andfrom the intersection of this arc with the line g k we lay off sixteendegrees on the said arc / and establish the point n, from g as a 128 Watch and Clock Escapements. center draw the radial line g n. Take ten degrees from the sameparent arc and establish the point m, then draw the line g m.… … Fig. 134 To delineate the U arms we refer to Fig. 135. Here, again,we draw the arc a b c and delineate a tooth as before. From thepoint e located at the heel of the tooth we draw the radial line e e.From the point e we lay off on the arc a five degrees and establishthe point p ; we halve this space…
Clocks and watches
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