I found a design

similar to some of my designs. Although I admit, I usually try to find a way around the entropy problem. This device apparently depends on perfect proportions. But at least someone thought of it.

Here is the source link: http://cleantechnica.com/2009/02/09/2-stage-oscillators-and-the-quest-for-free-energy/

Photos of Recent Experiments with Perpetual Motion

IMAGES

VIDEO:

If the marble continued to the left, it would prove perpetual motion, assuming the contact is level on average. This might be possible with the momentum from the applied leverage (the beginning and end altitudes are about the same because of the upwards slope).