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:
Jun. 11, 1985
Filed:
Jan. 03, 1984
John M Anderson, Scotia, NY (US);
General Electric Company, Schenectady, NY (US);
Abstract
A novel electrode structure for a fluorescent lamp, particularly one employing a low discharge gas pressure, comprises a directly heated hollow cathode interiorly coated with an emissive mixture. In accordance with one embodiment of the present invention, a flat metal ribbon is wound to form a helix which is heated resistively. In accordance with another embodiment of the present invention, a flat metal ribbon is wound in a flat spiral configuration and likewise heated resistively. In yet another embodiment of the present invention, a fluorescent lamp electrode comprises a metal cylinder heated directly by a filamentary coil disposed about the circumference of the cylinder and electrically insulated therefrom.