ˈchain-pump
A machine for raising water by means of an endless chain; most commonly the chain passes in its upward course through a tube, and raises the water by means of disks or valves which fit the tube; sometimes the chain has simply a number of buckets or cups, by which the water is lifted to the top and there emptied out.
| a 1618 Raleigh Inv. Shipping 16 The Chaine pumpe, which takes up twice as much water as the ordinary did. 1781 Archer in Naval Chron. XI. 288 The chain pump was choaked. 1830 Marryat King's Own xix, He requires the chain-pumps to be manned. |