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1940 - a craftsman checking the vacuum of an Ignitron built for metallurgical applications

POWER CONTROL FOR DEFENSE

CD 1967074 E&MP120.001

Rectifiers

December 20, 1940

Ignitron rectifiers, developed by Westinghouse research engineers to control electric power, are now being built for industries producing national defense materials.

In this photograph, a craftsman at the East Pittsburgh Westinghouse Works is shown checking the vacuum in one of several Ignitrons built for metallurgical applications.

These devices change alternating current into the direct current required in special processes. 


Original Caption by Science Service
Westinghouse



National Museum of American History

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