Søren Hjorth

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Søren Hjorth (born October 13, 1801 in Vesterbygaard at Kalundborg in the west of Zealand (Denmark) ; died August 28, 1870 in Copenhagen ) was a Danish railway pioneer and inventor. Before Werner von Siemens, he discovered the dynamo-electric principle in 1854 and received the first patent for a self-excited dynamo.


  • Søren Hjorth, inventor of the dynamo-electric principle; by Sigurd Smith. Pub. by "Elektroteknisk forening" at the expense of the Carlsberg foundation. (1912)