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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History and Etymology for Ramsbottom safety valve

after John Ramsbottom, 19th century British mechanical engineer

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