Air brake

The air brake uses compressed air to simultaneously stop every wheel on a train, greatly improving rail safety. This invention overcame the difficulty of manually stopping trains, which involved significant risks of collisions and accidents.
 George Westinghouse United States 1868 Air brake

The air brake uses compressed air to simultaneously stop every wheel on a train, greatly improving rail safety. This invention overcame the difficulty of manually stopping trains, which involved significant risks of collisions and accidents.