American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 283
erforms no partwhatever in the action, no pains need be taken,though no good workman would leave theedge unfinished. We have now the cylinder complete, andcome to the formation of the wheel tooth, forhere all the action will be had and the impulsegiven. In the cut, we have given the present 366… … reasons we have given the above. Let c be thepoint, and a the heel of the proposed tooth;the amount of impulse may be seen by thelines that are concentric with the centre of thewheel. A simpL^ inspection will show the wholething at once, for if the impulse face of thetooth is in tlie straight line…
Clocks and watches
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