Cathode assembly of an electron gun for a color cathode ray tube

Details Cathode assembly of an electron gun for a color cathode ray tube Cathode assembly of an electron gun for a color cathode ray tube

1992-12-30

1994-08-23

Yusko, Donald J.

Electric lamp and discharge devices

Cathode ray tube

Ray generating or control

313417, 313457, 313270, 313271, 313456, 445 34, H01J 2946, H01J 194, H01J 1948

Patent

active

053410645

ABSTRACT:
Disclosed is a cathode assembly of an electron gun for a color cathode ray tube in which a heater support structure is improved. The cathode assembly of an electron gun for a color cathode ray tube comprising three cylindrical sleeves which are arranged in an in-line type, a base metal which is located at the upper end of the sleeves, and of which the surfaces are coated with thermal electron emitting material, a heater which is located on the inner portion of each of the sleeves and having two parallel terminals which are exposed out of the sleeves, and a heater fixture block in which three pairs of welding terminals corresponding to the three heaters and two signal lines for forming an electrical circuit along with the welding terminals are provided in the lateral surface and two parallel bead glasses for supporting the sleeves and the block. The heater support structure is simple and the stability thereof is improved. Also, the heater is easily assembled to have a high productivity.

REFERENCES:
patent: 4044278 (1977-08-01), Jariwala
patent: 4151441 (1979-04-01), Puhak
patent: 4185223 (1980-01-01), Anezaki
patent: 4931691 (1990-06-01), Hale
patent: 5021709 (1991-06-01), Oh

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