Abstract: A modular thermal magnetic trip unit includes the bimetal, magnet, armature and latch in a one-piece assembly. A latch opening is formed in a bottom part of the magnet on a side opposite the bimetal for receiving and retaining the tip of the cradle. The motion of the inodular assembly is accelerated by the combined thermal and magnetic forces acting in unison.

Abstract: An actuator assembly for an electrical power switch apparatus, the actuator assembly having a housing and a plunger positioned within the housing where the plunger is movable between a set position and an actuated position. The plunger includes a compression spring to provide a pre-load thereto that biases the plunger away from the set position and toward the actuated position. A magnet contained in the housing and positioned proximate to the plunger establishes a magnetic force which overcomes the pre-load of the compression spring and maintains the plunger in a set position. A coil assembly, that when energized, produces an electromagnetic force which bucks the magnetic force established by the magnet allowing the plunger to be propelled by the compression spring to the actuated position. A screw extends through an opening in the plunger for engagement with the compression spring so that rotation of the screw results in the adjustment or calibration of the pre-load of the compression spring.

Abstract: An improved circuit interrupter having a solenoid in series with the line and load terminals with an armature operable to activate a trip mechanism within the circuit breaker upon experiencing current levels indicative of short circuit conditions. The traditional solenoid coil is replaced with a free form conductor stamped in a serpentine pattern with adjacent legs deformed slightly in opposite directions to permit an electromagnetic material to be disposed therebetween. Current is directed through the conductor progressively back and forth through the serpentine pattern and creates a magnetic field in the electromagnetic material which is sufficient to activate an armature when current levels approximate short circuit conditions.

Abstract: A dipole permanent magnet structure having a rectangular gap about a longitudinal axis, in which tapered pole pieces form opposing sides of the rectangular gap to permit establishing a magnetic field in the gap. Permanent magnets having a rectangular shape are coupled to the rear, or base, of each pole piece, and have a magnetic field oriented in the same direction as the pole pieces, perpendicular to longitudinal axis, thereby establishing a magnetic field between the pole pieces. Additional permanent magnets, including a pair of blocking magnets, are coupled to the aforementioned permanent magnets to form a magnetic circuit. The orientation of the magnetic field of each permanent magnet is generally aligned in the direction of the lines of flux in the magnetic circuit to maximize the flux density within the air gap created by formation of the permanent magnets. Moreover, the pair of blocking magnets each form an opposing side of the rectangular gap adjacent to the pole pieces to prevent fringing.

Abstract: A device for displaying the loose coupling between magnetic fields is provided, comprising a first disk having a plurality of magnetic elements attached to the first disk so that the magnetic field of the magnets extend radially from an outer edge of the first disk, a second disk having a plurality of magnetic elements attached to the second disk so that the magnetic field of the magnets extend radially from an outer edge of the second disk so that the magnets on the disks are loosely coupled to each other, the strength of the loose coupling depending on the orientation of the magnets with respect to each other, and a rotatable control member having a magnetic element attached to an end of the control member, the control member magnet being rotated to a first position such that a predetermined pole of the control member magnet is located adjacent to the magnets on the first disk causing a magnetic coupling of the magnet on the control member to the magnets on the first disk so that loose coupling and the chao

Abstract: An open superconductive magnet useful in magnetic resonance imaging (MRI) applications. The magnet has two spaced-apart assemblies and preferably has a "C" shape. Each assembly has: a vacuum enclosure having a longitudinal axis and surrounding a bore; a magnetizable pole piece located within the bore and outside the vacuum enclosure; and a superconductive main coil, a superconductive shielding coil, and a magnetizable ring positioned within the vacuum enclosure. There is no magnetizable solid path between the two pole pieces. Preferably, the ring is positioned longitudinally between the main and shielding coils.

Abstract: A reed switch employs contact blades which have enhanced flexibility and performance, as a result of the selective removal of material from one or more of the blades without work hardening the remaining blade material. The blades are masked and acid etched in predetermined patterns to provide either a contact region, a hinge or fulcrum region, or one or more of both. The contact region of the blade optimizes the alignment and magnetic coupling of the switch while minimizing the electrical capacitance in the space between the blades when the switch is open. The hinge or fulcrum region improves blade compliance and flexibility under an applied load. Various geometries of the contact region can be employed to improve the performance and longevity of the switch.

Abstract: An electromagnetic switching device for operationally switching currents in the load range and having an instantaneous release, connected in series, for protection against welding of the contacts (6) in the overload range is created, and has a high reliability and low overall volume. The electromagnet (2) of the switching device (1) is arranged in the middle relative to the contact bridge carrier (8) and coupled directly to the latter in the middle. The instantaneous release (3) acts via a rocker (15) on the movable contact (6) and is actuated only in the case of overcurrents, use being made of the fact that only the directly coupled drive system of the switching device is employed in the nominal current range.

Abstract: The relay includes a coil assembly enclosed in a top enclosure made from insulating material. The coil assembly includes a spooled coil body, a core, pole shoes and winding terminal elements assembly and is disposed above a pivoting armature which is connected to contact springs via a carrier element of insulating material. The relay also includes a base made from insulating material and which contains terminal paths for stationary cooperating contact elements as well as contact terminal elements. The armature is disposed above the base via bearing supports and bearing bands integrated in the contact springs. A frame is disposed over the base and forms a housing for the relay together with the base and with the top enclosure. The housing encapsulates the contact space of the relay, wherein the frame with the base represents the lower housing part and the top enclosure for the coil assembly represents the upper housing part.

Abstract: An electromagnetic relay comprising a smaller number of components and would be shorter than its predecessors. A movable block and a contact mechanism in a conventional relay are arrayed in a linear fashion, which tends to increase the length of the relay. This relay, however, has a movable block placed on a electromagnetic block, and a drive rod extending from the movable block drives a contact mechanism which is installed on one side of the electromagnetic block to short the length of the relay.

Abstract: A high self resonant frequency inductor and method for making the same is described. The inductor comprises a plurality of horizontal conductor coils vertically spaced apart, including a top conductor coil and a bottom conductor coil, the top and bottom conductor coils each having a conductive termination. Dielectric material extends between and separates the conductive coils and the top and bottom terminations. The dielectric material has a plurality of via holes therein to provide communication between adjacent pairs of the conductive coils, the top conductive coil and top termination, and the bottom conductive coil and bottom termination. A plurality of conductive via connections extend through the via holes to connect the plurality of conductor coils, the top termination, and the bottom termination in series with one another.

Abstract: A magnetic switch assembly (100) for electrically coupling with an electrical circuit of an alarm system (16) and for detecting relative movement between a first, stationary member (102) and a second, moveable member (104) is disclosed. The switch assembly includes a switch means (106) adapted for mounting within the first stationary member and a corresponding electromagnet assembly (108) having an electromagnet (120). The switch means includes a housing (110), a pair of spaced switch elements (112,114) supported in the housing that are electrically coupled with an alarm device or system, a ferromagnetic body (116) such as a ball positioned within the housing and moveable between the switch elements, and a ferromagnetic core (118) positioned above or adjacent one of the switch elements for biasing the body to either its closed or opened position. The electromagnet (120) is coupled with a suitable source of electricity and is switchable between on and off states.

Abstract: A complex magnetic field generating device, comprising a frame, a plurality of magnets capable of producing a magnetic field, wherein each of the plurality of magnets has a north pole and a south pole and a longitudinal axis passing therethrough, the plurality of magnets are positioned in a side by side axis parallel orientation and are partially held in place by the frame, a coil of electrically conducting material wrapped about the plurality of magnets and orthogonal to the longitudinal axis of each of the plurality of magnets, and a source of electrical energy for supplying an electrical current to the coil enabling a magnetic field detectable with iron filings to be produced therefrom. A switch is provided to enable the electrical current to flow in a first direction and a second direction opposite to the first direction.

Abstract: A manufacturing method for an electromagnetic relay whereby a base block 20 is monolithically molded to terminals 21-24 and connector tabs 62 provided in a lead frame 60. After separating the terminals 21-24 from the lead frame 60 and bending the terminals, a permanent magnet 30 and armature block 40 are assembled into the base block 20. A case 50 is then pressed down over the base block 20 to separate the base block 20 from the connector tabs 62 of the lead frame 60. Electrical inspection and aging treatment can thus be accomplished with the base block 20 connected to the lead frame 60, improving assembly precision and productivity.

Abstract: A flexible coil winding structure of a flyback transformer is disclosed, which comprises a magnetizable core at the center portion, a pair of flexible insulator sheets at both sides of the magnetizable core for insulating it, and first and second conductor line patterns arranged so that they can provide a coiled circuit pattern around the pair of flexible insulator sheets. The first and second conductor line patterns include respectively a plurality of first and second parallel conductor lines which are inclined at a predetermined angle. Also, the coil winding structure includes an opening, such as an etched hole or a window, etc., at a portion of the insulator sheet which corresponds to the upper and lower portions of all the conductor lines and an electrical connection for connecting through the opening the upper portions and the lower portions of the first and second conductor line patterns so that the conductor lines provide the coiled circuit pattern. The electrical connection is provided by soldering.

Abstract: A flexible coil winding structure of a flyback transformer is disclosed, which comprises a magnetizable core at the center portion, a first conductor line pattern and a second conductor line pattern at both sides, and a pair of flexible insulator sheets at both sides for substantially insulating the overall coil winding structure and protecting it from its surroundings while in service. The first and second conductor line patterns are arranged so as to provide the coiled circuit pattern. A pair of insulating strips are provided between the magnetizable core and the first and second conductor line patterns. Also, the coil winding structure includes an electrical connection for connecting the upper portions and the lower portions of the first and second conductor line patterns so that they provide the coiled circuit pattern. The electrical connection may be provided by soldering or welding, etc. A manufacturing process of the flexible coil winding structure is also disclosed.

Abstract: An electric component capable of connecting terminal fitments and electrodes arranged on a front surface of a circuit board to each other in a soldering-less manner without increased accuracy in assembling thereof and without using any conductive rubber member. A terminal assembly is constituted by a terminal fitment and a coiled spring. The terminal fitment includes first and second conductor holding sections each arranged for interposedly holding an end of each of connection conductors. The coiled spring is formed of a conductive wire and arranged so as to spirally surround the connection conductor and be compressed between a contact electrode and the first conductor holding section.

Abstract: A proximity switch system includes a switch portion, configured to connect and disconnect at least one electrical path, and a magnetically active actuator. The switch portion has a casing formed of a magnetically noninteracting material, at least one electrical contact disposed in the casing, a magnetically active armature member moveable along the casing between a first position and a second position, wherein the armature member contacts the electrical contact when in the first position to connect the at least one electrical path and the armature member being electrically isolated from the electric contact when in the second position to disconnect the at least one electrical path, and a magnetically active biasing member disposed in the casing, wherein the biasing member magnetically interacts with the armature member to bias the armature member in one of the first and second positions. The magnetically active actuator is movable with respect to the switch portion between proximal and distal positions.

Abstract: An electric arc extinguishing mechanism for an electric current switching apparatus employs a plurality of splitter plates in a conventional arc chute arrangement. Each splitter plate has a pair of permanent magnet structures that produce a magnetic field which interacts with the arc causing the arc to move continuously about the surface of the splitter plate until the arc is extinguished. Such movement prevents the arc energy from being concentrated in one spot which could melt the splitter plate.

Abstract: A circuit breaker with a completely electromagnetic type overcurrent tripping device has a flexibility for changes in the production schedule of the overcurrent tripping device. An overcurrent tripping device for each pole is integrally housed in a common unit case, which is then inserted into a case of the circuit breaker. In this case, a yoke of the overcurrent tripping device is combined with an oil dash pot inserted into a coil, and the combined parts are pressed and fixed in the unit case without soldering. Thus, the coil, which is changed depending on the rated current, and the yoke and oil dash pot which are common products, can be separately stored prior to assembly, thereby enabling flexible responses to changes in the production schedule. In addition, the yoke and the oil dash pot need not be soldered and are fixed individually to the unit case, thereby reducing the number of assembly operations.