Hornblower, Jonathan Carter

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Hornblower, Jonathan Carter

(born July 5, 1753, Chacewater, Cornwall, Eng.—died March 1815, Penryn, Cornwall) British inventor. He and his father, Jonathan (1717–80), worked for James Watt. Seeking to improve on Watt's steam-engine design, he devised the first reciprocating compound steam engine (patented 1781); his engine had two cylinders (see piston and cylinder), a significant contribution to efficiency. In 1799 it was judged an infringement on Watt's patent.

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