Electrical discharge lamp with ultraviolet filtering globe havin

Details Electrical discharge lamp with ultraviolet filtering globe havin Electrical discharge lamp with ultraviolet filtering globe havin

1995-11-30

1998-05-26

Patel, Ashok

Electric lamp and discharge devices

With temperature modifier

Double wall, jacket or casing for envelope

31331801, 31331809, 3133181, H01J 548

Patent

active

057571104

ABSTRACT:
An electrical discharge lamp device in which an ultraviolet filtering globe tightly encloses a sealed glass bulb of an arc tube containing a pair of oppositely disposed electrodes to thereby form a unitary body. The rear end part of the arc tube extending from the ultraviolet filtering globe is supported by an insulating base, and the forward end part of the arc tube is supported by a lead support extending forward from the insulating base. An extending part is formed on the front face of a base main body made of synthetic resin, and the rear part of the ultraviolet filtering globe is supported by the tubular extending part. In this construction, stress is not concentrated on the portion of the arc tube supported by the base main body of the arc tube, and hence the durability of the arc tube is improved.

REFERENCES:
patent: 3855495 (1974-12-01), Pappas et al.
patent: 4785218 (1988-11-01), Kohl et al.
patent: 5253153 (1993-10-01), Mathews et al.
patent: 5386173 (1995-01-01), Kosmatka
patent: 5536998 (1996-07-01), Sica
patent: 5627428 (1997-05-01), Helbig et al.
Patent Abstracts of Japan, E-1387 of Jun. 24, 1993, vol. 17, No. 334.

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