[Illustration: Fig. 110]
[Illustration: Fig. 111]
[Illustration: Fig. 112]
The idea of the sliding center _I_ is to perfectly supply the place of
the opposite plate of the watch and give us exactly the same practical
depths as if the parts were in their place between the plates of the
movement. The foot of the pillar _D_ has a flange attached, as shown at
_f_, which aids in holding it perfectly upright. It is well to cut a
screw on _D_ at _D'_, and screw the flange _f_ on such screw and then
turn the lower face of _f_ flat to aid in having the pillar _D_
perfectly upright.
DETAILS OF FITTING UP ESCAPEMENT MATCHER.
It is well to fit the screw _D'_ loosely, so that the flange _f_ will
come perfectly flat with the upper surface of the base plate _B_. The
slide _G N_ on the pillar _D_ can be made of two pieces of small brass
tube, one fitting the pillar _D_ and the other the bar _F_. The slide _G
N_ is held in position by the set screw _g_, and the rod _F_ by the set
screw _h_.
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