American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 281
to pass behind the heel of the tooth fully andclearly. In this position the point, 1, of thetooth is just entering into lock, while thesi^nie tooth in Fig. 2 is seen with half the im-pulse given. In Fig. 3 we have just the posi- … tion of the escapement, with the spring in re-pose, ready for the entering impulse at h.Fig. 4 is adverted to further on in the article,
Clocks and watches
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