vacuum brake
noun
a brake system, used on British and many overseas railways, in which the brake is held off by a vacuum on one side of the brake-operating cylinder. If the vacuum is destroyed by controlled leakage of air or a disruptive emergency, the brake is applied. It is now largely superseded by the Westinghouse brake system
Words nearby vacuum brake
Example sentences from the Web for vacuum brake
In the 1886 tests there were five competitors—three buffer-brakes, one compressed-air brake, and one vacuum-brake.