Deflection yoke and CRT device

Details Deflection yoke and CRT device Deflection yoke and CRT device

2005-01-04

2005-01-04

Patel, Vip (Department: 2879)

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

C313S439000

Reexamination Certificate

active

06838811

ABSTRACT:
The invention provides a deflection yoke comprising: a funnel-shaped core (ii) being made of a magnetic material, (iii) having, on its inner wall, ridges each of which starts from the narrower end and extends toward the wider end for a part of the length of the core, the ridges being arranged circumferentially at intervals and thereby forming core slots, and (iv) in which the remaining inner wall near the wider end is smooth; a first deflection coil wound as partially guided by the core slots; second deflection coil positioned more inward than the first deflection coil; and an insulating frame that (i) is sandwiched between the first and second deflection coils, and (ii) has, in an area corresponding to the core's smooth area, guiding slots extending along the CRT axis direction and being arranged circumferentially, wherein the second deflection coil is wound as partially guided by the guiding slots.

REFERENCES:
patent: 61-56757 (1984-09-01), None
patent: 7-35289 (1986-03-01), None

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