Hawkins, N. (Nehemiah), 1833- · New York : Theo. Audel · leaf 189
h water, and immediately meets with a resist-ance which would be insurmountable were the water not allowed to gosomewhere. (See next page.) 189 190 Ptunps and Hydraulics. Between the upper and lower parts of the plunger a cupleather is introduced before these parts are screwed together.This cup… … Fig. 157. with a curved toe at one side. This iron disc is secured to theflat leather valve by a screw that passes through the valve andis threaded in the disc. The object of this toe upon the disc is to open the lowervalve by means of raising the pump handle as far as it will gowhich lowers the…
Hydraulic machinery · Pumping machinery
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