EXIT

In the swiss lever escapement, the exit designates the longer of the two arms of the pallets (lever) and the pallet stone it carries. The exit pallet stone is the one a tooth of the escape wheel meets second, after the entry pallet stone, depending on the wheel’s direction of rotation. At both exit and entry, the pallet stone first receives the tooth on its resting plane (rest phase), then on its impulse plane (phase during which energy is transmitted to the lever). The geometry, inclination, and regulation / Adjustment of the entry and exit pallet stones determine the proper functioning of the escapement: rest, unlocking (drop angle), drop (impact), and Impulse must be balanced between the two. The entry/exit distinction is therefore fundamental to describing and regulating the escapement, the component that distributes energy to the oscillator.