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. 25, 1983
Filed:
Jan. 04, 1980
Applicant:
Inventors:
Fumio Andow, Hachioji, JP;
Norio Fujisawa, Fuchu, JP;
Assignee:
Tokyo Shibaura Denki Kabushiki Kaisha, Kanagawa, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
307353 ; 307 82 ; 307360 ; 328151 ;
Abstract
A relay device is disclosed which protects and controls an electric power line by detecting an electrical quantity carried by the electric power line. The relay device includes a rectifying circuit connected to the electric power line. The output of the rectifying circuit is supplied to a peak value holding circuit which stores the peak value of the output of the rectifying device during each predetermined period under control of a resetting pulse. The output of the peak value holding circuit is supplied to a detecting circuit having a predetermined threshold level.