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_,
measuring down on the arc _c'_ and establishing the point _t_. The
points _p_ and _t_ are then connected, and thus the impulse face of the
entrance pallet _B_ is defined. From the point _t_ is drawn the line
_t t'_, parallel to the line _b s_, thus defining the inner face of the
entrance pallet.

DELINEATING THE EXIT PALLET.

To delineate the exit pallet, sweep the short arc _u u_ (from _g_ as a
center) with the dividers set at five inches, and from the intersection
of this arc with the line _g j'_ set off eight and one-half degrees and
draw the line _g l_. At one degree below this line is drawn the line _g m_.
The space on the arc _f_ between these lines defines the locking
face of the exit pallet. The point where the line _g m_ intersects the
arc _f_ is named the point _x_. From the point _x_ is erected the line
_x w_, perpendicular to the line _g m_. From _x_ as a center, and with
the dividers set at five inches, the short arc _y y_ is swept, and on
this arc are laid off twelve degrees, and the line _x z_ is drawn, which
line defines the locking face of the exit pallet.

Next is taken ten and one-half degrees from the brass degree-scale, and
from the point _d_ on the arc _n_ the space named is laid off, and thus
is established the point _v_; and from _g_ as a center is swept the arc
_v' v'_ through the point _v_. It will be evident on a little thought,
that if the tooth _A'_ impelled the exit pallet to the position shown,
the outer angle of the pallet must extend down to the point _v_, on the
arc _v' v'_; consequently, we define the impulse face of this pallet by
drawing a line from point _x_ to _v_. To define the outer face of the
exit pallet, we draw the line _v e_ parallel to the line _x z_.

There are no set rules for drawing the general form of the pallet arms,
only to be governed by and conforming to about what we would deem
appropriate, and to accord with a sense of proportion an