These early mechanical clocks worked by using a lever that pivoted and meshed with a toothed wheel at certain intervals. 這些早期的機械鐘錶的工作,通過使用槓桿,心點和嚙合與齒輪,在某些時間間隔。
A toothed rack was commonly adopted for the automatic screw thread rotational unloading. 自動旋轉脫螺紋一般採用齒輪齒條機構或液壓齒輪機構。