Benjamin Franklin
Franklin is known for his experiments with electricity – most notably the kite experiment – a fascination that began in earnest after he accidentally shocked himself in 1746. By 1749, he had turned his attention to the possibility of protecting buildings—and the people inside—from lightning strikes. Having noticed that a sharp iron needle conducted electricity away from a charged metal sphere, he theorized that such a design could be useful.
Franklin’s pointed lightning rod design proved effective and soon topped buildings throughout the Colonies.