Charles Proteus Steinmetz

Charles Proteus Steinmetz was an American mathematician and electrical engineer and professor at Union College. He fostered the development of alternating current that made possible the expansion of the electric power industry in the United States, formulating mathematical theories for engineers. He made ground-breaking discoveries in the understanding of hysteresis that enabled engineers to design better electromagnetic apparatus equipment, especially electric motors for use in industry.

9 April 1865

Born on the same birth date (9 April 1865): Erich Ludendorff

Born on the same birth day (9 April): Arthur Shaw (footballer, born 1924) • Avery Schreiber • Barnaby Kay • Jeff Reed (American football) • Johann Matthias Gesner • Margo Smith • Rachel Stevens • Robert Bauer (footballer) • Ryan Clark (actor) • Theobald Boehm • Óscar Razo

Born in the same month (April 1865): Akseli Gallen-Kallela • Alfred Hoare Powell • Aliagha Shikhlinski • Charles W. Woodworth • Erich Ludendorff • Harry Chauvel • Jack Miner • Max Nettlau • Richard Adolf Zsigmondy • Ursula Ledóchowska