Color picture tube having shadow mask with improved support

Details Color picture tube having shadow mask with improved support Color picture tube having shadow mask with improved support

H - Electricity

01

J

313/35.165

H01J 29/07 (2006.01)

Patent

CA 2029534

An improved color picture tube includes a rectangular faceplate panel having two long sides and two short sides. A rectangular shadow mask is suspended at its four corners by support means within the panel adjacent to a cathodoluminescent screen located on the panel. The tube has three principal axes that are mutually orthogonal to each other. These axes include a longitudinal axis which extends through the center of the tube perpendicularly to the center of the panel, a major axis which passes through the center of the panel paralleling the long sides of the panel, and a minor axis which passes through the center of the panel paralleling the short sides of the panel. Each of the support means has a central support axis. The improvement comprises the two support axes on each side of the minor axis crossing a plane containing the longitudinal and major axes, at a point located between the minor axis and a short side of the panel.

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