Check out the hypnotic majesty of this piece by Jennifer Townley titled Bussola.
From the artist's web site:
'Bussola' is named after the Italian word for 'compass', as this sculpture is inspired on one of Leonardo da Vinci's designs for such a drawing tool dating from 1514. The three-dimensional machine is built up from a collection of identical instruments that work in the same way as the original compass.
Here is where you can see more mechanical sculptures by Jennifer Townley.
[ Thanks Jim! ]