What occupation did both William Sellers and Joseph Whitworth have?
William Sellers William Sellers (September 19, 1824 – January 24, 1905) was a mechanical engineer, manufacturer, businessperson, and inventor who filed more than 90 patents, most notably the design for the United States standard screw thread. As president of the Franklin Institute in Philadelphia, Pennsylvania, Sellers proposed the adoption of a system of screw threads which was easier for ordinary mechanics and machinists to cut than a similar design by Joseph Whitworth. For many years, he led the machine tool firm of William Sellers & Co., which was a very influential machine tool builder during the latter half of the 19th century.
William Salesbury (of Rhug) William Salesbury (1580–1660) was a Welsh privateer in the East Indies, poet and politician who sat in the House of Commons from 1621 to 1622. He was Governor of Denbigh Castle, fought on the Royalist side in the English Civil War and held out for over six months until the final days of the war and only surrendered on the written instruction of Charles I.