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The modern clock; a study of time keeping mechanism; its construction, regulation, and repair (1905)

Goodrich, Ward L · Chicago, Hazlitt & Walker · leaf 227

An illustration from The modern clock; a study of time keeping mechanism; its construction, regulation, and repair, 1905, leaf 227
K. the eccentricity of the wheel would be hardly as great asshown; nevertheless, assuming such a case to occur thedrawing will exactly indicate the imperfections arising fromthe use of a rounding-up tool. Presuming from the drawing that the wheel, as shown bydotted lines, had originally been cut… … il-: rounding-up tool. The cutter commences to remove themetal from tooth y, it being the highest, next the neighbor-mg teeth 6 and 8, then 5 and 9, and so on until tooth i comesin contact with the cutter. The wheel is now round. Buthow about the size of the teeth and the pitch ? The result ofthe…

Clocks and watches

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