Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 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 |
| 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 |
| 5307068 | Tunable high-frequency devices A tunable high-frequency device using a superconductive thin layer with a thickness smaller than the thickness of penetration of a magnetic field is positioned on a dielectric layer. Also included is a means for varying the density of the Cooper pairs of ... | 04/26/1994 |
| 5278380 | Superconducting magnet system with inductive quench heaters A superconducting magnet coil is protected from local damage due to quenching by inductively driven heaters formed by heater strips embedded in the coil and connected in closed loops. A cold bypass diode shunting the coil winding commutates current out of... | 01/11/1994 |
| 5225395 | Supervisory system for superconductive transformer A supervisory system is used for a superconductive transformer which comprises primary to Nth-order windings (N is an integer of not less than 2) windings, and the windings are formed of superconductive lines and are wound around an outer surface of a sig... | 07/06/1993 |
| 5105200 | Superconducting antenna system A superconductive array antenna system provides a substantial improvement of gain, in the range of from about 5 db to over 20 db, at frequencies in excess of 20 gigahertz, and preferably in the range from 40 to 100 gigahertz and beyond. The antenna system... | 04/14/1992 |
| 4969064 | Apparatus with superconductors for producing intense magnetic fields Apparatus for generating a magnetic field includes a superconducting coil winding and a conducting, non-magnetic electrical field member in proximity to and insulated from the winding. The winding is energized by a direct-current source, reaching a predet... | 11/06/1990 |
| 4906861 | Superconducting current reversing switch A superconducting switching device having no moving components for reversing current flow through a load. This load typically is a superconducting magnet and, in this application, the present invention also selectively serves as a persistent switch. The i... | 03/06/1990 |
| 4680666 | MR magnet wiring harness circuit A wiring harness for a shielded superconducting magnetic resonance magnet in which resistors are connected in parallel with pairs of symmetrically connected coils. The symmetric nature of the magnetic field can be maintained during a quench since coils pl... | 07/14/1987 |
| 4528532 | Switch for fine adjustment of persistent current loops in superconductive circuits A small portion of a lead for a superconducting coil is made to function as a controllable resistor with a low resistance value and fast thermal response so as to be capable of rapidly being switched between the superconducting and resistive states. The d... | 07/09/1985 |
| 4393345 | Circuit for damping hunting by electric machines A circuit for damping hunting oscillations of controlled electric machines. The circuit is provided with a measuring circuit for determining the hunting oscillations and an identifier circuit for determining the angle components of such hunting oscillatio... | 07/12/1983 |
| 4348710 | Method and structure for compensating for variations in vapor cooled lead resistance of superconducting magnets A superconducting magnet arrangement having a sealed cryogenic environment utilizing liquid helium, a superconducting coil immersed in the liquid helium, a constant current power supply exterior of the cryogenic environment and connected to the coil by le... | 09/07/1982 |
| 4229704 | Method and means for measurement and control of pulsed charged beams A beam of bunches of charged particles is controlled by generating a signal in response to the passage of a bunch and adding to that signal a phase-flipped reference signal. The sum is amplified, detected, and applied to a synchronous detector to obtain a... | 10/21/1980 |
| 4173775 | Selective excitation of coils comprising a superconducting magnet Thermal isolation of a cryostat is improved for a superconducting solenoid having a plurality of separately energizable coils or winding sections by reducing the number of conductors required to selectively energize the persistence switch controlling a pa... | 11/06/1979 |
| 4084209 | Rotating superconductor magnet for producing rotating lobed magnetic field lines This invention provides a rotating superconductor magnet for producing a rotating lobed magnetic field, comprising a cryostat; a superconducting magnet in the cryostat having a collar for producing a lobed magnetic field having oppositely directed adjacen... | 04/11/1978 |
