rights; but otherwise we can look and squint, open and close the
bankings, and tinker about till doomsday, and the watch be none the
better.


CLUB-TOOTH LEVER WITH EQUIDISTANT LOCKING FACES.

In drawing a club-tooth lever escapement with equidistant locking, we
commence, as on former occasions, by producing the vertical line _A k_,
Fig. 22, and establishing the center of the escape wheel at _A_, and
with the dividers set at 5" sweep the pitch circle _a_. On each side of
the intersection of the vertical line _A k_ with the arc _a_ we set off
thirty degrees on said arc, and through the points so established draw
the radial lines _A b_ and _A c_.

From the intersection of the radial line _A b_ with the arc _a_ lay off
three and a half degrees to the left of said intersection on the arc
_a_, and through the point so established draw the radial line _A e_.
From the intersection of the radial line _A b_ with the arc _a_ erect
the perpendicular line _f_, and at the crossing or intersection of said
line with the vertical line _A k_ establish the center of the pallet
staff, as indicated by the small circle _B_. From _B_ as a center sweep
the short arc _l_ with a 5" radius; and from the intersection of the
radial line _A b_ with the arc _a_ continue the line _f_ until it
crosses the short arc _l_, as shown at _f'_. Lay off one and a half
degrees on the arc _l_ below its intersection with the line _f'_, and
from _B_ as a center draw the line _B_ _i_ through said intersection.
From _B_ as a center, through the intersection of the radial line _A b_
and the arc _a_, sweep the arc _g_.