Improvements relating to the manufacture of alternating current rectifiers of the dry contact type
摘要
<p>Selenium or tellurium, is converted to the metallic modification by cooling preferably to about -60 DEG C. A heat and pressure treatment may be applied before the cooling, to initiate the change.</p>
申请公布号
GB499759(A)
申请公布日期
1939.01.27
申请号
GB19370020751
申请日期
1937.07.27
申请人
WESTINGHOUSE BRAKE AND SIGNAL COMPANY LIMITED;ALBERT LESLIE WILLIAMS;LESLIE ERNEST THOMPSON
