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:
Dec. 22, 1992
Filed:
Dec. 13, 1990
Norio Fujimaki, Atsugi, JP;
Kohtaroh Gotoh, Tokyo, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An apparatus for eliminating a magnetic flux from a superconducting circuit comprises a substrate on which a superconducting circuit is formed, a heating fixture including resistance heating elements and provided in the vicinity of the superconducting circuit, a driving unit connected to the heating fixture for energizing the same by supplying a drive current to each resistance heating elements in the heating fixture. The heating fixture is so configured that, upon energization of the resistance heating elements in the heating fixture, there is formed a region of normal conduction state characterized by a temperature that exceeds the critical temperature of the normal conduction-superconduction transition, in at least a part of the superconducting circuit, and such that the heating fixture produces a minimized magnetic field upon the energization of the resistance heating elements. The driving unit controls energization of the heating fixture such that the region of normal conduction state moves consecutively and continuously to a periphery of the superconducting circuit.