While reading this thread, I was reminded of an
electric/spring driven clock that I used to have.
It was a junker, picked out of the garbage
at curbside.
It was an early version of a battery-powered
electric clock. Here is how it worked:
It took (2) "D" sized flashlight batteries.
It had a little DC motor inside that was of about the same type commonly used for toy
cars and such.
The clockworks ran on spring power, but it
was a very short spring, it would only run
the clock for a few minutes at a time. At
the end of this time period, a set of contacts
would run the motor and rewind the spring.
It kept pretty decent time, and the batteries
would last about a year. It finally died.
But there is an example of a spring powered
works that had a winding mechanism to keep it
going.
(only until the batteries were used up)
There is no such thing as "free energy".
When ever you hear that term, or anything like
it, know that you are being lied to and scammed.
Even wind and solar power uses an available
source of external energy.
Thermodynamics: It's not just a good
idea, It's The Law!
Chuck