ELI5, How does a mechanical watch continue to keep time as it’s winding?

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As I understand it, the winding of the watch adds tension to a spring that exerts force in the opposite direction of the wind to make the watch tick. The thing I can’t figure out here, is how while adding tension to the spring, it’s able to unwind in the opposite direction. I’ve spent the last fifteen minutes looking into this and every “how do watches work” video I can find conveniently skips over this part. Thanks in advance.

In: Engineering

2 Answers

Anonymous 0 Comments

The outside of the spring is connected to a gear that’s driving the gear train. The inside of the spring is connected to a ratchet that winds it from the inside as the outside unwinds.

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