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US 4,031,553 AGranted
Implosion-resistant cathode ray tube with protective assembly for its face plate
AssigneeSony Corporation
InventorsHiroji Sumiyoshi, Tomosuke Chiba
Life of this patent
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AssigneeSony Corporation
InventorsHiroji Sumiyoshi, Tomosuke Chiba
Estimating the term…
A cathode ray tube having a metal reinforcing band girdling its envelope adjacent the face plate is provided with a transparent protective panel which covers the face plate and is affixed to the latter by a transparent conductive layer of an adhesive resin filling a space therebetween, and one or more conductive connecting elements providing an electrically conductive connection between the transparent conductive layer and the reinforcing band which is grounded. The transparent panel and the transparent conductive layer cooperate to protect the face plate from damage that might cause implosion of the tube envelope, and the connection of the transparent conductive layer to ground ensures that the protective panel will not be electrified, whereby to eliminate any shock hazard from contact therewith.
A cathode ray tube comprising an envelope having a face plate, a conductive reinforcing band girdling said envelope adjacent said face plate, a transparent protective panel covering the outer surface of said face plate and being spaced from the latter, a transparent conductive adhesive resin filling the space between said face plate and said panel to cooperate with the latter in protecting said face plate and adhesively joining said panel to said face plate, and at least one conductive connecting element providing an electrically conductive connection between said conductive material and said band.
Dependencies are inferred from the claim text.