Frank Stephen Baldwin

Frank Stephen Baldwin was an American who invented a pinwheel calculator in 1874. He started the design of a new machine in 1905 and was able to finalize its design with the help of Jay R. Monroe who eventually bought the exclusive rights to the machine and started the Monroe Calculating Machine Company to manufacture it.

He was born on April 10, 1838 in New Hartford, Connecticut. In 1840 the family moved to Nunda, New York where he attended the Nunda Institute for elementary school. In 1854 he was enrolled at Union College in Schenectady, New York, but left when his father had an accident that left him as an invalid for the rest of his life. Frank then took over the management of his fathers architectural business. In 1855, Frank applied for a patent on an arrowhead selfcoupler for railroad cars, but the patent was rejected.

Source: Wikipedia