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. 30, 1995
Filed:
Apr. 07, 1993
Applicant:
Inventors:
Takenobu Iida, Saitama, JP;
Shunichi Sasaki, Saitama, JP;
Assignee:
Iwasaki Electric Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
315 73 ; 315 46 ; 315309 ; 315240 ;
Abstract
A built-in igniter type high pressure sodium lamp includes an igniter connected in parallel with an arc tube 1 for a high pressure sodium lamp and composed of a series circuit of a thermally-activated bimetal switch 2 and a nonlinear capacitor 3. The high pressure sodium lamp is so constructed that a heating resistor 11 which can heat the nonlinear capacitor 3 to the Curie point temperature when the igniter operates is connected in parallel with and located close to the nonlinear capacitor 3.