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:
Feb. 18, 1992
Filed:
Feb. 07, 1990
Applicant:
Inventors:
Edmond Thuries, Meyzieu, FR;
Jean -Pierre Dupraz, Lyons, FR;
Jean-Paul Moncorge, Vaux en Velin, FR;
Jean-Marc Willieme, La Mulatiere, FR;
Joseph Martin, Meyzieu, FR;
Yves Perrusset, Vaulx en Velin, FR;
Didier Taponat, Villeurbanne, FR;
Assignee:
GEC Alsthom SA, Paris, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01H / ;
U.S. Cl.
CPC ...
361174 ; 361-1 ; 361117 ; 361175 ; 2001 / ;
Abstract
A safety device for an electrical apparatus comprising an enclosure filled with gas under pressure, the safety device comprising first means for detecting the appearance of an arc inside the enclosure, and second means controlled by the first means to establish a path for the gas through the enclosure when the first means has detected an arc for a given length of time.