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 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 of the present invention comprises a coil plate 30 having at least one layer of spiral flat coil 36a-36d formed around each of a pair of holes 32, 33 and fixed contacts 23a, 24a and movable contacts which are opposed to each other contactably and separably via the holes 32, 33 in the coil plate 30. The fixed contacts 23a, 24a are provided on one side of each of a pair of flat core blocks 21, 22 juxtaposed and insulated from one another. The movable contacts are provided on one movable contactor 43 which is supported so as to be drivable along a direction of plate thickness via at least one hinge portion 42 extending from a support member 44 for a movable contact plate 40.

Abstract: Magnetic apparatus for MRI/MRT probes and methods for construction thereof are disclosed. One embodiment includes a pair of opposed magnet assemblies defining an open region therebetween, a transmitting RF coil having at least a portion thereof disposed within the open region, at least one receiving RF coil disposed within the open region and X,Y and Z gradient coils. At least one of the X,Y and Z gradient coils is disposed outside of the open region. Another embodiment of the apparatus includes a single magnet assembly having a first surface and a second surface opposing the first surface, a transmitting RF coil having at least a portion thereof opposing the first surface, at least one receiving RF coil and X,Y and Z gradient coils. At least one of the X,Y and Z gradient coils opposes the second surface. In another embodiment the magnet assembly generates a permanent z-gradient magnetic field and therefore includes only X and Y gradient coils, at least one of which opposes the second surface.

Abstract: Permanent magnet assemblies are disclosed for use in medical applications, particularly permanent magnet assemblies for use in Magnetic Resonance Imaging (MRI) and/or Magnetic Resonance Therapy (MRT) to produce a volume of substantially uniform magnetic field in a restricted part of the patient's body in a region either adjacent to the surface of one permanent magnet assembly or between a set of a first and second permanent magnet assemblies, leaving open access to the patient's body. The assemblies consist of a plurality of annular concentric magnets spaced-apart along their axis of symmetry. A method for constructing such annular permanent magnetic assemblies is disclosed, using equi-angular segments permanently magnetized.

Abstract: Permanent magnet assemblies and hybrid magnetic apparatus are disclosed for use in medical applications, particularly permanent magnet assemblies for use in Magnetic Resonance Imaging (MRI) and/or Magnetic Resonance Therapy (MRT) to produce a volume of substantially uniform magnetic field in a restricted part of the patient's body in a region either adjacent to the surface of one permanent magnet assembly or between a set of a first and second permanent magnet assemblies, leaving open access to the patient's body. The assemblies consist of a plurality of annular concentric magnets spaced-apart along their axis of symmetry. A method for constructing such annular permanent magnetic assemblies is disclosed, using equi-angular segments permanently magnetized.

Abstract: A magnetically activated disc has a flat bipolar ring magnet mounted concentrically on the upper surface of the disc. The bottom surface of the disc has a protruding center point which provides an axis around which the disc can spin. The disc has a sidewall on the upper surface extending upwardly around the circumference of the disc to form an open cavity for holding a removable disc having a design imprinted on its upper surface. An external permanent magnet is manipulated so that its magnetic field acts upon the bipolar ring magnet, thereby causing the disc to spin around the protruding center point so that the disc with the imprinted design produces a desired visual effect.

Abstract: An open yoked magnetic apparatus for producing a substantially homogenous magnetic field. The apparatus includes an open ferromagnetic yoke, and two complementary permanent magnetic assemblies attached to opposing sides of the yoke. Each magnet assembly includes a ferromagnetic pole-piece and a first magnetic structure disposed between the pole-piece and the yoke, at least one annular ferromagnetic collimator concentric with said pole-piece and radially separated therefrom by a gap, and at least a second magnetic structure radially separated from the first magnetic structure by a gap and disposed between the at least one collimator and the yoke. The magnetic structures may be solid structures made from magnetic material or may be segmented or may include a plurality of magnetic blocks. A method for designing such an open yoked magnetic apparatus with improved properties is also disclosed.

Abstract: The relay has a T-shaped core and a U-shaped armature, the transverse web of the latter being mounted on the free end section of the core longitudinal limb, and the free ends of its longitudinal arms forming two parallel operating air gaps with respect to the transverse limbs of the core. In this way, particularly simple assembly and an operating air gap with large pole areas can be achieved using a small number of simple parts.

Abstract: Asymmetric, compact superconducting magnets for magnetic resonance imaging are provided. The magnets have a homogeneous region (the "dsv") which can be located close to one end of the magnet so as to reduce the sensation of claustrophobia experienced by patients undergoing MRI procedures. The magnets can be designed using a hybrid process in which current density analysis is performed to obtain an initial coil configuration which is then refined using non-linear optimization techniques to obtain a final coil configuration. The hybrid method can incorporate various constraints, including, the location and size of the dsv, the uniformity and strength of the B.sub.0 field, stray field strengths outside of the superconducting magnet, and field strengths within the magnet's coils. The hybrid technique can also be used to design compact symmetric superconducting magnets.

Abstract: An armature retainer for a magnetic switch retains an armature adjacent an internal surface of a carrier sheet with electrodes thereon forming switch contacts. The retainer includes a polishing pad, a backing layer and openings for the armature to reside therein. Both the armature and the retainer are adhered to the carrier surface by a magnet attraction. One or more magnets are carried in a rotor mounted on the external side of the carrier surface for rotary, linear or complex motion. When a user manipulates a knob attached to the rotor, the magnets rotate the armature and the armature retainer. The polishing pad cleans particles from the carrier surface as the retainer rotates. A shaft receiving opening may be used to tend to keep the armature retainer centered. Grooves embedded in the polishing pad surface are used to collect larger deposits.

Abstract: Structure for joining together metal-coated multi-core oxide superconductor wire material parts in a tape shape. The C axis of a oxide superconductor crystal is substantially oriented along the longitudinal (length) direction that the wire material extends. The end faces of the wire material parts contact each other at the joint part; and the C face of the oxide superconductor crystal is continuously oriented at the joint part.

Abstract: A relay has a leaf spring that is secured to a planar seating section of a yoke leg and/or to the planar seating section of the armature and has an unsecured spring section extending beyond the free end of the yoke leg or, respectively, the armature. In order to avoid a plastic deformation of the leaf spring given impacts, the planar seating section respectively merges into a convexly curved roll-off section of which the leaf spring rolls off given a blow without being bent permanently. The end of the roll-off motion is expediently limited by a detent and, in this way, it is assured that the relay does not suffer any permanent modifications of its characteristics, even given heavy blows.

Abstract: The invention relates to a solenoid valve with a coil body, a magnet core, an armature with armature guide and a yoke. In a first variant there is provided between the yoke and the armature guide a pole tube which has first means for producing an electrical contact with the armature guide and second means for producing an electrical contact with the yoke. In a second variant the solenoid valve also has a fixing plate which is disposed on the side of the solenoid valve on which the armature guide projects out of the yoke, the armature guide projecting through the fixing plate. According to the invention, in this variant a contacting element which produces an electrical contact between the fixing plate and the armature guide is provided between the fixing plate and the armature guide.

Abstract: There is provided an electro-magnetic relay including (a) a coil assembly including a core, a coil wound around the core, and a magnet located at the center of the coil assembly, (b) an armature block assembly including an armature swingable relative to the core, a spring swingable together with the armature and having a contact at a distal end thereof, and an insulating block formed integral with the armature and the spring, (c) a base assembly including a fixed contact facing to the spring, a fixed contact terminal on which the fixed contact is formed, a neutral terminal to be electrically connected to the spring, a coil terminal to be electrically connected to the coil, and an insulating block formed integral with the fixed contact, the fixed contact terminal, the neutral terminal, and the coil terminal, and (d) a cover housing therein the coil assembly, the armature block assembly, and the base assembly, the cover including (d-1) an enclosure having both a bottom edge defining an open bottom, and an insul

Abstract: An electromagnetic switch has a solenoid coil, a sleeve and a movable core which slides in the sleeve. A metal thin film is formed on an outer peripheral surface of the movable core by electroplating. The metal thin film is harder than the inner surface of the sleeve, and has high melting point and high smoothness. Accordingly, adhesive wear between the sleeve and the movable core is reduced, and sliding durability under high temperature is improved.

Abstract: A magnetic proximity switch comprises an elongated, substantially cylindrical body which houses a switching circuit, said switching circuit closing when a magnetic target passes within a certain range of the switch. This switching circuit preferably comprises two leaf portions hermetically sealed in a glass enclosure within the switch body, a biasing magnet being positioned adjacent one leaf portion for generating a flux that is shared with the one leaf portion, extending the magnetic field toward the end of the switch body and effectively increasing the sensing range of the switch. The switch also is equipped with a plurality of visual indicators, preferably light-emitting diodes, which are illuminated when the switch is closed to provide immediate visual indication as to the position of the switch, regardless of the rotational orientation of the switch.

Abstract: A magnet tool and method of assembly, utilizes an alignment insert in a central opening of the magnet to coaxially align fastener guide holes through polar plates or protective covers on opposing planar sides of the magnet and a fastener guide hole in the insert, whereby insertion of the fastener through the guide holes laterally aligns the components of the assembly without the use of adhesive. A method of assembly of the tool without the use of adhesive is also described.

Abstract: The present invention relates to a switch with a rocker, which has an affixed magnet, capable of being reliably opened or closed by a mechanical operation of a magnetized rocker. The present invention comprises of a supporting plate and a plurality of electromagnets occurring a magnetic force when a power is supplied thereto and being disposed in a bottom surface of the supporting plate. Further, the present invention has a rocker made of a magnetic substance, magnetized in order to occur repulsion with the electromagnet and then rotated by a predetermined angle. Furthermore, the present invention at least one magnet for magnetizing the rocker and retaining an inclined state of the rocker by the if occurred attraction with the electromagnet, and being disposed on the rocker.

Abstract: The present invention relates to an electromagnetically controlled drive device, in particular a ratio meter, the device being of the type comprising: a set of control coils (10, 20); a frame (50) which carries the set of coils (10, 20); equipment including a magnet suitable for being pivoted by the set of control coils (10, 20); and magnetic shielding (100) surrounding the set of coils (10, 20) and the support frame, at least in part, the device being characterized by the fact that the shielding (100) comprises an annular skirt (110) that is not a circular cylinder.