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. 21, 1981
Filed:
Jul. 19, 1979
Applicant:
Inventors:
Jacques Lewiner, 92210 Saint-Cloud, FR;
Gerard Dreyfus, Villebon sur Yvette, 91120 Palaiseau, FR;
Didier Perino, 92150 Suresnes, FR;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08B / ;
U.S. Cl.
CPC ...
340638 ; 340652 ;
Abstract
The device comprises means for applying a DC voltage U as a function of the voltage taken from the terminals of a fuse between a fixed electrode and a movable electrode forming together a capacitor. The movable electrode is urged towards the fixed electrode by an electret fast to the latter and in the opposite direction by a magnet and by the voltage U. As soon as this voltage exceeds a threshold corresponding to the rupture of the fuse, the movable electrode swings over and closes a switch for warning purposes.