Cathode-ray tube

Details Cathode-ray tube Cathode-ray tube

1978-05-19

1979-11-13

Vertiz, O. R.

Electric lamp and discharge devices

Cathode ray tube

Envelope

106 53, 252478, H01J 3120, C03C 310, C03C 330

Patent

active

041744900

ABSTRACT:
Disclosed is a cathode-ray tube having a face plate of soft glass which up to an accelerating voltage of 40 KV gives an X-ray emission of at most 0.5 mr/h measured at a distance of 5 cm. The glass has a strain point between 450.degree. and 480.degree. C. and a softening temperature between 660.degree. and 770.degree. C. and comprises, inter alia, 3-14% by weight of BaO and 5-10% by weight of PbO.

REFERENCES:
patent: 3464932 (1969-09-01), Connelly et al.
patent: 3663246 (1972-05-01), LaGrouw
patent: 3794502 (1974-02-01), LaGrouw
patent: 3819972 (1974-06-01), Sanner
patent: 3907584 (1975-09-01), Wade et al.
patent: 3925089 (1975-12-01), Houben
patent: 3987330 (1976-10-01), Shell
patent: 4065696 (1977-12-01), Steierman
patent: 4065697 (1977-12-01), Steierman

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