This is an application of ellipse mechanism on a sphere and can be seen as a kinetic art sculpture.
Input is the green slider rotating regularly.
Output: the sphere rotating around its center point, not center axis.
The conrod is stationary. Angle between its revolution joints is 120 deg.
The sliders moves in two 90 deg. crossed grooves.
The sphere can be of other material: glass, plastic, stone, wood.