Magic gears

[Magical Realist]

How do they work?

http://www.youtube.com/watch?v=qGAnmRb66s0

 

[billvon]

How do they work?

The video explains it. Note that when the two non-involute gears are meshing they do not transfer torque like normal gears; they transfer it via a tangential force caused by the sloped faces of the respective gears. (In other words, the force does not transfer directly; a torque is transferred to a downwards or upwards force, which is then translated into the opposite torque on the other gear.)

 

[Magical Realist]

The video explains it. Note that when the two non-involute gears are meshing they do not transfer torque like normal gears; they transfer it via a tangential force caused by the sloped faces of the respective gears. (In other words, the force does not transfer directly; a torque is transferred to a downwards or upwards force, which is then translated into the opposite torque on the other gear.)

I didn't get the video's "rope" explanation. Your's makes more sense. Tks..