Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,487 pages of information and 233,925 images on early companies, their products and the people who designed and built them.
Søren Hjorth (13 October 1801-28 August 1870) was a Danish railway pioneer and inventor.
1849 Hjorth patented various types of electro-magnetic machine (English patent 26 April 1849), which were described and illustrated in The Practical Mechanic's Journal . One resembled a two-cylinder vertical oscillating engine (see illustration). Magnets or electromagnets corresponded to pistons and cylinders. The machine had a flyball governor which regulated the supply of current. The commutator was worked by an eccentric, like a slide valve.