Getter device and inner shield for color braun tube

Details Getter device and inner shield for color braun tube Getter device and inner shield for color braun tube

1992-06-26

1995-03-14

Yusko, Donald J.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313407, 313479, 313481, H01J 2980

Patent

active

053979583

ABSTRACT:
Provided is an inner shield for a color braun tube, which enables to improve an inside vacuum state of the color braun tube by readily scattering barium (Ba) into the inner shield disposed in the color braun tube through an opening portion of the inner shield without being attached around an outside of the opening portion when barium is scattered. The inner shield for a color braun tube, has an opening portion through which barium is scattered into an inside of the inner shield disposed in the braun tube when a getter is heated by a high frquency, the opening portion being formed substantially in a shape of a bugle and projected in the getter-positioned direction, whereby barium is easily scattered into the inner shield through the opening portion without being attached around an outside of the opening portion when barium is scattered into the inner shield.

REFERENCES:
patent: 4571521 (1986-02-01), Gallaro et al.
patent: 4622490 (1986-09-01), Benway
patent: 4771214 (1988-09-01), Takenaka et al.

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