High intensity discharge lamp alkali metal loss reduction means

Details High intensity discharge lamp alkali metal loss reduction means High intensity discharge lamp alkali metal loss reduction means

1984-05-07

1986-09-30

Moore, David K.

Electric lamp and discharge devices

With temperature modifier

Double wall, jacket or casing for envelope

313634, H01J 102

Patent

active

046148906

ABSTRACT:
A high intensity discharge lamp includes a hermetically sealed outer envelope having an arc tube therein containing a fill gas which includes sodium and having a wall member with a portion of increased thickness wherein the portion of increased thickness of the wall member of the arc tube is positioned adjacent to a metal conductor disposed within the outer envelope whereby loss of sodium from the arc tube is inhibited.

REFERENCES:
patent: 3250934 (1966-05-01), Peterson
patent: 3384775 (1968-05-01), Ishler et al.
patent: 3610983 (1971-10-01), Grabner et al.
patent: 4499396 (1985-02-01), Fohl et al.

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