Beverly Clock

One of the most successful prototypes of a subject of science-fiction, the continuous motion machine. Scientists have long considered, and continue to ponder upon, the creation of a machine that powers itself indefinitely by somehow harnessing the ever fluctuating energy of the universe.
What you can see here in the lift foyer of the third floor of the Physics Department is an honest and functioning attempt at such a machine. The genius of the 1864 Beverly Clock is that it derives it's power from the weather, small changes in barometric pressure and temperature being registered in a vacuum chamber which then triggers a weight mechanism to 'wind' the clock. It has never been wound, since it's creator, Arthur Beverly started it in 1864, and has barely ever failed, the only times when it failed to keep time were related to mechanical problems, cleaning schedules and particularly flat weather patterns.
Swiss watchmakers Jager-LeCoultre market the 'Atmos clock', created on the same principles.
The only rival for this system is thought to be the 'unfailing battery' that has powered the Oxford Electric Bell for 176 years, but why that continues to work is not known.

Image Credit: Mysterious Snapper

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