Mechanical watch

The first mechanical clock appeared in Europe around 1275, however, the name of the inventor is unknown to us. Suspended on a cord cargo spun the wheel, it was put in action the mechanism of hours, which each hour the ting. Soon, in hours came hands and dial. Which showed time.
The important detail of hours - escapement device, which limits the speed of the mechanism through step-by-step rotation of the toothed wheel. A speed controller operates a timer that ensures the desired speed of the clock.
The course of antique mechanical clocks were regulated by a balance wheel, which consisted of a bar with counterweights on both ends, which was attached to a vertical rod. The rocker swayed in front of back, its vibrations are transmitted to the speed controller, and that regulated the speed of rotation of the mechanism.