Metal-halide lamp with specific lead through structure

Details Metal-halide lamp with specific lead through structure Metal-halide lamp with specific lead through structure

1998-06-22

2000-06-13

Patel, Nimeshkumar D.

Electric lamp and discharge devices

Electrode and shield structures

With lead wire or connector

313326, 313331, 313623, H01J 550, H01J 546

Patent

active

060753145

ABSTRACT:
The discharge vessel has two ends (6), which are closed off by ceramic pl which each contain an elongate capillary tube (12), an electrically conductive lead-through (9, 10) comprising two parts (13, 14) being guided in a vacuum-tight manner through this plug capillary tube (12). The inner part (14) is a pin made of a halide-resistant metal (tungsten), the diameter of which is at most 0.4 mm and which is surrounded by a tubular casing (20, 21) made of ceramic material which consists of a concentric aluminum oxide tube (sleeve), the outer part (13), over its entire length, and the inner part (14), at least over a length of 1 mm from the beginning of the sleeve (20, 21), being sealed off by means of soldering glass (18).

REFERENCES:
patent: 4780646 (1988-10-01), Lange et al.
patent: 4864191 (1989-09-01), Van De Weijer et al.
patent: 5363007 (1994-11-01), Fromm et al.
patent: 5424609 (1995-06-01), Geven et al.
patent: 5430353 (1995-07-01), Feldman et al.
patent: 5552670 (1996-09-01), Heider et al.

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