Support for shadow mask in a cathode ray tube

Details Support for shadow mask in a cathode ray tube Support for shadow mask in a cathode ray tube

1988-12-02

1990-08-21

Yusko, Donald J.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313406, H01J 2907

Patent

active

049509438

ABSTRACT:
A shadow mask mounting in a cathode ray tube includes an evacuated envelope including a funnel section, a cylindrical neck section and a faceplate of generally cup-shaped configuration, including a screen plate and a side wall perpendicular to the screen plate. The shadow mask mounting includes a shadow mask assembly including a rigid support frame and a finely perforated shadow mask mounted across the support frame, a plurality of generally elongated support members distributed around the support frame, stud pins each provided in the faceplate for anchoring one end of each support member to the side wall of the faceplate, and a generally elongated resilient member provided for each of the support members. The resilient member is for applying a biasing force, acting in a direction radially outwardly of the shadow mask, to the respective support member. Each of the support members is secured at one end to the support frame and at the other to the side wall of the faceplate whereas the resilient member has one end secured to the support frame.

REFERENCES:
patent: 3454813 (1969-07-01), Lewinsen
patent: 3803436 (1974-04-01), Morrell
patent: 4300071 (1981-11-01), Dougherty et al.
patent: 4335329 (1982-06-01), Fukuzawa et al.
patent: 4659958 (1987-04-01), D'Amato

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