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noun dash-pot, dashpot n. (Mach.) A mechanical damping device containing a piston that moves in a fluid-filled chamber to serve as a pneumatic or hydraulic cushion for a falling weight, as in the valve gear of a steam engine, to prevent shock. Note: It consists of a chamber, containing air or a liquid, in which a piston (a), attached to the weight, falls freely until it enters a space (as below the openings, b) from which the air or liquid can escape but slowly (as through cock c), when its fall is gradually checked. Note: A cataract of an engine is sometimes called a dashpot.
Collaborative International Dictionary of English 0.48
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