Patent for a pump "of the double-cylinder type, in which a continuous and steady stream of water is sucked from the well and forced to the point of use, and in such a pump to provide means for operating the same, whereby the same power will be required to raise the plunger that it does to force the same downward, and to this end providing such improved mechanisms and connections which will evenly distribute the power exerted by the operator to actuate the pump" (lines 9-19).