Electric lamp or space discharge component or device manufacturi – Process – With assembly or disassembly
Patent
1987-12-31
1990-01-16
Ramsey, Kenneth J.
Electric lamp or space discharge component or device manufacturi
Process
With assembly or disassembly
24462, 160371, 3810291, 445 37, H01J 9227
Patent
active
048940372
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. At least one elongatge rod-like member extending lengthwise of and complementarily mating with the grooves temporarily and removably support an in-process shadow mask in tension. 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.
REFERENCES:
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patent: 2625734 (1953-01-01), Law
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patent: 3553862 (1971-01-01), Hamu
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patent: 4790786 (1988-12-01), Stauss
Improvements in the RCA Three-Beam Shadow Mask Color Kinescope, by Grimes et al., The IRE, Jan. 1954; decimal classification R583.6.
Fendley James R.
Jarosz John M.
Ramsey Kenneth J.
Zenith Electronics Corporation
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