Method of manufacturing a picture display tube having a gas-abso

Details Method of manufacturing a picture display tube having a gas-abso Method of manufacturing a picture display tube having a gas-abso

1982-02-23

1984-11-06

Ramsey, Kenneth J.

Electric lamp and discharge devices

Cathode ray tube

Envelope

417 48, 445 19, 445 55, H01J 920

Patent

active

044814410

ABSTRACT:
A gettering device installed in a picture display tube includes an annular, channel-shaped metal holder containing an evaporable gettering metal and a heat-activated gas releasing material. The gas releasing material is disposed in the holder against a surface which rapidly increases in temperature in response to inductive heating of the holder. This material is covered by the gettering metal to protect it against deterioration by exposure to moist, high temperature air during tube manufacturing processes occurring after installation of the device. During inductive heating, the temperature of the gas releasing material increases faster than that of the gettering metal and begins releasing gas before the gettering metal begins to evaporate.

REFERENCES:
patent: 3195716 (1965-07-01), Porta
patent: 3388955 (1968-06-01), Porta et al.
patent: 3669567 (1972-06-01), Porta et al.
patent: 4066309 (1978-01-01), Hellier
patent: 4225805 (1980-07-01), Smithgall et al.

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