Εδω βαζω μια περιληψη του τι ειναι escapement και οποιος θελει να διαβασει ολο το αρθο ειναι στο λινκ απο κατω....
In mechanical watches and clocks, an escapement is a device that (1) transfers energy to the timekeeping element and (2) enables counting the number of oscillations of the timekeeping element. It is the source of the "ticking" sound in watches and clocks.
An escapement transfers energy to the clock's timekeeping element (usually a pendulum or balance wheel) to make up the energy lost during a cycle. Without the energy transfer, the oscillation would cease. The escapement may take the energy from a coiled spring (e.g., in a wristwatch) or a suspended weight (e.g., in a cuckoo or grandfather clock). The escapement also permits each cycle of the timekeeping element to be counted. During each cycle, the escapement permits a gear train to advance or "escape" slightly. The periodic advancement results in moving the timepiece's hands forward at a steady rate.
With each swing of the pendulum, one of its arms releases one tooth of a gear, making it change from a "locked" state to a "drive" state for a short period that ends when another tooth on the gear strikes the opposite arm of the pendulum, which locks the gear again. It is this periodic release of energy and rapid stopping that makes a clock "tick;" it is the sound of the gear train suddenly stopping when the escapement locks again.
