John Ericsson

John Ericsson (born Johan Ericsson; 31 July 1803 to 8 March 1889) was a Swedish-American engineer and inventor active in England and the United States. He collaborated on the design of the steam locomotive Novelty, which competed in the Rainhill Trials on the Liverpool and Manchester Railway, won by George Stephenson's Rocket. In North America he designed the United States Navy's first screw-propelled steam frigate, USS Princeton, and in partnership with Cornelius H. DeLamater of the DeLamater Iron Works in New York City he produced the first armored ironclad warship with a rotating gun turret, USS Monitor. The Ericsson heat engine cycle bears his name.