Method of manufacturing a color cathode-ray tube

Details Method of manufacturing a color cathode-ray tube Method of manufacturing a color cathode-ray tube

1989-10-25

1991-02-12

Ramsey, Kenneth J.

Electric lamp or space discharge component or device manufacturi

Process

With assembly or disassembly

445 59, 228214, H01J 900

Patent

active

049920677

ABSTRACT:
The invention describes a method of manufacturing a color cathode-ray tube having a color selection electrode attached to a plurality of support studs distributed about and affixed to an interior surface portion of a faceplate panel. The manufacturing steps include: attaching a plurality of support means, each of which includes stud-engaging means, and at least one of the stud-engaging means comprising a washer having a stud-receiving aperture therethrough, to the color selection electrode; positioning the color selection electrode within the faceplate panel with the stud-engaging means positioned on the support studs; and, then, welding the washer to the support means. The method is improved over the prior method, which utilized a mechanical shield for preventing weld-generated debris from contacting the faceplate panel and/or the color selection electrode, by directing a stream of air, during the welding step, between the faceplate panel and the color selection electrode toward the stud having the washer thereon sufficient to direct the weld-generated debris away from the faceplate panel.

REFERENCES:
patent: 3334259 (1967-08-01), Shrader
patent: 3724740 (1973-04-01), Imamura et al.
patent: 4467242 (1984-08-01), Wilbur et al.
patent: 4605379 (1986-08-01), Shahan
patent: 4610636 (1986-09-01), Craig et al.
Products for Productivity, Vortec Product Bulletin, Cincinnati, Ohio.

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