Electric lamp and discharge devices – With gas or vapor – Three or more electrode discharge device
Patent
1982-09-09
1985-06-04
Moore, David K.
Electric lamp and discharge devices
With gas or vapor
Three or more electrode discharge device
313590, H01J 6154
Patent
active
045217165
ABSTRACT:
The invention relates to a high-pressure metal vapor discharge lamp having an ignition auxiliary means (13) externally of the discharge vessel. The external ignition auxiliary means is connected electrically to a first main electrode (5) and in the inoperative condition of the lamp extends along the wall of the discharge vessel up to at most 3 mm beyond one end of a second main electrode (6). According to the invention the external ignition element extends at the level of the first main electrode over at most 3 mm along the first main electrode from the end of the first main electrode. In this manner a regular ignition of the lamp is obtained, variation in the ignition voltage pulse required for ignition being considerably restricted.
REFERENCES:
patent: 4316122 (1982-02-01), Yamazaki et al.
Jacobs Cornelis A. J.
Schellen Johannes A. T.
Van Der Vleuten Anthonius P.
Moore David K.
Smith Robert S.
U.S. Philips Corporation
Wieder K.
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