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1957 - new mobile radar set, capable of spotting a single enemy a half-mile away in total darkness, is aptly dubbed the Silent Sentry

QUIET KILOWATTS FOR SILENT SENTRY

E&MP59.023

Fuel Cells

September 20, 1957

Fort Huachuca, Ariz. - The U.S. Army Signal Corps' new mobile radar set, capable of spotting a single enemy a half-mile away in total darkness, is aptly dubbed the "Silent Sentry" and its power supply must obviously be just as quiet. The answer to the problem of providing quiet, portable power is a new fuel cell developed by National Carbon Company, Division of Union Carbide Corporation, which directly converts the chemical energy of gasses such as oxygen and hydrogen into electricity. Being demonstrated here this week at the U.S. Army Electronic Proving Ground is a battery of fuel cells that silently provides power at 28 volts. The new cell is the first to operate at normal temperatures and pressures, and fills a great need for a quiet, mobile economical source of power.

Original Caption by Science Service
Union Carbide



National Museum of American History

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