The familiar tick-tock of wall clocks originates from the escapement mechanism, which controls gear movement in precise steps ...

THE most accurate timekeepers of to - day are divided into two classes, depending on whether the restoring force of the oscillator is gravity, as in pendulum clocks, or elasticity, as in quartz ...

The tick-tick sound comes from the movement of gears and parts inside the clock. In mechanical clocks, a part called the ...