Westinghouse-brake
noun
1.
a railroad air brake operated by compressed air.
Westinghouse brake
/ˈwɛstɪŋˌhaʊs/
noun
1.
a braking system, invented by Westinghouse in 1872 and adopted by US railways, in which the brakes are held off by compressed air in the operating cylinder: controlled leakage of the air or a disruptive emergency causes the brakes to be applied. The system is used on most heavy vehicles and is replacing the vacuum system on many railways
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