| The Columbia Encyclopedia, Sixth Edition. 2001-07. |
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| Sperry, Elmer Ambrose |
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| 1860–1930, American inventor, b. Cortland, N.Y. Although probably best known for his work on the gyroscope, he also invented the gyrocompass (1910), an extremely effective high-intensity searchlight, a new system of street lighting, and numerous electrical devices. He founded the American Institute of Electrical Engineers and the American Electrochemical Society. |
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| | | The Columbia Encyclopedia, Sixth Edition. Copyright © 2007 Columbia University Press. |
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