To employ this tool for getting the proper length to which to cut
the pivot _y_, Fig. 171, we remove the lower cap jewel to the cylinder
pivot and, holding, the movement in the left hand, pass the pivot _s_,
Fig. 175, up through the hole jewel, regulate the length by turning the
sleeve _F_ until the arm of the escape wheel _I_, Fig. 176, will just
turn free over it. Now the length of the pivot _s_, which protrudes
beyond the sleeve _F_, coincides with the length to which we must cut
the pivot _y_, Fig. 171. To hold a cylinder for reducing the length of
the pivot _y_, we hold said pivot in a pair of thin-edged cutting
pliers, as shown at Fig. 177, where _N N'_ represent the jaws of a pair
of cutting pliers and _y_ the pivot to be cut. The measurement is made
by putting the pivot _s_ between the jaws _N N'_ as they hold the pivot.
The cutting is done by simply filing back the pivot until of the right
length.
TURNING THE PIVOTS.
We have now the pivot _y_ of the proper length, and what remains to be
done is to turn it to the right size.
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