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:
Sep. 12, 1989
Filed:
Oct. 17, 1988
Michel Dorival, Orsay, FR;
Compagnie Industrielle de Tubes et Lampes Electriques Citel, Issy-les-Moulineaux, FR;
Abstract
The lightning arrester device comprises an external metal casing (1) defining an enclosure (2) containing a neutral gas, and at least one metal rod (3a, 3b) forming an electrode and penetrating into the interior of the casing, insulating sealing means (4) being provided between the rod and the casing in order to close said casing, and comprising, moreover, at least one fusible element (5) adapted to create a short circuit between the electrode (3a, 3b) and the casing (1) when the quantity of energy to be diverted by the lightning arrester device exceeds a specified threshold. On its external wall, near one of its ends receiving an electrode (3a, 3b), the metal casing (1) comprises a housing (L), the fusible element (5) being disposed in said housing, and a strip (9) of insulating material surrounds said fusible element and the housing, said strip (9) comprising holes (10) and being itself surrounded by a conductive metal ring (11) electrically connected to the electrode, the whole unit being such that when there is a rise in temperature in the casing, the fusible element (5) begins to melt and flows through at least one hole (10) in the insulating strip to create a short circuit electrical contact between the casing (1) and the metal ring (11) connected to the electrode.