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:
Aug. 16, 1988
Filed:
Dec. 17, 1987
Applicant:
Inventors:
Robert P Alley, Clifton Park, NY (US);
Fred G Turnbull, Scotia, NY (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01F / ;
U.S. Cl.
CPC ...
336131 ; 336134 ; 336175 ;
Abstract
A static trip overload relay includes a plurality of phase current sensing transformers having two-piece cores. One core piece of each transformer core is positionally mounted by the relay housing, while the other piece is positionally mounted by a carrying case movably mounted within the housing. By varying the case position within the housing, the air gaps between the two core pieces of each transformer core are correspondingly and concurrently varied pursuant to calibrating the relay to operate at any one of a range of circuit current ratings.