Electrode with overwind for miniature metal vapor lamp

Details Electrode with overwind for miniature metal vapor lamp Electrode with overwind for miniature metal vapor lamp

1978-12-29

1981-06-23

Segal, Robert

Electric lamp and discharge devices

With support and/or spacing structure for electrode and/or...

For plural electrodes of discharge device

313331, H01J 1706, H01J 6106

Patent

active

042753295

ABSTRACT:
An electrode for a miniature high pressure metal vapor lamp comprises a slender tungsten shank joined to a molybdenum inlead by a weld knot. The shank diameter is chosen above the size where melt-back starts at the intended lamp current and is provided wth a fine wire overwind fitting loosely thereon and retained in place by frictional engagement with the weld knot. The overwind reduces breakdown voltage and assures rapid glow-to-arc transition.

REFERENCES:
patent: 2177703 (1939-10-01), Francis
patent: 2241362 (1941-05-01), Gustin et al.
patent: 2473969 (1949-06-01), Pryslak et al.
patent: 2497496 (1950-02-01), Gooskens et al.
patent: 2765420 (1956-10-01), Martt
patent: 3168668 (1965-02-01), Rexer
patent: 3448321 (1969-06-01), Shanks
patent: 3448322 (1969-06-01), Millikan et al.
patent: 3710169 (1973-01-01), T'Jampens et al.
patent: 3992642 (1976-11-01), McVey et al.
patent: 4101799 (1978-07-01), Wiedijk et al.

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