Electric lamp and discharge devices – Cathode ray tube – Envelope
Patent
1984-02-22
1986-08-19
DeMeo, Palmer C.
Electric lamp and discharge devices
Cathode ray tube
Envelope
220 21A, 501 86, 228122, 65154, H01J 2986, B23K 3100, C03B 2320, C03C 2704
Patent
active
046071890
ABSTRACT:
A cathode ray tube (1) having a body (3) of glass material and a faceplate (5) of solid phosphor material. The body (3) and faceplate (5) are sealed together by a sealant (15) of malleable halide material--for example silver chloride, or lead-silver chloride eutectic. Sealing is effected by inserting a ring (15) of sealant material between abutting surfaces of the body (3) and the faceplate (5), heating in vacuum to above the melting point of the sealant, and cooling to allow the sealant to solidify. The faceplate (5) may be of single crystal material--e.g. zinc tungstate or calcium borate, or may be of hot pressed solid material--e.g. zinc yttrium silicate.
REFERENCES:
patent: 254312 (1882-02-01), Heaton et al.
patent: 2203682 (1940-06-01), Foulke
patent: 2330171 (1943-09-01), Rosenthal
patent: 2915153 (1959-12-01), Hitchcock
patent: 3766634 (1973-10-01), Babcock et al.
patent: 3994430 (1976-11-01), Cusano et al.
patent: 4019080 (1977-04-01), Besson
DeMeo Palmer C.
O'Shea Sandra L.
The Secretary of State for Defence in Her Britannic Majesty's Go
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