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First compressors are seen
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First stage or compound air compressor in patented
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Alfred Beach built a train subway in N.Y.C. run by pneumatics, it was the first subway
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Samuel Ingersoll invented pneumatic drill
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compressor efficiency improved by having cylinders cooled by water jets which led to the invention of water cool cylinders
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Pneumatics were able to have 90 p.s.i
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1st pneumatic tube in the U.S. is listed in patent to Sam Clegg and Jacob Selvan
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Today pneumatics are used as dental drills and in industrial plants
