Movement 86

86. A method of working a reciprocating pump by rotary motion. A rope, carrying the pump-rod, is attached to the wheel, A, which runs loosely upon the shaft. The shaft carries a cam, C, and has a continuous rotary motion. At every revolution the cam seizes the hooked catch, B, attached to the wheel, and drags it round, together with the wheel, and raises the rope until, on the extremity of the catch striking the stationary stop above, the catch is released, and the wheel is returned by the weight of the pump-bucket.