William Sellers

William Sellers (born Sept. 19, 1824, Upper Darby, Pa., U.S.—died Jan. 24, 1905, Philadelphia, Pa.) was an American engineer and manufacturer. Sellers was born into a distinguished scientific family. The first of his firms manufactured machinists’ tools and mill gearing. His formulas for matching screw threads and nuts (1864) became the U.S. standards. In 1868 he founded Edge Moor Iron Co., which became the largest plant in the world for supplying and building iron bridges...