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:
Apr. 21, 1992
Filed:
Sep. 24, 1990
Applicant:
Inventors:
Hitoshi Yamamoto, Tokyo, JP;
Sadahiro Yanai, Tokyo, JP;
Assignee:
Minipilo Electric Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B / ; H01J / ;
U.S. Cl.
CPC ...
3152 / ; 315 71 ; 315 94 ; 315101 ; 315D / ; 315330 ; 315335 ; 313631 ; 313632 ;
Abstract
A charging method within a glass tube using a direct current of low voltage is provided in order to obtain a small fluorescent lamp with a light emission of high luminance. Two distinct discharges are achieved through use of one negative electrode. The filament-like negative electrode is arranged at a short spaced relation to a positive electrode at one end of the glass tube and upon application of the direct current voltage becomes the preliminary discharge. A second positive electrode is positioned at the opposite end of the glass tube and has a greater-spaced relation to the negative electrode resulting in the second discharge.