179395 ⎘
Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically driven by electromagnetic means constructional details of the pawl or the ratched-wheel pawl and ratched-wheel being magnetically coupled
Regulating system for a mechanical watch
#2Contactless cylinder escapement
#3Interaction between two timepiece components
#4OPTIMIZED ESCAPEMENT
#5Regulating system for a mechanical watch
#6Regulating device
#7Optimized escapement