To give
service and efficiency to the screw _h_, we thicken the side of the
sleeve _F_ by adding the stud _w_, through which the screw _h_ works. A
soft metal plug goes between the screw _h_ and the bar _F_, to prevent
_F_ being cut up and marred. It will be seen that we can place the top
plate of a full-plate movement in the device shown at Fig. 109 and set
the vertical centers _I_ so the cone points _n_ will rest in the pivot
holes of the escape wheel and pallets. It is to be understood that the
lower side of the top plate is placed uppermost in the movement holder.
[Illustration: Fig. 121]
If we now reverse the ends of the centers _I_ and let the pivots of the
escape wheel and pallet staff rest in the hollow cones of these centers
_I_, we have the escape wheel and pallets in precisely the same position
and relation to each other as if the lower plate was in position. It is
further to be supposed that the balance is in place and the cock screwed
down, although the presence of the balance is not absolutely necessary
if the banking screws are set as directed, that is, so the jewel pin
will just freely pass in and out of the fork.
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