High pressure discharge lamp

Details High pressure discharge lamp High pressure discharge lamp

1991-02-26

1993-09-28

Yusko, Donald J.

Electric lamp and discharge devices

With temperature modifier

Double wall, jacket or casing for envelope

313626, 313639, H01J 6134, H01J 6124

Patent

active

052489132

ABSTRACT:
To prevent ion migration from a discharge vessel (4) into an evacuated sp between the discharge vessel and an outer bulb (1), a shield wire (13) is interposed between the current supply lead (12) extending longitudinally within the outer bulb and the discharge vessel (4), and both the shield wire (13) and the current supply (12) are insulated by a high dielectric insulating material. A suitable material is a ceramic, like Al.sub.2 O.sub.3 or Ba.sub.2 TiO.sub.4, for example, as a single ceramic body with ducts for, respectively, the current supply lead (12) and the shielding wire (13), or, alternatively, to form separate ceramic sleeves (17, 18).

REFERENCES:
patent: 2009221 (1935-07-01), Bruijnes et al.
patent: 3780331 (1973-12-01), Knochel et al.
patent: 4734612 (1988-03-01), Sasaki et al.
patent: 4843266 (1989-06-01), Szanto et al.
patent: 5064395 (1991-11-01), Kling et al.

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