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. 07, 1986
Filed:
Dec. 21, 1984
Applicant:
Inventor:
Clark L Oster, Cedar Rapids, IA (US);
Assignee:
Square D Company, Palatine, IL (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01H / ; H01H / ; H01H / ; H01H / ;
U.S. Cl.
CPC ...
335 35 ; 335 21 ; 335 23 ; 335 46 ;
Abstract
An improvement to prevent alteration of the circuit breaker calibration due to high overloads. A circuit breaker has a U-shaped current path with a brazed junction at the bend of the 'U'. Upon the occurrence of a large overload, the opposing current in the two legs of the U-shaped path will force the two legs of the 'U' apart, possibly weakening the brazed junction. When one of the legs is a closely calibrated component of a trip assembly, the breaker will no longer operate within the proper range. A stop is placed within the housing to prevent the two legs from moving apart such a distance as will cause the brazed junction to fail.