in the disengaging pallets when unlocked. This is a question of some importance; it is easy enough to represent the 12° from the 30° angles when locked; we must be certain that they would occupy exactly that position and yet show them unlocked; we shall take pains to do so. In due time we shall show that there is no appreciable loss of lift on the engaging pallet in the escapement illustrated; the angle
T A V
therefore shows the total lift; we have not shown the corresponding angles on the disengaging side because the angles are somewhat different, but the total lift is still the same.
G H
represents the primitive circle of the escape wheel, and
X Z
that of the real, while
M N
represents the circular course which the locking corners of the pallets take in an equidistant escapement. At a convenient position we will construct the circle
C C′ D