Abstract: The arrangement for mechanically coupling an overload relay (1) to a contactor (2, 15) is suitable for use with a contactor (2) having connection terminals (11) with wire cages (17) as well as with a contactor (15) having connection terminals (16) with pressure plate claws (12). In order to allow mechanical coupling for both types of connection terminals (11, 16), the coupling cutout in the base of the contactor (2, 15) contains a central cutout (7) and two slots (8, 9) on both sides of the central cutout (7), which are aligned in the pick-up direction of the connection terminals (11, 16). The central cutout (7) is provided to accept the entire end section of the hook (3), and both the slots (8, 9) accept only the flat end section (4) that lies behind the latch element (5) of the hook (3).

Abstract: A polarized electromagnetic relay has a base body, an armature, an envelope that comprises insulating material, a coil, a core and a bar-shaped magnet. The base plane is defined by a bottom side of the base body. The armature is arranged between two contact springs that lie parallel to each other in a common plane. Two transverse terminal webs, which have their sheet metal plane extending perpendicular to the base plane, extend out of the envelope in the area of the rotational axis of the armature. The terminal webs are respectively connected with fastening tabs that have a sheet metal plane extending perpendicular to the base plane. The contact springs exhibit two spring arms and a connecting web, respectively, which has its sheet metal plane extending perpendicular to the base plane. The spring arms exhibit a contact making part and a part that is embedded in the envelope, respectively. The part that is embedded in the envelope merges into the connecting web.

Abstract: In the preferred embodiment, a variable magnetic reluctor structure comprng an iron yoke having two opposing "U"-shaped bodies, magnetic flux sources formed by portions of the yoke, a magnetic flux path, a working space and a reluctor space is provided. A reluctor member comprising diamagnetic disks is inserted within the reluctor space decreasing the magnetic permeability of the magnetic flux path to a value lesser than that of air (1.0). The iron disks increase permeability, while either a Type I or a Type II superconducting disk or a combination of iron disks interspersed between Type II superconducting disks decreases permeability.

Abstract: A switching apparatus including an electromagnetic command device fitted with a magnetic circuit made up of a main circuit polarized by a permanent magnet and linked to a depolarizing coil and through a movable circuit integral with a movable support subject to a return spring and acting directly or indirectly on at least one disconnecting pole. The main magnetic circuit has at least two air gaps in series on the path of the magnetic flux generated by the permanent magnet and the movable magnetic circuit includes at least two parts capable of closing the air gaps when the main magnetic circuit and the movable magnetic circuit are joined together and are crossed by the magnetic flux created by the permanent magnetic, thereby carrying out a locking function and creating a multiplication of the locking forces, with an unlocking function being provided by the depolarization coil the counter-flux from which crosses the magnetic circuit and air gaps.

Abstract: A monophase electromagnetic actuator including at least a ferromagnetic part integral with a member movable along a direction Y, a fixed stator part made of soft magnetic material and including at least on electrical coil, and a thin transversely magnetized permanent magnet. The fixed stator part and the ferromagnetic part define between each other at least two air gaps arranged symmetrically with respect to the medial plane perpendicular to the axis of displacement of the movable member and passing through the middle of the permanent magnet. The length of the ferromagnetic part is approximately equal to the length of the permanent magnet.

Abstract: A reed switch package is disclosed that includes a reed switch with at least one electrical signal path. A cylindrical ground shield is provided about the reed switch. Ground terminals are connected to opposing sides of the ground shield so that the ground terminals are on opposing sides of the signal terminal and lie in the same plane. The reed switch resides on a support substrate. An electrically conductive signal via extends through said main body and connects to the signal terminal. Ground vias extend through the main body and respectively connect to the ground terminals. The grounds vias are on opposing sides of the signal via and lie in the same plane as the signal via. The signal and ground via exit at the bottom of the main body and are connected to a circuit via solder balls to provide a compact surface mount package with a controlled impedance environment.

Abstract: An electromagnetic relay having a manual actuator wherein at an edge of the relay's housing is an opening formed in the shape of a mounting slot in which a pivot lever is mounted with a hinge segment. In an idle state, an outer lever segment of the pivot lever is lowered in a cavity of a housing wall while an inner lever arm extends along a housing wall perpendicular thereto. When the pivot lever is actuated, the inner lever arm actuates a movable relay part, in particular a bolt, up to a first operating position. When the pivot lever is rotated further, the inner lever arm can be locked with the movable relay part.

Abstract: A magnetically actuated switch has a carrier sheet with electrodes on one side thereof and an actuator knob on the other side. Magnets carried by the knob drag an armature around on the electrodes. A retainer for the knob permits physical or logical relocation of the knob with respect to the carrier sheet.

Abstract: In a high field superconducting magnet device, e.g., for NMR, a conventional low temperature superconducting solenoid type magnet is combined with an inserted superconducting magnet, which is fabricated from high temperature superconducting materials having very high critical currents. Both magnets operate with stability at the same low temperature in persistent modes after operating conditions are achieved. The flux field and superconducting currents in the inserted superconducting magnet are generated by flux trapping when the field of the low temperature superconducting solenoid type magnet is reduced. The field of the hybrid magnet assembly is the resultant of the respective fields of the two magnets.

Abstract: A magnet for use in medical magnetic resonance studies and having a pair of ferromagnetic pole pieces supported by a ferromagnetic yoke which establishes a flux return path. columns of the yoke are configured to maintain the magnetic field within the columns approximately constant in every cross section of the columns and to maximize access to the magnet gap.

Abstract: A magnetic actuator (10) suitable for the operation of electric circuit breakers which uses a laminated yoke structure (12) to increase permanent magnet flux holding forces. The actuator comprises a magnetic yoke (12) which forms both low and high reluctance flux paths with at least one permanent magnet (30) and an armature (40) axially reciprocable in a first direction within the yoke (12). The actuator is configured to provide a first low reluctance flux path and a first high reluctance flux path when the armature (40) is in a first position and a second low reluctance flux path and a second high reluctance flux path when the armature (40) is in a second position. A pair of electromagnetic coils (60, 61) are used to drive the armature (40) between the first and second positions.

Abstract: A magnetic inductor for inducing a magnetic field and electromagnetic effects upon water passing through a conduit, the magnetic inductor having two semi-cylindrical halves, each half having a longitudinal channel such that when the two semi-cylindrical halves are juxtaposed, there is defined a throughbore for receipt of a water conduit, each semi-cylindrical half having a plurality of semi-annular permanent magnets positioned therein such that they form an annular ring permanent magnet when the two semi-cylindrical halves are juxtaposed about a water conduit.

Abstract: Magnetic flux trapping clamps are provided that trap or pin the magnetic flux of ring shaped superconductive magnets in a high permeability metallic core located in the bore of the ring. Preferably, the superconductive magnets comprise a single crystal cut into a ring shape. Multiples of the flux-pinned magnets, having high magnetic strength, can be arranged in a variety of arrays for a range of applications. The devices offer several advantages over permanent or electromagnets. The devices easily activated by charging with a cryogenic fluid, to induce the superconductive effect, and deactivated by draining the fluid.

Abstract: A switching device providing highly-reliable, frictionless, adjustment-free operation is described. Comprised of a comparatively small number of moving parts, the various aspects of the invention offer compact, cost-effective, reliable alternatives to their complex electromagnetic and costly solid-state counterparts. The main parts of the invention rely upon the principles of magnetic attraction and repulsion for the switching of a plurality of electrical contacts contained within the switching device. The flexibility inherent in the design of the invention permits the switching device to be configured in a variety of aspects, including the failsafe and latching designs described herein.

Abstract: A superconducting coil (12) having a plurality of superconducting layers (18) is provided. Each superconducting layer (18) may have at least one superconducting element (20) which produces an operational load. An outer support structure (24) may be disposed outwardly from the plurality of layers (18). A load transfer system (22) may be coupled between at least one of the superconducting elements (20) and the outer support structure (24). The load transfer system (22) may include a support matrix structure (30) operable to transfer the operational load from the superconducting element (20) directly to the outer support structure (24). A shear release layer (40) may be disposed, in part, between the superconducting element (20) and the support matrix structure (30) for relieving a shear stress between the superconducting element (20) and the support matrix structure (30).

Abstract: A passive shimming system for a superconducting magnet to improve bore magnetic homogeneity includes a plurality of axially extending non-magnetic drawers each including a plurality of pockets along the drawer with a securable cover for each pocket to enclose the selected ferromagnetic shim disks and compressible spring material to enable individual access and shimming of selected pockets.

Abstract: A tri-core solenoid includes first, second and third core segments. The first and second core segments mate to form a low reluctance mating interconnect. The low reluctance mating interconnect includes, in one example, overlapping regions of the first and second core segments that form a joint surface area substantially in the same plane as the flow of flux through the first and second core segments. The third core segment, such as a plunger or armature, is slideably received in an aperture defined by the first and second core segments. The first core segment includes an end portion preferably having a first pole face that mates with a second pole face on the third core segment. The second core segment has a receiving region, such as a journal or bushing, that slideably receives the third core segment and forms a journal air gap therebetween.

Abstract: A magnetic head for a magnetic pick-up tool includes a magnet having a pick-up surface and a sleeve member having an open end and being slidably positioned over the magnet, the sleeve member being made of a material acted upon by the magnet such that the magnet exerts a force upon the sleeve for maintaining the sleeve in a rest position wherein the open end extends beyond the pick-up surface, wherein the sleeve is slidable in a direction away from the pick-up surface and against the force to a withdrawn with respect to the magnet. A magnetic pick-up tool including a magnet head is also disclosed.

Abstract: A magnet sheet 3 with a thickness of 0.05 to 0.15 mm is formed by molding a material obtained by adding magnetic particles to a synthetic resin material into a sheet and multiple pole magnetizing one surface of the sheet to form alternate N and S poles on that surface. A printing sheet 2 with a thickness of 0.05 to 0.15 mm, constituted by a paper sheet such as a high quality paper sheet or a coated paper sheet or a synthetic paper sheet or a synthetic resin film, is bonded to the non-magnetized surface of the magnet sheet 3. A magnet display sheet 1 , which has a thickness of 0.1 mm to 0.3 mm, is thus obtained, and it is capable of being printing on with a usual home or office copier or printer.

Abstract: An apparatus for reciprocating an engine valve between open and closed positions in an internal-combustion engine includes an electromagnetic actuator having first and second mutually spaced electromagnets for generating electromagnetic forces; and an armature disposed between the first and second electromagnets and movable in response to the electromagnetic forces. The armature is operatively coupled to the engine valve to cause it to reciprocate between its open and closed positions. First and second gas springs are coupled to the armature for opposing the electromagnetic forces generated by the first and second electromagnets, respectively. A pressurized gas source supplies the first and second gas springs with pressure and a control arrangement varies the pressure in the first and second gas springs. A positioning spring is coupled to the engine valve for moving the engine valve into its closed position when the first and second gas springs are in a depressurized state.