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:
Jan. 07, 1992
Filed:
Mar. 28, 1990
Hitoshi Sakai, Komaki, JP;
Hitoshi Yoshida, Okazaki, JP;
NGK Insulators, Ltd., Aichi, JP;
Abstract
A jointed structure comprising at least two kinds of oxide superconductor having different melting points, higher melting point superconductor and one lower melting point oxide superconductor being alternately jointed. In this jointed structure, the lower melting oxide superconductor is used as a joint layer for the higher melting oxide superconductors. The jointed structure can be obtained by combining an Y--Ba--Cu--O oxide superconducting material and a Bi--Sr--Ca--Cu--O oxide superconducting material, or by combining two Bi--Sr--Ca--Cu--O oxide superconducting materials of different compositions and accordingly of different melting points. Large cylindrical structures used as, for example, a container for apparatus for biomagnetism measurement can be produced by jointing two or more divided cylindrical parts. In this case, the techique of the jointed structure of the present invention can be applied for jointing of the divided cylindrical parts. The cylindrical structure produced by jointing divided cylindrical parts according to the present invention can prevent the incoming of geomagnetism, thereby enabling reliable measurement of biomagnetism.