I wish to jump in here on Blake’s side for a moment,
Free Energy, given the current state of the Laws of Thermodynamics (specifically the second law) is impossible. Now, there may be situations (for instance at a real absolute zero) where these laws need to be added to or re-thought (vis a vis Maxwell or Plank).
That having been said, in this day and age, I would consider perpetual motion machines (not even free energy, just zero entropy) to have less scientific value than the theory of Caloric Fluid, The Plum Pudding model of the atom or the Luminiferous Ether.
As to the statement that there have been no inventions in the past 60 years:
1946: 2006 - 60 years
Before the Apollo Missions, Satellites, Semi-Conductors / Integrated Circuits, Shape Memory Alloys, High Temperature Super-Conductors, Lexan/Lucite/Plexiglas/Perspex and a myriad of other plastics, NMR / MRI, and I am sure a vast, vast number of other things which I cannot name at this moment.
Furthermore, these EM field / spinning disc based free energy systems have been thoroughly debunked and rest in science along with the “Tesla” free energy myths and the geo-centric theory of the universe (which at least sound more convincing).
Suffice it to say, that there are many other areas of physics which have not been well documented – a unified theory of gravitation, for example – which might, if one is wildly optimistic, even hold some of the answers to the questions asked by these free energy type apparatuses.
P.S. While I could not find a citation for the following, I am pretty sure it is correct:
The US Patent Office no longer requires working demonstrations of anything EXCEPT zero or negative entropy schemes.