179391 ⎘
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
Sub-classes:METHOD FOR DETERMINING A REFERENCE VALUE AND METHOD FOR SETTING A REFERENCE VALUE
#2Contactless cylinder escapement
#3Mechanical timepiece movement provided with a feedback system for the movement
#4Combined resonator with improved isochronism