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:
Nov. 11, 1997
Filed:
Oct. 23, 1995
George E Sakoske, Mayfield Heights, OH (US);
Johnson M Kachidza, Cleveland Heights, OH (US);
Richard C Nagle, North Royalton, OH (US);
General Electric Company, Schenectady, NY (US);
Abstract
A low-pressure mercury vapor discharge lamp (10) includes a tubularly-shaped envelope (12) sealed at each end with a stem assembly (14). A fluorescent coating (26) is disposed on the interior surface of the envelope (12) and an electric discharge sustaining fill gas is provided within a hollow interior (24) of the envelope (12). Each stem assembly (14) includes a glass base portion (30) which seals the end of the envelope (12), an electrode (16), and a tubularly-shaped, light-transmissive, glass shield (22). The electrode (16) is disposed within the envelope (12) such that an electric discharge occurs between the electrodes (16) upon operation of the lamp (10). The glass shield (22) extends past the electrode (16) to partially surround the electrode (16) and shield the interior surface of the envelope (12) from material ejected from the electrode (16). The glass shield (22) allows the electric discharge to unaffectedly pass through an open end (42). Structural variations for supporting the glass shield (22) are also disclosed.