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:
May. 07, 2013
Filed:
Sep. 08, 2008
Applicants:
Robert T. Elms, Monroeville, PA (US);
William J. Murphy, Cranberry Township, PA (US);
Inventors:
Robert T. Elms, Monroeville, PA (US);
William J. Murphy, Cranberry Township, PA (US);
Assignee:
Eaton Corporation, Cleveland, OH (US);
Primary Examiner:
Int. Cl.
CPC ...
G08B 21/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A circuit breaker includes separable contacts, an operating mechanism structured to open and close the separable contacts, and a trip circuit including a trip coil and a fault detector. The fault detector energizes the trip coil to cause the operating mechanism to open the separable contacts. A test circuit is structured to test the trip coil and determine an open circuit condition thereof. An annunciation circuit is structured to annunciate the open circuit condition of the trip coil.