Arthur William Haydon (April 25, 1906– January 11, 1982) (known as A. W. or Bill Haydon) was an American inventor known for his work in the field of microminiature electrical timing and governing devices for industrial and military use, some of which were to be used in early computing devices. Haydon secured and was granted 82 U.S. patents from 1931 to 1984, many of which still have wide industrial use today. In 1933, Haydon set up his own development shop under the name of Haydon Laboratory in Waterbury, Connecticut . In 1937, Haydon Manufacturing Company was incorporated.