H - Electricity – 01 – J
Patent
H - Electricity
01
J
316/11, 313/35.1
H01J 29/87 (2006.01)
Patent
CA 1069575
ABSTRACT OF THE DISCLOSURE 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 tile 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 flame and tension member producing a high degree of implosion protection for the bulb. A method for assembling the implosion protection system is also disclosed. -2-
264441
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