Most of the above examples obtain their energy from something already in motion and simply draw their energy needs from it. Wind and water; Bessler’s wheel drew its energy from something in motion too.....weights, falling weights responding to gravity.
I think that no PM machine has revealed itself, other than Bessler’s, because these other kinds of machine were available and more obviously capable of being designed to make use of whatever medium the builders had in mind. Bessler said that the reason he was successful was that he devoted so much more time and effort in finding the correct principle than anyone else had ever been able do.
Helmholtz declared that Perpetual Motion machine’s were impossible because no one had ever built one. This is a perfect example of circuitous reasoning and perhaps a literary example of perpetual motion.
Question - why has no one ever built a perpetual motion machine?
Answer- because Helmholtz says they’re impossible.
Question - why are they impossible?
Answer - because no one has ever built one.
Repeat ad infinitum!