High intensity discharge lamp and electodes for such a lamp

Details High intensity discharge lamp and electodes for such a lamp High intensity discharge lamp and electodes for such a lamp

1985-11-18

1990-01-09

Wieder, Kenneth

Electric lamp and discharge devices

With gas or vapor

Having particular electrode structure

313344, H01J 61073

Patent

active

048930571

ABSTRACT:
An HID lamp incorporates all-metal electrodes providing rapid transition of the arc to the electrode tip. The electrode comprises a length of thoriated tungsten wire having a close wrapped coil between connection and tip ends, so that rapid heating of the electrode tip promotes rapid transition of the arc from coil crevices to the tip.

REFERENCES:
patent: 2007947 (1935-07-01), Braselton
patent: 3937996 (1976-02-01), Cap
patent: 4105908 (1978-08-01), Harding et al.
patent: 4150317 (1979-04-01), Laska et al.
patent: 4340836 (1982-07-01), Bergman et al.

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