60. Parallel to the long edges, and 3/8 inch away, scribe bending lines.
Join these by lines 5/8 inch from the short edges, and join these again by
lines 1/4 inch from the bending lines. Cuts must now be made along the
lines shown double in Fig. 60. Bend parts CC down and parts BB upwards, so
that they are at right angles to parts AA. The positions of these parts,
when the piece is applied to the cylinder, are shown in Fig. 62.
[Illustration: FIG. 61.--Valve plate and steam ways in section.]
One must now make the bridge pieces (Fig. 61, a, a) to separate the inlet
passages from the exhaust. Their width is the distance between the
bent-down pieces CC of Fig. 60, and their bottom edges are shaped to the
curvature of the cylinder barrel. Finally, make the pieces bb (Fig. 61),
which form part of the top of the steam ways.
In the assembling of these parts a blowpipe spirit lamp or a little "Tinol"
soldering lamp will prove very helpful.
The following order should be observed:
(1.) Solder the piece shown in Fig. 60 to the cylinder barrel by the long
edges, and to the cylinder supports at the ends.
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