ion against the leaf v. Care must be taken to touchonly the addendum of the tooth so as not to weaken the 222 THE MODERN CLOCK. teeth. The circumference i will be that of a pinion of ac-curate size, and if the pinion is replaced, it will be necessaryto diminish the wheel so that its pitch circle… … Fig. 71 pinion has as its pitch circle the line k, inscead of i, whichwould be nearer the size with reference to that of the wheel.This is purposely drawn a little small for clearness of illus-tration. The essential defect of such a gearing can be seen;the butting produced between the tooth p and…
Clocks and watches
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