Perpetual motion machines are devices that, once started, could theoretically remain in motion forever without adding any additional energy to them.

Perpetual motion "regenerative acceleration" returns as ReGenX in an NMG We first encountered the “regenerative acceleration” system from Thane Heins years ago.

Steorn is back, and it is still hawking its perpetual-motion machine, the Orbo. We spent several carefree days back in the summer of 2007 ridiculing the whole project, which purported to use ...

The human race has been reaching for impossible dreams of perpetual motion and free energy for just about all of recorded history. Now it’s convenient to find them all in one place.

They're normally the last thing you'd use for a motor or generator; but without more information from Steorn it's impossible to determine the significance of their use.

It sounds like the theoretical impossibility of perpetual motion, but engineers at the University of Michigan have created a pacemaker that is powered by the beating of your heart -- no batteries ...

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F.L. Minnick, a resident of the Wilson Hotel in Spokane, claimed to have produced a “perpetual motion” machine.

Let's start with a water wheel in still water with an electric generator hooked up to it. Let's say it has a ratchet wheel so it can only turn in one direction. I want to calculate the probability ...