Electric lamp and discharge devices – With gas or vapor – Having a particular total or partial pressure
Patent
1995-08-18
1997-01-07
O'Shea, Sandra L.
Electric lamp and discharge devices
With gas or vapor
Having a particular total or partial pressure
313490, 313493, 315248, H01J 1720, H01J 6112, H01J 162, H01J 6304
Patent
active
055920489
ABSTRACT:
Electrodeless arc tubes for high pressure sodium discharge lamps comprise a substantially tubular, translucent body formed from a material comprising sintered polycrystalline alumina. The body has an inside diameter and an outside diameter and a given length. A fill comprising sodium and xenon are loaded within the body. At least one end-seal is provided for the body, the end-seal comprising a first alumina disc sealed within the inside diameter by compression, the first disc being spaced inwardly from an end of the body and having a substantially centrally located aperture therein. A second alumina disc seals the aperture, the second disc being bonded to the first disc and to the inner wall of the body by a sealing frit.
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Ingalls Paul H.
Lapatovich Walter P.
Wei George C.
Haynes Mack
McNeill William H.
O'Shea Sandra L.
Osram Sylvania Inc.
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