Sturgeon, William (1783–1850)
British electrical engineer who demonstrated (1825) the first
electromagnet capable of useful work.
It consisted of a soft, iron core insulated with varnish and wound with
18 turns of bare copper wire; it was capable of supporting 4kg (9lb) and
was powered by a single cell. Sturgeon also built an electric
motor, invented the commutator, and
the suspended coil galvanometer, and
studied charges in clouds by flying kites.