Electric discharge tube having a glass-sealed electric leadthrou

Details Electric discharge tube having a glass-sealed electric leadthrou Electric discharge tube having a glass-sealed electric leadthrou

1979-06-18

1981-07-14

Chatmon, Jr., Saxfield

Electric lamp and discharge devices

Electrode and shield structures

With lead wire or connector

174 5057, 174 5061, 174152GM, 313332, 313477HC, H01J 550

Patent

active

042789125

ABSTRACT:
An electric discharge tube is provided with a hermetically sealed leadthrough which electrically connects electrodes on the inner and outer walls of the envelope. The leadthrough consists of an aperture in the envelope having a conductive layer provided on the wall of the aperture. The aperture is hermetically sealed by means of a plug of thermally devitrified glass which is provided in the form of a suspension of a devitrified glass powder in an organic binder. To manufacture the leadthrough, the envelope of the tube is subjected to temperature treatments in which at a first temperature range the binder is fired from the suspension in an oxygen-containing atmosphere, and at a second temperature range the devitrifiable glass is devitrified in a non-oxidizing atmosphere. A hermetically sealed leadthrough results, without excessive oxidation of the electrodes, while the deformation of the glass envelope at the area of the leadthrough is avoided.

REFERENCES:
patent: 2219107 (1940-10-01), Langmuir
patent: 3113878 (1963-12-01), Martin
patent: 3225132 (1965-12-01), Baas et al.
patent: 3370874 (1968-02-01), Scherer et al.
patent: 3379822 (1968-04-01), Haans et al.
patent: 3675062 (1972-07-01), Flasche
patent: 3712997 (1973-01-01), Fisher
patent: 3854069 (1974-12-01), Tagawa
patent: 3865970 (1975-02-01), Vrijssen
patent: 3912851 (1975-10-01), Vrijssen et al.
patent: 4155614 (1979-05-01), Hall

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