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Expired
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GB1560721A
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Individual
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H01J35/20—Selection of substances for gas fillings; Means for obtaining or maintaining the desired pressure within the tube, e.g. by gettering
Landscapes
X-Ray Techniques
(AREA)
Abstract
185,510. Schall, W. E. June 6, 1921. Electrically-actuated valves.- A gas valve e which is normally closed, is opened by a solenoid x acting on a core.
GB1560721A1921-06-061921-06-06Improvements in or connected with x-ray tubes
ExpiredGB185510A
(en)