The pipe was only about 8
feet long, and so we had to piece it out with a long wooden box pipe. A
block closed the lower end of this box, and the leader pipe fitted snugly
into a hole in the block (Fig. 291). A spout was set into the upper end of
the box pipe to carry the water to the cask, which was to serve as our
water reservoir.
[Illustration: Fig. 290. Side View of the Wind Wheel, showing Brake.]
The Pump Valves.
We plugged the bottom of the leader pipe with a block of wood, in the
center of which a large hole was drilled. The hole was covered with a
piece of leather nailed at one side, so that it could lift up to let water
into the pipe. The piston was made of a disk of wood of slightly smaller
diameter than the inside of the pipe, and over it was fastened a piece of
leather just large enough to fit snugly against the walls of the pipe.
This piston was fastened to a wooden rod long enough to reach from well
within the pipe to the wind wheel shaft. A strip of brass was bent over
the crank, or U-shaped bend in the shaft, and its ends were fastened to
the rod.
[Illustration: Fig. 291. The Box Pipe.]
[Illustration: Fig. 292. The Lower Valve.]
[Illustration: Fig. 293. The Piston Valve.
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