Collins, A. Frederick (Archie Frederick), 1869- · Boston, Small, Maynard and company · leaf 234
up. These can be boughtready made with screw tops for 25 cents each. The Inlet and Exhaust Valves.—A simple wayto make both the inlet and the exhaust valves,if you havent a lathe, is to take a /46-inch elbowfor each one (see Chapter VI). Thread one of the ends on the outside and thenream it out to… … Fig. 72. Cross-Section View of Cylinder Showing Exhaust Mechanism Next make an open spiral spring of very thinbrass wire Vis inch in diameter. Put this on overthe valve stem with one of its ends resting against 220 The Boys Book of Engine-Building the elbow, slip on a washer and then screw twonuts…
Steam-engines
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