(10 active u /2 dual-axial u)

(1 u / 1 stem / 1 cycle)

EFFICIENCY: 5 ( 5 Ve / 1 VE )

theoretically the high number of
active and uni-directional units
plus the dual-axial nature of all
fixed elements results in a design
that transcends other notions of
machine. Emphasis should be
placed on low-weight high-tension
levers that provide little
resistance when successively


A Perpetual Motion Machine Concept Using a
Rolling Cone Set on a Circular Pivoting Track

Taken from my blog entry on the subject:

We all know that if you push a coffee cup it rolls in circles. It seemed to me that so long
as that rolling could be used to provide a constant slope, the rolling might continue and
continue. The result is a new perpetual motion concept: The Tilt-Motor. (Should I call it
God's Rolling Pin?)
Click here to skip to the diagrams.

It consists of a weighted cone shaped (approximately) like a coffee cup that may be
made to spin along a track around a vertical axis. Along the outside perimeter of the
track are eight pressure plates, each attached to the long end of a lever.

The short end of each lever has a "wicket" attached, which allows one of the earlier
levers to pass through without being obstructed. When the long end of the lever is
activated by the weight of the rolling cone, leverage acts
underneath the track through the wicket positioned 90 degrees behind the cone. Since
the track is made in such a way that it pivots downward wherever the cone is rolling,
the point 90 degrees behind the cone is always sloped towards the cone. By pushing
upward at precisely that point, it may be possible to raise that portion of the track, thus
extending the range of the

The intention then is to keep the cone rolling around the track, since it is continually
activating a pressure plate that shifts the tilt towards a point just ahead of the cone.
When it rolls to that point it would then theoretically activate another pressure plate,
causing the tilt to shift once more. The system is efficient because the entire force
utilized is the weight of the cone,which is otherwise supported by the track. The weight
contributes to leverage which acts not directly underneath the cone, but 90 degrees
behind it, a point that is much easier to lift. Since very little slope is necessary to keep a
round thing rolling, the leverage may be sufficient to create continuous motion.

Because the keys or pressure plates are only weighted when the cone rolls over them
(since the track is not positioned directly over them, but rather over the wickets on the
other end of the levers) the cone meets little resistance in one direction--simply having to
lift the non-operating keys--yet considerable resistance in the other direction from the
leverage acting through the activated pressure plate.

Note that the inner track is separate from the pressure plates, and even from the wickets
(just above them), so that it is actually unnecessary to adjust the sizes of the wickets to
accommodate lean and skew. It could be built in such a way that the lowest point of
swivel for the track allows the current pressure plate to be fully activated, with the
highest point of the corresponding wicket--when the lever is activated--being slightly
higher than the height of the track at 90 degrees behind the activated pressure plate.

This actually means that the point of the track 90 degrees ahead of the activated
pressure plate is lowest, since the wicket opposite that point is the highest. In this way
the rolling cone is always approximately in the middle of the slope, according to theory.
Since theoretically the slope begins 90 degree
behind the cone, there is no need for the cone to ever reach the lowest point of the
track, so long as the current location is sloped downward.

The best way to implement this is to raise the average height of the track to the extent
that the cone is rolling at the point when it fully depresses the pressure plate. If that
pressure is sufficient to shift the point of slope, then the process might continue.

This might be possible because the size of the rolling cone permits the keys to be raised
above the lowest point of the track. If the transition from one pressure plate "step" to
another is not completely smooth, then size of the outer end of the cone would
accommodate for this, the way large wheels can handle small bumps.

With 66% levers as depicted, there is a 1/2 transfer of distance, so that 2 inches of
depressed pressure plate would produce 1 inch of upward tilt 90 degrees behind the
cone. However, as noted earlier, not much tilt may be necessary to move a rolling cone.

Tilt Motor Diagrams           

PM Theory



Fluid Lever

Curving Rail

Motive Mass

Repeat Lever

* Diagrams
* Components
* Experiments
* Videos



Bezel Weight


Conv. Wheel


Escher Mach

Spin Top

Apollo Device

Spiral Device

Early Failures


PM Types
Questions, comments, or other
inquiries may be directed to:
NATHAN COPPEDGE--Perpetual Motion Concepts


More on my concept of
Volitional math at

white elephant
A coffee cup was the critical
paroxysm of this design, concieved
as critical on Oct 29, 2006 at Koffee
cafe in New Haven, an
industrial-looking setting
Perpetual Motion Book