High-pressure discharge lamp with torsionally wound electrode st

Details High-pressure discharge lamp with torsionally wound electrode st High-pressure discharge lamp with torsionally wound electrode st

1986-07-11

1989-07-11

Boudreau, Leo H.

Electric lamp and discharge devices

With gas or vapor

Having electrode heated by space discharge current

313631, 313344, 445 46, 445 51, 140 715, H01J 6106, H01J 61073

Patent

active

048475343

ABSTRACT:
The high-pressure gas discharge lamp according to the invention has electrodes comprising a rod of mainly tungsten and a helical winding of mainly tungsten near the tip of the rod. The winding has a first layer of turns, which is integral with a second layer of turns. The turns of the second layer are wound with torsion in the wire and surround turns of the first layer which are also wound with torsion. The direction of the torsion in a turn is equal to the direction in which the turn extends around the rod. As a result, the turns with torsion surround with tight fit their substrate and the winding is securely fixed ot the electrode rod.

REFERENCES:
patent: 3132409 (1964-05-01), Freeman
patent: 3170081 (1965-02-01), Rokosz
patent: 4150317 (1979-04-01), Laska et al.
patent: 4319158 (1982-03-01), Watanabe et al.
patent: 4559473 (1985-12-01), McVey

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