This pump was designed in the 1800's by John
Ericsson, designer of the Civil War battleship Monitor. |
The Ericsson Hot Air Pump had many advantages for rural customers: It was reliable, ran on virtually any fuel, had easily replaced parts, and could not explode. (No steam is used, only a few cubic feet of hot air.)
A fascinating series of linkages sequences all the events. The pump works by continuously heating and cooling the same air. The heated air expands and pushes up the TRANSFER PISTON (shaded gray here).
The air is transferred around the edges of Transfer Piston to the space between the top of the transfer piston and the AIR PISTON. Water circulating around the cylinder cools the air, causing it to contract.
The water that cools the air was just brought up from the well. It exits via the outlet pipe (behind, not shown.) The Air Piston pushes the cooled, contracted air down past the Transfer Piston and the cycle repeats.
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