Shadow mask for color cathode ray tube

Details Shadow mask for color cathode ray tube Shadow mask for color cathode ray tube

1979-03-19

1982-04-27

Demeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

H01J 2907

Patent

active

043273076

ABSTRACT:
A shadow mask for color cathode ray tubes has increased resistance to doming caused by heat generated within the tube during operation.
A plurality of spaced protuberances formed on the mask frame provide the welding locations for the mask itself and thus provide a space between the frame wall and the mask wall. This reduces the stresses normally introduced into the mask when it is welded to the frame and reduces the tendency to dome during heating.

REFERENCES:
patent: 3479546 (1969-11-01), Mears
patent: 3585431 (1971-06-01), Long
patent: 3772555 (1973-11-01), McKee et al.
patent: 3808493 (1974-04-01), Kawamura et al.

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