Electric lamp and discharge devices – Cathode ray tube – Shadow mask – support or shield
Patent
1995-12-28
1997-10-21
Horabik, Michael
Electric lamp and discharge devices
Cathode ray tube
Shadow mask, support or shield
313407, H01J 2907
Patent
active
056800045
ABSTRACT:
An improved color picture tube includes an evacuated glass envelope having a rectangular faceplate panel. The panel includes a shadow mask assembly mounted therein. The shadow mask assembly includes a shadow mask formed from a first metal having first coefficient of thermal expansion and a frame formed from a second metal having a second coefficient of thermal expansion. The first coefficient of thermal expansion is substantially lower than the second coefficient of thermal expansion. The improvement comprises the shadow mask being interconnected with the frame by a plurality of bimetallic elements, each of the elements having a first end attached to the frame and a second end attached to the mask. Each bimetallic element is formed of materials that cause a bending of the element an amount related to the thermal expansion of the frame.
REFERENCES:
patent: 3524973 (1970-08-01), Ragdon
patent: 3808493 (1974-04-01), Kawamura et al.
patent: 4638211 (1987-01-01), Fonda
patent: 4678963 (1987-07-01), Fonda
patent: 4707633 (1987-11-01), Hoshi
patent: 5252889 (1993-10-01), Choi
Day Michael
Horabik Michael
Irlbeck Dennis H.
Thomson Consumer Electronics Inc.
Tripoli Joseph S.
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