not in-depth, but not superficial link: https://en.wikipedia.org/wiki/Escapement https://en.wikipedia.org/wiki/Escapement https://en.wikipedia.org/wiki/Duplex

not in-depth, but not superficial link: https://en.wikipedia.org/wiki/Escapement https://en.wikipedia.org/wiki/Escapement https://en.wikipedia.org/wiki/Duplex_escapement https://en.wikipedia.org/wiki/Duplex_escapement physics of pendulums and other oscillators underlie the tech. https://en.wikipedia.org/wiki/Balance_wheel https://en.wikipedia.org/wiki/Balance_wheel https://en.wikipedia.org/wiki/Torsion_spring https://en.wikipedia.org/wiki/Torsion_spring