Electric lamp and discharge devices – With gas or vapor – Having particular electrode structure
Reexamination Certificate
2007-03-06
2007-03-06
Guharay, Karabi (Department: 2879)
Electric lamp and discharge devices
With gas or vapor
Having particular electrode structure
C313S574000, C313S621000
Reexamination Certificate
active
10480420
ABSTRACT:
High pressure vapor discharge lamp provided with a discharge vessel. The discharge vessel encloses a discharge space provided with a filling of mercury and a rare gas, for example, in a gastight manner. An electrode is arranged in the discharge space for generating and maintaining a discharge therein, while the electrode comprises a rod electrode having an enlarged head at its end which projects into the discharge space. According to the invention, the enlarged head comprises a preformed electrode projection having an at least substantially conical shape.
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Canning Anthony
Guharay Karabi
Koninklijke Philips Electronics , N.V.
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