[Open-bio-announce] rcles struck from the pal

[Yonemori]

E lift the tooth moves faster along the engaging lifting plane than on
the disengaging; on pallets 2 and 3 this difference is quite large;
towards the latter part of the lift the action becomes quicker on the
disengaging pallet and slower on the engaging. To obviate this
difficulty some fine watches, notably those of A. Lange & Sons, have
convex lifting planes on the engaging and concave on the disengaging
pallets; the lifting planes on the teeth are also curved. See Fig. 11.
This is decidedly an ingenious arrangement, and is in strict accordance
with scientific investigation. We should see many fine watches made with
such escapements if the means for producing them could fully satisfy the
requirements of the scientific principles involved. [Illustration: Fig.
9.] The distribution of the lift on tooth and pallet is a very importan
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