.....as a natural "proposal" (principle...outline ) , at :
http://en.wikipedia.org/wiki/File:Orbit3.gif (http://en.wikipedia.org/wiki/File:Orbit3.gif)
It's a rotating "cosmic seesaw"...we can play with gravity and inertia , if we have in mind a continuous unbalanced motion for our working devices.
Anyway , we are living inside this celestial bodies pulsatory leverage...
Try to think in the terms of pendular mechanics.
Al_ex
.....as a basic idea , is the variable leverage of two eccentered masses .
A proposal with a single eccentered mass , you can see at :
www.youtube.com/watch?v=Upp-Xr5JAg0 (http://www.youtube.com/watch?v=Upp-Xr5JAg0)
In my opinion , with a second eccentered mass ,playing the first class variable leverage , you can accomplish a successful real test...simply , if you "cut" one end-arm of the (rotating ) centered mass.
Al_ex
.....has a pattern evolution on net , formed by a series of proposals ,you can see at :
http://www.google.com/patents/US20060249955 (http://www.google.com/patents/US20060249955)
http://www.youtube.com/watch?v=kRW0ASuBrdc (http://www.youtube.com/watch?v=kRW0ASuBrdc)
http://www.youtube.com/watch?v=Upp-Xr5JAg0 (http://www.youtube.com/watch?v=Upp-Xr5JAg0)
If simplicity is the best way of perceiving what it means a gravity motor , than if we keep in mind and play /test a child-like game (a swinging or rotating seesaw...as you like) , we can develop this pattern evolution to a "practical" path.
Simply , we can play a visible and "invisible" game in the same time with gravity and inertia :variable/oscillatory leverage.
Al_ex
.....for a a natural continuous motion "Ocean Engine'', including a simplified design , including a binary self oscillating system and a resevoir , you can see at :
http://theoceanengine.blogspot.ro/2011/12/bipolar-climate-seesaw-and-deep-ocean.html (http://theoceanengine.blogspot.ro/2011/12/bipolar-climate-seesaw-and-deep-ocean.html)
For our topic , in my opinion , we can start with the same simplification : oscillatory lever+inertia storage.
Al_ex
.....or the mass-trajectory of a natural working simple machine (playing variable/oscillatory leverage... ) ,at :
http://en.wikipedia.org/wiki/File:Seasons1.svg (http://en.wikipedia.org/wiki/File:Seasons1.svg)
Al_ex
....for the time we are living , does seem something in the "shadow" ...we can proof anything.
But , there are some starting words of encouragement , at :
https://mysite.du.edu/~jcalvert/tech/machines/machines.htm#H , then "viii-Perpetual Motion" , where you can read: "...the common observation that mechanical energy does seem to disappear without trace , nourish the hope that perhaps the opposite also occurred...".
This hope can be the parent of our faith.
Al_ex
.....as we can imagine (veproject1) the optimistic future of the gravity (self) powered devices :
https://m.youtube.com/watch?v=qp5xqzGFcAQ
"In all things it is better to hope than to despair" (JW von Goethe).
Al_ex
Hi Alex,
Reminds me of this one, gravity circulation power generation:
http://www.youtube.com/watch?v=VuWbqoRyvys
Hi DTB !
Try to compare Jan's complexity , with the simplicity of :
https://m.youtube.com/watch?v=c9YLkoJz7rM
You can find this one on net , as a design (Remzi Eyupoglu's "Gravity wheel/motor") and as a test (Veproject1's "Unbalanced lever").
In my opinion , the one and the other are on the "edge" to be workable...if they use two masses only , and have in mind a "clear image/concept".
An illusion can be pleasant...but we must temper it with the reality and not to mislead our visual image.
Al_ex