Hood, Grant · Kansas City, Mo. : Kansas City Jeweler and Optician · leaf 121
Fig. 3- getting this point thoroughly impressed upon our mind, thedrawing shown in Fig. 3 has been made. The R. stone is di-vided into six equal parts shown by the dotted lines length-wise. The amount of the Ibck should be equal to the width of 117 MODERN METHODS IN HOROLOGY. one of these spaces,… … Fig. 4. is shown locking the proper amount. The locking is denotedalso by the dotted line crossing the stone. (a-b) The Lstone is also shown by the side of the R. stone. Its greaterangle is clearly seen, but we will learn later that each of them 118 THE LEVER ESCAPEMENT. have the same number of…
Clocks and watches
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