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. 02, 1977
Filed:
Jul. 17, 1975
Charles C Sterrett, Pittsburgh, PA (US);
Westinghouse Electric Corporation, Pittsburgh, PA (US);
Abstract
A composite tubular structure for shielding and supporting the superconducting field assembly of the rotor of a dynamoelectric machine. A plurality of elongated hollow metal cylinders are disposed one within another and are metallurgically bonded together by the high energy impact produced by the detonation of an explosive charge. The metallurgical weld produced thereby is formed substantially uniformly across the metal-to-metal interface of next adjacent cylinders. In a preferred embodiment of this invention, the composite tubular structure comprises an outer cylinder formed of a non-ferromagnetic metal having high mechanical strength and ductility, and an inner cylinder formed of a non-ferromagnetic metal having an electrical conductivity which is high as compared with the electrical conductivity of the outer cylinder. When bonded by explosive fabrication, the two cylinders perform mechanically as a single structure, the inner cylindrical portion providing electromagnetic shielding and the outer cylindrical portion providing structural support.