Abstract: An electro-mechanical system has a solenoid with a plunger received in a housing chamber. A plunger portion extends outwardly of the housing. There is at least one coil, and a control for the at least one coil. The control selectively applies a first higher level current to the coil to move the plunger to an actuated position relative to the housing. The control is operable to stop the supply of first high level current to the at least one coil and allow the plunger to move to an un-actuated position. The control is operable to supply a partial power current to the at least one coil when in said un-actuated position to resist movement of the plunger. A method is also disclosed.

Abstract: The present invention concerns a door-lock device for a household appliance, said door-lock device comprising a mechanical unit, provided with a movable member, such as a slider and the like, capable of assuming a releasing position, in which it allows the opening of said door, and a locking position, for retaining said door when closed, and a control unit connected with the control logic of said household appliance, comprising a locking pin capable of assuming at least one position, in which it is disengaged from said movable member, and an extracted position, in which said locking pin is capable of engaging with said movable member, when the latter is in said locking position, said movable member being capable to pass from said locking position to said releasing position when said locking pin is disengaged from it.

Abstract: An electromagnetic actuator with an armature unit (18) that can be driven relative to a stationary core unit (10) in reaction to the application of current to a stationary coil unit (14), which armature unit has a permanent magnetic agent (28) as well as a plunger unit (31), designed so as to interact with an actuation partner, guided out of a magnetically flux-conducting housing (35), wherein, on the outer surface of a shaft section (20) of the armature unit (18) a magnetically non-conducting bushing agent (32) is provided such that in a zero applied current state of the coil unit (14) a permanent magnetic flux (40) of the permanent magnetic agent (28) flows through the core unit (10) and the shaft section (20) so as to hold the armature unit (18) on the core unit (10), and in a state of the core unit (14) in which current is applied the permanent magnetic flux (40?, 40?) is displaced out of the core unit (10) into a housing section (50, 52) of the housing and a permanent magnetic flux circuit is closed by a

Abstract: A clutch pedal apparatus for a vehicle for reducing effort may include a rear fixed magnet and a front fixed magnet respectively fixed at an initial position and a last position of a movement section of a pushrod with a predetermined distance in a cylinder housing included in a clutch master cylinder, and a moveable magnet coupled to the pushrod disposed between the rear fixed magnet and the front fixed magnet, wherein the moveable magnet guides complete restoration of a pedal arm via magnetic force with the rear fixed magnet during an initial manipulation and reverse restoration of the pedal arm and generates a turnover force via a magnetic force with the front fixed magnet during a full stroke manipulation of the pedal arm.

Abstract: The present invention discloses a planar torsion spring for a robot joint, including a torsion spring outer ring, a torsion spring inner ring and a plurality of elastic bodies; the elastic bodies are uniformly distributed around the circumference and connected with the torsion spring outer ring and the torsion spring inner ring respectively at their two ends; each elastic body is composed of two symmetrical elastic body units, each elastic body unit includes an outer circular hole slot, an inner circular hole slot and a connecting beam; the connecting beam connects respectively between the torsion spring inner ring and the inner circular hole slot, the inner circular hole slot and the outer circular hole slot, the outer circular hole slot and the torsion spring outer ring; a wide-angle deformation of the torsion spring is achieved through a series of elastic deformation of the inner and outer circular hole slot.

Abstract: A switch for an electrical circuit includes a base, a rotatable cam having a first profile and a second profile, a solenoid, a link, and a member comprising a cam follower configured to follow the second profile. A first cycle of the solenoid includes a first energized state and a first de-energized state and the second cycle of the solenoid includes a second energized state and a second de-energized state. A first portion of the link couples to the solenoid, and a second portion of the link movably couples to the first profile of the cam. When the solenoid is in a first cycle, the member moves from a retracted position to an extended position, and when the solenoid is in a second cycle, the member moves from the extended position to the retracted position.

Abstract: To address the need for efficient and reliable testing of integrated devices, system on chips, and computers, deterministic behavior for an interface is accomplished by fixing variation in latency associated with receiver and transmitter data stream. The interface may be a serial interface that is PCIe compliant and corrects latency variations in the receiver that consequently results in deterministic transmit data. Consequently, the data received and/or transmitted is predictable with respect to time and facilitates testing and validation of the devices and logic associated with the interface.

Abstract: An electromagnetic actuating device, in particular camshaft adjustment device, having an armature unit (14) which can be driven in the axial direction or parallel thereto in reaction to energization of a stationary, axially oriented coil unit (10) and is designed to interact with a slide and/or plunger unit (16) which extends in the axial direction, in particular a plunger unit which brings about camshaft adjustment of an internal combustion engine, wherein permanent magnet means are provided on and/or in the armature unit and/or the slide or plunger unit, and the coil unit and armature unit are accommodated at least partially in a housing unit or carrier unit.

Abstract: A rotationally-operated input device includes the following elements: (a) a magnetized cylindrical rotary magnet; (b) an operating shaft having the rotary magnet inserted and held thereon; (c) an upper case and a lower case for sandwiching the operating shaft therebetween rotatably; (d) an insulating substrate for fixing and holding the lower case; (e) a detection element mounted on the insulating substrate, for detecting rotation of the rotary magnet in a non-contact manner; and (f) a fixed magnet for generating an attractive and repulsive force between the fixed magnet and the rotary magnet. This structure allows detection of a rotation state of the operating shaft and provides click-feeling at rotating operation, in a non-contact manner. Thus a long-life small rotationally-operated input device can be provided.

Abstract: A guide for a permanent-magnet linear actuator, of the type comprising a row of permanent magnets which are arranged side by side and substantially parallel and equidistant. The guide is constituted by a series of modular elements which can be interconnected in the direction of extension of the guide with interlocking elements for simplified fixing.

Abstract: Provided is a weight control system that can include: an upper plate positioned in a lower portion of the system; at least one of, a first magnet or a first electromagnet, configured to be concentrically engaged with the upper plate; an upper internal core; a coil; and an upper plate housing configured to receive the upper internal core and the coil, the upper plate housing being coupled to at least one of, the first magnet or the first electromagnet, wherein, when power is supplied to the system, an induced current is generated in the upper internal core and the coil to create a first centrifugal magnetic field configured to rotate the upper plate and at least one of, the first magnet or the first electromagnet.

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 system is provided for positioning an article. In this regard, one embodiment of the system, among others, can be broadly summarized as follows. The system contains a frame and a series of actuators connected to the frame, where the series of actuators contains at least one armature therein. The at least one armature is connected to an article and the series of actuators provides a force on the at least one armature to actuate movement of the at least one armature, thereby causing movement of the article. Each actuator further contains at least one winding set capable of providing a coil flux, at least one permanent magnet capable of providing a permanent magnet flux, and a magnetically conductive core having the permanent magnet therein and at least a portion of the at least one winding set therein. The series of actuators provides the at least one armature and the article with more than one degree of freedom.

Abstract: A security device, according to various aspects of the present invention, detects removal of the device from a provided surface. The security device includes a body; at least one magnet coupled to the body; and a sensor coupled to the body proximate to at least one of the at least one magnet. The sensor does not move with respect to the at least one magnet. The at least one magnet magnetically couples the body to the surface. Each one magnet provides a magnetic flux. When the body couples to the surface, at least a portion of the magnetic flux conducts away from the sensor. When the body is not coupled to the surface, at least a portion of the magnetic flux from at least one magnet of the at least one magnet conducts through the sensor thereby indicating removal of the body from the surface.

Abstract: An actuating magnet is disclosed comprising an actuating means (2) for exerting a tensile or pressure force on a target element that is to be moved, switched, or latched or unlatched, and comprising a latching means for latching the actuating means (2) in a desired position, the latching means having a locking magnet (11) for locking and unlocking the actuating means (2).

Abstract: An apparatus, according to various aspects of the present invention, that couples a provided security device to a provided portal cover and communicating between a first side and a second side of the portal cover. The security device includes a first magnet and a second magnet. The apparatus includes a second device, a first metal fastener, and a second metal fastener. The first metal fastener has a first end portion and a second end portion. The second metal fastener has a third end portion and a fourth end portion. The first end portion and the third end portion are positioned on a first side of the cover. The second end portion and the fourth end portion are positioned on a second side of the cover. The first magnet and the second magnet magnetically and electrically couple to the first end portion and the third end portion respectively thereby coupling the security device to the cover. The second device electrically couples to the second end portion and the fourth end portion.

Abstract: An apparatus for releasably attaching a pushing tool to one work piece such that a pushing force can be applied to a second work piece and allow alignment of the two work pieces for joining the work pieces together.

Abstract: An auto-aligning and connecting structure used to connect and align an electronic device and an accessory, wherein a plurality of first magnetic bodies are disposed on a first surface of the electrical device and a plurality of second magnetic bodies are disposed on a second surface of the accessory. The magnetic pole of the first magnetic bodies and the second magnetic bodies are appropriately arranged so the first magnetic bodies and the second magnetic bodies can attract each other when the first surface and the second surface approach each other. Then, the electronic device and the accessories are connected to each other when the first surface and the second surface connect.

Abstract: The main body of the actuator structure is generally formed into a “pitchfork”shape. The middle bar of the pitchfork forms a Y-bend at its forward end. The Y-bend is disposed so that each tip of the bend is adjacent to the outer bar on each side of the pitchfork. At least a coil is fixed on each bar of the main body. The forward ends of the Y-bend abut against a movable member. In the structure above, applying a current to a coil generates minute movements in each tip of the Y-bend, thereby moving the movable member.

Abstract: This invention describes a compact linear moving coil actuator that incorporates a piston bobbin coil assembly that provides a shaft with linear reciprocal movement. Optionally, a rotary motor can be coupled to the shaft to provide rotary reciprocal movement. The piston and bobbin sections of the piston bobbin coil assembly may be integrally formed as a single unitary piece and easily changed in size and/or configuration during manufacture to enable easier and more cost-effective assembly of various actuator sizes and configurations. Additionally, the compact size of the actuator requires less work space and also allows multiple actuators to be positioned next to each for various applications.

Abstract: An apparatus capable of producing a moveable magnetic field includes a moveable support structure (110) and a magnetic field source (120) supported by the moveable support structure, where the magnetic field source is in a fixed position relative to the moveable support structure. The magnetic field source generates a magnetic field at a wafer surface of at least approximately 50 Oersted, and the magnetic field is aligned so as to produce magnetic anisotropy in a plane of the moveable support structure.

Abstract: A pin lock is movably mounted for linear movement along a longitudinal axis. A magnet, preferably a permanent magnet, is mounted for limited rotation between the pin extended and pin retracted positions. An electromagnet provides a controllable electromagnetic field which encompasses at least a portion of the permanent magnet. A ferromagnetic latch is located within the magnetic field of the mounted magnet in each of the pin extended and pin retracted positions. A mechanical interconnection between the pin lock and the permanent magnet for moving the pin lock when the permanent magnet is rotated wherein the movement extends or retracts the pin lock between its pin extended and pin retracted positions. Reversing the electromagnetic field of the electromagnet serves to rotate the magnet so that the pin lock moves from one to the other of the two positions.

Abstract: A pin lock is movably mounted for linear movement along a longitudinal axis. A magnet, preferably a permanent magnet, is mounted for limited rotation between the pin extended and pin retracted positions. An electromagnet provides a controllable electromagnetic field which encompasses at least a portion of the permanent magnet. A ferromagnetic latch is located within the magnetic field of the mounted magnet in each of the pin extended and pin retracted positions. A mechanical interconnection between the pin lock and the permanent magnet for moving the pin lock when the permanent magnet is rotated wherein said movement extends or retracts the pin lock between its pin extended and pin retracted positions. Reversing the electromagnetic field of the electromagnet serves to rotate the magnet so that the pin lock moves from one to the other of said two positions.

Abstract: A magnetic motion device is disclosed, wherein a permanent magnet slides back and forth along a pivoting rail due to the interaction between the slide's magnetic field, the magnetic fields produced by a permanent/electromagnet combination at each end of the rail, and gravitational force. The ends of the rail thereby move up and down in a reciprocating, “see-saw” fashion. Power-take-off mechanisms can be connected in any suitable manner to the device, so that the motion of the rail can power an external device such as a pump.

Abstract: The invention is based on an electromagnetic actuator, especially for activating a valve, having at least one electromagnet (10) that acts on a correspondingly designed armature surface (20) of a moveable armature (22) in a first effective range (12) by way of at least one first conical and/or stepped pole face (18) using a magnetic field (16) generated by at least one coil (14). It is proposed that the electromagnet (10) act on a corresponding armature surface (28) by way of at least a second pole face (26) in at least a second effective range (24).

Abstract: A leaf spring for urging a spool toward a flange part of a yoke is provided between a guide fixed to a housing and the spool. Owing to the urging force of the leaf spring, the spool is pressed against the flange part of the yoke, and the yoke can be pressed against the cover through the spool. Thus it is possible to prevent the spool and the yoke from loosening. Further because the leaf spring is provided for each magnet valve, the leaf spring can be commonly used for respective modes of a fluid control apparatus and thus the cost can be reduced.

Abstract: A drive motor for an infusion pump system includes a novel outer housing which includes a unitary member which defines a cavity adapted to receive a winding wherein the housing cavity has a length at least as long as length of the winding. In one embodiment, the housing unitary member has an opening at one end and is adapted to receive a housing end member which has a guide track for an armature. Such an arrangement facilitates assembly and disassembly of the motor for fabrication, inspection and repair purposes yet also facilitates proper alignment of the components when assembled. In another aspect, a push member positioned to be engaged by the armature has an engagement face which is at least 40% of the width of the armature engagement face. In still another aspect of the present inventions, the armature head portion is wider than the armature stem portion and has a length at least 10% of the winding length.

Abstract: The even system electricity induction operation medium of this invention has 3 halogen atoms, especially fluorine atom into a/the molecule at least it is the even system electricity induction operation medium including one kind of liquid state organic compound at least. A even system electricity induction operation medium about-the electric conduction rate under the operation environment temperature are the electricity induction operation medium that, is in the range of 4×10−10˜5×10−6S/m and the surface tension of the even system electricity induction operation medium under the operation environment temperature are 22 dyn/cm following. This even system electricity induction operation medium is difficult combustion or noninflammable nature. This even system electricity induction operation medium is difficult combustion or noninflammable.

Abstract: An interrupted annular solenoid activator for use in well or subsea tools is provided. An interrupted annular armature member of a ferromagnetic material has a wire coil wound about it. A separate curved annular segment of the generally toroidally shaped armature is mounted for axial motion in the direction of the axis of revolution of the annular toroidally shaped member. Passage of electrical current through the coil causes axial motion (reciprocal) of the separate annular curved segment. This motion is coupled to a hydraulic pump piston in a preferred embodiment.

Abstract: On a known electromagnetic actuator for valve control of an internal combustion engine an armature (1) is moved by magnetic force between the pole faces (21, 31) of an opening magnet (2) and a closing magnet (3) to activate an intake/exhaust valve (5). Owing to the work that has to be done when the intake/exhaust valve (5) is opened in order to counteract the high internal gas pressure in the combustion chamber the opening operation takes longer than the closing operation. The disclosed actuator permits faster opening of the intake/exhaust valve (5), in that the magnetic force exerted by the opening magnet (2) is increased for large stroke lengths (d.sub.o) in comparison with the magnetic force exerted by the closing magnet (3) on the armature (1) in conjunction with the same stroke length (d.sub.s) by the provision of a two-section connecting sleeve (7) enclosing the space between the pole faces (21, 31).

Abstract: An electromagnetic actuator assembly is described which comprises a stator housing having a slot extending across the diameter thereof. A stator core is located within the slot, the core carrying a coil. The core is conveniently shaped to permit the use of an increased diameter coil and to increase the area of the pole faces of the core.

Abstract: A drive device with an electric motor with permanent magnets and a pole top more particularly for use with servo drives in motor vehicles. A relay is provided for switching the motor current with at least one electromagnet, which contains a relay coil and a relay armature, and with at least one relay contact. The relay is mounted in the pole top of the electric motor and the magnetic field lines of the electromagnets are closed through the permanent magnets and the pole top of the electric motor.

Abstract: A magnetic actuator design and method of use is provided that generally reduces problems associated with conventional actuators and can be specifically employed to increase the accuracy of actuator type precision operations, such as surface mounted electrical component placement, die and attach tooling movements, and tape and reel part storage tooling. The actuator includes a housing, a stem slidably disposed and having a rest position within the housing, a first magnetic portion attached to the stem and, a second magnetic portion attached to the housing, the second magnetic portion being of sufficient strength and oriented to exert a generally predetermined force on said first magnetic portion sufficient to resist displacement of said stem from said rest position.

Abstract: An electromagnetic linear drive has a stationary unit, a mobile unit centered and coaxially placed with respect to the stationary unit and an enclosing assembly made of diamagnetic material to support and protect the stationary unit and the mobile unit. The stationary unit contains a coil, wound around a bobbin made of non-conductive and diamagnetic material including a stationary magnet coaxially attached to the lateral face of the bobbin. The mobile unit includes a mobile magnet fastened to a shaft made of diamagnetic material which holds, positions and further transfer the linear motion of the mobile magnet to the driven device. Two stationary units are used to obtain controlled movement in both direction. The permanent magnets are magnetized in the direction of their thickness, coaxially positioned and arranged to repulse each other. The coils are connected in series with the magnetic fields opposed.

Abstract: A magnetic latching solenoid assembly comprises a bobbin having a central aperture formed therethrough along a central axis and having a solenoid coil wrapped therearound, and a metal polepiece secured at least partially within the bobbin. An at least partially metal armature is slidably movable within the central aperture. The polepiece includes a depression formed therein with a first flat formed at the bottom of the depression. The depression has a first wall formed at a first angle with respect to the central axis. The armature has a protruding portion for cooperation with the depression, the protruding portion having a second flat formed thereon for metal-to-metal engagement with the first flat, and having a second wall formed at a second angle greater than the first angle so that the first and second walls do not contact each other when the first and second flats are in contact.

Abstract: A holding device and a transmission shift interlock mechanism employing the holding device. The holding device is intended to immobilize a cable and includes a generally cylindrical electromagnet with a central passageway extending therethrough and a holding assembly comprised of a ferromagnetic body joined to a tubular non-magnetic stem. The ferromagnetic body and stem have a passageway therethrough and the stem passes through the central passageway of the electromagnet. The cable passes slidably through the stem and a stop collar is secured to the cable immediately forwardly of the stem for abutting coaction with the forward end of the stem.

Abstract: An actuator for converting electrical energy into rotary or reciprocating motion comprising a casing filled with an electro-sensitive fluid, the casing having a plurality of electrodes affixed along its inner periphery and including a rotary member which is impelled by the flow of the electro-sensitive fluid when DC voltage is applied to the electrodes.

Abstract: A method of recognizing armature impingement in an electromagnetic actuator having an electromagnet including a solenoid, an armature movable toward and away from the electromagnet and return means for exerting a force on the armature. The method includes the steps of maintaining a solenoid current at a predetermined magnitude I.sub.max during a predetermined period T.sub.A for capturing the armature at the electromagnet; switching off the solenoid current at a moment t.sub.1 upon lapse of the period T.sub.A ; upon lapse of a period T.sub.1 running from moment t.sub.1, oscillating the solenoid current between a lower holding current threshold I.sub.H1 and an upper holding current threshold I.sub.H2 ; detecting a current course from moment t.sub.1 ; and deriving a signal from such current course.

Abstract: A method for driving a magneto-resistive effect element in which a bias magnetic field is applied by a bias conductor fed with a bias current to a magneto-resistive effect element whose resistivity is changed with an impressed magnetic field, wherein the improvement comprises supplying to said bias conductor a pulsed initial current having a pulse crest value higher than the bias current value prior to supplying said bias current. The MR head can be operated with MR characteristics with stable output and with highly sensitive MR characteristics.

Abstract: A method of switching an electromagnetic actuator which includes an armature movable along a path of travel and two electromagnets having respective solenoids, disposed at opposite ends of the path of travel for alternatingly attracting the armature. The method includes the steps of alternatingly applying a supply voltage to the electromagnets for alternatingly causing a supply current to flow therethrough for effecting a reciprocating motion of the armature; and applying an induced current, generated by an induced voltage appearing across one of the solenoids upon removal of the supply current from the one solenoid, to the other of the solenoids until the supply voltage applied to the other solenoid is greater than the induced voltage and the supply voltage across the other solenoid is capable of maintaining an attained current flow therethrough.

Abstract: An electrical operated control module for a locking mechanism in which is located a locking mechanism and an electrically operated actuator member. The electrically operated actuator member has a magnetic force associated therewith and is actuated by a metal core in said coil. In one of the energized or de-energizes states of the coil the actuator member is attracted to said core and thereby urged to lock the locking mechanism and when the coil is in the other energized or de-energized state the actuator member is repelled by said core and thereby urged toward the locked position of the locking member. The actuator member is preferable a part of a toggle joint.

Abstract: A magnetic actuator design and method of use is provided that generally reduces problems associated with conventional actuators and can be specifically employed to increase the accuracy of actuator type precision operations, such as surface mounted electrical component placement, die and attach tooling movements, and tape and reel part storage tooling. The actuator includes a housing, a stem slidably disposed and having a rest position within the housing, a first magnetic portion attached to the stem and, a second magnetic portion attached to the housing, the second magnetic portion being of sufficient strength and oriented to exert a generally predetermined force on said first magnetic portion sufficient to resist displacement of said stem from said rest position.

Abstract: An assembly which can be used as a rotor in an electromagnetic actuator for a camera shutter. The assembly generally includes at least two pieces of magnetic material each having a north and south pole, a drive arm, means for magnetically holding the magnetic material in a fixed position relative to the drive arm and means for rotating the assembly within the electromagnetic actuator. In one embodiment of the invention, the magnetic material comprises a first magnet and a second magnet. Preferably, the first magnet and the second magnet are rectangularly shaped.

Abstract: Apparatus for operating needles of a textile machine includes magnetically operated control flaps for operating the needles, and magnetic controls operable to actuate the control flaps. The control flaps include a flap structure and an armature disposed on the flap structure, the magnetic controls being operable to magnetically actuate the armature to thereby effect movement of the flap structure, whereby the movement of the flap structure actuates the needles.

Abstract: To reduce noise, impact forces and bouncing, the shaft of a rotary solenoid is provided with a dampening mechanism which generally includes a resilient dampening element and a cooperating collar which are axially disposed about the rotating shaft of the solenoid. Following activation of the rotary solenoid, the resilient element is drawn into contact with the housing, developing friction between the rotating resilient element and the housing of the rotary solenoid which operates to bring rotation of the shaft to a controlled stop.

Abstract: An electromagnetically activated mechanism has mechanical input and output members, at least one of which cooperates with the armature of an electromagnet which is energisable to prevent or limit movement of that member. The electromagnet and its armature are located so that when the electromagnet is de-energized the armature can be urged by the aforesaid one member towards a position in which the magnetic gap between the armature and the electromagnet is a minimum.

Abstract: A high torque rotary solenoid is disclosed employing attracting and repelling forces of permanent magnets to induce rotary motion is disclosed. Four arrays of magnets are located on a stator and rotor and are arranged along the axis of rotation of a shaft. Two magnet arrays are located on the stator, and two magnet arrays are located on the rotor. Each of the magnet arrays on the stator is arranged to come in close proximity to one of the magnet arrays on the rotor when the rotary shaft is positioned to the clockwise or counterclockwise rotary motion limits. The rotary solenoid has two rotational positions, each position corresponding to the mechanical limits of rotational movement.

Abstract: A motor includes a pair of linear actuators having a rack connected to their actuation elements. The linear actuators are powered in a manner which causes them to oscillate. A pair of sector gears which mesh with the rack are rotatably mounted on individual shafts to rotate clockwise when the rack moves in one direction and counterclockwise when the rack moves in the opposite direction. One of the sector gears is coupled to its associated shaft through a counterclockwise one-way clutch and the other sector gear is coupled to its shaft through a clockwise one-way clutch. The shafts have intermeshing drive gears mounted on them and thereby rotate counter to one another. An output gear can be coupled to either drive gear through an idler gear which is engaged with the appropriate drive gear by a solenoid-operated carriage. When the rack is moving in a first direction one of the sector gears is coupled to its shaft through its one-way clutch to rotate the drive gears.

Abstract: A rotary latching solenoid of the type in which a permanent magnet causes a flux flow path to be formed between opposing pole faces of an armature and a base in order to hold the armature in an energized or latched position is improved by providing the pole faces of the armature and base with raised sector portions, each sector portion having a sector face. In the energized or latched position, the sector faces of the armature and base are adjacent to each other and lines of flux flow between them are in a circumferential direction. The holding power of such an armature and base construction is greater than that of previous solenoids in which the opposing pole faces lie in a plane perpendicular to the solenoid axis.

Abstract: An electromagnetic device for use in, for example, the diaphragm control of a camera. The electromagnetic device includes an electromagnet, an armature, an armature shaft and a restricting member for inclining the armature with respect to the armature shaft, whereby even if the armature shaft is not parallel with the attraction face of the electromagnet, holding the armature attraction by the electromagnet is certain.