Abstract: A magnet for MRI systems having a first pair of spaced apart oppositely disposed walls with a first pole piece extending from one wall of said first pair of walls towards a second pole piece extending from the other wall of the pair of walls with an air gap between the first and the second pole pieces. A superconducting coil mounted on at least one of the first and the second pole pieces to generate a magnetic field between the pole pieces with the air gap between the pole pieces large enough for receiving a patient therein fop magnetic resonance imaging purposes; and a second pair of oppositely disposed walls closing said magnetic circuit; there being sufficient room between the walls to enable medical personnel to be between the walls of the second pair of walls and the pole pieces providing substantially complete access to the patient in the air gap.

Abstract: A superconductive magnet with magnetic shielding has an annularly-cylindrical-shaped housing whose first end wall and outer cylindrical wall are magnetizable (e.g., iron) walls and whose inner cylindrical wall is a non-magnetizable wall. At least one main superconductive coil is positioned within the housing and carries an electric current in a first (e.g., clockwise) direction. An annular first permanent magnet is positioned outside the housing longitudinally proximate the first end wall. The first permanent magnet has a number of equivalent ampere turns and has a magnetic field direction oriented parallel to the axis pointing towards the second end wall so that its magnetic field longitudinally pulls the stray magnetic field of the superconductive coil(s), which leaves the magnet's bore, inward to be captured by the iron first end wall.

Abstract: A superconductive magnet with magnetic shielding has an annularly-cylindrical-shaped housing whose first end wall and outer cylindrical wall are magnetizable (e.g., iron) walls and whose inner cylindrical wall is a non-magnetizable wall. At least one main superconductive coil is positioned within the housing and carries an electric current in a first (e.g., clockwise) direction. A first resistive (e.g., copper) deflection coil is positioned outside the housing radially proximate the outer cylindrical wall and longitudinally closer to the first end wall than to a midpoint located between the two end walls. The first deflection coil carries an electric current in an opposite direction to the first direction so that its magnetic field longitudinally pushes the stray magnetic field of the superconductive coil(s), which leaves the magnet's bore, inward to be captured by the iron first end wall.

Abstract: A magnetic feedthrough manipulator adapted to be sealed to a chamber for inserting a manipulator shaft capable of rotational and longitudinal movement. The shaft is axially coupled to a ferromagnetic armature having an even number of longitudinal surface splines freely movable within a nonmagnetic tubular housing and which is controlled by alternately polarized magnets in a frame that slides and rotates on the outer surface of the housing. Two or more manipulator shafts may be controlled independently by a like number of armatures in the same housing.

Abstract: A superconductive switch has a first layer of a superconductive coil wire wound around a shaft clockwise from the first end to the middle and counterclockwise from the middle to the second end. A second layer of the wire is wound around the first layer in identical fashion. A third layer of the wire is wound around the second layer counterclockwise from the first end to the middle and clockwise from the middle to the second end. An electrical heater is located between the first and second layers, and a stratum of electrical insulation, discrete from that of the coil wire, is located between the second and third layers.

Abstract: A permanent magnet arrangement for magnetron plasma processing is disclosed. The arrangement includes a plurality of permanent magnets each of which has a fan-shaped or equilateral cross section parallel to the major surfaces thereof. The permanent magnets are assembled to form the permanent magnet arrangement which takes a disk-like configuration or a polygon. Each of the plural permanent magnets is made of rare-earth material and radially or essentially radially magnetized.

Abstract: A high temperature superconducting coil includes an oxide superconducting wire 2 wound in a coil, a container 3 for accommodating the superconducting wire 2, and a filling resin portion 4 for fixing the superconducting wire 2 in the container 3 by being injected into the container 3 and then cured.

Abstract: The electromagnetic clutch 1 includes a driven shaft 3, an armature assembly 4, a rotor and a coil assembly. The armature assembly 4 is mounted on the driven shaft 3. The rotor 7 is driven by a belt that engages the poly V-groove 7d. The coil assembly is supported in a groove 7a in the rotor. When the coil assembly is energized the armature 17 of the armature assembly 4 is pulled axially into contact with the rotor 7 and torque is transmitted from the rotor to the driven shaft 3. The coil assembly includes a magnetizing coil 21 enclosed in a bobbin 19 and a cover 20 and secured in a yoke 18. The bobbin 19 includes a terminal holder 19j. A terminal holder 19j receives a terminal assembly 23 and is held in position by a terminal housing 28. The terminal assembly 23 includes two terminals 24 connected by a diode 25. The diode 25 and a portion of each terminal is embedded in an enclosing member 27.

Abstract: A magnetically balanced spinning apparatus having an upright rotating shaft assembly that is balanced by circumscribing magnets is disclosed. The rotating shaft assembly is constructed from a single shaft with at least two magnets mounted thereon in a spaced apart relationship. The rotating shaft assembly is balanced on a pivot point at the bottom and spins on a weight bearing surface. A frame having side support magnets generally circumscribes the rotating shaft assembly wherein the support magnets and the rotating magnets of the rotating shaft assembly react to repel each other thereby balancing the rotating shaft assembly in a vertical orientation, and simultaneously levitating the rotating shaft assembly to minimize the effects of gravity thereon.

Abstract: An electromagnetic solenoid includes a body unit of plastic integrally including a cylindrical bobbin around which a coil is wound and a connector housing, a plunger arranged in the bobbin, a yoke fixed on the body unit, by insertion molding, to lead magnetic fluxes from the coil onto the side of the plunger, a terminal piece insertion-molded to the body unit in a protruding manner into the connector housing, a coil connection piece of the terminal piece for connecting the terminal of the coil protruding from the side portion of the body unit and a case attached to the body unit to cover the coil and bobbin with an insulation space for insulation defined around the coil connection piece.

Abstract: A magnetic energy reinforcing device including a base having an axial through hole and a plurality of chambers symmetrically spaced around said through hole, a plurality of magnets respectively mounted in each chamber on the base, and a plurality of antimagnetic plates mounted on the base and respectively disposed adjacent to the magnets at an outer side to concentrate the magnetic energy of the magnets into the axial through hole.

Abstract: An alternating current generator for vehicle has a permanent magnet in the rotary field core unit. Providing such magnet is effective to reduce leakage magnetic flux and the size of the machine. In order to magnetize the magnet without trouble caused by machined chips or iron powder, the magnet is magnetized after the rotary field core has been machined. While the magnet is magnetized in a short period by a pulse current, the field coil is short-circuited. The field coil is subjected to magnetizing flux passing therethrough and generates short-circuit current and, consequently, counter magnetomotive force, which prevents leakage of the magnetizing flux.

Abstract: A bistable electromagnet is moved from one operating position into the other by a short direct-current pulse, the next pulse following in each case having the opposite current direction. The essential factor in this is a permanent magnet which is arranged in the core area and which holds the armature against the action of an armature spring in one operating position. An electromagnet constructed in this manner can be produced without tolerance calibration and requires less control power when the permanent magnet is carried freely movably between two end positions in the direction of armature movement in a hollow space of the coil core. The coil core can be constructed as a pot, at the bottom of which the permanent magnet is magnetically held whilst the permanent magnet is held in the other end position by a stop in such a manner that its side facing the armature is approximately flush with the edge of the pot.

Abstract: A hybrid permanent magnet structure for providing a uniform magnetic field within a region of interest while allowing access via open ends by a patient for NMR scanning and by a surgeon to the patient via a large opening at the top. The magnet structure comprises nested inner and outer magnetic structures separated by ferromagnetic material and surrounded by a ferromagnetic yoke. The inner magnetic sections comprise end blocks of triangular cross-section, and the outer magnetic sections comprise end blocks of trapezoidal cross-section. Field distortion compensating means is provided by a primary filter structure to the ferromagnetic material and by magnetic insertions or a secondary filter structure.

Abstract: A structure for reducing impact force due to the collision of a movable iron core (4) against a fixed iron core (3), especially, impact force exerted against a bottom plate of a lower casing (2) where electromagnetic contactor mounting portions are provided. A back portion of the fixed iron core (3) is put on the bottom plate of the lower casing (2) through a convex leaf spring (14) which has opposite end portions bent at right angles to form lower pressure-receiving surfaces (14a) and side pressure-receiving surfaces (14b) so that the lower pressure-receiving surfaces (14a) and the side pressure-receiving surfaces (14b) are brought into contact with the bottom plate of the lower casing (2) and with side walls of the lower casing (2), respectively.

Abstract: A magic sphere that provides a uniform internal field within an enlarged king space that can be accessed from large chambers that penetrate deep into the cavity of the magic sphere without substantially disrupting the magnitude or uniformity of the internal field.

Abstract: A permanent magnet member composed of an integral sintered body made of a ferrite magnet material, the integral sintered body including a cylindrical center portion and shaft portions formed at the opposite ends of the cylindrical center portion and each having a smaller diameter than that of the cylindrical center portion, the cylindrical center portion being provided with a plurality of magnetic poles extending axially and arranged circumferentially on an outer surface of the cylindrical center portion.

Abstract: A magnet assembly comprises a pair of substantially aligned, spaced apart first magnets (1,2) having like poles facing each other. A second magnet (3) is positioned adjacent the space between the first magnets with its magnetic axis transverse to the alignment axis of the first magnets (1,2). A magnetic field of sufficient homogeneity to perform a nuclear magnetic resonance process is generated in a working region.

Abstract: A solenoid actuator, adapted for use in a fuel injector, has a pole member, an armature associated therewith, and an energizable winding associated with the pole member. The solenoid actuator is latchable by residual magnetism between the pole member and the armature without the aid of a permanent magnet. The pole member and the armature are composed of steel having a carbon content of between 0.8% and 1.2% and an RC hardness of between 40 and 60. The armature is reciprocable between a first position in which the armature makes physical contact with the pole member and a second position in which the armature is spaced from the pole member. The armature occupies the first position when the winding is energized and the second position when the winding is deenergized. The armature is held in the first position by residual magnetism between the pole member and the armature when the winding is deenergized after being initially energized.

Abstract: Within a magnetic structure, passages are incorporated equatorially about a pherical magnet for entering and exiting a cavity therein. To enhance the density of the field in the cavity, magnetic material other than that of the spherical magnet is incorporated within the magnet structure. A source of synchrotron radiation is derived by combining the magnet structure with means for introducing charge particles through the passages to the cavity wherein the magnetic field influences the particles to travel in a circular path.