This should help.effuno wrote: what kind of a CVT did williams f1 use in 93 (i mean pulley ,hydraulic etcd)
http://www.cke-tech.com/graphics/CVPST/cvt-only.jpg
It was a result of the collaboration with Van Doorne's Transmissie (VDT). As Scuderia_Russ said, following good testing results the CVT was banned by FIA.
Here a couple of further pics.
http://www.cke-tech.com/graphics/CVPST/CVT-test_car.jpg
http://www.cke-tech.com/graphics/CVPST/CVT-rear_end.jpg