Sperry Gyroscope was an aircraft company specializing in gyroscopes.
"One of three Sperry bomb sights. The Sperry's, after gaining world-wide fame in making scientific instruments for ships, undertook to solve the most difficult problems in aerial navigation and aerial warfare. Having begun in the early days of aeronautics they were able, through their long experience in aeronautics, and through knowledge of the problems, to evolve some of the most efficient instruments." --
Henry Woodhouse,
Textbook of Military Aeronautics (1918), p. 20.
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w:Sperry Corporation