Søren Hjorth

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.

...
Wikipedia