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Updated: May 12, 2025
The power and displacer cranks must be set exactly at right angles to one another, and the first be secured by soldering or otherwise to the crank shaft. The fly wheel will revolve in that direction in which the displacer crank is 90 degrees ahead of the other. The packing of the piston should be sufficiently tight to prevent leakage of air, but not to cause undue friction.
The bottom of the block is protected by a disc of asbestos card held up to the wood by a disc of tin nailed on. The Crank Shaft and Crank. The central crank of the crank shaft that for the displacer has a "throw" of 1/4 inch, as the full travel of the displacer is 1/2 inch. Holes for the shaft are bored near the tops of the supports, and the shaft is put in place.
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