Quotables
"It is my heart-warmed and world-embracing Christmas hope and aspiration that all of us, the high, the low, the rich, the poor, the admired, the despised, the loved, the hated, the civilized, the savage (every man and brother of us all throughout the whole earth), may eventually be gathered together in a heaven of everlasting rest and peace and bliss, except the inventor of the telephone. "
Mark Twain ; Christmas greetings, 1890
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| Number | Title | Issue Date |
| 7394628 | Method and apparatus for regulation of electrical power An apparatus for regulation of electrical power has a superconducting member exhibiting a capability of quenching at the electrical current exceeding a threshold value, a metallic member coupled to the superconducting member, a thermally insulated and tight internal... | 07/01/2008 |
| 7375933 | High voltage design structure for high temperature superconducting device In accordance with the present invention, modular corona shields are employed in a HTS device to reduce the electric field surrounding the HTS device. In a exemplary embodiment a fault current limiter module in the insulation region of a cryogenic cooling system has... | 05/20/2008 |
| 7193825 | Superconducting fault current limiter A superconducting current limiting device (30) comprising: an interconnected high magnetic permeability structure including a central core (50) interconnected to at least a first and second arm (31, 32) branching off therefrom; a superconductive... | 03/20/2007 |
| 6900714 | System and method for quench and over-current protection of superconductor A system and method for protecting a superconductor. The system may comprise a current sensor operable to detect a current flowing through the superconductor. The system may comprise a coolant temperature sensor operable to detect the temperature of a cryogenic cool... | 05/31/2005 |
| 6809910 | Method and apparatus to trigger superconductors in current limiting devices A method and apparatus for magnetically triggering a superconductor in a superconducting fault current limiter to transition from a superconducting state to a resistive state. The triggering is achieved by employing current-carrying trigger coil or foil on either or... | 10/26/2004 |
| 6337785 | Fault current limiter A superconducting fault current limiter is provided which is capable of ensuring a sufficient impedance for restricting an excessive current flow caused by an accident and completely satisfying a canceling condition of a magnetic field during normal opera... | 01/08/2002 |
| 5999383 | Arrangement for detecting quenches in superconducting coils A multi-stranded superconducting coil includes compensation windings for use in detection of quenches in the coil. The compensation windings are formed as an integral part of the coil by co-winding a non-superconducting strand along with the superconducti... | 12/07/1999 |
| 5930095 | Superconducting current limiting device by introducing the air gap in the magnetic core A superconducting current limiting device protects an electric circuit from a fault current. The device comprises a magnetically saturable core having saturated and non-saturated states and an input coil for electrically coupling the core to the electric ... | 07/27/1999 |
| 5862028 | Method and apparatus for detecting quenching of a coil for a superconducting magnet Quenching of a coil for a superconducting magnet is detected by placing a temperature sensor proximate the coil of the superconducting magnet and monitoring the temperature sensor for a rise in temperature of the coil of the superconducting magnet. AC and... | 01/19/1999 |
| 5617280 | Superconducting fault current limiter A current limiter having a plurality of current limiting units provided for electric paths constituting a plurality of phases. Each current limiting unit is constituted by a superconducting coil functioning as a first current limiting element formed in a ... | 04/01/1997 |
| 5600522 | High temperature superconducting fault current limiter A fault current limiter (10) for an electrical circuit (14). The fault current limiter (10) includes a high temperature superconductor (12) in the electrical circuit (14). The high temperature superconductor (12) is cooled below its critical temperature t... | 02/04/1997 |
| 5596469 | Apparatus for limiting high current electrical faults in distribution networks by use of superconducting excitation in transverse flux magnetic circuit An electrical fault limiter having first, second, third, and fourth magnetic cores. The first magnetic core opposes the second magnetic core and is adjacent to the third magnetic core. The fourth magnetic core opposes the third magnetic core and is adjace... | 01/21/1997 |
| 5546261 | Superconducting fault current limiter A superconducting fault current limiter composed of an induction coil wound around a core made of a soft magnetic material such as soft iron, ferrite or the like, a cylindrical superconductive body arranged in surrounding relationship with the induction c... | 08/13/1996 |
| 5476719 | Superconducting multi-layer microstrip structure for multi-chip modules and microwave circuits A multi-layer microstrip structure includes a substrate and a first superconducting layer deposited on the substrate. A first dielectric layer, made at least partially of benzocyclobutene (BCB), is deposited on the first superconducting layer. Additional ... | 12/19/1995 |
| 5379020 | High-temperature superconductor and its use In the case of high-temperature superconductors (6) which are used as inductive current limiters, unless any special precautionary measure is taken, there is a risk that short-circuit currents can lead to local stress centers and hot spots, and to local d... | 01/03/1995 |
| 5334964 | Current limiting choke coil A device having cores of metal oxide ceramic (for example, Y-Ba-Cu-O) for limiting a short circuit current in power supply systems. The concept provides that a choke core, when operated at a rated current, is superconductive and its shielding currents kee... | 08/02/1994 |
| 5250508 | Superconductor current-limiting apparatus The invention relates to superconductor current-limiting apparatus of the type having a magnetic core around which firstly a superconductor component is disposed, followed by an electric coil made of non-superconducting material, the apparatus being desig... | 10/05/1993 |
| 5225956 | Superconducting AC current limiter equipped with quick-recoverable trigger coils In a superconducting AC (alternating current) current limiter, quenched trigger coil assembly is quickly recovered to the superconductive state by minimizing a loop current flowing through the trigger coil assembly. The superconducting AC current limiter ... | 07/06/1993 |
| 5225957 | Current limiting device An improvement of a current limiting device using a superconductive coil. A trigger coil and current limiting coils are formed as a superconductive coil. A switching element which is actuated when a current limiting operation by the current limiting coil ... | 07/06/1993 |
| 5218505 | Superconductor coil system and method of operating the same A superconducting coil system includes an excitation power source, a superconducting coil, a DC circuit breaker connected in series between the excitation power source and the superconducting coil to disconnect them when quenching occurs, a protective res... | 06/08/1993 |
| 5216568 | Superconducting magnet device A superconducting magnet device which is capable of protecting at the time of quenching a superconducting magnet divided into a plurality of sections comprises a superconducting magnet circuit which is formed by sequentially connecting in series coil pair... | 06/01/1993 |
| 5210674 | Superconducting coil protective system A superconducting coil protective system comprises a quenching detector (QD) for detecting occurrence of a quenching in a superconducting coil (L) and generating a quenching signal indicative of the occurrence of the quenching. In response to the quenchin... | 05/11/1993 |
| 5153804 | Hybrid current limiter having superconductor windings A hybrid current limiter comprising a first winding of non-superconducting conductive material having a large number of turns and electrically connected in series with a superconductoring coil of low self-inductance and placed in a cryostat, and a second ... | 10/06/1992 |
| 5140290 | Device for inductive current limiting of an alternating current employing the superconductivity of a ceramic high-temperature superconductor A device for inductive current limiting of an alternating current consisting of an induction coil (2), which includes at least one winding and through which current flows, a body (3) made of a ceramic high-temperature superconductor arranged concentricall... | 08/18/1992 |
| 5121281 | High tension DC current-limiting circuit breaker The invention relates to a circuit breaker for limiting a direct current and comprising a combination of first means including superconducting windings for limiting the current and second means for interrupting the residual current. The invention is appli... | 06/09/1992 |
| 5067044 | Sensor for detecting a quench in a superconductor using an optical coupling A quench detector for a superconducting coil is provided which utilizes an optical coupling and a rotary encoder. The presence of a resistive voltage in the superconducting coil created by a quench will cause a rotatable readout coil to move. Movement of ... | 11/19/1991 |
| 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 |
| 5021914 | Superconducting switch and current limiter using such a switch There is disclosed a superconducting switch including two superconducting coils wound on a common bobbin wherein these coils have the same critical current value, and are connected in parallel so that magnetomotive forces which are the same in magnitude a... | 06/04/1991 |
| 4994935 | Superconducting magnet apparatus with an emergency run-down system A superconducting magnet apparatus comprising a superconducting main coil (1) for generating a uniform magnetic field and at least one superconducting shim coil (2a, 2b) electromagnetically coupled to the superconducting main coil (1) for increasing the u... | 02/19/1991 |
| 4994932 | Superconducting current limiting apparatus A superconducting current limiting apparatus includes a first container, a superconducting current limiting element accommodated in the first container, a refrigerant filling the first container for cooling the superconducting current limiting element acc... | 02/19/1991 |
| 4922367 | Circuit for preventing latch-up of parasitic thyristor formed in CMOS integrated circuit A CMOS circuit including a variable conductor means interposed between a power supply and the CMOS circuit. The CMOS circuit comprises a P channel MOS FET and an N channel MOS FET laterally formed on the surface of a semiconductor substrate, inherently pr... | 05/01/1990 |
| 4910626 | Current limiter A current limiter comprising a cryostat provided with a first insulating feedthrough for an inlet conductor and a second insulating feedthrough for an outlet conductor, and a conductor running from one feedthrough to the other inside the tank, said conduc... | 03/20/1990 |
| 4876510 | Apparatus for nuclear spin tomography having superconducting base field magnetic coils and a radiation shield Magnet coil system for nuclear spin tomography has superconducting coils for generating a homogeneous magnetic base field and nonsuperconducting coils within an interior region defined by the base field coils for developing magnetic field gradients. At le... | 10/24/1989 |
| 4689707 | Superconductive magnet having shim coils and quench protection circuits A superconductive magnet has a main coil for creating a primary magnetic field and a plurality of shim coils for correcting aberrations in different gradients in the primary field. The shim coils are also connected in shunt with shim quench heaters and wi... | 08/25/1987 |
| 4568908 | Compact resistor assembly The resistor assembly includes a plurality of resistor sections each in the form of resistive plates in which slots have been cut to provide a continuous resistive element of low inductance. The resistor sections are stacked together with thin insulating ... | 02/04/1986 |
| 4559576 | Protection device for a superconducting magnetic coil assembly The device is for a superconducting magnetic coil assembly that is to be cryogenically cooled by a liquid coolant, and is subdivided into several partial winding sections that are connected one after the other to protect the assembly in the event of an un... | 12/17/1985 |
| 4544979 | Automatic current lead retractor system for superconducting magnets An automatic current lead retraction system for superconducting magnet installations. An automatic current lead retraction system utilizes an operator wherein either hydraulic or pneumatic cylinders bring about electrical contact of the current leads or t... | 10/01/1985 |
| 4528609 | Method and apparatus for protecting superconducting magnetic energy storage systems during rapid energy dissipation A method and apparatus are provided for protecting a superconducting magnetic energy storage system having a coil from damage caused by a change of state of at least a portion of the coil from superconducting to normal conducting, and the consequent conve... | 07/09/1985 |
| 4490769 | Solid-state circuit breaker with current limiting characteristic using a superconducting coil A thyristor bridge interposes an ac source and a load. A series connected DC source and superconducting coil within the bridge biases the thyristors thereof so as to permit bidirectional ac current flow therethrough under normal operating conditions. Upon... | 12/25/1984 |
| 4486800 | Thermal method for making a fast transition of a superconducting winding from the superconducting into the normal-conducting state, and apparatus for carrying out the method A method and apparatus for making a fast transition of the entire superconducting winding of an electrical apparatus, which is arranged in a vacuum chamber and is cooled by a cryogenic medium, from the superconducting operating state into the normal-condu... | 12/04/1984 |
