CRT with non-circular cone and yoke

Details CRT with non-circular cone and yoke CRT with non-circular cone and yoke

1998-06-19

2000-07-11

Day, Michael H.

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

313477R, 220 21A, H01J 2976

Patent

active

060877677

ABSTRACT:
A funnel (32) of an envelope of a cathode ray tube has a cone portion (40) and a deflection yoke (37) is mounted on the cone portion (40). The deflection yoke (37) includes a hollow magnetic core (44), and horizontal deflection coils (43H) and vertical deflection coils (43V) which are provided on an inner surface side of the core (44). Each of lateral cross-sections of an outer surface of the cone portion (40) and an inner surface of the core (44), perpendicular to a center axis of the funnel (32), has a substantially rectangular shape, and a gap between the lateral cross-sections of the outer surface of the cone portion (40) and the inner surface of the core (44) includes a non-uniform portion.

REFERENCES:
patent: 3731129 (1973-05-01), Tsuneta et al.
patent: 3806750 (1974-04-01), Tsuneta et al.
patent: 5763995 (1998-06-01), Sano et al.
patent: 5801481 (1998-09-01), Yokota
patent: 5962964 (1999-10-01), Sano et al.
Patent abstracts of Japan, vol. 095, No. 005, Jun. 30, 1995, JP 07 037525, Feb. 7, 1995.

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