Hawkins, N. (Nehemiah), 1833- · New York : Theo. Audel · leaf 287
Fig. 249. … Fig. 2oU. piston, cam and valve will move in the direction indicatedby the arrows. The first movement of the cam oscillatesthe valve, preparatory to bringing it into a proper positionfor the opening of the auxiliary steam ports, E, to live The Steam Pump. 280 steam, and E, to exhaust also to close…
Hydraulic machinery · Pumping machinery
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