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:
Aug. 17, 1976
Filed:
Mar. 12, 1975
Pierre Merenda, Paris, FR;
Jean Claude Reymond, Paris, FR;
Thomson-CSF, Paris, FR;
Abstract
A lamp for installation in the flashers or winkers of motor vehicles, with a flasher device integrated into the lamp itself, is provided. The flashing is produced, in the case of the invention, by the utilization of substances which exhibit a sudden change in resistivity at a certain temperature. This is the case with powdered V O.sub.2 when formed into an aglomerate by the use of an organic binder. A block assembled in the bulb of the lamp and in electrical parallel with the filament, does not effect the incandescent state of the latter as long as a temperature of 68.degree. C is not exceeded, but effectively short-circuits the filament beyond this temperature. In this fashion, successive extinctions and relightings take place by a process of relaxation. In the case of a C.sub.36 H.sub.74 wax filled with conductive powder, the phenomena are reversed and the block must be connected in series with the filament.