Frank Julian Sprague was an American naval officer and inventor who contributed to the development of the electric motor, electric railways, and electric elevators. His contributions were especially important in promoting urban development by increasing the size cities could reasonably attain and by allowing greater concentration of business in commercial sections. He became known as the "Father of Electric Traction". He demonstrated an aptitude for science and mathematics, Sprague secured an appointment to the U.S. Naval Academy in 1874. He pursued his electrical studies relentlessly after graduation in 1878 and 2 years at sea.