G-E INVENTOR AND WAR DEVICE HE HELPED DEVELOP
CD 2478045 E&MP12.014
Electric Appliances & Apparatus
September 4, 1943
Dr. E. F. W. Alexanderson, who with other General Electric engineers developed the amplidyne, is shown with the device.
By ingenious use of a short circuit and a coil arrangement known as a compensating field winding, the amplidyne makes possible delicate control of powerful electric machinery in war plants and on battle fronts.
For example, with the help of the amplidyne, the world's largest electric shovel, which stands 10 stories high, is now producing 100,000 more tons of coal a month.
additional text found...
Ordinarily an unfortunate accident, the short circuit has been put to work through the ingenuity of Dr. E.F.W. Alexanderson and other General Electric engineers.
The amplidyne which he is holding consists of a short circuit with a coil arrangement known as a compensating field winding.
It makes possible delicate control of powerful electric machinery in war plants and on battle fronts.
Original Caption by Science Service