(born Sept. 13, 1755, near Newport, Del.—died April 15, 1819, New York, N.Y., U.S.) U.S. inventor. Evans began early to apply himself to industrial problems.
He invented an improved carding device for use in the newly mechanized production of textiles. In 1784 he built a flour mill, for which he created the first continuous production line in any industry: all movement was automatic, power being supplied by waterwheels, and grain was passed by conveyors and chutes through the stages of milling and refining to emerge as finished flour. His high-pressure steam engine (patented 1790) deserves to share the credit for the invention often given solely to Richard Trevithick. His Amphibious Digger (1805), a steam-engine scow that could run on both land and water, was the first powered road vehicle to operate in the U.S. His Mars Iron Works (founded 1806) made more than 100 steam engines for use with screw presses for processing cotton, tobacco, and paper.
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