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| Number | Title | Issue Date |
| 6494091 | Apparatus for measuring a gravitational attraction of the earth Apparatus for measuring gravitational attraction of the Earth comprising a loop formed from a superconductor material. The loop being divided into a first portion and a second portion having a predetermined length and configuration. The loop being positio... | 12/17/2002 |
| 5936394 | Method and apparatus for measuring critical current value of superconducting wire Method and apparatus of measuring a critical current value of a superconducting wire formed by wire sections S(n), n being 1ࣘnࣘN and initially set to 1, comprising a first step (a) of determining electric currents I(m), m being 1ࣘmࣘM; a second ... | 08/10/1999 |
| 5753935 | Superconductive tunnel junction array radiation detector In a radiation detection device using superconducting tunnel junctions, the increase in electric capacitance and the decrease in electric resistance due to the increase in junction area for improvement of the detection efficiency are largely repressed by ... | 05/19/1998 |
| 5633583 | Magnetic telescope with enhanced noise suppression A magnetic telescope utilized to detect flaws in underground articles such as underground piping, implements multiple stages in the form of geometric and electronic configurations to enhance noise suppression. The geometric configuration includes a differ... | 05/27/1997 |
| 5619141 | Thermopower mapping of superconducting cuprates The invention comprises a method for determining the hole or electron concentration, transition temperature, ratio Tc /Tc (max), or state of doping of a material capable of exhibiting superconductivity when cooled below its critical ... | 04/08/1997 |
| 5463518 | Magnetic head and magnetic recording and reproducing apparatus using a superconducting quantum interference device A magnetic head has a superconducting quantum interference device having a ring made of a superconductive material including a Josephson junction which links to a magnetic flux generated by a magnetic recording medium, and a magnetic pole for guiding the ... | 10/31/1995 |
| 5406847 | Superconducting gyroscope A superconducting gyroscope of the present invention includes a circuit which produces a magnetic field which is synchronous with the rate of rotation experienced by the gyroscope, a sensing circuit for converting the synchronous magnetic field into an el... | 04/18/1995 |
| 5339025 | Method for determining the granular nature of superconductors using pulsed current The present invention provides a method for determining the granular nature of superconductive materials and devices which includes the steps of: conducting a substantially rectangular current pulse through the superconductive material, maintaining the te... | 08/16/1994 |
| 5283524 | AC magnetic susceptometer with odd harmonic measurement for analyzing superconductive magnetic materials An improved AC susceptometer and methodology for its use which is particularly suitable for the characterization of the properties of superconducting materials. Added to the circuitry of a conventional AC susceptometer is frequency domain analytical equip... | 02/01/1994 |
| 5280240 | Methodology using odd harmonic components of an induced magnetic field for analyzing superconducting magnetic materials and their properties An improved AC susceptometer and methodology for its use which is particularly suitable for the characterization of the properties of superconducting materials. Added to the circuitry of a conventional AC susceptometer is frequency domain analytical equip... | 01/18/1994 |
| 5227720 | Apparatus and method using a bifilar coil with an integrated loop/switch for resistance measurement of superconductors This invention relates to an apparatus and method for measuring the resistance of superconductors. Structures of this type, generally, allow the resistance of the superconductor to be accurately measured in a non-destructive manner by using a bifilar coil... | 07/13/1993 |
| 5223798 | Method for measuring the resistive transition and critical current in superconductors using pulsed current The present invention provides a method for measuring the intragranular and ntergranular critical current of a granular superconductive material, comprising the steps of: 1) conducting a substantially rectangular electronic pulse through the material so as... | 06/29/1993 |
| 5179342 | Superconductor quench measuring device which evaluates reflected pulses In a method and apparatus for detecting and locating a quench zone in a superconducting coil, a sensor is positioned adjacent to and in heat transfer communication with the entire length of the superconducting coil. When a portion of the superconducting c... | 01/12/1993 |
| 5134360 | Apparatus and method for critical current measurements An apparatus for the measurement of the critical current of a superconductive sample, e.g., a clad superconductive sample, the apparatus including a conductive coil, a means for maintaining the coil in proximity to a superconductive sample, an electrical ... | 07/28/1992 |
| 5126655 | Apparatus for observing a superconductive phenomenon in a superconductor An apparatus for observing a superconductive phenomenon is disclosed. In the apparatus, a cooling unit cools a superconductor having a threshold temperature at which the superconductor changes from the normal conductive phase to the superconductive phase,... | 06/30/1992 |
| 5113135 | Critical field and continuity testing method and device for superconducting materials using the change in internal area of a superconducting loop The area of a loop made of superconducting material is decreased to incre the magnetic field on the surface of a test piece adjacent the loop for determining the critical field, Hc, of the test piece. A loop with a gap having a temporary plug ... | 05/12/1992 |
| 5065087 | Apparatus for observing a superconductive phenomenon in a superconductor An apparatus for observing a superconductive phenomenon is disclosed. In the apparatus, a cooling unit cools a superconductor having a threshold temperature at which the superconductor changes from the normal conductive phase to the superconductive phase,... | 11/12/1991 |
| 5063472 | Device for detecting superconductor quenching and application to a superconducting current limiter Device for detecting the quenching of part a superconducting element comprising two identical superconducting conductors electrically connected in parallel is provided with means (104, 105, 109, 110) of detecting a difference in intensity or phase between... | 11/05/1991 |
| 5059891 | Microwave method for detection of weak links in superconductors Weak links in superconductors are detected by observing the effect of magnetic field modulation on the microwave resistance of superconductors. The phase detected response to the magnetic modulation can show a peak at Tc. The presence of peak(s... | 10/22/1991 |
| 5053707 | Apparatus for positioning a pick-up coil for detecting magnetic flux quantum trapped in a superconductor A head with a pick-up coil is attached to a supporter so that the head is freely movable along the direction perpendicular to the surface of a superconductor. Fluid spouted from the spout hole of the head maintains the height (gap space) of the head from ... | 10/01/1991 |
| 5053705 | Read/write coaxial magnetic head for use with apparatus for measuring the surface of superconductors A read/write head particularly suitable for mapping the superconductive properties of a sample of superconducting material. The head is arranged so that the reading and writing gaps are coaxial. Although the gaps are coaxial, the reading gap and the writi... | 10/01/1991 |
| 5030912 | Apparatus and method for mapping inhomogeneities on the surface of bulk and thin film superconductors Apparatus and methodology for mapping the superconductive properties of a sample of superconducting material. The material is cooled so that it is a mixed state and an alternating magnetic field is induced in a portion of the sample to be tested. The harm... | 07/09/1991 |
| 5015952 | Apparatus for characterizing conductivity of materials by measuring the effect of induced shielding currents therein Apparatus and method for noncontact, radio-frequency shielding current characterization of materials. Self- or mutual inductance changes in one or more inductive elements, respectively, occur when materials capable of supporting shielding currents are pla... | 05/14/1991 |
| 5004726 | Apparatus and methodology for the non-contact testing of materials for superconductivity by detecting odd harmonics above a threshold Apparatus and methodology for the rapid and inexpensive characterization of superconducting materials. The method and apparatus induces an alternating magnetic field in the sample to be tested. If the material is a superconductor odd harmonics are generat... | 04/02/1991 |
| 4978922 | Superconducting sensor for quench detection in a superconductor The present invention provides a straightforward sensor and method for quench detection in a superconducting coil, magnet or inductor. The superconducting sensor of the present invention consists of a probe having a twisted loop of superconducting wire in... | 12/18/1990 |
| 4959614 | Apparatus for determining microwave characteristics of superconductive materials using a resonant cavity and calibration waveguides Apparatus for determining the electrical characteristics of a superconductive material in a range of microwave frequencies and in a range of cryogenic temperatures has the material incorporated within a resonant cavity mounted on a cold finger for maintai... | 09/25/1990 |
| 4931732 | Magnetic flexure system for determining superconductive properties of a sample A cantilever beam is employed to place a magnet in proximity to a sample while the sample is maintained at a superconducting temperature. The magnet causes the sample, assuming it is superconductive, to itself generate a magnetic field which interacts wit... | 06/05/1990 |
| 4912408 | Distance measuring system using superconducting quantum interference device Disclosed is a distance measuring system suitably usable in a semiconductor microcircuit manufacturing lithographic apparatus such as an aligner or a stepper, for measuring the position or the distance of movement of a movable object such as a mask stage ... | 03/27/1990 |
| 4904929 | Method for detection of weak links in the current path of electrically continuous superconductors Weak links in electrically continuous superconductors are detected by observing the effect of magnetic field modulation on the dc resistance of superconductors. The phase detected response to the magnetic modulation shows a peak at Tc. The pres... | 02/27/1990 |
| 4873482 | Superconducting transmission line particle detector A microvertex particle detector for use in a high energy physic collider including a plurality of parallel superconducting thin film strips separated from a superconducting ground plane by an insulating layer to form a plurality of superconducting wavegui... | 10/10/1989 |
| 4851762 | Novel technique using magnetic field dependent phase detection for detection of superconductivity The invention relates to a method and apparatus to detect the superconductive state by measuring the change in the resistance of a sample. A dc magnetic field is imposed on the sample while the temperature is swept. The strength of the magnetic field is h... | 07/25/1989 |
| 4687987 | Beam current sensor A current sensor for measuring the DC component of a beam of charged particles employs a superconducting pick-up loop probe, with twisted superconducting leads in combination with a Superconducting Quantum Interference Device (SQUID) detector. The pick-up... | 08/18/1987 |
| 4629536 | Multilayer depth profile method Methods are provided for analyzing multilayer structures. The multilayer structure is electrolytically anodized at constant current through a plurality of layers of the structure over a predetermined surface area. During the anodization, the change of the... | 12/16/1986 |
| 4605897 | Apparatus and method for distance determination between a receiving device and a transmitting device utilizing a curl-free magnetic vector potential field A method for measurement of distance using the curl-free vector potential radiation field. The system includes current-carrying apparatus for generating a predominantly curl-free vector potential field and apparatus for modulating the current applied to t... | 08/12/1986 |
| 4581580 | Intentionally non-orthogonal correction coils for high-homogeneity magnets In the design of large electromagnets having high magnetic field uniformity requirements it is common practice to employ a set of correction coils and coil circuits, each coil being excited so as to correct for a specially defined, symmetrically shaped er... | 04/08/1986 |
| 4563648 | Geometric compensation of magnetic susceptibility perturbations in an RF spectrometer In a gyromagnetic analysis apparatus where the sample is spun about an axis to average over azimuthal inhomogeneities, the axial magnetic properties of the sample space are improved by shaping the coil conductor as a function of axial coordinate to exhibi... | 01/07/1986 |
| 4535291 | Method for superconducting magnet shimming Component coils for providing a desired magnetic field distribution, which coils are subject to interaction via mutual inductance thereof, are connected each to respective current regulated power supplies whereby the interaction is compensated. Circuits a... | 08/13/1985 |
| 4498046 | Room temperature cryogenic test interface This interface permits the testing of high speed semiconductor devices (room-temperature chips) by a Josephson junction sampling device (cryogenic chip) without intolerable loss of resolution. The interface comprises a quartz pass-through plug which inclu... | 02/05/1985 |
| 4460869 | Determining the state of the surface of a moving body using eddy currents to obtain first and second runout profiles of the body A method and apparatus for monitoring the state of the surface of a moving body wherein a four-terminal eddy-current coil circuit is connected in a feedback loop of an RC resonator. The eddy-current coil circuit is placed in proximity to the monitored sur... | 07/17/1984 |
| 4180769 | Superconducting solenoid with compensation for axial gradients A superconducting solenoid with compensation for axial gradients of orders 1 through 7 is formed of a superconducting wire having a rectangular cross-section. The wire is wound as a solenoid having a longitudinal axis and multiple helical layers, adjacent... | 12/25/1979 |
