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:
Jun. 21, 1977
Filed:
Jul. 03, 1974
Hideo Fujiwara, Tachikawa, JA;
Yukio Ichinose, Kokubunji, JA;
Satoshi Taniguchi, Tokorozawa, JA;
Tsutomu Kobayashi, Tokyo, JA;
Kazuo Ichino, Tokyo, JA;
Michiyasu Itoh, Kodaira, JA;
Yasutaro Uesaka, Hachioji, JA;
Fumiyuki Inose, Kokubunji, JA;
Sadayasu Ueno, Katsuta, JA;
Hitachi, Ltd., , JA;
Abstract
A variable inductor wherein two closed magnetic circuits each having a predetermined gap in one place are constructed of a movable magnetic core and a fixed magnetic core. When the movable magnetic core is moved, the opposite area between both the magnetic cores in one of the closed magnetic circuits increases, while the opposite area between both the magnetic cores in the other closed magnetic circuit decreases. Thus, the inductances of coils wound around parts of the respective closed magnetic circuits vary complementarily.