The point on the arc _n_ where it intersects with the line _b'_ is
termed the point _b_. At the intersection of the radial line _a d'_ is
established the point _d_. We take ten and one-half degrees in the
dividers, and from the point _b_ establish the point _c_, which embraces
the arc of the escape wheel which is utilized by the pallet action.
Through the point _b_ the line _h' h_ is drawn at right angles to the
line _a b'_. The line _j j'_ is also drawn at right angles to the line
_a d'_ through the point _d_. We now have an intersection of the lines
just drawn in common with the line _a a'_ at the point _g_, said point
indicating the center of the pallet action.

The dividers are now set to embrace the space between the points _b_ and
_g_ on the line _h' h_, and the arc _f f_ is swept; which, in proof of
the accuracy of the work, intersects the arc _n_ at the point _d_. This
arc coincides with the locking faces of both pallets. To lay out the
entrance pallet, the dividers are set to five inches, and from _g_ as a
center the short arc _o o_ is swept. On this arc one degree is laid off
below the line _h' h_, and the line _g i_ drawn. The space embraced
between the lines _h_ and _i_ on the arc _f_ represents the locking face
of the entrance pallet, and the point formed at the intersection of the
line _g i_ with the arc _f_ is called the point _p_. To give the proper
lock to the face of the pallet, from the point _p_ as a center is swept
the short arc _r r_, and from its intersection with the line _a b'_
twelve degrees are laid off and the line _b s_ drawn, which defines the
locking face of the entrance pallet. From _g_ as a center is swept the
arc _c' c'_, intersecting the arc _n n_ at _c_. On this arc (_c_) is
located the inner angle of the entrance pallet. The dividers are set to
embrace the space on the arc _c'_ between the lines _g h'_ and _g k_.
With this space in the dividers one leg is set at the point _c_,