Abstract: Electromagnetic locking devices, systems, and methods are provided. The electromagnetic locking devices, systems, and methods are configured to lock an actuating arm of an actuator in any desired position between and including a fully extended position and a fully retracted position with respect to an outer cover of the electromagnetic locking device and/or system. The electromagnetic locking devices, systems, and methods described herein may include an unpowered deformable member that imparts fail-safe functionality thereto.

Abstract: A solenoid may include a core having a junction surface; a plunger having a junction surface and located adjacent to the core; a shading ring located proximate to an interface between the core junction surface and the plunger junction surface, the shading ring having an outside diameter slightly smaller than the diameter of the core, and operable to produce a concentration of magnetic attraction within an annular range of the interface between a center of the interface and a location of the shading ring; wherein a contact region between the core junction surface and the plunger junction surface is substantially smaller than the respective junction surfaces and located proximate to the annular range of the concentration of magnetic attraction.

Abstract: An electromagnetic actuator (20) comprises a stator (22), a piston (24), and a key (26). The stator comprises a stator frame (30) having an axial direction (32), the stator frame in turn comprising a magnetic member (50) and a base (52). The base (52) is separated by a gap (56) in the axial direction from the magnetic member (50) and positioned so that magnetic flux extending through the magnetic member (50) also extends through the base (52). The piston (24) is configured to reciprocate within the stator frame (30) in the axial direction (32). The key (26) is configured and position both to locate the base (52) with respect to the stator frame (and thereby provide the gap) and to absorb energy when the piston (24) strikes the base. A flux transfer flange (60) is configured to concentrate magnetic flux extending through the magnetic member (50) in a radial direction into the base (52).

Abstract: A solenoid may include a core having a junction surface; a plunger having a junction surface and located adjacent to the core; a shading ring located proximate to an interface between the core junction surface and the plunger junction surface, the shading ring having an outside diameter slightly smaller than the diameter of the core, and operable to produce a concentration of magnetic attraction within an annular range of the interface between a center of the interface and a location of the shading ring; wherein a contact region between the core junction surface and the plunger junction surface is substantially smaller than the respective junction surfaces and located proximate to the annular range of the concentration of magnetic attraction.

Abstract: The present invention provides a formed interface there between a magnetic core proximate an armature of an electromagnetically actuable device. A coil of the electromagnetically actuable device is selectively energized to draw the armature to the magnetic core. The formed interface is adapted to provide three contact areas in a triangular configuration at the mating surfaces of the armature and magnetic core which causes a minimal magnetic air gap and a stable interface there when the coil is energized. The formed interface overcomes the surface deformations of the armature and magnetic core to reduce vibration and noise.

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: An E shaped stationary magnet/moveable armature combination for use in an electromagnetic contactor. The magnet has three legs; two outer legs and an inner leg. The armature can be a single, essentially rectangular bar or have three legs corresponding to the legs of the magnet. The moveable armature is caused to contact the magnet by a magnetic field created when electrical current is applied to a current carrying coil. An outer leg of the magnet and/or armature is arranged such that an air gap remains between an outer leg of the magnet and armature. The provision of an air gap in an outer leg reduces noise emitted from the electromagnet.

Abstract: A magnet for control valve includes a housing having an inlet and an outlet for a pressurized fluid, a valve seat member having a conical inner surface valve seat, a spherical valve body adapted to be in line contact with the valve seat, a throttle adjusting plate made of a magnetic material shiftable toward and away from the valve seat, and an electromagnet for attracting and releasing the throttle adjusting plate to shift the valve body toward and away from the valve seat. According to the invention, a sheet, preferably made of urethane foam is arranged on a side of the throttle adjusting plate opposite to the valve body, thereby eliminating noise caused by self-oscillation of the valve body and throttle adjusting plate, while maintaining high responsibility as a magnet control valve.

Abstract: A solenoid is fitted with three dampers, two located on opposite sides of a flange in the solenoid and the third within the cell bore. The dampers allow movement of a plunger that supplies mechanical energy from electrical energy passed through the solenoid. The dampers absorb vibrational energy that would otherwise break apart the solenoid.

Abstract: An electromagnetic actuator in which a stator and an armature are opposed to move relatively. A plurality of coils are provided on the stator in the radial direction. A slit is formed on the armature in a radial direction and the flow of the eddy current in the circumferential direction is prevented.

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 low cost electromagnet assembly for a relay. The assembly includes an I-shaped stationary magnet that extends through a passage in a magnet coil and a U-shaped armature assembly with the armature assembly. The armature assembly includes a molded armature guide having projections on a rear wall of the guide arranged to actuate a plurality of switch plungers, side walls extending from the rear wall defining a cavity and an opening in the rear wall exposing a portion of the cavity at the rear wall side of the guide. The assembly also includes the U-shaped armature having a body portion positioned in the cavity and an elastomeric pad position between the armature body portion and the rear wall and a conical spring between the body and guide for absorbing shock created when the electromagnet is deenergized.

Abstract: A solenoid for use with an alternating current power supply has a stationary pole piece and a movable armature provided with an axially extending food means comprising in one embodiment a ring of nonmagnetic material and in another embodiment a plurality of ferromagnetic lugs on the end adjacent the pole piece. The lugs are disposed in peripherally spaced arrangement and extend axially from the armature in the region of contact with the pole piece to prevent rocking and orbiting buzz. The armature optionally includes a shading ring and/or slot extending a portion of the length thereof.

Abstract: A device for slowing down the movement of the armature within a solenoid comprising a resilient container having a predetermined internal volume, and a dilatant material filling the container which material has as one of its properties at ambient temperatures, a non-resilient deformation when subjected to slow steady state stress, and a highly resilient resistance to deformation when subjected to rapid shock-like stress, whereby the container is connected to the solenoid in a manner affording its compression as the armature moves within the solenoid.

Abstract: A switch construction having a support carrying switch contacts and an electrical coil that has an armature operatively associated with the switch contacts to cause a switching operation therewith when the coil is energized to attract the armature from a first position thereof to a second position thereof relative to the coil. A mechanical spring arrangement is operatively associated with the armature to continuously resist the movement thereof from the first position thereof to the second position thereof with an increasing force that overcomes the increasing pull in force of the energized coil on the armature before the armature reaches its zero gap with the energized coil whereby the spring arrangement prevents the armature from reaching its zero gap and thereby causes the switch construction to be relatively noiseless in the operation thereof.

Abstract: The invention relates to a moving-armature electro-magnetic device such as a plunger core electromagnet wherein a ring of a non-magnetic material with an appropriate anti-friction coefficient is placed between the armature and the seat which cooperates with said armature. Said ring permits to reduce to a minimum both the frictional forces and the remanence forces between said armature and said seat.

Abstract: In an a-c magnet in which slots are provided which run transversely to the direction of the laminations in the surface of at least one pole and in which a shorting ring is arranged with its long sides in the slots, the slots are caused to have mortized edges so that each long side of the spring is pushed on both sides toward the bottom of the slot. The shorting ring is thus caused to reliably rest at the bottom of the slot, and loosening and vibration of the shorting ring are thereby prevented.

Abstract: A slotted resilient wedging sleeve is slideably mounted on one end of a solenoid plunger in position to wedgingly coact with an inwardly chamfered edge on the adjacent axial end of the solenoid bobbin when the plunger is drawn into the bore of the bobbin by current flow through the coil. A compression spring on the end of the plunger urges the sleeve into wedging engagement with the chamfered edge and causes the inner periphery of the sleeve to take up any play between the bobbin and plunger, thereby eliminating buzzing of the plunger.