Elmer A. Sperry case file at the Franklin Institute contains records concerning his 1914 Franklin Award for the gyroscopic compass for the gyroscopic compass, filed June, 1911; issued September, 1918 US patent search page, search for Elmer and Sperry in Inventor name, 1790-present, yields about 160 results—some recent ones are by EA Sperry Jr, earliest ones not found Finding aids for the Elmer Ambrose Sperry papers and the Elmer Sperry photograph collection are available at Hagley Museum and Library.