Envelope for small high-intensity-discharge electrodeless arc la

Details Envelope for small high-intensity-discharge electrodeless arc la Envelope for small high-intensity-discharge electrodeless arc la

1987-12-28

1989-02-07

DeMeo, Palmer C.

Electric lamp and discharge devices

With gas or vapor

Envelope with particular structure

315248, H01J 6133, H05B 4124

Patent

active

048034045

ABSTRACT:
An envelope, containing a torus-shaped arc of a high-intensity-discharge electrodeless arc lamp has a shape, in a vertical plane, with a sidewall formed of a truncated conical portion, with apex located in a downward position with respect to the cone portion utilized. The upper and lower enclosing surfaces are of convex form and are smoothly joined to the truncated conical side wall of the envelope. In one presently preferred embodiment, the sidewall has a dual truncated conical form, with each truncated cone section having an apex located outside of the arc envelope and with the larger diameter section ends joined together, to allow the lamp to operate either with a base-down or a base-up disposition.

REFERENCES:
patent: 3319119 (1967-05-01), Rendina
patent: 4070603 (1978-01-01), Regan et al.
patent: 4480213 (1984-10-01), Lapatovich et al.
patent: 4636687 (1987-01-01), Keeffe et al.
patent: 4705987 (1987-11-01), Johnson

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