If the outer rail is super-elevated
slightly, there will be less tendency for the rolling stock to jump the
track when rounding the curve.
When the rails are in place the boards may be cut with a pad-saw to curves
corresponding with the breadth of the track on the straight. If the boards
incline to warp, screw some pieces of 1/8-inch strip iron to the under side
across the grain, sinking the iron in flush with the wood.
The brass strip for the rails costs about one penny per foot run. Iron
strip is much cheaper, but if it rusts, as it is very likely to do, the
contact places will need constant brightening.
Points.--Fig. 45 shows the manner of laying out a set of points, and
connecting up the rails. The outside wheel rails, it will be seen, are
continuous, and switching is effected by altering the position of the
moving tongues, pivoted at PP, by means of the rod R, which passes through
a hole in the continuous rail to a lever or motor of the same reversible
type as is used for the locomotive. If a motor is employed, R should be
joined to a crank pin on the large driven cog--corresponding to that
affixed to the driving wheel (Fig.
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