The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 18, 1987
Filed:
Oct. 31, 1985
Masami Urata, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A superconducting coil device in accordance with the present invention includes a cryostat formed by accommodating liquid helium, a superconducting coil which is accommodated in the cryostat along with liquid helium, a persistent current switch for short-circuiting the ends of the superconducting coil, and a thyristor connected to both ends of the persistent current switch. The gate electrode of the thyristor and the intermediate tap of the superconducting coil are connected via a resistor and/or diode. To both ends of the persistent current switch there are connected each of one end of leads that are formed by superconducting wire, and on the other ends of lead wires there are provided terminals. In addition, in the exterios of the cryostat there is provided a power supply for charging and discharging the superconducting coil by being connected selectively to that terminals.