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:
May. 18, 1993
Filed:
Nov. 12, 1991
Hitoshi Shimizu, Ichihara, JP;
Katsuro Oishi, Yokohama, JP;
Yasuzo Tanaka, Yokohama, JP;
Syuiti Sato, Kimitsu, JP;
Shinnichi Yatabe, Kimitsu, JP;
Osami Tsukamoto, Yokohama, JP;
The Furukawa Electric Co., Ltd., Tokyo, JP;
Nippon Steel Corporation, Tokyo, JP;
Abstract
A primary coil assembly for a superconducting linear induction motor is provided which is arranged opposite to a secondary conductor for exerting a relative thrust on the secondary conductor when energized. The primary coil assembly comprises a plurality of coil units, each including a nonmagnetic and nonconductive bobbin, an alternating-current superconducting wire wound around the bobbin, and nonmagnetic and nonconductive spacers interposed between adjacent turns of the superconducting wire being adjacent to each other in an outward direction with respect to the axis of the bobbin or adjacent to each other in the width direction of the bobbin, for providing a clearance therebetween. The coil units have substantially identical structure and shape and are spaced at a predetermined distance from each other.