Elmer A. Sperry (1860-1930) was an electrical engineer who established the Electric Light, Motor, and Car Brake Company in 1883 and then founded the Sperry Electric Mining Machine Company in 1886. After selling his patents to General Electric, he went to work for the company as a consultant. This collection includes original materials, as well as copy work from other sources and images which show Sperry's inventions; there is some ephemera, family photos, employees, and views of the Sperry Company's Brooklyn drafting rooms.