An electric motor drives a segment of a worm wheel via a worm. The worm wheel presses the release pin forwards, thus separating the flow of power in the clutch. The large tensioning forces to separate the clutch are taken over by a strong spring, which means that the electric motor only supplies the torque to overcome the friction. A button can be used to turn the electric motor and to demonstrate the release process. The installed plane of Plexiglas means that everything can be seen easily.