Color picture tube with shadow mask support assembly

Details Color picture tube with shadow mask support assembly Color picture tube with shadow mask support assembly

1988-03-02

1989-12-12

DeMeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313407, H01J 2907

Patent

active

048869970

ABSTRACT:
A color picture tube of this invention has a CRT envelope having a substantially rectangular front panel, a phosphor screen formed on an inner surface of the front panel, a shadow mask which is detachably mounted on the panel adjacent to the phosphor screen by a supporting assembly, and a frame surrounding the shadow mask. The supporting assembly has a plurality of stud pins which project from the four corners of the front panel and leaf springs which are fixed at one end to a corresponding corner of the frame are detachably engaged at the other end with a corresponding stud pin. Each leaf spring has an elastically deformable portion between one end portion fixed to the frame and the other end portion engaged with the corresponding one of the stud pins. Angle .beta., defined by the axis of the elastically deformable portion a central line axis of the CRT envelope, and angle .alpha., defined by a line connecting an end portion of the elastically deformable portion on the side of the frame and the stud pin and the central line axis of the CRT envelope, have the following relation: .beta.<.alpha.

REFERENCES:
patent: 3487251 (1969-12-01), Barten et al.
patent: 3492522 (1970-01-01), Pappadis
patent: 4728853 (1988-03-01), Sone et al.
Patent Abstracts of Japan dated Mar. 24, 1987, vol. 11, No. 92, (E-491) (2539).

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