Sturgeon, William

Sturgeon, William

▪ British electrical engineer
born May 22, 1783, Whittington, Lancashire, Eng.
died Dec. 4, 1850, Prestwich, Lancashire

      English electrical engineer who devised the first electromagnet capable of supporting more than its own weight. This device led to the invention of the telegraph, the electric motor, and numerous other devices basic to modern technology.

      Sturgeon, self-educated in electrical phenomena and natural science, spent much time lecturing and conducting electrical experiments. In 1824 he became lecturer in science at the Royal Military College, Addiscombe, Surrey, and the following year he exhibited his first electromagnet. The 7-ounce (200-gram) magnet was able to support 9 pounds (4 kilograms) of iron using the current from a single cell.

      Sturgeon built an electric motor in 1832 and invented the commutator, an integral part of most modern electric motors. In 1836, the year he founded the monthly journal Annals of Electricity, he invented the first suspended coil galvanometer, a device for measuring current. He also improved the voltaic battery and worked on the theory of thermoelectricity. From more than 500 kite observations he established that in serene weather the atmosphere is invariably charged positively with respect to the Earth, becoming more positive with increasing altitude.

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Universalium. 2010.

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