more than onetooth. The upper end of I is broad enough to cover threeteeth of the wheel, G, when pushed outward, and the slotin E is long enough so that F may descend far enough topush G forward three teeth at once, unless it is stopped byH falling into a tooth, so that the position of I, when it… … Fig. 114. The months change gear. THE MODERN CLOCK. ^fi^^ thus making the.changes from 30 to i. The wide tooth, M,and cam, K, acting together, make the change for Februaryfrom 28 to 31. The 29th day is added by the movement ofthe cam, K, narrowing the acting surface once in four years,as follows:…
Clocks and watches
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