How to Make a Grasshopper Escapement

Anchor the toothed gear to the clock axle so that it can rotate clockwise and, thus, turn the clock hands.

Attach the connecting arm to the pendulum's pivot point. This links the movement of the swinging pendulum to the escapement mechanism.

Mount the large pallet arm to the left side of the connecting arm so that the arm's tooth can enter and exit the teeth on the left side of the gear. Connect one end of the spring to the pallet arm and the other to the nearby body of the clock. The spring will "bounce" the arm back and forth when the connecting arm rises and falls as the clock runs, maintaining the connecting arm's motion.

Mount the small pallet arm to the right side of the connecting arm so its tooth can enter and exit the teeth on the right side of the gear. Ensure that, once the pallet arms are mounted, the connecting arm sits centered on the pendulum pivot. When the clock runs, each end of the connecting arm will rise and fall in turn, moving the appropriate pallet arm so it meshes and unmeshes from the main gear. As the arms move back and forth, the gear is allowed to turn, which impels the clock hands forward.