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:
Apr. 14, 1981
Filed:
Jan. 22, 1979
Applicant:
Inventors:
Walter T Brumfield, Jr, Nicholasville, KY (US);
Norman M Newsome, Lexington, KY (US);
Harris I Stanback, Lexington, KY (US);
Assignee:
Square D Company, Palatine, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E05B / ; E05B / ; E05C / ; H02B / ;
U.S. Cl.
CPC ...
70 84 ; 49141 ; 49394 ; 70 93 ; 70 94 ; 70489 ; 174 66 ; 200306 ; 292-5 ; 292-8 ; 292 56 ; 292 99 ; 292338 ; 29234117 ; 292D / ;
Abstract
A retainer plate is pivotally mounted on a panelboard cabinet door lock housing, which carries a latch for locking the door. A detent on the plate engages in a rabbet opening to enable limited opening movement of the door in response to the pressure developed by arc gases generated by fault currents passing through a tripped circuit breaker in the panelboard cabinet. For ordinary opening movement, the lock latch is manually operated to pivot the retainer plate and disengage the detent from the rabbet opening.