Hopefully most people who visit this page will be well and truly familiar with Clement Figuera and his Infinite Energy Machine. For those who are not a simple web search with those terms will still find plentiful relevant information. I have been catching up on UfoPolitic's FIGUERA'S AETHER MAGNETIC FIELDS LINEAR PUMP, REVIVED topic on OverunityMachines and I took a break from that to study Figuera's patent in order to get a bit of context.
The key to it is the above drawing and some details in the text that help to explain it. The drawing is not great because it tends to obscure how the device works rather than to really elucidate it. Really, how it is built is very simple. Please examine the following image, which is a simplified and more informative model of the device than what is presented in the patent drawing above.
Figuera's patent describes a machine that can be broken down into three main assemblies: a Switch, a voltage divider, coils.
The Switch - labelled 'G' in the image - is designed to switch the input current coming in on the wire marked 'Pos' to various points along the voltage divider and depending where the current is entering the voltage divider the current is divided between the two coils marked 'N' and 'S'.
The brush is not actually shown in the patent drawing, merely indicated with a '+' but I think my analysis below is correct.
The Switch works by rotating the Brush arm so that the Brush makes contact with one contact and sometimes two contacts leading to points on the voltage divider. The brush is designed to Make Before Break (MBB) so that the circuit is always connected, either feeding current to one coil or the other or between the resistors in the voltage divider, splitting the current between the coils or either side of one of the resistors, which will effectively drop that resistor out of the circuit.
The effect of the brush rotating (whether clockwise or anticlockwise) is to sweep the current, relatively smoothly, from the N coil to the S coil and back again. This is likely to create a strong magnetic field in the N coil and that field will be presented to the Output coil (Out or y) inducing a current in it due to the changing magnetic field. As the current is swept towards the S coil the Output coil will see a changing magnetic field, just as if a magnet is moved away or towards a coil, as happens in a generator.
When a magnetic field is permitted to run in a material an opposite magnetic field is created in the material, which opposes the field that induced it. In a normal generator the motive power is used to overcome that reactive field. That effect is referred to as Lenz' Law.
I believe the principle that Figuera relies on for his device is that he rotates his magnetic field (in fact, as noted above, Figuera doesn't rotate his field as is done in a conventional generator, rather he reciprocates it, making one pole stronger and then the other) with negligible effort, since it is merely a case of rotating the brush, and any field induced in the Output coil has nothing for the Lenz force to act on.
It looks pretty simple to build and test but a great many people have tried and failed.
I'm not working on a Figuera build at the moment. I only stopped off to take a look at it while waiting for some filament to arrive so I can carry on building my SFMM device.