Ceramic arc tube for metal vapor discharge lamps

Details Ceramic arc tube for metal vapor discharge lamps Ceramic arc tube for metal vapor discharge lamps

1982-10-25

1985-03-05

Demeo, Palmer

Electric lamp and discharge devices

With gas or vapor

Envelope with particular structure

313636, H01J 6133

Patent

active

045033560

ABSTRACT:
The disclosed ceramic arc tube of metal vapor discharge lamps has an arc discharge portion with electrode-holding end portions integrally formed at opposite ends thereof. The outside diameter of the arc discharge portion is larger than that of the electrode-holding end portions. The ceramic arc tube is made by placing a tubular green body in a fusiform cavity of a die, inflating the middle portion of the green body more than end portions thereof, and firing the thus shaped green body.

REFERENCES:
patent: 2896107 (1959-07-01), Anderson, Jr.
patent: 3363134 (1968-01-01), Johnson
patent: 3498714 (1970-03-01), Elmer
patent: 3832590 (1974-08-01), Yamazaki et al.
patent: 3885181 (1975-05-01), Nelson et al.
patent: 3932782 (1976-01-01), Kopelman
patent: 4065691 (1977-12-01), McVey

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