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For the writer Simon Lake, see the pseudonym of Charles L. Grant.

Simon Lake (September 4, 1866 - June 23, 1945) was a Quaker American mechanical engineer and naval architect who obtained over two hundred patents for advances in naval design and competed with John Philip Holland to build the first submarines for the United States Navy.

Born in Pleasantville, New Jersey, Lake joined his father's foundry business after attending public schools in New Jersey and Pennsylvania. Lake had a strong interest in undersea travel.

He built his first submarine, Argonaut Junior, in 1894 in response to an 1893 request from the Navy for a submarine torpedo boat. Neither Argonaut nor Lake's following submarine, Protector, built in 1901, were accepted by the Navy. Protector was the first submarine to have diving planes mounted forward of the conning tower and a flat keel. Four diving planes allowed Protector to maintain depth without changing ballast levels. Protector also had a lock-out chamber for divers to leave the submarine. Lake, lacking Holland's financial backing, was unable to continue building submarines in the United States. He sold Protector to Imperial Russia in 1904 and spent the next seven years in Europe designing submarines for the Austro-Hungarian Navy, the Kaiserliche Marine, and Imperial Russian Navy (Osetr class submarine).

He lived in Milford, Connecticut from 1907 until his death in 1945. A grammar school named in his honor closed in June of 2010. In 1912, he founded the Lake Torpedo Boat Company in Bridgeport, Connecticut, which built 24 submarines for the United States Navy during and after World War I. Lake's first submarine for the U.S. Navy, , set a depth record of 256 feet (78m) in November 1912.

In 1922 the United States and other countries signed treaties limiting the size of their navies. This led to financial difficulties which forced the Lake Torpedo Boat to close in the mid-1920s. Following company closure, Lake continued designing maritime salvage systems including a failed attempt to salvage gold from , a British frigate that sank in 1780 in New York's East River with his submarine, the Explorer. He advised the United States Navy on submarine technology and maritime salvage during World War II. By his death, Lake had witnessed the submarine's arrival as a front-line weapon in the US Navy.

The US Navy built a class of vessels for use as submarine tenders named in his honor theSimon Lake class; was in service between 1964 and 1999.

In 1989 Simon Lake was inducted into the Toms River Schools Hall of Fame.

This author page uses material from the Wikipedia article "Simon Lake", which is released under the Creative Commons Attribution-Share-Alike License 3.0