Elmer Sperry

This is a biography of a major American inventor. <strong>Elmer Sperry</strong> contributed greatly to the technological changes occurring between 1880 and 1930... » 

This is a biography of a major American inventor. Elmer Sperry contributed greatly to the technological changes occurring between 1880 and 1930. Characteristic of his various inventions were feedback controls which have made automation a fact of life. «