Frank Baldwin (1838–1925) was an American inventor who’s 1875 patent was a masterclass in internal spatial efficiency. But he lacked the commercial machinery and nous to turn his logic into marketable machine. He spent decades refining his designs in relative obscurity until he met Jay R. Monroe.
Baldwin’s architecture was the hidden engine of the Monroe era; his redesigned internal wheels allowed for a machine that could handle complex multiplication and division with a fluidity that simpler adding machines could not match. He understood that the elegance of the internal gear determines the longevity of the machine.