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. 11, 1977
Filed:
Nov. 13, 1975
Applicant:
Inventor:
Arthur C Westrom, Stone Mountain, GA (US);
Assignee:
Kearney-National, Inc., Atlanta, GA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H / ;
U.S. Cl.
CPC ...
317 15 ; 317 / ; 317 / ; 337 32 ; 337204 ;
Abstract
A current limiting fuse and an oil expulsion or weak link type fuse are connected in series with each other and with a transformer primary winding and a grounded element having a part disposed adjacent one end of the expulsion fuse is arranged so that an arc drawn upon operation of the expulsion fuse is directed to the grounded element in such manner as to cause the current limiting fuse to operate and interrupt the flow of current through the primary winding. The system is applicable to single phase or multiple phase arrangements.