Ceramic electric-discharge lamp incorporating arc tube having at

Details Ceramic electric-discharge lamp incorporating arc tube having at Ceramic electric-discharge lamp incorporating arc tube having at

1990-08-30

1993-01-26

Yusko, Donald J.

Electric lamp and discharge devices

With temperature modifier

Double wall, jacket or casing for envelope

313 17, 313573, 313642, 313312, H01J 6133, H01J 6134

Patent

active

051824868

ABSTRACT:
The invention provides a ceramic electric-discharge lamp having a pinch-sealer which is set to an end of an outer envelope and covered by a base having a pair of base pins projecting themselves into the base. The outer envelope is in vacuum, in which an arc tube composed of a square U-shaped tube is installed. Apertures of both ends of the square U-shaped illuminant are closed by ceramic discs each containing an electrode. Linear illuminant is formed in such regions where the radius of curvature of the square U-shaped arc tube greatly varies, in other words, between the curved portions.

REFERENCES:
patent: 2228327 (1941-01-01), Spanner
patent: 4481442 (1984-11-01), Albrecht et al.
patent: 4977349 (1990-12-01), Asakura et al.
J. H. Ingold and D. M. Rutan, "Around the Bend in the Biaxial Fluorescent Lamp", Journal of the Illuminating Engineering Society, vol. 17, No. 2, pp. 29-38, Jun. 1988.

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