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:
Oct. 19, 1993
Filed:
Aug. 24, 1990
Applicant:
Inventor:
Thomas Yeh, South Weymouth, MA (US);
Assignee:
Pacific Scientific Company, Weymouth, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H / ;
U.S. Cl.
CPC ...
361 93 ;
Abstract
The disclosed fault indicator which senses current in a cable, resets in response to a minimum current and trips when the current exceeds a predetermined multiple above the average value of the current. A trip circuit senses the average value by periodic current sampling or by continuous current averaging. Maximum and minimum trip setting limit the excursion of the multiple of the average value.