Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1976-09-01
1977-10-18
Griffin, Robert L.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358247, 220 21A, 220 23A, H01J 2987
Patent
active
040549135
ABSTRACT:
This disclosure depicts a color television picture tube having a glass bulb which includes an approximately rectangular, flangeless, three-dimensionally curved faceplate having a convex front surface, a concave rear surface and an edge surface. The bulb has a funnel with a convex seal land which mates with the concave inner surface of the faceplate. The tube has a hybrid implosion protection system comprising a high tensile strength frame which surrounds and closely hugs at least the edge surface of the faceplate to define a cavity between the frame and the edge surface. The cavity contains a hardened cement, the frame and cement binding up the edge surface of the faceplate to provide a measure of implosion protection. A tension member is disposed over the frame and the hardened cement in the cavity so as to surround the faceplate in straight lines between the faceplate corners. Means are provided on the frame for retaining the tension member on the faceplate corners. The member is under tension to produce radially inwardly directed force components acting on the faceplate corners through the frame and the hardened cement, the combination of the cemented frame and tension member producing a high degree of implosion protection for the bulb. A method for assembling the implosion protection system is also disclosed.
REFERENCES:
patent: 2222197 (1940-11-01), Engels
patent: 3512234 (1970-05-01), Bongenaar et al.
patent: 3730990 (1973-05-01), Miyata
patent: 4004092 (1977-01-01), Rogers
patent: 4016364 (1977-04-01), Rogers
patent: 4021850 (1977-05-01), Rogers
Coles Edward L.
Coult John H.
Griffin Robert L.
Zenith Radio Corporation
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