oth contact at f. To establish this point wedraw the radial lines A c and A d from the escape-wheel center A,as shown, by laying off thirty degrees on each side of the intersec-tion of the vertical line i (passing through the centers A B) withthe arc a, and then laying off two and a half degrees on… … Fig. 90 center of our pallet staff at B. At two and a half degrees fromthe point c we lay off two and a half degrees to the right of saidpoint and establish the point n, and draw the radial line A n n,which establishes the extent of the arc of angular motion of theescape wheel utilized by the…
Clocks and watches
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