Lever escapement. The anchor or piece, B, which carries the pallets, is attached to lever, E, C, at one end of which is a notch, E. On a disk secured on the arbor of balance is fixed a small pin which enters the notch at the middle of each vibration, causing the pallet to enter in and retire from between the teeth of escape-wheel The wheel gives an impulse to each of the pallets alternately as it leaves a tooth, and the lever gives impulse to the balance-wheel in opposite directions alternately.