Frank Sprague

Frank Julian Sprague earned the title 'father of electric traction' because he successfully designed and installed the first large-scale electric street railway system in Richmond, Virginia, in 1888. This system proved that electric streetcars were a viable alternative to horse-drawn carriages and cable cars. His design maintained consistent speed under varying loads, revolutionizing urban transit.

While he didn't invent the very first elevator concept, Sprague pioneered the practical electric elevator alongside Charles Pratt. Their design used a newly developed electric motor system, which allowed for safe, reliable vertical transport without the need for hydraulic pumps. This invention was crucial in enabling the construction of modern, high-rise skyscrapers.

In 1884, Frank Sprague founded the Sprague Electric Railway & Motor Company to commercialize his electrical engineering inventions. The company was highly successful and eventually became part of the Edison General Electric Company (later General Electric) in 1890. His company's innovations in motor control laid the groundwork for modern electrical engineering standards.

Yes, early in his career, Frank Sprague briefly worked for Thomas Edison after leaving the US Navy. However, Sprague left Edison's employ because he disagreed with Edison's insistence on using direct current (DC) exclusively and felt his own ideas for motor design were being stifled. Despite this, the two men maintained a mutual professional respect throughout their lives.