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5307039 |
Frustoconical magnet for magnetic resonance imaging
An open magnet having a frustoconical shaped inner bore is provided for MR imaging. The magnet has a plurality of axisymmetric superconducting coils of differing diameters which are disposed along...
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5294904 |
Valve block, in particular for slip-controlled hydraulic brake systems
A valve block, in particular for slip-controlled hydraulic brake systems, includes a plurality of valve domes (10) incorporating magnet coils (1) and insulating casings cast around the magnet coils...
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5293524 |
Uniformly wound superconducting coil and method of making same
A coil of superconducting wire for a superconducting magnet having a relaely dense and uniformly spaced winding to enhance the homogeneity and strength of the magnetic field surrounding the coil...
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5291169 |
Open architecture magnetic resonance imaging superconducting magnet assembly
An open architecture Magnetic Resonance Imaging Magnet with a pair of spaced annular superconducting magnet assemblies utilizing a cantilevered main magnet coil and correction magnet coil within...
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5289151 |
Electrical coils
A method of designing a coil or set of coils to achieve a coil with minimum or substantially minimum inductance to produce a desired magnetic field.
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5283544 |
Magnetic field generating device used for MRI
A magnetic field generating device used for MRI includes a pair of magnetic pole pieces to each other to provide a gap therebetween and generate a magnetic field in the gap, the magnetic pole...
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5274904 |
Guideway coil of laminated foil construction for magnetically levitated transportation system
Electromagnetic coils of laminated, foil construction are suitable for use in guideways of magnetically-levitated-vehicle systems. The coils are each constructed by applying a double-sided adhesive...
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5262727 |
NMR probe
An NMR probe having RF shield means to confine the RF magnetic field to an axial region having a length less than the length of the coil form.
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5247272 |
Dipole coil and structure for use in the manufacture thereof
A dipole coil for use in a superconducting electromagnet employs two saddle-shaped coils in a diametrically opposed relationship. Each of the saddle-shaped coils includes central linearly extending...
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5245306 |
Actively shielded magnet for magnetic resonance apparatus
A magnet system for generating a uniform magnetic field in an examination zone (5) in an accommodation space of magnetic resonance apparatus is formed by a first, approximately cylindrical...
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5237298 |
Superconducting energy storage magnet
A superconducting magnet is formed having composite conductors arrayed in coils having turns which lie on a surface defining substantially a frustum of a cone. The conical angle with respect to the...
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5237300 |
Support structure for actively shielded superconducting magnets
A cantilevered trapezoidal-toroidal structure is provided in an active magnetic shielding system for a superconducting magnet to support the bucking magnet coils in spaced relationship to the main...
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5227756 |
Modulation of magnetic fields formed by solenoids
Temporal and spatial modulation of magnetic fields created around solenoids and within their hollow is effected using specially configured and movable superconducting elements as well as switchable...
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5227755 |
Winding configuration for a cryomagnet
Winding arrangements for cryomagnets have a winding of superconducting wire (12) connected in parallel to a winding of normally conducting wire (11) which, in the event of a quench, conducts the...
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5208571 |
Magnet winding with layer transition compensation
A magnet winding in a air coil configuration with windings made from conducting elements which surrounds a magnetic field axis and is wound in at least two layers with at least one layer...
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5204650 |
Switch for controlling current flow in superconductors
A superconductive switch is provided with a pair of superconductive routes which are wound around a cylindrical core in a bifilar fashion. One superconductive wire is constituted of a pair of...
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5185575 |
Magnetic resonance imaging apparatus with artefact reduction
A high order multipole gradient field generating system in a magnetic resonant imaging apparatus comprises spaced quadrants of windings, the windings of each quadrant generating adjacent fields in...
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5185576 |
Local gradient coil
A compact local gradient coil is combined with a local RF coil to provide lower powered, higher strength gradient fields and faster gradient response as is useful in magnetic resonance imaging....
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5177443 |
Nuclear magnetic resonance apparatus
In a nuclear magnetic resonance apparatus and RF coil arrangement comprises two or more separable parts (51 and 53) adapted to be assembled around the body to be examined to form the coil...
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5173677 |
Superconducting magnetic energy storage system with low friction coil support
A superconducting magnetic energy (SMES) system having an axially sectioned multilayered solenoid coil immersed in a liquid helium bath contained in annular helium vessel includes as an interface...
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5173678 |
Formed-to-shape superconducting coil
A superconducting coil assembly. The assembly includes an insulating substrate, a plurality of insulating layers disposed in a stacked assembly on the substract, and a superconducting spiral...
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5168211 |
Magnet system
A magnet system to generate a static, uniform magnetic field in the examination chamber of a nuclear spin tomograph has a pair of outer field coils (1a, 1b) arranged on a common axis (a) at a...
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5162769 |
Coaxial electromagnetic swage coil
An electromagnetic coil configuration used for swaging small tubing. The coil consists of a coaxial arrangement of an inner helical coil and an outer coil shaped as a hollow cylinder with one end...
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5160911 |
Toroidal constant-tension superconducting magnetic energy storage units
A superconducting magnetic energy storage unit is provided in which the magnet is wound in a toroidal fashion such that the magnetic field produced is contained only within the bore of the magnet,...
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5146197 |
Self-shielding homogeneous spherical gradient coils
A first set of three spherically or elliptically shaped coils is provided which generates a homogeneous linear gradient magnetic field in its interior. A second set of three spherically or...
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5140292 |
Electrical coil with overlying vitrified glass winding and method
A coil has one or more layers of primary and secondary windings about a bore liner, with the primary and secondary windings separated by a winding of glass threads. The coil is heated in an oven to...
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5136273 |
Magnet apparatus for use in a magnetic resonance imaging system
A magnet apparatus has an active magnetic shield or a cancel coil disposed coaxially with a main coil at an end portion thereof so that the structure of the magnet apparatus is simplified and the...
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5130687 |
Device for storing electromagnetic energy in toroidal superconducting windings
A device for storing electromagnetic energy in toroidal superconducting windings of circular right cross-section, wherein the device is constituted by a plurality of flat cylindrical coils having a...
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5126711 |
Superconductive coil system
A novel construction of a superconductive coil system, having sufficient coupling strength and stiffness and being easy to assemble, is disclosed. A coil retainer of a stiffened cylindrical shell...
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5117212 |
Electromagnet for charged-particle apparatus
An electromagnet for a charged-particle apparatus. The electromagnet of the first form of this invention may consist of a deflecting electromagnet comprising an iron core equipped with clamping...
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5113166 |
Magnetic field gradient coil system
A magnetic field gradient coil system for use in a magnetic resonance imaging apparatus forming a magnetic field gradient in a direction of a Z-axis of an X, Y, Z orthogonal coordinate system...
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5113164 |
Superconductors with switchable magnetic domains
A tunable electromagnetic filter includes a type II superconducting medium which exhibits a permanent ferromagnetic component after exposure to a magnetic field. A magnetic field passes through the...
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5113165 |
Superconductive magnet with thermal diode
A superconductive magnet having at least one superconductive coil is provided. A thermal radiation shield is situated inside a vacuum vessel and the thermal radiation shield encloses the...
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5111172 |
Demountable coil form for epoxy-impregnated coils
A demountable coil form for fabricating epoxy impregnated superconductive coils having a split ring and a collar clamp secured to the ring on either side of an axially extending opening for...
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5078674 |
Magnetic stimulator coils
Magnetic stimulator coils having a definable region wherein magnetic field intensity is greater than at other regions of the coil are disclosed. The definable region is formed by one or more...
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5065128 |
Hermetically sealed high-pressure solenoid coil and method
A solenoid coil is fabricated by precisioin winding a length of bondable magnet wire on a mandrel, heating and axially compressing the precision-wound convolutions to cause the bondable insulation...
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5059935 |
Solenoid coil apparatus
A solenoid apparatus having a bobbin, a core and a coil wound on a cylindrical body of the bobbin. A post of the bobbin has a slit elongated along the post and a groove. The end portion of coil is...
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5045826 |
Actively shielded magnetic resonance magnet without cryogens
An actively shielded refrigerated superconductive magnet is provided. The magnet includes a generally cylindrical vacuum vessel having an axially extending bore. A plurality of superconductive main...
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5038126 |
Precisely positioned electromagnetic relay components
An electromagnetic relay 38 (FIG. 2) includes a cylindrical core 42 concentrically positioned within a coil assembly 40 and press fit into a frame 50, a resiliently mounted armature assembly 56,...
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5036305 |
Segmented interlayer spacer bars for multilayer superconducting solenids
A spacer bar, or system of spacer bars, interposed between coil layers of a coil structure. The spacer bar comprises a block of electrical insulating material adapted to be arranged between...
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5012191 |
Gradient coil system for a nuclear magnetic resonance tomography apparatus
A gradient coil system for a nuclear magnetic resonance tomography apparatus has a set of saddle coils disposed on a first cylindrical surface for generating the x-gradient, and a set of saddle...
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5012192 |
Gradient coil system for a nuclear resonance tomography apparatus
A gradient coil system for a nuclear magnetic resonance tomography apparatus has main x and y coils, which are split arc saddle coils. The coil arcs are split so that their coupling increases with...
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5006672 |
Apparatus for storing high magnetic fields having reduced mechanical forces and reduced magnetic pollution
The present invention identifies several configurations of conducting elements capable of storing extremely high magnetic fields for the purpose of energy storage or for other uses, wherein forces...
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5001447 |
Ferromagnetic compensation rings for high field strength magnets
A reduced length, high field strength magnet, comprised of a number of superconducting magnet coils has ferromagnetic compensation rings positioned coaxially around the magnet bore axis to reduce...
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4987398 |
Multilayered eddy current type power-saved intense AC magnetic field generator
A conventionally arranged multilayered eddy current type intense AC magnetic field generator is remarkably improved only by intercrossing frame-shaped iron cores with alternately multilayered...
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4985735 |
Electric drive with manual doubler
An apparatus for cleaning surfaces from substances adhered thereto comprises a multilayer electromagnet coil (1), a source (3) of pulse current, a paramagnetic plate (4) disposed between the...
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4978936 |
Superconducting magnetic coil element having terminals bonded to the coil body
A superconducting magnetic element is provided wherein the terminals are bonded to the coil body and are independent of that coil body supporting structure. The technology employs a terminal...
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4956608 |
Apparatus for propagating a quench in a superconducting magnet
In one aspect of the present invention a superconductive magnet for use in a magnetic resonance imaging and spectroscopy is provided. The magnet comprises a cylindrical coil form having a plurality...
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4949043 |
Apparatus for rendering a static magnetic field uniform
Apparatus is provided for rendering uniform a static magnetic field which includes a plurality of radial and axial coils connected to a controlled power supply. This apparatus permits control of at...
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4939493 |
Magnetic field generator
A magnetic field generating device provides a useful magnetic field within a specific retgion, while keeping nearby surrounding regions virtually field free. By placing an appropriate current...
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