释义 |
Sellers, William Sellers, William(1824–1905) manufacturer, engineer; born in Delaware County, Pa. In 1848 he began to manufacture machinists' tools and mill gearing in Providence and in 1886 he formed William Sellers & Co. He developed formulas for machining screw threads and nuts. He was also director of several railroads in the 1860s and 1870s. |