a mechanism consisting in general of an escape wheel and an anchor,used especially in timepieces to control movement of the wheel and to provide periodic energy impulses to a pendulum or balance.

• 通常由一个擒纵轮和一个支持点组成的机械，特别是在钟表中被用来控制齿轮的运作并提供周期性的推动给钟摆或摆轮