John C. Purves received an SB in civil engineering in 1918 and an SB in mechanical engineering in 1920 from the Massachusetts Institute of Technology (MIT). He founded the Purves Corporation to develop the flux-valve--an electrical coil which senses the direction of magnetic north. The invention was licensed to the Sperry Gyroscope Company in 1940 and became a component of accurate airplane navigational equipment widely used in World War II. The collection includes Purves's correspondence...
1934 - 1977