[Illustration: Fig. 27]
This plan will insure the escape wheel and pallet staff being perfectly
upright. The same course pursued with the plate _C_ will insure the
balance being upright. The pillars which support the bridges are shaped
as shown at Fig. 28, which shows a side view of one of the pillars which
support the top plate or bridge _C_. The ends are turned to 1/4" in
diameter and extend half through the plate, where they are held by
screws, the same as in American movements.
[Illustration: Fig. 28]
The pillars (like _H_) can be riveted in the lower plate _A_, but we
think most workmen will find it more satisfactory to employ screws, as
shown at Fig. 29. The heads of such screws should be about 3/8" in
diameter and nicely rounded, polished and blued. We would not advise
jeweling the pivot holes, because there is but slight friction, except
to the foot of the balance pivot, which should be jeweled with a
plano-convex garnet.
[Illustration: Fig. 29]
IMITATION RUBIES FOR CAPPING THE TOP PIVOTS.
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