Color picture tube having a low expansion tension mask attached to a higher expansion frame
AssigneeThomson Licensing
InventorsMark Allen Thomson, Edward Richard Garrity, Jr., James Francis Edwards
Life of this patent
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Abstract
The present invention provides an improvement in a color picture tube having a tension mask supported by a support frame mounted within said tube. The mask has a significantly lower coefficient of thermal expansion than the frame. The frame has two substantially parallel cantilevered members, each member has a distal edge to which the tension mask is attached. At least one of the distal edges has two sections separated by a gap therebetween. The two sections include an inner section and an outer section. The mask is glued to the inner section and is welded to the outer section.
Claims2
A color picture tube comprising a tension mask supported by a support frame mounted within said tube, said mask having a significantly lower coefficient of thermal expansion than said frame,
- said frame having two substantially parallel cantilevered members, each member having a distal edge to which said tension mask is attached, at least one of said distal edges having two sections separated by a gap therebetween, said two sections including an inner section and an outer section, wherein the depth of said gap varies along the length of said distal edges.
A color picture tube comprising a tension mask supported by a support frame mounted within said tube, said mask having a significantly lower coefficient of thermal expansion than said frame,
- said frame having two substantially parallel cantilevered members, each member having a distal edge to which said tension mask is attached,
- at least one of said distal edges having two sections separated by a gap therebetween, said two sections including an inner section and an outer section, and
- said mask being attached to said sections wherein the thickness of said outer section varies along the length of said distal edge.
Dependencies are inferred from the claim text.