A/h

Semioscillations of the balance per hour.

Amplitude (semi oscillation)

Amplitude of the balance

Automatic Winding

In a watch with automatic winding, the centrifugal and gravitational forces are used as an energy source. A semicircular weight called the rotoror balance weight winds the spring through the arm movements of the person wearing the watch. As an automatic watch is continuously being wound, the tension spring has a sliding clutch instead of an end hook. When the watch has been wound completely, the spring descends and overstraining is circumvented.