Awarded the Dexter Prize of the Society for the History of Technology A major Amercan inventor who obtained more than 350 patents during his lifetime, Elmer Sperry contributed greatly to the momentous technological changes that occured between 1880 and 1930. Best known for the Sperry gyrocompass and automatic pilot, his inventions included arc-light systems, mining machinery, electric automobiles and streetcars, and electrochemical processess...