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Cyclometer

CYCLOMETER (Gr. (cuxXos , circle, and fierpov, measure), an instrument used especially by cyclists to determine the distance they have traversed. In a common form a stud attached to one spoke of the wheel engages with a toothed pinion and moves it on one tooth at each revolution. The pinion is connected with a train of clockwork, the gearing of which bears such a ratio to the circumference of the wheel that the distance corresponding to the number of times it has revolved is shown on a dial in miles or other units.

Note - this article incorporates content from Encyclopaedia Britannica, Eleventh Edition, (1910-1911)

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