Abstract: A diagnostic relay has a casing mounted on a relay base and enclosing components of the relay. The casing includes a top wall having a plurality of apertures. The apertures are aligned with contacts inside the casing. The contacts are integral with or electrically connected to relay prongs traversing the base. A diagnostician replaces a circuit relay with the diagnostic relay, then inserts probes of a circuit tester through selected apertures into engagement with the contacts to determine the location of faults in the circuit. In one embodiment, the casing is clear or transparent so the diagnostician may observe whether moving components of the diagnostic relay are operating properly.

Abstract: The invention relates to a twin relay with at least two drive mechanisms which are separate from each other. The drive mechanisms each act on designated contact springs and both act on a single contact assembly.

Abstract: This high-frequency relay comprises a body containing a contact unit having contact states switched according as an energization to a coil, and a base covering at least a bottom surface of the body. The contact unit is connected with at least one contact terminal. The contact terminal is protruded from the bottom surface of the body. The base has a grounding function and includes a conductive layer.

Abstract: In one aspect, a contact block for use with an electrical relay includes a grippable portion and a plurality of blocking portions extending from the grippable portion. The plurality of blocking portions are oriented in a parallel relationship relative to each other. The grippable portion and the plurality of blocking portions are substantially coplanar. In another aspect, a control system includes an electrical relay having a base, a contact arrangement supported on the base and a cover moveable between at least a first position, wherein the cover is releasably secured to the base over the contact arrangement, and a second position wherein the cover is disengaged from the base with the contact arrangement exposed to the user. The system further includes a contact block having a primary blocking portion and a secondary blocking portion.

Abstract: An electromagnetic relay comprises an electromagnetic relay main body in which a plurality of fixed contact terminals are attached to a plate portion made of an insulating material and a cover into which the electromagnetic relay main body is inserted. A plate portion made of an insulating material and having a plurality of fixed contact terminals attached thereto includes a first engagement portion at the position in which a plurality of fixed contact terminals are isolated from each other and the cover includes at its inner wall surface a second engagement portion that engages with the first engagement portion.

Abstract: In a relay (100), right and left sides of an edge on an upper end side of an L-shaped armature (201) are bent to form an engagement portion (201a) and the armature 201 is held to be rocked and displaced through an energizing spring piece (205c) of a hinge spring (205) in a state in which the engagement portion (201a) is engaged with an edge portion 204c of an end face 204a on an upper end side of a core (204). During magnetic adsorption, moreover, an upper end of the armature (201) has an outer peripheral surface thereof to abut on the end face (204a) at the upper end side of the core (201) in a close contact state.

Abstract: Electromagnetic relay including an insulating base housing, an operating electromagnet arranged on the base housing and a case covering the base housing and electromagnet. A movable contact and a fixed contact are attached to the base housing. The electromagnet includes a flat-plate-form yoke, a winding frame and an armature. The base housing includes a protrusion protruding upward in a vicinity of a first leg of the yoke. The winding frame includes an extension extending from a winding body on a side of the first leg, and which has an upper portion positioned at least above the first leg. The upper portion includes a recess which extends parallel to a direction of extension of the body of the yoke. The armature has a projection protruding upward on the upper end of the pivoting shaft. The projection is positioned inside a space defined by the recess of the winding frame and the protrusion of the base housing.

Abstract: Electromagnetic relay having an increased insulating distance between a primary side circuit consisting of an excitation coil and an armature and a secondary side circuit consisting of a movable contact and a fixed contact, so that the withstand voltage of the relay is increased in comparison to prior art electromagnetic relays. The electromagnetic relay includes a base housing having a first insulating wall extending between the excitation coil and the armature, and a second insulating wall separating the movable and fixed contacts and the armature. An operating part of the relay presses the movable contact via a hole formed in substantially the central portion of the second insulating wall of the base housing.

Abstract: The relay comprises a base body (27), a coil (1), a core arrangement (3), an armature (10) and a contact system. The contact spring (16) is configured as an arc and arranged to be connected with the armature (10) in such a way that it is subjected to uniform, low mechanical loading. As a result a material can be used for the contact spring (16) which presents high electrical conductivity, so that the forward resistance of the relay is reduced. The contact spring (16) and armature (10) are arranged in such a way that a relay with a compact structure can be obtained.

Abstract: An electromagnetic relay apparatus, which is improved in miniaturization, performance, assembly accuracy, cost reduction, productivity, and reliability. A plurality of electromagnetic relays, each having an NO contact that is closed by applying exciting current to a coil and an NC contact that is closed when the excitation current is not passed through the coil, are arranged in line, one diagonally opposite to the next, on a base so that the respective NO/NC contacts of adjacent electromagnetic relays are located in diagonally opposed positions in substantially point symmetrical relation. The electromagnetic relay includes an electromagnetic block having a couple of moving contacts, a first stationary contact and a second stationary contact both being connectable to external wiring, which are composed of uniform parts or components.

Abstract: The present invention provides an electromagnetic relay that has a long service life, even when being used for interrupting high voltage, and that can be miniaturized. In this electromagnetic relay, the circuit interruption is cut-off by two or more keying circuits, which are operated by a single coil and connected in series. Thus, an amount of generated arc per keying circuit is suppressed. Consequently, the service life of the electromagnetic relay is lengthened. Moreover, the space between the contracts thereof is reduced, so that the electromagnetic relay is miniaturized. Additionally, a magnetic field for extinguishing arc is formed by a back or counter electromotive force generated when the circuit is cut-off. Thus, the generated arc is extinguished.

Abstract: The present invention provides an electromagnetic relay that has a long service life, even when being used for interrupting high voltage, and that can be miniaturized. In this electromagnetic relay, the circuit interruption is cut-off by two or more keying circuits, which are operated by a single coil and connected in series. Thus, an amount of generated arc per keying circuit is suppressed. Consequently, the service life of the electromagnetic relay is lengthened. Moreover, the space between the contracts thereof is reduced, so that the electromagnetic relay is miniaturized. Additionally, a magnetic field for extinguishing arc is formed by a back or counter electromotive force generated when the circuit is cut-off. Thus, the generated arc is extinguished.

Abstract: The present invention provides an electromagnetic relay that has a long service life, even when being used for interrupting high voltage, and that can be miniaturized. In this electromagnetic relay, the circuit interruption is cut-off by two or more keying circuits, which are operated by a single coil and connected in series. Thus, an amount of generated arc per keying circuit is suppressed. Consequently, the service life of the electromagnetic relay is lengthened. Moreover, the space between the contracts thereof is reduced, so that the electromagnetic relay is miniaturized. Additionally, a magnetic field for extinguishing arc is formed by a back or counter electromotive force generated when the circuit is cut-off. Thus, the generated arc is extinguished.

Abstract: Casing 5 is formed with a recess 67 toward an internal space in which the internal components are not located. The recess 67 is formed with a gate portion 69 as a resin inlet for forming the casing 5, and a bleeder portion 68 which is opened during a sealing operation and then sealed.

Abstract: This invention provides an electromagnetic relay formed on a substrate (1), preferably a multi-layer printed circuit board. The magnetic circuit (4, 5, 6a, 6b, 7a, 7b) passes through holes (2, 3) in the substrate, and is formed using printed circuit manufacturing techniques, such as electroplating to manufacture the plated through holes.

Abstract: The present invention provides an electromagnetic relay that has a long service life, even when being used for interrupting high voltage, and that can be miniaturized. In this electromagnetic relay, the circuit interruption is cut-off by two or more keying circuits, which are operated by a single coil and connected in series. Thus, an amount of generated arc per keying circuit is suppressed. Consequently, the service life of the electromagnetic relay is lengthened. Moreover, the space between the contacts thereof is reduced, so that the electromagnetic relay is miniaturized. Additionally, a magnetic field for extinguishing arc is formed by a back or counter electromotive force generated when the circuit is cut-off. Thus, the generated arc is extinguished.

Abstract: Disclosed herein is a relay having a first circuit, a second circuit, a ground, an electromagnetic actuator assembly, and an armature assembly. The armature assembly is movable between first and second positions with respect to the first and second circuits, and is controlled by the electromagnetic actuator assembly. Movement of the armature assembly to its first position allows current to flow through the first circuit. Movement of the armature assembly to its second position couples the first circuit to the ground and allows current to flow through the second circuit. The ground may be embodied in an extension of the armature assembly that contacts the first circuit when the armature assembly moves to its second position, or the ground may be embodied in a biased conductor that is moved into contact with the first circuit when the armature assembly moves to its second position.

Abstract: According to various embodiments of the invention, a relay is suitably formed to exhibit an open state and a closed state. The relay is operated by providing a cantilever sensitive to magnetic fields such that the cantilever exhibits a first state corresponding to the open state of the relay and a second state corresponding to the closed state of the relay. A first magnetic field may be provided to induce a magnetic torque in the cantilever, and the cantilever may be switched between the first state and the second state with a second magnetic field that may be generated by, for example, a conductor formed on a substrate with the relay.

Abstract: An electromagnetic relay including a base including a receptacle, an electromagnet assembly incorporated in the base, and a contact section incorporated in the base to be actuated by the electromagnet assembly. The contact section includes a fixed contact member located away from the electromagnet assembly at at least a predetermined insulating distance, and a movable contact member located opposite to the fixed contact member at a position further away from the electromagnet assembly than the fixed contact member. The fixed contact member is provided with a fixed contact portion, a first terminal portion, a fitting portion arranged between the fixed contact portion and the first terminal portion, the fitting portion being fitted and inserted in a lateral direction into the receptacle of the base, and an extending portion arranged between the fitting portion and the first terminal portion, the extending portion extending to be exposed outside from the receptacle.

Abstract: An object of the present invention is to provide a relay in which an external lead-out terminal portion can be arranged in an optional position so as to constitute an in-line terminal while forming a base and performing a sealing operation easily. Horizontal portions are formed by bending terminal portions of coil terminals of an electromagnet block, and the horizontal portions are laid along the under face of a base to arrange the terminal portions and other terminal portions in a line.

Abstract: A multiple electromagnetic relay is disclosed which comprises at least three electromagnetic relays including electromagnetic relays of the same type or two electromagnetic relays of different types selected from electromagnetic relays of various types each including a coil and a contact unit of a different type and which is mounted in a single assembly frame adapted to be attached to a board. Those terminals of the electromagnetic relays for connection with the external conductors which are connectable with a common external conductor are coupled to each other by a coupling conductor in the area of the assembly frame, and the common external conductor is connected to one of the terminals thus coupled.

Abstract: This invention is intended to improve the electromagnetic coil technology currently used in tattoo machines. Existing coil technology generates electromagnetism that causes a round steel post to alternately repel and attract an armature bar, moving a needle bar and attached needle groupings into and out of the skin in the act of tattooing. The Square Electromagnetic Coil Bobbin Assembly uses a square steel post instead of a round post, increasing the surface area where the post contacts the armature bar and improving the magnetism and general movement of the bar. Increasing the amount of metal-to-metal contact results in significant improvements in the overall functioning of the tattoo machine and the operator's ability to achieve more solid color, smoother shading, and more consistent lines, all of which depend on the rate of movement of the armature bar.

Abstract: An electromagnet includes a plate-like yoke, shaped like L, with a curved surface portion, a rectangular iron core connected to said yoke and wound by a coil, an armature rotatably and pivotally supported by one end of said yoke, said armature being driven by said coil and coupling device for coupling said yoke with said iron core by spin press-fitting.

Abstract: An electromagnetic relay of a simple structure for reliably making and breaking a high load voltage is provided.

Abstract: A trigger coil has a primary winding, a secondary winding, a package incorporating therein both the primary winding and the secondary winding, and a common terminal to which one end of the primary winding and one end of the secondary winding are connected. One end of the primary winding is connected to an exit portion of said common terminal at a side to be connected to the circuit substrate, and one end of the secondary winding is connected to an exit portion of said common terminal at a side apart from the circuit substrate.

Abstract: A device for controlling an electric appliance having a door, a main power circuit, and a switch for automatically cutting off the main circuit when the door is opened. The switch is a reactivatable magnetic switch, which selectively assumes a closed position and an open position respectively closing and opening the main circuit. The magnetic switch is powered by an activating circuit, which is cut off when the door is opened and a movable part of a hinge supporting the door is rotated. When the activating circuit is cut off, the magnetic switch is moved into the open position by the action of a spring which keeps the magnetic switch in the open position even when the activating circuit is closed again. And turning the appliance back on calls for direct manual intervention by the user, who, after closing the door, must reactivate the magnetic switch by pressing a push-button, in opposition to the spring, to move the magnetic switch into the closed position.

Abstract: The electromagnet system has a yoke (1) and a round core 92) that has a cylindrical shaft and an outwardly expanded cone section (25) toward the fastening end. The core has its shaft plugged in advance into a round hole (13) of the yoke proceeding from the outside. The cone section (25) of the core also has a thread with which it is turned into the thread-free round hole (13) of the yoke (1) by being turned. In this way, the core can be exactly positioned and a good interference fit and a good magnetic coupling are achieved.

Abstract: Sealed relays intended for high-voltage or high-power switching are enclosed in a herrnetically sealed plastic housing or jacket (11) capable of long-term maintenance of either a high vacuum or a pressurized insulating gas within the relay to suppress contact arcing during switching. The impermeable plastic housing eliminates need for conventional glass or ceramic contact enclosures, and enables use of inexpensive relays (71) in demanding applications.

Abstract: An electromagnetic relay has an iron core, an armature, a coil wound around the iron core, a yoke, a hinge spring, and a joining structure. The yoke is fastened rigidly to the iron core and has an engaging hole and a fitting portion. The hinge spring is used to support the armature rotatably on the yoke, and the joining structure is used to join the hinge spring to the yoke in the electromagnetic relay. The hinge spring has a tongue and a dish-shaped portion, and the yoke has an engaging hole and a fitting portion for engaging with the tongue and the dish-shaped portion. The hinge spring is joined to the yoke by inserting and fitting the hinge spring into the yoke. This structure serves to simplify the process of assembling the hinge spring to the yoke and drastically reduce the number of assembling steps required.

Abstract: A relay is formed by a magnet system which includes a wound coil body, an L-shaped core arranged axially therein and an, L-shaped armature as well as an insulator base from which side terminal elements project and in which stationary and movable contact elements are arranged. The actuation of the movable contact elements is carried out by way of a slide coupled to the armature. The magnet system is fastened to the base with fastening continuations which are provided at the magnet system and that engage upward projections of the base thereby firmly joining the magnet system to the base. The L-shaped armature includes a free end seated at the free end of the longitudinal leg of the L-shaped core. The fastening of the armature is carried out by a U-shaped armature spring which includes one arm secured to the longitudinal leg of the L-shaped armature and a second arm plugged into the axial recess of the coil body which also houses the longitudinal leg of the L-shaped core.

Abstract: An operator assembly for an electromagnetic switching device includes a pair of insulative boards arranged in mutually facing relation. A first board carries first contacts, which may be arranged in pairs, while a second board carries second contacts designed to engage the first contacts upon closure. The first and second boards are pivotally secured to one another to rock between open and closed positions. A biasing member urges the board towards a normal position. The first board supports an electromagnet assembly and conductive traces for transmitting energizing current to the electromagnet coil. The second board supports an armature which is displaced under the influence of the electromagnet assembly during energization, thereby pivoting the boards with respect to one another against the force of the biasing member, and moving the first and second contacts into engagement.

Abstract: An electromagnetic relay having an armature-spring subassembly that matingly cooperates with a base body having stationary and moving contact elements and stationary terminal elements. The armature-spring subassembly includes a contact arrangement and an armature pivotably mounted to said contact arrangement. The contact arrangement includes two torsion spring ridges and a plurality of contact springs that are attached to both torsion spring ridges.

Abstract: An actuation device employing square-loop latchable magnetic material having a magnetization direction (polarization) capable of being changed in response to exposure to an external magnetic field is disclosed. The magnetic field is created by a conductor assembly with non-solenoid configuration. Once the magnetization direction of the material is so changed, the external magnetic field is no longer required to maintain the new magnetization direction. The latchable magnetic material is disposed on the mobile electrode of a switching device, and another magnetic material is disposed in spaced relation to the latchable magnetic material on a stationary electrode or surface. By applying an electrical current to a conductor assembly arranged proximate the latchable material, a magnetic field is created about the latchable magnetic material, to change the magnetization direction and thereby enable the attraction or repulsion of another magnetic material located on the stationary electrode.

Abstract: A latching relay having a manual reset function. The latching relay includes a coil for generating a magnetic force. An armature is provided which is dragged by the magnetic force to change into a first switching state of the armature. An elastic device which is moved following the movement of the armature caused by the magnetic force, is adapted to receive an external force to switch the armature back into a second switching state, wherein the armature can maintain one of the switching states without the magnetic force and the external force existing. A reset device is provided to receive the external force to move the elastic device, thereby switching the armature into the second switching state. A fixed support fixes in place the coil, armature and elastic device and provides a magnetic loop to strengthen the magnetic force.

Abstract: The relay has, one after the other on an elongate, narrow base body, a magnetic system and a contact arrangement having at least one fixed contact carrier and at least one movable contact spring. The contact carriers are in this case each embedded by a middle section into the plastic of a base body in such a way that their connecting lugs lie in a plane parallel to the longitudinal axis of the relay, while their contact-making end sections, which emerge on the upper side of the base body, lie in planes which are parallel to one another and perpendicular to the plane of the connecting lugs. This enables dimensionally accurate embedding of the contact carriers with good insulation with respect to the magnetic system and with easy processing from a sheet-metal plate.

Abstract: An electromagnetic relay has a magnet system, a base, a movable contact element, stationary contact elements and contact terminal elements. The base is formed by a printed circuit board arrangement. A first printed circuit board of the printed circuit board arrangement thereby faces toward the magnet system, and a second printed circuit board of the printed circuit board arrangement forms a bottom side of the relay. Each of the two printed circuit boards has interconnects. The movable contact element is actuated by an armature and is arranged between the two printed circuit boards. An actuation element that transmits the movement of the armature onto the movable contact element has a pin-shaped end section projecting through a recess in the first printed circuit board. The contact terminal elements are pin-shaped and project through congruent recesses in the two printed circuit boards.

Abstract: In a miniaturized relay for explosion endangered regions, the coil, core, and yoke are cast integrally into the carrier part. Restricted guidance contact units are disposed on the carrier part, on both sides of a partition. The armature is disposed on the side of the coil remote from contacts. A comb connects the armature on the one side of the coil body with the contact springs on the other side of the coil body. In the region in which the comb passes by the coil body, a guide for the comb is embodied on the carrier part. The partition has an extension which reaches into this guide region next to the coil. This extension and the rest of the partition are provided with a groove into which a rib on the cap encompassing the relay protrudes in order to elongate the air and leakage path between the contact units on the one side of the partition and the contact units on the other side of the partition.

Abstract: A micro relay comprising a coil plate 40 having a spiral flat coil 48 formed around a through hole 42 on the front and rear surfaces of the plate, a fixed contact plate 50 which is tightly fixed on the upper surface of this coil plate 40 and uses a tip portion of an iron core 51 projecting from the through hole 42 as a fixed contact 52 and a movable contact plate 20 which makes a movable contact piece 23 pivotally supported in the direction of plate thickness via a hinge portion 22 extending from inside an annular yoke 24 face the fixed contact 52 so as to allow it to come in and out of contact with the fixed contact 52. With this arrangement, a relay of a high productivity having no scattering in operation characteristics can be obtained.

Abstract: An electromagnetic relay and method of fabrication, in accordance with the present invention, include a base defining a bottom plane, a motor assembly mounted on the base, the motor assembly including a bobbin, a core with at least one winding about the core and an electrical component for electrically coupling to the at least one winding, the electrical component having leads configured to relieve stress in the at least one winding at coupling portions to the at least one winding. An armature is supported to be movable about a predetermined point for movement between two contact operating positions. At least one contact assembly for selectively providing one of an open and closed circuit is included. At least one terminal member is mounted on the base having a distal end for electrically connecting an end of the winding with a source of energy, and a proximal end is formed by at least one depending leg to define a slot for receiving at least one lead of the electrical component.

Abstract: The present invention is a latching magnetic relay capable of transferring currents of greater than 100 amps for use in regulating the transfer of electricity or in other applications requiring the switching of currents of greater than 100 amps. A relay motor assembly has an elongated coil bobbin with an axially extending cavity therein. An excitation coil is wound around the bobbin. A generally U shaped ferromagnetic frame has a core section disposed in and extending through the axially extending cavity in the elongated coil bobbin. Two contact sections extend generally perpendicularly to the core section and rises above the motor assembly. An actuator assembly is magnetically coupled to the relay motor assembly. The actuator assembly is comprised of an actuator frame operatively coupled to a first and a second generally U-shaped ferromagnetic pole pieces, and a permanent magnet. A contact bridge made of a sheet of conductive material copper is operatively coupled to the actuator assembly.

Abstract: An electromagnetic actuator has an iron core around which a coil is wound; two permanent magnets, the same poles of which are placed on the ends of the core which extend beyond the coil and which have the same direction of polarity; magnetic poles formed on either end of the iron core; a yoke which connects the poles of the magnets opposite those which face the core; and an iron armature which is supported by a fulcrum on the yoke in such a way that it is free to rotate around the fulcrum, and which has on either end a magnetic pole which faces one of the poles of the core.

Abstract: In connection with a relay with contact units on both sides of a partition and with plug connectors which can be plugged vertically in relation to the partition, a very compact construction is achieved by offsetting the contact units arranged on the top side of the partition with respect to the contact units arranged on the bottom side, and by passing the plug connectors through the partition and between the electrically conductive elements arranged on the bottom side. Thanks to offsetting the plug connectors with the connecting element on the centerline (M), a very large distance can be achieved between the plug connectors, which meets all minimal requirements for a safe separation of different potentials. Labyrinthine courses for air and leakage paths between the circuit units and with respect to the actuating member can be created it the interior in the relay by the partition, separating walls, covers and collars, which also meet these requirements.

Abstract: The invention relates to a switching device having a main electromagnetic drive for connecting and disconnecting a moving contact piece to fixed contact elements, and having an auxiliary electromagnetic drive which, in the event of an overload current flowing via the moving contact piece, in the ON state exerts an additional contact pressure of the contact piece on the fixed contact elements. A lever mounted in the moving contact carrier is also is provided to transmit the additional contact pressure.

Abstract: A micro-relay module includes a substrate and a lid in spaced apart relation, and a solder ring which bonds the lid to the substrate to define a chamber therebetween. A micromachined relay is integrally formed on the substrate or on the lid within the chamber. A gas is contained in the chamber at a gas pressure which is above atmospheric pressure. Input/output pads are included outside the chamber and electrically connected to the micromachined relay. Large numbers of encapsulated modules may be fabricated on a single substrate by integrally forming an array of relays on a face of a first substrate. A second substrate is placed adjacent the face with a corresponding array of solder rings therebetween, such that a respective solder ring surrounds a respective relay. The solder rings are reflowed in a gas atmosphere which is above atmospheric pressure to thereby form an array of high pressure gas encapsulating chambers.

Abstract: An improved trip mechanism for an overload relay includes a housing, a bistable armature mounted in the housing on a pivot for pivotal movement between two stable positions and fixed contacts within the housing. Moveable contacts are located within the housing and springs engage the moveable contacts and urge the same toward the fixed contacts to establish an electrical conducting relationship therebetween. Moveable, contact engaging posts are located on the armature and opposite of the springs for engaging the moveable contacts and moving them away from the fixed contacts against the bias of the springs for one of the two stable positions and for effectively disengaging the moveable contacts to allow the springs to move the moveable contacts into the electrical conducting relation. The relay further includes a latch surface carried by the housing and a spring mounted on the housing and having a latch finger for engaging the latch surface and retaining the armature in one of its two positions.

Abstract: A high frequency relay for switching a high frequency signal includes stationary contacts and terminals formed on a substrate in a planar configuration. An upper and a lower ground layer are respectively formed on the upper and lower surfaces of the substrate in the vicinity of the stationary contacts and terminals. A movable contact spring is so configured as to be connected to ground via the ground layers when it opens the contacts. With this configuration, the relay is capable of reducing the leakage of signals and thereby enhancing isolation characteristic.

Abstract: An electromagnetic relay includes a winding, a magnetic core disposed within the winding, and an armature mounted for movement at a first end of the winding. At least one movable circuit contact is operably associated with the armature and movable with respect to at least one stationary contact mounted in the relay responsive to motion of the armature. An end plate is mounted at an opposing end of the winding and an insulating sheet is folded about a portion of the winding. The insulating sheet has first and second sides, with the first side being secured on one end to the end plate, and the second end disposed between the armature and the first end of the winding. An outer frame covers at least a portion of the insulating sheet. The insulating sheet functions to reduce the occurrence of voltage breakdown within the relay.

Abstract: A push button residual current device employs a single push button to perform setting and testing operations. Over a first part of the down stroke of the push button a test trip is initiated which causes the device to trip if it is properly functioning. When the push button is pushed further, and then released, the device goes into a state allowing current to pass provided no trip condition is detected. Once the device is operative for allowing current to pass, any fault condition results in a trip for disconnecting the power supply.

Abstract: An electromagnetic drive for a switch, preferably a motor protective circuit-breaker. The electromagnetic drive has a magnetic system, whose movable armature serves to actuate switching contact elements in the switch. The armature is coupled to a transmission lever by a leaf spring. One end the leaf spring is fixedly clamped and the other end of the leaf spring is connected to the transmission lever in such a way that the transmission lever is actuated when the leaf spring flexes and thus the free end of the leaf spring is displaced.

Abstract: An electromagnetic contactor includes an iron core members formed of a first core bent in a U-shape, and a second L-shaped core contacting the first core. A coil is wound around a spool disposed on an upper arm of the first core and the second core to form a main leg while a lower arm of the first core constitutes a yoke. Thus, the iron core members can be processed by a press machine operating at a normal cutting speed, and welding and polishing operations can be eliminated to thereby reduce the number of processing steps required.