Powered by a oscillating linear weight that falls back and forth within the central shaft - transmitting the energy to the four ball bearing barrels. All part of the mechanical revolution in watchmaking where everyone is trying to reinvent the wheel - but this time with belts.Link
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.