Manufacture of electrical rectifiers

521,455. Asymetrically-conducting resistances. WESTINGHOUSE BRAKE & SIGNAL CO., Ltd. Nov. 18, 1938, No. 33566. Convention date, Dec. 27, 1937. [Class 37] Previous to the normal oxidizing treatment, copper blanks for rectifiers are heated to about 1000C. in an oxidizing atmosphere and the oxide...

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1. Verfasser:	DOWLING PHILIP H
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRICITY SEMICONDUCTOR DEVICES
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creator	DOWLING PHILIP H
description	521,455. Asymetrically-conducting resistances. WESTINGHOUSE BRAKE & SIGNAL CO., Ltd. Nov. 18, 1938, No. 33566. Convention date, Dec. 27, 1937. [Class 37] Previous to the normal oxidizing treatment, copper blanks for rectifiers are heated to about 1000C. in an oxidizing atmosphere and the oxide layer thus produced removed, for example by nitric acid, and the blanks washed to free them from traces of acid &c.
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title	Manufacture of electrical rectifiers
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