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George Westinghouse (1846-1914), US inventor and electrical engineer. Westinghouse served in both the army and navy during the US Civil War, and then became a prolific inventor. He designed an air brake for trains, a device that became standard in the USA and Europe. He also developed pneumatic railroad signals. Other inventions include a safe system for piping natural gas, and modifications to generators and transformers. He pioneered the use of alternating current (AC) electricity in the USA, and founded an AC supply in Pittsburgh, Pennsylvania. He was awarded the John Fritz medal. This photograph, from a glass negative, is part of the George Grantham Bain Collection.
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