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:
Sep. 28, 1999
Filed:
Jan. 12, 1995
Edward H Nortrup, Stoneham, MA (US);
James C Morris, Wakefield, MA (US);
Osram Sylvania Inc., Danvers, MA (US);
Abstract
An arc tube comprises a light transmissive body containing an arc generating and sustaining medium and has a press seal formed at one end of said body. The press seal comprises a planar portion separating opposed edges. A first foil is sealed in the planar portion. A lead-in conductor is attached to the foil and extends outside of the body and an electrode is also attached to the foil and extends inside the body. A first cavity is formed on a first of the edges and a second cavity is formed on a second of the edges. A fill is provided in each of the cavities for supporting emission of ultraviolet radiation; and a second foil sealed in the planar portion is attached to the first foil, said second foil having a first end terminating in the first cavity and a second end terminating in the second cavity. A ground plane is provided adjacent the cavities. A high voltage pulse applied to the electrodes, and, thus, the foils, creates a capacitive discharge creating the ultraviolet radiation which aids in starting the lamp in which the arc tube is employed.