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. 11, 1992
Filed:
Apr. 02, 1991
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 / ; H05B / ; H05B / ;
U.S. Cl.
CPC ...
315 73 ; 315 59 ; 315240 ; 315290 ; 315243 ;
Abstract
A high-pressure metal vapor discharge lamp comprises: an arc tube, which is shunted by a series circuit of a thermal switch and a nonlinear ceramic capacitor, a pyroelectric current bypassing resistor connected in parallel to the nonlinear ceramic capacitor, and a lamp outer bulb incorporating the arc tube, the thermal switch, the nonlinear ceramic capacitor and the resistor. Because of this construction, the nonlinear ceramic capacitor is prevented from early deterioration, thus lengthening the service life of the discharge lamp.