How To Use Perpetual motion machine In A Sentence

You would need a perpetual motion machine to do it! Times, Sunday Times
Building a perpetual motion machine would have been easier. Times, Sunday Times
Just when this perpetual motion machine will run down is anyone's guess. Times, Sunday Times
Aggreko looks increasingly like some sort of implausible perpetual motion machine. Times, Sunday Times
In Thermodynamics, it is called a "Perpetual Motion Machine", one that delivers useful work output, which exceeds the intrinsic value (known as "exergy") of its energy input. China Stocks News and Analysis from Seeking Alpha

Finally there are Class III impossibilities, which seem to violate all the known laws of physics, such as precognition and perpetual motion machines. Madison.com - top
Physicist Donald Simanek talked about perpetual motion machines and other unworkable devices.
a perpetual motion machine would have to be frictionless
He is adamant that this is not a perpetual motion machine, and does not violate the law of conservation of momentum because different reference frames apply to the drive and the waves within it.
Beside the central image of the city in the east wall, to which we will return momentarily, the heptagonal figure offers a perpetual motion machine by which to contemplate the interconnection of worldly and divine wisdom. Architecture and Memory: The Renaissance Studioli of Federico da Montefeltro
It really does look like a perpetual motion machine, doesn't it? Times, Sunday Times
If you take on smaller clients you might even get board games, household gadgets and perpetual motion machines.
Put them together, and you have a perpetual motion machine. THE STRATEGY MACHINE