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:
Jul. 07, 1981
Filed:
Jul. 02, 1979
Applicant:
Inventors:
William M Keeffe, Rockport, MA (US);
Frederic Koury, Bristol, MA (US);
W Calvin Gungle, Danvers, MA (US);
Assignee:
GTE Products Corporation, Stamford, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
313217 ; 313211 ; 313344 ;
Abstract
An electrode for a metal halide arc discharge lamp comprises a coiled coil on a tungsten rod, the rod diameter being equal to W.sup.0.56 /0.784 mils, where W is the input power to the lamp in watts. The primary wire for the coiled coil equals D.sup.1.8 /80.8, where D is the rod diameter in mils, and is equal to half the diameter of the mandrel wire of the coiled coil.