Hood, Grant · Kansas City, Mo. : Kansas City Jeweler and Optician · leaf 148
allets would have the 140 THE LEVER ESCAPEMENT. same angular movement, and as we can not change either theimpulse face of the tooth or that of the pallet (they beingpreviously made), the extra amount of motion would increasethe amount of lock, a very bad defect, as the extra force usedin unlocking… … Fig. 7. sary, so much the better, but we must allow some for theside shake of the pivots in the jewels and we often notice aslight irregularity in the teeth of the escape wheel. Thewheels when made are supposed to be true. Many a wheelthat is true in the round, has been poorly fitted to the…
Clocks and watches
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