Shadow mask for a colored image tube and image tube comprising t

Details Shadow mask for a colored image tube and image tube comprising t Shadow mask for a colored image tube and image tube comprising t

1984-11-21

1987-07-07

DeMeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313407, H01J 2907

Patent

active

046789634

ABSTRACT:
In colored image tube having a perforated mask for the selection of colors in order that an electron beam intended for one color only reaches on the screen the luminescent material of that color. This mask presents an edge fixed to a frame through the intermediary of bimetallic strips. This frame is integral with the internal face of the glass wall of the tube adjacent to the screen. The bimetallic strips between the edge of the mask and the frame are flat. When the edge of the mask is inside the frame, one of the ends of each strip is welded to an internal projection of the frame and the other end to the edge of the mask in order to provide a space between the corresponding arm of the frame and the edge.

REFERENCES:
patent: 3524973 (1970-08-01), Rigdon
patent: 3808493 (1974-04-01), Kawamura et al.
patent: 4308485 (1981-12-01), Ignazio
Patents Abstracts of Japan, vol. 6, No. 144, Aug. 3, 1982, p. 1022E122.

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