Cathode-ray-tube electrode structure having a particle trap

Details Cathode-ray-tube electrode structure having a particle trap Cathode-ray-tube electrode structure having a particle trap

1985-03-07

1987-05-12

DeMeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Ray generating or control

313240, H01J 2948, H01J 2984

Patent

active

046653406

ABSTRACT:
A very high resolution cathode-ray tube is provided with a combination cylindrical high voltage electrode and particle trap disk that is supported by a multiplicity of spring fingers from the interior wall of the cathode-ray tube neck. One set of the spring fingers contacts the high voltage coating on the interior of the cathode-ray tube envelope. The particle trap portion is provided with an aperture smaller than the adjacent circumferential edge of the lower voltage electron lens electrode in the adjacent electron gun structure, while the higher voltage electron portion is larger in diameter than the lower voltage electrode of the electron gun structure and overlaps the lower voltage electrode. A ring getter device is supported from the higher voltage electrode.

REFERENCES:
patent: 3183388 (1965-05-01), Townsend et al.
patent: 3560779 (1971-02-01), May
patent: 4298821 (1981-11-01), Hendry

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