John Ericsson

John Ericsson
Born	Johan Ericsson (1803-07-31)July 31, 1803 Långban, Filipstad Municipality, Värmland County, Sweden
Died	March 8, 1889(1889-03-08) (aged 85) New York City, U.S.
Citizenship	Sweden United States (1848–1889)
Known for	Ericsson cycle Screw propeller Torpedo
Notable work	Novelty USS Princeton USS Monitor
Relatives	Nils Ericson (brother)
Awards	Rumford Prize (1862)
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John Ericsson (born Johan Ericsson; July 31, 1803 – March 8, 1889) was a Swedish-American^[1] engineer and inventor.^[2] He was active in England and the United States.

Ericsson collaborated on the design of the railroad steam locomotive Novelty, which competed in the Rainhill Trials on the Liverpool and Manchester Railway, which were won by inventor George Stephenson's (1781–1848), Rocket. Later in North America, he designed the United States Navy's first screw-propelled steam-frigate USS Princeton, in partnership with Captain (later Commodore) Robert F. Stockton (1795–1866) of the U.S. Navy, who unjustly blamed him for the fatal accident of that new vessel. A new partnership with Cornelius H. DeLamater (1821–1889), of the DeLamater Iron Works in New York City resulted in the first armoured ironclad warship equipped with a rotating gun turret, USS Monitor, which dramatically saved the U.S. (Union Navy) naval blockading squadron from destruction by an ironclad Confederate States naval vessel, CSS Virginia, at the famous Battle of Hampton Roads harbor at the southern mouth of the Chesapeake Bay (at the confluence of the James and Elizabeth Rivers) in March 1862, during the American Civil War (1861-1865).