Ramsbottom safety valve
noun
Rams·bot·tom safety valve
\ˈramzˌbätəm-\
Definition of Ramsbottom safety valve
: a safety valve used especially on locomotives in which two valves are pressed down by a single spring attached to a crosspiece prolonged to form a hand lever by which the valves may be eased up to test their adjustment
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Origin and Etymology of ramsbottom safety valve
after John Ramsbottom, 19th century British mechanical engineer
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