Wilfred_Lewis--Robert_Rowe_Gilruth

Wilfred Lewis (October 16, 1854 - December 29, 1929) was an American mechanical engineer, inventor, director for the machine tool firm William Sellers & Co, and later president of the Tabor Manufacturing Company. He is known for his early work on the bending of gear teeths, and his later work on scientific management. In the late 19th century Lewis had developed a bending equation, which became standard for gear design. The Lewis stress factor for gears is named after him.