary pole piece of ferromagnetic material which has a radially externally facing frusto-conical section surrounding a cylindrical recess in the stationary pole piece. Both the stationary pole piece and armature are fitted into the bore of a guide tube. Thus, the bore of the guide tube provides the required concentricity between the movable armature and the stationary pole piece. The movable armature is provided with an integral reduced diameter cylindrical nose that is complimentary to the cylindrical recess of the stationary pole piece.

Abstract: A proportional solenoid has a fixed pole piece 39 and a movable armature 45, both fitted into the bore 52 of a guide tube 36 that provides the required concentricity between the fixed and movable pole pieces 39 and 45. One of the pole pieces has a cylindrical recess 56 and the other pole piece has a reduced diameter cylindrical nose 62 that is complementary to cylindrical recess 56. A radially inwardly facing frusto-conical surface 95 is formed in cylindrical nose 62 to be disposed within recess 56 of the other pole piece and provide a frustoconical pole piece section producing a linear forcestroke curve.