Cathode-ray and other vacuumized tubes resistant to fracture and capable of controlled devacuation

Claim 1

A CATHODE-RAY TELEVISION PICTURE TUBE ENVELOPE RESISTANT TO FRACTURE AND IMPLOSIVE-EXPLOSIVE EFFECTS ON BREAKAGE COMPRISING A GENERALLY FRUSTO-PYRAMIDAL SHAPED HOLLOW GLASS BODY MEMBER AND A GENERALLY RECTANGULARSHAPED CONCAVO-CONVEX LIGHT-TRANSMITTING GLASS VIEWING MEMBER SEALED TO THE LARGER END OF SAID BODY MEMBER AT A TRANSVERSE PLANAR SEAL LINE, THE PERIPHERY OF THE VIEWING PORTION OF SAID VIEWING MEMBER BEING SURROUNDED BY INTEGRAL ANNULAR SIDEWALLS OF SUBSTANTIALLY MAXIMUM CROSSSECTIONAL DIMENSIONS OF SAID ENVELOPE FORMING A NONVIEWING ANNULAR RIM PORTION, A FIRST DISCONTINUOUS ANNULAR BAND OF HIGH-TENSILE STRENGTH MATERIAL HAVING A CONCAVOCONVEX CROSS-SECTIONAL CONTOUR COMPLEMENTAL TO SAID RIM PORTION DISPOSED IN CLOSELY SURROUNDING RELATION THERETO, A SECOND ANNULAR BAND OF HIGH-TENSILE STRENGTH MATERIAL HAVING A FLAT RECTANGULAR CROSS-SECTIONAL CONTOUR DISPOSED EXTERIORLY OF SAID FIRST BAND IN AT LEAST PARTIALLY OVERLAPPING RELATION, BOTH HANDS BEING MOUNTED SUBSTANTIALLY FORWARD OF THE SEAL LINE, AND A CONTINUOUS ANNULAR LAYER OF SYNTHETIC RESIN BONDING MATERIAL DISPOSED INTERMEDIATE SAID FIRST AND SECOND ANNULAR BANDS AND THE GLASS EXTERIOR SURFACES OF SAID RIM PORTION THEREBENEATH, SAID ANNULAR BANDS AND ANNULAR LAYER OF SYNTHETIC RESIN BONDING MATERIAL CONJUNCTIVELY REINFORCING THE GLASS SIDEWALLS THEREBENEATH TO MAINTAIN THE SAME ESSENTIALLY FULLY INTACT UPON BREAKAGE OF THE ENVELOPE.