Electric lamp or space discharge component or device manufacturi – Process – With assembly or disassembly
Patent
1987-12-31
1989-06-20
Ramsey, Kenneth J.
Electric lamp or space discharge component or device manufacturi
Process
With assembly or disassembly
269254R, 269254D, 24462, 160371, H01J 900
Patent
active
048405965
ABSTRACT:
A reusable factory fixture frame is disclosed for use in the manufacture of a color cathode ray tube having a flat faceplate and a tensed foil shadow mask. The frame provides for mounting an in-process shadow mask during photoexposure of an in-process faceplate in a lighthouse. The frame includes a generally rectangular frame structure having grooves thereabout for receiving an edge of the shadow mask. Spring-loaded mechanical mask-retaining devices are secured to the side of the factory fixture frame for temporarily and removably supporting the in-process shadow mask in tension in the grooves. The shadow mask is heated and allowed to expand prior to being temporarily and removably supported on the frame, and the shadow mask is allowed to cool and shrink in tension while so being supported to effect tensing of the shadow mask in clamped condition on the frame.
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Improvements in the RCA Three-Beam Shadow Mask Color Kinescope, by Grimes et al., The IRE, Jan. 1954; decimal classification R583.6.
Dougherty Lawrence W.
Kraner James L.
Ramsey Kenneth J.
Zenith Electronics Corporation
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