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:
May. 16, 1978
Filed:
Apr. 15, 1976
Applicant:
Inventor:
Ronald C Koo, Upper Montclair, NJ (US);
Assignee:
Duro-Test Corporation, North Bergen, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ; H05B / ;
U.S. Cl.
CPC ...
315 74 ; 313 25 ;
Abstract
A high intensity discharge lamp in which the arc tube is located within an outer envelope. A multi-filament assembly is located within the outer envelope in series with the current supply to the arc tube. When the lamp outer envelope is broken, the filaments will burn out in the presence of air, open the current supply to the arc tube and extinguish the arc. The use of multi-filaments permits better control of the filament burn out time.