A movement essentially consists of the following three functional groups
The power source
supplies the movement with energy, so that it moves.
The gear train
(transmission) serves for the revolutions increase (1 revolution per hour, per minute) and thus for the force reduction.
restrains the operational sequence of the train.
Further function groups are the winding mechanism, the motion work and the pointer servo unit.
Additional functions Depending on the additional function of the movement or the watch there are more function units integrated. These include
A movement with alarm
function generates a tone at a previously set time.
announces the time with acoustic signals.
shows different informations depending on the date.
movement allows the measurement of time intervals.
winding converts the kinetic energy of the wearer of the watch into mechanical energy to drive of the movement.