Abstract: The present invention relates to an electromagnetic stopper for stopping and/or separating out cargo carriers and/or cargo conveyed on a continuously operated cargo conveyor system, comprising: a bistable solenoid having at least one coil and at least one permanent magnet; a cam, which can be retracted and extended with the aid of the solenoid, one or more electrical energy stores, in particular capacitors, a controller, which, with the aid of switches, discharges the energy store(s) via the at least one coil of the solenoid such that the cam is extended.

Abstract: A band-pass filter device includes a waveguide filter, a first circuit board section, a first antenna, a second circuit board section, and a second antenna. The waveguide filter includes a high-pass portion, a connection portion, and a low-pass portion. The first antenna is disposed on the first circuit board section. The second antenna is disposed on the second circuit board section. A wireless signal generated by the first antenna is transmitted through the high-pass portion, the connection portion, and the low-pass portion of the waveguide filter, and then is received by the second antenna.

Abstract: According to an electromagnetic switch of the present invention, a crossbar operating in conjunction with a movable core slides in response to magnetization or demagnetization of an operating coil to cause attraction or separation between a fixed contact point and a movable contact point on the supply-side and between a fixed contact point and a movable contact point on the load-side. The electromagnetic switch further includes a first crossbar sliding part and a second crossbar sliding part, as well as a first casing sliding part and a second casing sliding part that allow the first and second crossbar sliding parts to slide. A contact between the first casing sliding part and the first crossbar sliding part or between the second casing sliding part and the second crossbar sliding part causes the crossbar on the side of the movable core to be tilted in a direction opposite to the direction of gravity with respect to the horizontal.

Abstract: An electromagnetic actuator, including: a ferromagnetic housing extending in a longitudinal direction with a height in a vertical direction perpendicular to the longitudinal direction; two coils arranged inside the housing, each including at least one winding around the longitudinal direction; a ferromagnetic member arranged between the coils; and a ferromagnetic plunger subjected to a magnetic field generated by the coils, the plunger movable in the longitudinal direction and to be immobilized in three different longitudinal positions depending on the field generated by the coils. The ferromagnetic member is rigidly connected to the housing and has, in the vertical direction, a size greater than one sixth of the height of the housing, and located at a distance smaller than one fourth of a gap in the longitudinal direction between the two coils, relative to a median plane perpendicular to the longitudinal direction and located at the midpoint between the two coils.

Abstract: The invention discloses a short circuit current hierarchical control tripping parameter circuit breaker. According to the invention, resistance of an alloy magnetic resistance body is changed through circuit current, and contract control can be carried out on short-circuit current. The control range of the circuit breaker can achieve that no magnetic resistance will be generated when current is no more than 8 times of rated operational current, and current limiting may be realized by the magnetic resistance when current is 8 times more than rated value. In this way, hierarchical control on short-circuit current of different levels of circuits can be carried out, and short-circuit current can be limited in a predetermined range, thereby restricting the short-circuit current in a predetermined range, solving a problem of power supply flickering, and avoiding large-area power failure accidents caused by override trip existing in an electrical control switch.

Abstract: An actuator has an electrically conductive coil which has a longitudinal axis and a plurality of turns and a magnet arranged at a distance from the turns in radial direction relative to the longitudinal axis. The coil is partially covered by a central region of a first conducting element on a side which faces away from the magnet and the magnet is partially covered by a mid region of a second conducting element on a side facing away from the turns of the coil. The first conducting element projects beyond the coil and the second conducting element projects beyond the magnet in the direction of the longitudinal axis and there each have collar-like projections. The coil has a first winding turns region and a second winding turns region.

Abstract: An electrical contactor is provided comprising a first terminal having a fixed member with at least one fixed electrical contact; a second terminal; at least one electrically-conductive movable arm in electrical communication with the second terminal and having a movable electrical contact thereon; and an AC dual-coil actuator having a first drive coil drivable to open and close the movable and fixed electrical contacts, and a second non-drive coil feedback connected to induce a reverse flux to temper and stabilize a net flux, thereby enabling control of a delay time of the opening and closing electrical contacts so as to be at or adjacent to a zero-crossing of an associated AC load current.

Abstract: Systems, methods, and devices are disclosed, including a compressor having a piston and a valve assembly. In some embodiments, the valve assembly includes a check valve having a valve member, a magnet coupled to the valve member, and an electrical conductor near the magnet. The check valve may be configured to change state in response to a change in fluid pressure. The compressor may also have an electric device coupled to the electrical conductor.

Abstract: A contact point device 1 includes a drive block 2 that has a drive shaft 25 to which a movable contactor 29 is attached, and drives the movable contactor 29. The movable contactor 29 is attached to the drive shaft 25 so as to be movable relatively to the drive shaft 25 in an axial direction of the drive shaft, and in addition, relative movement thereof in the axial direction is regulated due to abutment of the movable contactor 29 against a regulating portion 60. Then, between the movable contactor 29 and the regulating portion 60 is formed a rotational movement deregulating portion 80, which relaxes the regulation by the regulating portion 60 for the relative rotational movement of the movable contactor 29 in the axial direction.

Abstract: An improved solenoid having an enhanced magnetic field and failsafe operation is provided, wherein a primary winding and a secondary winding are constructed such that the combined force imparted on a plunger by both windings energized together is greater than the sum of the forces imparted by the primary and secondary windings energized separately, resulting in a smaller solenoid capable of providing a predetermined force, and providing a solenoid capable of tripping a circuit interrupting latch even if one of the windings is broken.

Abstract: A solenoid switching method includes energizing a first coil winding to cause a plunger to move in a first direction, and energizing a second coil winding to cause the plunger to move in the opposite direction. Furthermore, the plunger has a first standoff connected to a first end, and a second standoff connected to a second end. The first standoff extends through the first coil winding and the second standoff extends through the second coil winding. The bi-directional solenoid device is configured to physically move a slidable switch between a first position and a second position. Additionally, the plunger stays in position without either of the first coil winding or the second coil winding being energized if the plunger is latched.

Abstract: A solenoid includes a magnetic frame, a bobbin having a length, a hold coil, a pick up coil having a length, a fixed pole, a movable armature having a length, and a return spring biasing the armature away from the pole. The solenoid includes a pick up state when the armature and the pole are separated by a magnetic gap, and a holding state when the armature and the pole are proximate each other. The pick up coil is wound around the bobbin for a portion of the length of the bobbin and the hold coil is wound around the bobbin for a remaining portion of the length of the bobbin. The length of the pick up coil is about the same as the length of the armature and is less than the length of the bobbin.

Abstract: A valve (100) is provided. The valve (100) includes a base portion (10). The base portion (10) includes one or more solenoid coils (101A, 101B) and one or more cartridge receivers (104, 104?) coupled to the one or more solenoid coils (101A, 101B). The valve (100) also includes one or more removable cartridges (103). A removable cartridge (103) of the one or more removable cartridges includes a magnetic core (210) and a movable armature (211). A removable cartridge (103) of the one or more removable cartridges is adapted to removably engage the one or more cartridge receivers (104, 104?).

Abstract: A solenoid for a vehicle starter includes at least one coil with a passage extending through the coil in an axial direction. The solenoid further includes a plunger configured to move in the axial direction within the passage. The plunger includes a cylindrical outer surface with a substantially uniform diameter and a circumferential notch. The cylindrical outer surface includes a first portion with a first diameter on one side of the circumferential notch, and a second portion with the first diameter on an opposite side of the circumferential notch. The circumferential notch includes a portion with a second diameter that is less than the first diameter.

Abstract: A solenoid for a vehicle starter includes at least one coil with a passage extending through the coil in an axial direction. The solenoid further includes a plunger configured to move in the axial direction within the passage. The plunger includes a cylindrical outer surface with a substantially uniform diameter and a circumferential notch. The cylindrical outer surface includes a first portion with a first diameter on one side of the circumferential notch, and a second portion with the first diameter on an opposite side of the circumferential notch. The circumferential notch includes a portion with a second diameter that is less than the first diameter.

Abstract: Method for controlling the position of an electromechanical actuator for reciprocating compressor valves. The actuator includes a member (302) movable in a direction parallel to the direction for opening and closing the obturator of the valve (12), between a position corresponding to the closed position and a position corresponding to the open position of the obturator (11). The member (302) is provided with a mechanism (322) able to act on the obturator (11) and with a magnetizable portion (312) co-operating with two electromagnets (102, 202) and being arranged in equilibrium between the latter via a suitable mechanism.

Abstract: A starting switch structure including a body, plunger piston movable in the body, wherein the plunger piston has a first accommodating portion at an end of the plunger piston for accommodating an end of a guide pin moving reciprocally, the accommodating portion has a butting portion at the bottom surface, an excitation portion wound around the end of the plunger piston, and a butting part at an open end of the accommodating portion of the plunger piston, wherein a contact point is led to electrically connect the first terminal to the second in case that the plunger piston and the guide pin move in a first direction when the excitation portion excites, while a broken circuit is led between the first terminal and the second terminal in case the plunger piston and guide pin move in a second direction after the excitation portion has finished exciting.

Abstract: A plunger relay includes a movable actuating element on which a first solenoid actuator is acting in force-transmitting manner. The plunger relay has at least one second solenoid actuator, which is acting on the same movable actuating element in force-transmitting manner, and whose magnetic force is able to be set independently of the magnetic force of the first solenoid actuator.

Abstract: A solenoid for a vehicle starter comprises a spool including a first coil bay, a second coil bay, and an interior passage defining an axial direction. A first coil is positioned in the first coil bay of the spool, and a second coil positioned in the second coil bay of the spool. A plunger is positioned within the interior passage of the spool and configured to move in the axial direction when the first coil is energized. The first coil bay is positioned adjacent to the second coil bay in the axial direction. The spool further includes two end flanges and a middle flange. The middle flange separates the first coil bay from the second coil bay.

Abstract: A solenoid for a vehicle starter includes a pull-in coil made of a length of rectangular wire and a hold-in coil adjacent to the pull-in coil. A plunger is configured to move in an axial direction when the pull-in coil made of rectangular wire is energized. The pull-in coil and the hold-in coil are positioned on a spool with the plunger slideably positioned within a central passage of the spool. The plunger is configured to engage a plunger stop when the pull-in coil is energized. In at least one embodiment, the hold-in coil is separated from the plunger stop in the axial direction and the hold-in coil encircles the plunger stop.

Abstract: A solenoid for a vehicle starter includes at least one coil with a passage extending through the coil. A plunger is slideably positioned within the passage and configured to move in an axial direction between a first position and a second position. The plunger includes a substantially cylindrical outer surface portion with a circumferential notch formed in the outer surface portion. The at least one coil may include a pull-in coil and a hold-in coil wound on a spool. A plate member is positioned at one end of the spool and is separated from the plunger by a radial distance. The radial distance varies when the plunger moves in the axial direction as a result of the notch moving in relation to the plate member. A sleeve member may be coupled to the plunger such that the sleeve member covers the circumferential notch formed in the plunger.

Abstract: A solenoid for a vehicle starter comprises a pull-in coil and a hold-in coil positioned axially adjacent to the pull-in coil. A plunger is positioned within the pull-in coil and configured to move in an axial direction when the pull-in coil is energized. The plunger is separated from a plunger stop in the axial direction by an air gap when the pull-in coil and the hold-in coil are not energized. When the pull-in coil and hold-in coil are energized, a shoulder of the plunger moves in an axial direction toward the plunger stop. The pull-in coil is positioned in the solenoid such that it is removed from the plunger stop in the axial direction. In contrast, the hold-in coil encircles the plunger stop.

Abstract: An electromagnetic control mechanism (1) with an actuating element (15) which can move longitudinally and can be retained in three stable positions. By way of two coils (3, 4), the actuating element (15) can be switched to a first or to a second stable position, namely, the two opposed end positions. The actuating element (15) comprises an actuator rod (7) with a permanent magnet (8) arranged on the actuator rod (7), such that the actuating element (15) can be retained magnetically in the third stable position by the permanent magnet (8).

Abstract: A magnetically driven tool includes a shaft having a bottom application end including a contacting surface, at least one support around a portion of the shaft for supporting components positioned outside the shaft that float with respect to the shaft. A first magnet is affixed to the shaft. An electromagnet secured to the support is positioned outside the shaft and floats with respect to the shaft above the first magnet. At least one bearing is provided for sliding the shaft in an axial direction and optionally rotating the shaft. For pushing operations, the direction of current through the electromagnet is applied so that like poles relative to the first magnet face one another to provide a repulsive force, while for pulling operations unlike poles face one another. The magnitude of the current sets a force applied by the contacting surface to a workpiece.

Abstract: A valve having a valve body having spaced inlet and outlet ports separated by an intermediate valve seat in open communication with the inlet and outlet ports includes a piston and a valve member being adapted to sealingly mate with the valve seat. A biasing member is positioned to bias the valve member toward the valve seat. A linear motor assembly attached to the valve body, the linear motor having a plurality of stator discs, a plurality of stator coils, a plurality of teeth defining a cylindrical opening, and a slider positioned within the cylindrical opening. The slider has a plurality of teeth defining a generally cylindrical outer periphery of the slider and is movable in response to magnetic flux generated by electrical current passing through one or more of the stator coils.

Abstract: An infinitely variable multi-directional linear motion solenoid actuator (10) for use on printed circuit boards (12). The solenoid actuator includes wire coils (14) wound onto a bobbin (16) and a moveable magnetic armature (18) passing through a central bore (20) of the body. The armature is responsive to current passing through the coils to produce infinitely variable and reversible motion. Support posts (22) passing through the bobbin are used for electrical connection between the coils and the circuit board, as well as for mounting the actuator to the circuit board. The support posts may have solder heads on one end for surface mounting to the board, and may have plain heads on an opposed end for alternative through-hole mounting. A vacuum pick area (56) may be formed on one or both sides of the bobbin body to facilitate automated handling of the actuator.

Abstract: A solenoid for a vehicle starter includes at least one coil with a passage extending through the coil. A plunger is slideably positioned within the passage and configured to move in an axial direction between a first position and a second position. The plunger includes a substantially cylindrical outer surface portion with a circumferential notch formed in the outer surface portion. The at least one coil may include a pull-in coil and a hold-in coil wound on a spool. A plate member is positioned at one end of the spool and is separated from the plunger by a radial distance. The radial distance varies when the plunger moves in the axial direction as a result of the notch moving in relation to the plate member. A sleeve member may be coupled to the plunger such that the sleeve member covers the circumferential notch formed in the plunger.

Abstract: A Binary generator comprises a plurality of windings each being adapted to rotate between attracting magnetic fields generating current flow. The current flows through closed circuits to a multiple pole star electromagnet with all poles having similar torque exerting properties, both stages affixed to a common shaft and rotating in unison. The unidirectional flow of energy each half cycle relating to the magnets, not the wire, maintains a constant similar attitudes of sweeping fields of said poles to each half of an affixed coil of wire on the exterior of the rotating poles. Constant opposite striking of similar poles on each half of the coil induces a brushless current flow of energy that does not display a standard magnetic field around the conductor while the energy is in motion.

Abstract: A solenoid switching method includes energizing a first coil winding to cause a plunger to move in a first direction, and energizing a second coil winding to cause the plunger to move in the opposite direction. Furthermore, the plunger has a first standoff connected to a first end, and a second standoff connected to a second end. The first standoff extends through the first coil winding and the second standoff extends through the second coil winding. The bi-directional solenoid device is configured to physically move a slidable switch between a first position and a second position. Additionally, the plunger stays in position without either of the first coil winding or the second coil winding being energized if the plunger is latched.

Abstract: A switching contact, an electromagnetically operated electromagnet for driving the switching contact, and a drive power source device for driving the electromagnetically operated electromagnet. The electromagnetically operated electromagnet includes a movable core coupled to a movable contact of the switching contact, a fixed core located in a peripheral portion of the movable core, and coils wound around the movable core and the fixed core. Currents are supplied to the coils to drive the movable core. Capacitors store charges for supplying the current to the coils. Resistors are arranged in series with a path through which the capacitors are connected with the coils of the electromagnetically operated electromagnet and through which a current for closing operation flows. Capacitances of the capacitors and values of the resistors are controlled to adjust a supplied current characteristic to the electromagnetically operated electromagnet.

Abstract: An internal combustion engine includes an electromagnetic valve actuator having an armature between upper and lower electromagnets with a stem extending through one electromagnet and guided by a bushing with increased clearance about at least a portion of the inner circumference in at least a middle portion of the bushing to reduce oil shear length and associated viscous friction in the actuator. A two-piece intake/exhaust valve guide includes a lower half with a stepped outer diameter cooperating with a counter-bored hole in the cylinder head to provide a positive stop. The upper and lower halves of the valve guide have increased clearance relative to the valve stem around at least a portion of the inner circumference to reduce oil shear length and associated viscous friction. Reducing viscous friction of the actuator and associated valve guide improves system robustness by decreasing the system sensitivity to temperature.

Abstract: Actuation for control of surfaces is provided through use of a conducting material comprising electrolyte particles electrically charged with electromagnetic fields in boundary layers. Interactions of the electrically charged particles with electromagnetic fields in boundary layers are coordinated for generation of control forces for various applications.

Abstract: An actuator includes: a base member; a first slider that is placed slidably in a first axial direction with respect to the base member; a second slider that is placed slidably in a second axial direction with respect to the base member, the second axial direction being perpendicular to the first axial direction; a moving piece that is placed at a crossing point between the first slider and the second slider, and is capable of moving in a plane, the moving piece being slidably engaged with the first slider and the second slider; a magnet that is fixed to one end of the first slider, and a magnet that is fixed to one end of the second slider; and coils that are designed to allow the magnets to move inner spaces thereof.

Abstract: A plunger relay includes a movable actuating element on which a first solenoid actuator is acting in force-transmitting manner. The plunger relay has at least one second solenoid actuator, which is acting on the same movable actuating element in force-transmitting manner, and whose magnetic force is able to be set independently of the magnetic force of the first solenoid actuator.

Abstract: An electromagnetic coil apparatus includes a ferrous coil frame having a first end and a second end opposite the first end. A coil assembly includes a conduit, a number of coils within the ferrous coil frame and being disposed on the conduit, and a ferrous plunger movable in the conduit. A first ferrous heel member is disposed proximate the first end of the ferrous coil frame. A second ferrous top plate member has an opening and is disposed proximate the second end of the ferrous coil frame. A magnetic flux enhancer is external to the conduit and is at least partially external to the ferrous coil frame. The magnetic flux enhancer includes a ferrous conduit coupled to the second ferrous top plate member and cooperates with the opening thereof to form a passageway. A portion of the ferrous plunger of the coil assembly passes through the passageway.

Abstract: A solenoid actuator includes a pair of coils and a core body. The pair of the coils are coupled electrically to each other in series. The core body has a pair of magnets and a holding member, and moves with respect to the coils when the pair of the coils apply magnetic force to the pair of the magnets in substantially same direction. The magnets are inserted into the coils respectively. The holding member holds the pair of the magnets in common.

Abstract: A solenoid actuator includes an electrical circuit with a first power input terminal, a second power input terminal, a first coil wound around a first axis and configured to generate a first magnetic field while electrical current flows through the first coil, and a second coil wound around a second axis configured to generate a second magnetic field while electrical current flows through the second coil. An electric switch connects or disconnects the first coil and second coil in series or parallel. Thus, the electric switch can energize or de-energize the second coil. A movable member, such as a rod, bar, spool, or hollow tube, influenced by the magnetic fields generated by the first and second coils is configured to move with respect to the first and second coils from a first position to a second position in response to the magnetic field generated by the first coil.

Abstract: An inline electromagnetic tool actuator incorporates an actuator housing, an elongated armature, a tool assembly, spaced-apart return magnets, at least one drive magnet, and at least one magnet wire. The elongated armature is located inside the housing, and is adapted for reciprocating linear movement along a notional assembly axis. The tool assembly is operatively attached to the armature. The return magnets are located inside the housing, and are coaxially aligned with the armature. The return magnets have respective inward facing surfaces defining respective magnetic poles. The drive magnet is affixed to the armature, and is arranged between the return magnets. The drive magnet has opposing outward facing surfaces each of like polarity to adjacent inward facing surfaces of the return magnets. The magnet wire is coiled about the armature.

Abstract: An electromagnetic coil apparatus includes a ferrous coil frame having a first end and a second end opposite the first end. A coil assembly includes a conduit, a number of coils within the ferrous coil frame and being disposed on the conduit, and a ferrous plunger movable in the conduit. A first ferrous heel member is disposed proximate the first end of the ferrous coil frame. A second ferrous top plate member has an opening and is disposed proximate the second end of the ferrous coil frame. A magnetic flux enhancer is external to the conduit and is at least partially external to the ferrous coil frame. The magnetic flux enhancer includes a ferrous conduit coupled to the second ferrous top plate member and cooperates with the opening thereof to form a passageway. A portion of the ferrous plunger of the coil assembly passes through the passageway.

Abstract: Electromagnetic actuator for operating at least one movable contact of a switch into a switched-on position or a switched-off position. The electromagnetic actuator (1) has a first magnetic circuit for making a movable (3) and a fixed (4) pole body move towards one another and a second magnetic circuit, separate from the first magnetic circuit, with a permanent magnet (9) and a retaining plate (10). A switching-off coil (15) operates to counteract the magnetic field in the second magnetic circuit so that the actuator (1) can return to a switched-off position. In the axial direction of the actuator (1), the switching-off coil (15) is positioned Gloser to the retaining plate (10) than the permanent magnet (9), as a result of which more effective operation of the actuator is possible. Furthermore, the actuator is constructed from cylindrical elements that are easy to produce and to assemble.

Abstract: An actuator assembly comprised of: a first coil and a second coil, each with a bore and a producing a magnetic flux when subject to an electric signal; a tube extending through the bores such that coils are coaxial; a magnetic pole piece within the tube and generally between the first bore and the second bore; a magnetic ring set outside of the tube and between the coils, in which the magnetic flux paths both travel through the magnetic pole piece and the magnetic ring to complete their respective magnetic paths; and a first and second axially translatable movable member within the tube and wherein the movable members each axially translate towards the magnetic pole piece in the presence of the magnetic flux such that by controlling the electric signal, proportionality can be achieved.

Abstract: A method and apparatus are disclosed for monitoring a linear position, such as the distance between a sensing element and a movable object, and/or related parameters, such as displacement, direction, speed, velocity, and/or acceleration. The method utilizes a sensing element and an electrically conductive portion of the movable object, or a conductive target coupled to the movable object. The apparatus includes at least one sensing element formed by a section of a coupled slow-wave structure. The sensing element is connected to an RF or microwave generator, and an electronic circuit that converts at least one electromagnetic parameter of the section of the coupled slow-wave structure into a position reading. Electric and magnetic fields excited in the sensing element are split so that most of the electric energy is concentrated inside of the sensing element, while most of the magnetic energy is concentrated outside of the sensing element.

Abstract: The injector has a cylindrical body, which houses an injection nozzle regulated by an injection valve provided with a moveable pin, a fuel supply line, an injection chamber communicating with the supply line, housing a lower portion of the pin and delimited below by a valve seat of the injection valve, a control chamber communicating with the supply line and housing an upper portion of the pin, and a control valve, which is capable of putting the control chamber in communication with a drain for the low-pressure fuel and is controlled by an electromagnetic actuator provided with a pair of electromagnets identical with each other and arranged mechanically in series with each other so that their respective thrust forces are added together.

Abstract: An electromagnetic actuator for operating a final control element has at least one solenoid which is arranged in a housing and acts upon an armature constructed of laminations oriented essentially toward control element. The control element may be a charge cycle valve. At least one lamination of the armature has at least one passage opening which forms a duct for transporting a medium.

Abstract: A solenoid end cap assembly having a flat mating surface. The flat mating surface is a single planar mating surface and is designed to mate with a substantially flat mating surface of a valve control body. The solenoid, housed within the solenoid end cap, does not protrude past the flat surface and may form part of the substantially flat mating surface of the solenoid end cap. The flat mating surfaces of the valve control body and the solenoid end cap assembly eliminates the need for ring dowels in the assembly between the solenoid and the valve control body. This reduces manufacturing costs and assembly time. The flat mating surfaces also provide a uniform mounting surface for the solenoid from injector to injector. This increases performance characteristics, as well as increases thermal conductivity and magnetic conductivity characteristics.

Abstract: A flow control valve utilizing at least one permanent magnet and at least one magnetic coil, wherein one or more permanent magnets or magnetic coils are used to move a movable member in towards and/or away from an inflow port so as to control the flow through the port. When multiple permanent magnets are used, at least one yoke, which protrudes beyond the edges of the magnets, is place between each pair of magnets. A fixed shaft that passes through a hollow portion of the movable member is used to control the movement of the movable member, and an air vent is present near the end of the movable member that is closest to the inflow port such that the hollow space of the movable member does not form a vacuum.

Abstract: An electromagnetic actuator includes a stationary member, a movable member magnetically coupled with the stationary member with a gap therebetween, and a support member for displaceably supporting the movable member relative to the stationary member. Both the stationary member and the movable member have a core section carrying a coil wound around its periphery. As the coil of the stationary member and that of the movable member are energized with electric current, the movable member is either attracted toward or repulsed from the stationary member. The electromagnetic actuator can be used for an optical scanner by providing a mirror and a lens on the movable member.

Abstract: A linear switch actuator for actuating a movable element within a microwave switch includes a ferromagnetic shield, a coil positioned within, and a movable armature assembly positioned within the coil. The armature assembly is coupled to the movable element and includes a ferromagnetic rod and first and second permanent magnets. The permanent magnets are coupled on either end of the rod and have opposite pole orientations. The armature assembly moves between first and second stroke end positions. When one of the permanent magnets is positioned substantially outside the shield, the magnetic permeance of the armature assembly is maximized, and the armature assembly experiences bi-stable latching between the two stroke end positions.

Abstract: An electromagnetic fuel injector of an internal combustion engine having a plurality of electromagnetic coils for valve driving wound separately on a bobbin in an axial direction. The bobbin has a step difference of the outer diameter so that the bobbin outer diameter in the region with the second coil to be wound thereon is smaller then the bobbin outer diameter in the region with the first coil to be wound thereon, and the bobbin inner diameter has a step difference in that the bobbin inner diameter in the region with the first coil to be wound thereon is made large partially so as to secure an annular space to interpose a seal ring therein.

Abstract: A ferromagnetic actuator having, in a housing, a ferromagnetic circuit defining an axial travel interval for an armature (22) of ferromagnetic material for axially driving a rod between two extreme positions in which the armature bears against poles of the ferromagnetic circuit, resilient return means provided to hold the valve at rest in a middle position between the extreme positions, and at least one coil carried by the circuit and enabling the armature to be brought in alternation into both positions. The rod carries a radially-magnetized bar of length not less than the travel distance of the armature, and the housing carries at least one magnetic flux sensor placed in a zone having low exposure to the field created by the coil(s).