Ramsbottom safety valve

English

Etymology

Named after English mechanical engineer John Ramsbottom.

Noun

Ramsbottom safety valve (plural Ramsbottom safety valves)

  1. A kind of tamperproof safety valve for use on locomotives, consisting of two plug-type valves connected by a spring-laden pivoting arm.
    • 1951 April, “Notes and News: Locomotive Notes: London Midland Region”, in Railway Magazine, number 600, page 283:
      The boiler had a large dome over the firebox, inside the cab, surmounted by Ramsbottom safety valves.
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