An Analysis of the Lever Escapement

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Excerpt from An Analysis of the Lever Escapement: A Lecture Delivered Before the Canadian Watchmakers' and Retail Jewelers' AssociationPrimitive or Geometrical! Diameter.-in the ratchet tooth or English wheel, the primitive and real diameter are equal, in the club tooth wheel it means across the locking corners of the teeth, in sucha Wheel, therefore, the primitive is less than the real diameter by the height of two impulse planes.Lock equals the depth of locking, measured from the locking corner of the pallet at the moment the drop has occurred.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.