Electric lamp and discharge devices – With gas or vapor – Mean free-path spacing of envelope portions or content parts
Patent
1995-04-07
1998-05-12
Patel, Ashok
Electric lamp and discharge devices
With gas or vapor
Mean free-path spacing of envelope portions or content parts
313620, 313634, H01J 1700, H01J 6100, H01J 6104, H01J 1704
Patent
active
057511110
ABSTRACT:
The invention relates to a high-pressure metal halide lamp provided with a discharge vessel with a ceramic wall enclosing a discharge space. The vessel has a cylindrical portion of internal diameter ID which is closed off at either end by end wall portions which form end faces of the discharge space. At least two electrodes are arranged in the discharge vessel, whose respective tips have an interspacing EA such that ##EQU1## The electrodes have lead-throughs which are enclosed in ceramic closing plugs and are connected thereto in a gastight manner by means of ceramic glazing joints.
According to the invention, the rated lamp power is at most 100 W, and an electrode tip lies substantially in the adjacent end face. A closing plug is fastened in the relevant end wall portion in a gastight manner at a distance from the end face.
REFERENCES:
patent: 2207133 (1940-07-01), Scott et al.
patent: 4924146 (1990-05-01), Meeuwssen
patent: 5097176 (1992-03-01), De Hair
patent: 5424609 (1995-06-01), Geven
Peeraer Jan M.
Stoffels Jan A.J.
Vandeperre Denise K.L.
Egbert Walter M.
Haynes Mack
Patel Ashok
U.S. Philips Corporation
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