Electric lamp and discharge devices – Cathode ray tube – Envelope
Patent
1988-08-22
1989-08-08
DeMeo, Palmer C.
Electric lamp and discharge devices
Cathode ray tube
Envelope
313422, 313495, 220 23A, H01J 2986
Patent
active
048556408
ABSTRACT:
A cathode ray tube has an envelope comprising a flat glass faceplate covering an opening defined by a side wall of a metal rear housing and sealingly mounted on a flange provided on the side wall. To increase its flexibility and enable the flange surface adequately to conform with the faceplate edge and accommodate deflections thereof upon, for example, evacuation of the envelope, particularly when a glass frit seal is used, the flange is formed so that it extends from the side wall in one direction, either inwardly or outwardly of the opening, and turns back on itself to provide an outer surface onto which the faceplate edge is bonded. By spacing the portions of the flange extending in opposite directions slightly apart, minor variations in the flatness of the faceplate and/or flange surface can also be accommodated.
REFERENCES:
patent: 2635205 (1953-04-01), Olson
patent: 2969163 (1961-01-01), Roberts
patent: 3171771 (1965-03-01), Badger et al.
patent: 3219225 (1965-11-01), Hempel
patent: 4268712 (1981-05-01), Overall
patent: 4325489 (1982-04-01), Russell et al.
patent: 4522309 (1985-06-01), Overall et al.
DeMeo Palmer C.
Fox John C.
U.S. Philips Corporation
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