Definition

Perpetual motion machines are machines that produce an unlimited supply of energy, or just never stop. Inventors have tried for centuries to find a working perpetual motion machine, but all have failed, sometimes producing novel ideas, though. It can be shown using the First (conservation of energy) and Second (entropy can never decrease) )Laws of Thermodynamics that any perpetual motion machine is impossible, even though people still try in vain to find them.

Most perpetual motion machines are based on a simple machine, the overbalanced wheel, which was invented during or before the Middle Ages. The idea is that the weighted rods are on hinges so that they stay close to the wheel while going up, and stick out when going down on the wheel, so that the right side will always have more weight, and the left side will always have less, and so the wheel, once started, should never stop.

Overbalanced wheel (Da Vinci)

The classic overbalanced wheel, as designed by French Architect Villiard De Honnecourt in about 1235, and studied extensively by Leonardo Da Vinci in the late 1400's. The overbalanced wheel was thought that the weights on the right side would turn the wheel because of the longer lever arm.

(Unknown)

The idea is that the weights rolling in the compartments between the felloe and the rim of the wheel will be so comfort themselves that the moment about the centre of those on the descending side exceeds the moment of those on the ascending side.

F.G. Woodward machine

F.G. Woodward proposed a hoop wheel supported by two rollers. This is about as simple a design as you can imagine. Since the wheel always has more weight to the left ot the rolers, that side should move down. So it will rotate forever.

Perpetual train

Double cone weight will roll uphill on a diverging pair of ways has been taken by a perpetual motionist as the basis for a self-moving train. Wheels are like triangles (Patented in 1829)

Self-flowing flask (Robert Boyle ; 1627 - 1691)

The larger weight on the left forces water down and around the narrow neck where the weight is less, and then it flows out the orifice at the top to replenish the water in the flask.

It doesn't work with water, apple juice or milk.

It works with coke and with beer.

All

I hope you liked this :) And I also hope you have learned something more! :P

Here you've got all perpetual motion machines.