Electric lamp and discharge devices – With gas or vapor – Envelope with particular structure
Patent
1995-01-12
1999-09-28
Day, Michael
Electric lamp and discharge devices
With gas or vapor
Envelope with particular structure
313631, 313594, 315344, H01J 1730, H01J 1734
Patent
active
059594047
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.
REFERENCES:
patent: 5323091 (1994-06-01), Morris
Patrick H. Garrett, Analog Systems For Microprocessors and Minicomputers, Reston Publishing Co., Inc. "Reliability of Electronic Systems" Chap. 10 pp. 221-233, 1978 (no month).
Morris James C.
Nortrup Edward H.
Day Michael
McNeill William H.
Osram Sylvania Inc.
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