Hood, Grant · Kansas City, Mo. : Kansas City Jeweler and Optician · leaf 247
Fig. 22. … Fig. 23.240 WHY SOME WORKMEN FAIL TO SUCCEED. A point that is often overlooked is the wear occasionedby the teeth of the fourth wheel acting against the leaves ofthe escape pinion, in some cases nearly one-half of the thick-ness of the leaves is worn away. This changes the depthbetween the two and…
Clocks and watches
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