COVE

The Verge and Foliet are the first escapements to be used to construct the first mechanical clocks. Using a notched wheel and a rod wih two plates, the rotational motion of the wheel can be controlled and regulated into small ticks. These escapements were used in all clocks until the pendulum was introduced, and da Vinci used these mechanisms in his own clockwork.

Da Vinci drew and developed many components of clocks, and some designs of entire clocks. These include a variety of gears and escapements, a very accurate three-dial clock for his time, and an alarm clock.

The first clock that utilizes the pendulum is attributed to Huygens in 1656. This increased the accuracy of clocks from 15 minutes per day to 15 secinds per day. This led to the development of the 'seconds pendulum' which became a standard 0.994-meter long pendulum used in all quality clocks.