Word: vacuums
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Dates: during 1930-1939
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...major scientific development, which will mean the saving of thousands of dollars worth of electric power annually through increased efficiency of the vacuum tube, or "electric valve," in controlling electricity, was announced last Wednesday by the Cruft Laboratory of Communication Engineering...
...findings, which are considered to be one of the greatest contributions to the development of the use of power vacuum tubes in recent years, are the result of ten years' work in the Harvard laboratories by Emory L. Chaffee, Gordon McKay Professor of Physics and Communication Engineering...
Chaffee has developed the first satisfactory methods of testing the complex operation of vacuum tubes and thus increasing their efficiency through scientific and mathematical analysis...
...replacing the relatively crude, haphazard, and extremely expensive method of improving vacuum tube performance by trial and error, hitherto universally applied, Chaffee is believed to have opened the way to much wider development and use of the electric "valves...
While the vacuum tube is one of the most vital tools of modern industry and science, with hundreds of millions of units now in operation, the tube has been developed slowly in efficiency because of the forbidding jungle of interlocking mathematical functions involved in its operation...