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5861788 |
Superconducting coil
In application to a superconducting magnet which is cooled by a cryogenic refrigerator, provided is a superconducting coil which can maintain a cooled state and enables a stable operation and...
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5847633 |
Apparatus and method for the rapid discharge of a superconducting magnet coil
A device for the safe discharge of a superconducting magnet coil (4) which is located inside a cryostat (2) and superconductively short-circuited by a superconducting switch (7) providing at or in...
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5842348 |
Self-contained cooling apparatus for achieving cyrogenic temperatures
A cryogenic cooling apparatus including a vacuum container for containing an object to be cooled, at least one refrigerator for cooling the object, and a thermal switch unit. The refrigerator has a...
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5828280 |
Passive conductor heater for zero boiloff superconducting magnet pressure control
A passive non-electric pressure control system for a superconducting magnet cryogen vessel to maintain internal pressure above the outside pressure to avoid cryopumping utilizes a passive thermal...
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5818319 |
Magnets for magnetic resonance systems
Procedures for designing magnets, including superconducting magnets, shim magnets, and gradient magnets for magnetic resonance systems, are provided. The procedures involve the use of a simulated...
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5812042 |
Superconducting magnet formed by laminating hollow conductor plates
A laminated superconducting magnet includes a multilayer short-circuit superconductor group 2 formed by uniting superposed hollow superconducting plates, and an exciting coil 3 for inducing a...
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5812043 |
Short superconducting annular MRI electro-magnet
A superconducting annular electro-magnet for MRI purposes includes an annular winding within which a generally cylindrical space is provided. The winding adjacent each end of the space is formed...
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5805036 |
Magnetically activated switch using a high temperature superconductor component
A magnetically-activated switch including a high temperature superconductor. The magnetic switch includes a high temperature superconductor coupled at both ends to a rigid beam, a thermal shield...
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5801609 |
MRI head magnet
A magnetic resonance imaging (MRI) magnet includes different-diameter, longitudinally-proximate, first and second coil form segments. First and second superconductive coils are wound, respectively,...
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5798678 |
Superconducting wind-and-react-coils and methods of manufacture
A process for manufacturing superconducting magnetic coils from strain-tolerant, superconducting multi-filament composite conductors is described. The method involves winding the precursor to a...
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5781581 |
Induction heating and melting apparatus with superconductive coil and removable crucible
An induction heating apparatus having a refractory vessel for holding a quantity of material to be heated by the apparatus. The vessel being surrounded by, but does not touch, an induction coil...
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5774032 |
Cooling arrangement for a superconducting coil
A superconducting device, such as a superconducting rotor for a generator or motor. A vacuum enclosure has an interior wall surrounding a cavity containing a vacuum. A superconductive coil is...
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5759960 |
Superconductive device having a ceramic superconducting lead resistant to breakage
A superconductive device (e.g., magnet) having a superconductive lead assembly and cooled by a cryocooler coldhead having first and second stages. A first ceramic superconductive lead has a first...
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5757257 |
Permanent current switch and superconducting magnet system
Superconducting magnet system using a liquid helium for its operation and a permanent current switch and a system thereof applied to the superconducting magnet system employing a permanent current...
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5753380 |
High purity aluminum alloy conductor for use at ultra low temperatures
The present invention concerns an aluminum alloy conductor of a cryostatic stabilizer for use at ultra low temperatures of 30° K. or lower which is provided on and around a superconductor. The...
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5742217 |
High temperature superconductor lead assembly
A high temperature superconductor lead assembly for reduces the heat leak into a cryocooled magnet system includes a superconductor and a first lead connector bonded to a first end of the...
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5739997 |
Superconducting-magnet electrical circuit offering quench protection
A superconductive-magnet electrical circuit includes a superconductive-coil assemblage having a second coil portion coupled in series with and between first and third coil portions with the third...
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5735127 |
Cryogenic cooling apparatus with voltage isolation
A cryogenic cooling apparatus (cryocooler) with voltage isolation includes a cold end structure, which may be placed in thermally and electrically conductive contact with an electrically charged...
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5726512 |
Vibration-free levitated platform
An isolation system for isolating a first object from vibrations from a second object. Such vibrations will have three orthogonal components, one oriented along a line between the objects, and two...
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5721522 |
NMR Spectrometer with superconducting magnet coil
In a superconducting magnet coil configuration, in particular for a high resolution analytical nuclear resonance (NMR) spectrometer, with a cryostat having extremely low heat losses (low loss),...
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5721523 |
Compact MRI superconducting magnet
A closed magnetic resonance imaging (MRI) magnet has a single superconductive coil assembly including a coil housing containing a cryogenic fluid dewar containing a pair of longitudinally-outermost...
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5720173 |
Gas-cooled bushing in cryotanks for superconducting applications
A cooling device for cooling of current leads (6, 7) in the bushings of a cryotank (1), wherein the current leads in the gas-filled part of the cryotank are designed as plate-formed sub-leads (12)...
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5710531 |
Static field converter
A device for the conversion of a static magnetic field into electrical energy comprising a permanent or electromagnet for establishing a stationary (static) magnetic field, one or more coils...
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5708405 |
Superconducting coil and manufacturing method thereof
A superconducting coil bas a winding wire portion which is formed by winding a superconducting wire covered with an insulating material around a winding frame composed of such a material that its...
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5701112 |
Cryogenic MRI magnets
An electromagnet for use in MRI apparatus comprising an annular vessel inside which annular windings energizable to produce a magnetic field are contained together with iron components, hereinafter...
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5696476 |
Open architecture magnetic resonance imaging superconducting magnet assembly
A passively shimmed open architecture magnetic resonance imaging magnet utilizing separated superconducting coil assemblies with open space between including means to obtain a uniform magnetic...
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5691679 |
Ceramic superconducting lead resistant to moisture and breakage
A superconductive lead assembly for a superconductive device (e.g., magnet) cooled by a cryocooler coldhead having first and second stages. A first ceramic superconductive lead has a first end...
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5691678 |
Electromagnets
A superconducting electromagnet comprising an annular inner helium container vessel within which the windings of an annular magnet are contained, an outer annular vacuum chamber within which the...
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5689223 |
Superconducting coil
In order to make it possible to produce superconducting coils with small overall height, they are made from a plurality of coil subunits, optionally with a plurality of layers for each coil...
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5686876 |
Superconducting magnet apparatus
The superconducting magnet apparatus includes a cryostat, a superconducting coil provided in the cryostat, and a current lead having a portion made of an oxide superconductor, for supplying a...
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5684616 |
Moving mirror apparatus
A moving mirror apparatus for scanning a light beam, such apparatus having a mirror associated with a support member able to be repulsed by a superconductor, the mirror/support member being...
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5682128 |
Superconducting reentrant resonator
A reentrant resonator has a center conductor fixed to an end wall and surrounded by side walls of a housing, where end walls, side walls, and center conductors are all coated with a...
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5680086 |
MRI magnets
A magnetic resonance imaging (MRI) magnet comprising opposing pole pieces which define between them an imaging volume, the pole pieces comprising pole plates which are fabricated from wound high...
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5680085 |
Magnetic field generator, a persistent current switch assembly for such a magnetic field generator, and the method of controlling such magnetic field generator
A magnetic field generator has a superconductive coil immersed in a coolant material. When power is supplied to the superconductive coil from a suitable power source, the superconductive coil is...
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5668515 |
Superconductive magnet apparatus
To achieve a superconductive magnet apparatus which can suppress the consumption of liquid helium even if a quench phenomenon occurs in the superconductive coil to prevent a reduction in its...
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5668516 |
Simplified active shield superconducting magnet assembly for magnetic resonance imaging
An improved actively shielded superconducting magnet in which the main and bucking coils are directly wound onto respective coil support structures made of glass fiber-reinforced epoxy. The main...
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5661445 |
Superconductive magnet assembly
A superconductive magnet assembly is disclosed. The superconductive magnet assembly includes a primary magnet formed of a coil of superconductive material, a magnet former supporting the primary...
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5659277 |
Superconducting magnetic coil
A superconducting magnetic coil formed of anisotropic high temperature superconducting material includes ferromagnetic flanges positioned coaxial to the longitudinal axis of the coil and at the...
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5659278 |
Superconducting magnet device, magnetizing device and method for superconductor
A superconducting magnet device and magnetizing device for superconductor including a coil provided around the superconductor; a current supply line connected to the coil and a power source and...
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5659281 |
Structured coil electromagnets for magnetic resonance imaging
Superconducting electromagnets suitable for use in the NMR tomography of human organs, and a method of making the same, are disclosed. Each of the disclosed electromagnets are constructed according...
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5651256 |
Superconductive magnet having a thermal shield
A superconductive magnet has a superconductive coil surrounded by a thermal shield surrounded by a vacuum enclosure. The thermal shield has one and preferably several flexible layers of thermally...
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5649353 |
Method for making an electrical coil
A method for making an electrical coil such as a superconductive switch or an energy dump resistor. The midportion of a coil wire, whose ends are wound around two supply spools, is looped around a...
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5635888 |
Super-conducting magnets
A super-conducting magnet, particularly suitable for use with an MRI system is provided. The super-conducting magnet includes a closed loop former, a coil winding around the former of a material...
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5631616 |
Magnetic field generating device for use in MRI
A magnetic field generating device for use in MRI having a pair of pole pieces opposed at a space to each other and generating a magnetic field in the space, wherein the pole piece has a laminate...
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5631617 |
System for levitating and guiding object by electromagnetic attractive force
A system for levitating and guiding an object by a magnetic force, which is typically a superconducting magnetic support apparatus or a superconducting linear convey system, comprises a support...
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5631618 |
Magnetic arrays
Electromagnet arrays which can provide selected field patterns in either two or three dimensions, and in particular, which can provide single-sided field patterns in two or three dimensions. These...
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5625332 |
Oxide superconducting wire and superconducting apparatus thereof
A superconducting wire comprising a conductor core composed of an oxide superconducting material and a sheath material composed of conductive metal formed at periphery of the conductor core,...
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5625331 |
Superconducting deflection electromagnet apparatus
A superconducting deflection electromagnet apparatus for deflecting an electron beam includes a liquid helium reservoir 21 disposed outside of the magnetic shield 11 surrounding the cryostat 4...
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5623430 |
Method for passively shimming an open magnet
A method for passively shimming an open magnet having a magnetic field with an inhomogeneity including an amount of positive 2, 0 Legendre polynomial harmonics. The magnetic field is mapped and the...
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5623240 |
Compact superconducting magnet system free from liquid helium
In a superconducting magnet system which has a superconducting coil member, a cryocooler for cooling the superconducting coil member into the superconducting state, and a current lead for supplying...
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