pronounced in the
circular than in the equidistant pallet, because in the former we have
two locking circles, the larger one being for the engaging pallet, and
as an arc of a large circle does not deviate as much from a straight
line as does that of a smaller circle, it will be easily understood that
the natural difference before spoken of is only enhanced thereby. For
this reason in order to produce an _actual_ draw of 12deg., the engaging
pallet may be set at a slightly greater angle from E B in the circular
escapement; the amount depends upon the width of the pallets; the
requirements are that the recoil of the wheel will be the same on each
pallet. We must, however, repeat that one of the most important points
is to measure the draw when the fork stands against the bank, thereby
_increasing_ the draw on the engaging and _decreasing_ that of the
disengaging pallet _during_ the unlocking action, thus _naturally_
balancing one fault with another.

We will again proceed with the delineation of the escapement here
illustrated. After having drawn the locking face Q M, we draw the angle
of width of teeth of 4 1/2deg., by planting the protractor on the escape
center B. We measure the angle E B K, from the locking face of the
pallet; the line E B does not touch the locking face of the pallet at
the present time of contact with the tooth, therefore a line must be
drawn from the point of contact to the center B. We did so in our
drawing but do not illustrate it, as in a reduced engraving of this kind
it would be too close to E B and would only cause confusion. We will now
draw in the lifting angle of 3deg. for the tooth. From the tangent C A we
draw T A at the required angle; at the point of intersection of T A with
the 30deg. line E B we have the real circumference of the escape wheel. It
will only be necessary to connect the locking edge of the tooth with the
line K B, where the real or outer circle intersects it. It must be drawn
in the same manner in the circular escapement; if the tooth were drawn
up to the intersection of K B with T A, the lift would be too great, as
that point is further from the center A than the points of contact are.

If the real or outer circle of the wheel intersects both the locking
circle M N and the path O of the discharging edge at the points where
T A intersects them, then there will be _no loss_ of lift on the
engaging pallet. This is precisely how it is in the diagram; but if
there is any d