Abstract: A valve includes a housing, a solenoid arranged in the housing, a pin movable by the solenoid, a piston connected to the pin, and a seal. The piston is made of metal, has two regions oriented concentrically and parallel with respect to the pin axis and the seal is made of a different material than the piston. The seal is arranged in the crown region of the piston.

Abstract: The invention proposes an electromagnetically actuatable inlet valve (24) for a high-pressure pump, in particular of a fuel-injection system. The inlet valve (24) has a valve member (34) which can be moved between and open position and a closed position. An electromagnetic actuator (60) is provided, by means of which the valve member (34) can be moved, wherein the electromagnetic actuator (60) has an armature (68) which acts at least indirectly on the valve member (34), a magnet coil (64) which surrounds the armature (68), and a magnetic core (66) against which the armature (68) comes to rest at least indirectly when current is applied to the magnet coil (64), wherein the armature (68) is movably guided in a carrier element (78), and the carrier element (78) and the magnetic core (66) are interconnected.

Abstract: An electromagnetic valve, in particular for a motor vehicle air spring system, has a valve closing body which, in its basic position, shuts off a valve outlet and, for this purpose, is pressed against a valve seat by a restoring spring. To assist the opening process, a valve spring is also provided. The valve spring is supported at one side on a valve seat body and at the other side on a spring pot, which is arranged on the valve closing body. Preferably, a tubular section of the spring pot bears, non-displaceably in a lateral direction, directly against the valve closing body. An elastic sealing element may either be arranged on the end side of the valve closing body, or held laterally by a section, which forms an enclosure, of the spring pot.

Abstract: Differential-coil, high-voltage series reactors respond quickly and reliably to current surges in electrical power systems (such as surges caused by shorted or downed lines). The reactors prevent voltage collapse and eliminate the possibility of wide area blackouts (major metropolitan areas or entire states).

Abstract: An electromagnetic valve for an internal combustion engine includes a housing, an electromagnetic actuator arranged in the housing, the electromagnetic actuator having an electromagnetic armature and a core, a control element which is arranged to protrude axially out of the housing and which is connected to the electromagnetic armature so as to form a movable unit together therewith, the movable unit having a radial recess, and an arrangement which delimits an axial movement of the movable unit away from the core of the electromagnetic actuator. The arrangement includes at least one hook arranged on the housing. The at least one hook engages into the radial recess of the movable unit.

Abstract: An electromagnetic contactor has a pair of fixed contacts disposed maintaining a predetermined interval and a movable contact disposed to be capable of connecting to and separating from the pair of fixed contacts; and an electromagnet unit that drives the movable contact. The electromagnet unit includes a magnetic yoke enclosing a plunger drive portion; a movable plunger in which a leading end is protruding through an aperture formed in the magnetic yoke, and urged by a return spring; and an annular permanent magnet enclosing a peripheral flange portion formed on a protruding end side of the movable plunger, and magnetized in a moving direction of the movable plunger.

Abstract: A pressure regulator includes a pressurized fluid, direct-drive, balanced dual poppet valve assembly that requires no dynamic seals and is pressure balanced. Each poppet has a knife edge that creates a bubble-tight seal against a cooperating seat. The sealing knife edge of one poppet faces into the pressure, and the sealing knife edge of the other poppet faces away from the pressure. The pressure balance negates performance impact of high or low fluid pressure. Furthermore, the design provides for a controlled depth of deformation by the sealing knife edges of the poppets into the soft surfaces of the seats. With this arrangement, no dynamic seals are required, reducing the friction to a very low value. The valve assembly is actuated by solenoid that is optimized for light weight, high speed response, and low power consumption. The solenoid is designed to be immersed and operated within the pressurized fluid.

Abstract: An electromagnetic relay includes: an iron core that has an end face and a groove which goes across the end face; and a shading coil that is fitted in the groove; wherein the shading coil is fixed to the iron core by applying caulking processing to a plurality of areas in the end face which sandwich the groove.

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: 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 includes an electromagnet having a yoke and an operating coil supported by the yoke and connectable to a controllable current supply for effecting a current flow through said operating coil. An armature is movable from a first position remote from the pole face of the electromagnet to a second, pole face-engaging position in response to a first electromagnetic force generated by a current flow through the operating coil. A resetting spring is coupled to the armature and opposes the first electromagnetic force. Further, a circuit is provided which is formed of a braking coil supported by the yoke and a switching element having open and closed states. The circuit is closed in the closed state of the switching element and is in the open state of the switching element.

Abstract: An electromagnetic assembly, for example for a relay, has a magnetic core surrounded by an electrical coil, and an armature closing the magnetic circuit of the electromagnetic assembly. The magnetic core is of the split pole type having a first pole and a second pole, the former being surrounded by a shading ring to produce a phase shift in the magnetic flux in the region of the poles when the electrical coil is energized. A step is provided in the first pole between the shading ring and the armature so that the flux density, and thus the magnetic force, between the first pole and the armature is increased.

Abstract: An improved electromagnetic apparatus includes a core and an armature which is movable relative to the core. A shading ring is connected with the core to provide magnetic flux which is out of phase with magnetic flux from the core. The shading ring includes a base formed a first metal and a layer of a second metal clad to the base. The first metal forming the base work hardens and has a greater resistance to fatigue failure induced by vibration than the second metal of the layer which is clad to the base. However, the second metal forming the clad layer has a greater electrical conductivity than the first metal of the base. The base may be formed of aluminum and the layer of metal clad to the base may be formed of copper. The layer of copper may be clad to the base by an extrusion process.

Abstract: A relay apparatus which comprises an armature, means for pivotally mounting the armature, first and second pole pieces dimensioned, configured and disposed for cooperation with the armature, a magnetic circuit including at least one coil, a plurality of iron shunt lamina spanning the magnetic circuit intermediate at least one of the coil and the first and second pole pieces, and a plurality of copper washer slugs in the magnetic circuit intermediate at least one of the first and second pole pieces and the iron shunt lamina. The invention also includes a method of immunizing a relay from alternating current.

Abstract: An alternating current electromagnet with a magnetic core assembly is provided with a unique design for a sideplate. The sideplate has a slot with a lateral opening. In assembling the sideplate onto the side of the magnetic core, the slot receives a shading coil. A portion of the sideplate forming the slot extends across a channel formed in a pole face of the core to lock the shading coil into the channel along the sides of the core. The sideplate is formed in a C-configuration and interconnects two L-shape cores arranged in a C-configuration with a gap existing between the confronting faces of the lower legs of the cores.

Abstract: A voltage surge damping device for electromagnets is provided which applies more particularly to electromagnets of the type comprising a fixed magnetic circuit and a mobile magnetic circuit cooperating with the fixed magnetic circuit and forming therewith, in the "closed" position, at least one air gap. Said device comprises at least one short circuiting ring mounted on the fixed magnetic circuit and formed by a good electrically conducting and a magnetic metal sheet, and having at least one part shaped so as to extend into said air gap.

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 AC current electromagnetic relay is disclosed herein. The relay comprises a U-shaped armature with arms connected by a web and a generally E-shaped yoke with an elongated center leg and shortened side legs extending from a common base, the elongated center leg serving as a core around which a coil and a shading ring are disposed. The U-shaped armature is placed on the yoke with the free end edges of the arms being pivotally supported on the respective side legs of the yoke, so that upon the energization of the coil the armature is pulled toward the yoke and abuts against the respective free end portions of the side legs and the center leg, such free end portions being cooperative to define apexes of a triangle. Thus, a three-point contact can be attained between the armature and the yoke.

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: An electromagnet system for electromagnetic switchgear, the system having movable and stationary magnet portions, the stationary magnet portion having a pole surface wherein slots are provided for inserting a short-circuit ring. The slots are arranged so that the short-circuit ring may be substituted with a pole plate which extends beyond the pole surface on all sides. The pole plate has an opening which corresponds to the size of the pole surface. The opening is provided with two straps thereacross which can be inserted into the slots. This arrangement permits operation of the electromagnet system in response to AC, as well as DC, excitation.

Abstract: An electromagnetic valve comprises a valve case having incorporated therein a member for closing a fluid channel through the valve case, a stationary core, a movable core aligned with the core, an exciting coil surrounding the cores, a support member fixed to the valve case for guiding the movement of the movable core, and a shading coil provided on one end of the stationary core which end is opposed to the movable core. The movable core is movable by a magnetic attracting force generated by the exciting coil to thereby operate the closing member. The support member extends toward the stationary core, and the extension is integrally formed with a disk portion in contact with the surface of the small-diameter end and a projecting edge covering the periphery of the small-diameter end. This end is fitted in the projecting edge, which is welded at its forward end to the stationary core.

Abstract: Disclosed herein is an inexpensive tubular electromagnetic solenoid which employs stamped and drawn parts with a minimum of machined parts. The tubular housing is deep drawn and has a relatively light gauge side wall and an integrally formed end wall with apertures for pin terminals. A stamped flux enhancing disc is anchored exteriorly of the end wall and is swaged to a projecting portion of a pole piece located interiorly of the end wall. The flux disc-pole piece assembly rigidifies the housing end wall and the pole piece supports and positions one end of the bobbin. Stamped washers having axial apertures interfit into the end of the tubular housing and receive and support the other end of the bobbin. The bobbin has integrally molded pin terminal support bosses which project through apertures in the end wall and position and support the terminations.

Abstract: There is disclosed a solenoid of improved construction and a facile method for its manufacture. The solenoid is intended for use with cyclic voltage supplies and has a fixed-position pole assembly of a pole piece, shading ring and flux ring which is secured in a retaining sleeve. The pole piece has an annular groove which receives an inward, annular bead of the sleeve to retain the assembly. The sleeve is mounted within a solenoid casing within an annular coil and the casing is closed by an end closure plate which bears against the end of the sleeve. The inward annular offset of the sleeve provides a resilient axial compressability of the sleeve permitting facile assembly to precise tolerances.

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 laminated core for an A.C. electromagnet comprising its own die for the casting of shading coils therein. Retention grooves formed across the laminations and retention slots formed in side plates provide a continuous path for the injection of molten metal therein, thereby producing a closed-loop shading coil when solidified. Also disclosed is a method for making a core having a shading coil cast in situ.

Abstract: An improved arrangement for connecting a shorting ring to the pole of an AC switching magnet in which the connecting straps of the shorting ring are formed such that axis of the center of gravity of the shorting ring lies on a line coincident with the line between the connecting points thereby assuring that the joint receives as little stress as possible.