Cathode support structure for color picture tube guns to equaliz

Details Cathode support structure for color picture tube guns to equaliz Cathode support structure for color picture tube guns to equaliz

1976-07-02

1977-12-13

Segal, Robert

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313447, 313417, H01J 2902, H01J 2950

Patent

active

040631281

ABSTRACT:
An in-line electron gun assembly for a color television picture tube has a center cathode disposed between two outer cathodes. The cathodes are substantially coplanar and each is supported at a predetermined distance from a control grid by a separate cathode support structure. Each cathode support structure includes a cathode eyelet. The center cathode eyelet is formed of a material having a smaller coefficient of thermal expansion than that of the two outer cathode eyelets so that the variations in carthode-to-grid spacing due to temperature changes during warm-up are kept substantially equal from cathode to cathode.

REFERENCES:
patent: 3732450 (1973-05-01), Mayers
patent: 3873876 (1975-03-01), Yamauchi
patent: 3974416 (1976-08-01), Goot et al.

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