Color picture tube having improved temperature compensating supp

Details Color picture tube having improved temperature compensating supp Color picture tube having improved temperature compensating supp

1982-04-29

1984-03-27

Demeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313407, H01J 2907

Patent

active

044397097

ABSTRACT:
An improved color picture tube includes an evacuated envelope enclosing a mask attached to a frame, which is suspended in relation to a cathodoluminescent screen by novel support means. The tube also includes an electron gun for forming a plurality of electron beams and directing the beams through the mask to the screen. The novel support means includes a plurality of studs embedded in the envelope and a plurality of spring assemblies spaced around the frame. Each spring assembly comprises a first spring and a second spring, each spring including a central portion, two flexible portions extending from the ends of the central portion and two end portions extending from the flexible portions. The end portions of the first spring are attached to the end portions of the second spring. The central portion of the first spring is attached to the frame and the central portion of the second spring includes an aperture which is in engagement with one of the studs. The flexible portions of both springs are of rhomboid-shape and offset the central portion of the second spring from the central portion of the first spring in the direction of the longitudinal axis of the tube away from the screen. When the mask and frame expand during tube operation, the flexible portions bend to permit the central portions of the first springs to move toward the central portions of the second springs, thereby moving the mask and frame relative to the screen.

REFERENCES:
patent: 2795718 (1957-06-01), van Hekken et al.
patent: 2795719 (1957-06-01), Morrell
patent: 3370194 (1968-02-01), Schwartz et al.
patent: 3487251 (1969-12-01), Barten et al.
patent: 3492522 (1970-01-01), Pappadis
patent: 3529199 (1970-09-01), Duistermaat et al.
patent: 3803436 (1974-04-01), Morrell
patent: 3832592 (1974-08-01), Yamazaki
patent: 3943399 (1976-03-01), Sedivy

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