What are spring-driven clocks?

A spring-driven clock is like a toy car that keeps moving on its own after you wind it up.

Imagine you have a spring, think of it as a tight coil inside the clock, just like the coiled string in a slinky. When you turn the key or pull the winding knob, you're making that spring tighten and store energy, like stretching a rubber band to its limit. Once you let go, the spring wants to return to its normal shape, it pushes back with all that stored energy.

That push makes the gears inside the clock move, just like how your toy car moves when you wind it up. The gears then turn the hands on the clock face, showing the time. It’s like having a tiny robot inside the clock that keeps ticking away because of that spring's stored energy.

Every time the clock shows a new hour or minute, some parts inside the clock gently slow down, just like how you might get tired after running around. But the spring still has more energy to give, so it keeps pushing the gears forward, making sure the clock doesn’t stop until the spring is all unwound.