M N
; had we added this amount to the lifting angle
V′ A V
of the engaging pallet, the result would have been that the discharging edge
O
would be over 1° below its present location, thus showing that by the time the lift on the engaging pallet had been completed, the locking corner
N
of the disengaging pallet would be locked at an angle of 2¾° instead of only 1¾°. Many watches contain precisely this fault. If we wish to make a draft showing the pallets at any desired position, at the center of motion for instance, with the fork standing on the line of centers, we would proceed in the following manner: 10¼° being the total motion, one-half would equal 5⅛°; as the total lock equals 1¾°, we deduct this amount from it which leaves 5⅛ − 1¾ = 3⅜°, which is the angle at which the locking corner
M
should be shown above the tangent