One piece astigmatic grid for color picture tube electron gun

Details One piece astigmatic grid for color picture tube electron gun One piece astigmatic grid for color picture tube electron gun

1979-11-15

1981-02-17

Chatmon, Jr., Saxfield

Electric lamp and discharge devices

Electrode and shield structures

Foraminous electrodes or shields

313414, 313447, 313458, 29 2514, 29 2517, H01J 146, H01J 1704, H01J 1938, H01J 1940

Patent

active

042517478

ABSTRACT:
A one-piece control grid for functioning as an astigmatic lens in an electron gun has a milled, ground, or machined slot formed across its functional grid area. A suitable beam aperture is provided in the bottom of the slot.

REFERENCES:
patent: 2125418 (1938-08-01), Benjamin et al.
patent: 2712087 (1955-06-01), Fite et al.
patent: 2937314 (1960-05-01), Fyler
patent: 3005123 (1961-10-01), Griffiths
patent: 3852608 (1974-12-01), Johanns et al.
patent: 3919583 (1975-11-01), Hasker et al.
patent: 4104554 (1978-08-01), Kolbeck et al.

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