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:
Apr. 23, 1985
Filed:
Aug. 29, 1983
Applicant:
Inventors:
Yoshihisa Ishigami, Kadoma, JP;
Yasumasa Hashimota, Kadoma, JP;
Tadaharu Kitado, Kadoma, JP;
Hiromi Nishimura, Kadoma, JP;
Tetsuo Mori, Kadoma, JP;
Assignee:
Matsushita Electric Works, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H / ;
U.S. Cl.
CPC ...
361 45 ; 361 42 ; 361 87 ;
Abstract
A current detecting device includes high frequency oscillation detecting circuits which, when a saturable reactor oscillates at a high frequency, detect the high frequency oscillation of the reactor and generate a high level output. Thus, when a large current flows through the reactor and the magnetization characteristic of the reactor is varied to generate a normal detection output, the reactor oscillation due to the large current is detected and an operating circuit for driving an external device is energized.