![]() ![]() George Westinghouse invented air brakes for trains starting in 1869 these brakes considerably improved the safety of rail operations. Compressed air drills were applied at mines in the United States in the 1870s. An early major application of compressed air was in the drilling of the Mont Cenis Tunnel in Switzerland in 1861, where a 600 kPa (87 psi) compressed air plant provided power to pneumatic drills, increasing productivity greatly over previous manual drilling methods. Industrial use of piped compressed air for power transmission was developed in the mid 19th century unlike steam, compressed air could be piped for long distances without losing pressure due to condensation.
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