Flicker-suppressed, low-power, high-pressure discharge lamp

Details Flicker-suppressed, low-power, high-pressure discharge lamp Flicker-suppressed, low-power, high-pressure discharge lamp

1993-01-21

1996-04-23

O'Shea, Sandra L.

Electric lamp and discharge devices

With gas or vapor

Having particular electrode structure

313344, 313574, 313628, 313632, H01J 1704, H01J 6104

Patent

active

055106757

ABSTRACT:
To reduce flicker in low-power, high-pressure discharge lamps, the electrs, in the region in which they face each other, have wrap windings, of about 2 to 4 turns wrapped thereabout and the terminal end of the electrode has an essentially spherical end head element (19, 19', 39) melted thereon, which essentially spherical head element may be a segment of a sphere, ellipsoid-shaped or similarly formed. The electrode shaft, the wrap winding and the sphere preferably are all made of undoped tungsten, although the electrode shaft may be of a lower melting metal, such as rhenium.

REFERENCES:
patent: 2687489 (1954-08-01), Anderson et al.
patent: 3067357 (1962-12-01), Fridrich
patent: 3170081 (1965-02-01), Rokosz
patent: 3778664 (1973-12-01), Petro et al.
patent: 4275329 (1981-06-01), Fridrich et al.
patent: 4340836 (1982-07-01), Bergman et al.
patent: 4528478 (1985-07-01), Rothwell, Jr. et al.
patent: 4766348 (1988-08-01), English et al.
patent: 4851735 (1989-07-01), Gosslar et al.
patent: 5004951 (1991-03-01), Honda et al.

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