Some cone CVT designs use two rollers.[23][24] In 1903, William Evans and Paul Knauf applied for your patent on a repeatedly variable transmission making use of two parallel conical rollers pointing in reverse Instructions and related by belts that could be slid alongside the cones to range the transmission ratio. https://gearboxcvt64296.gynoblog.com/31947781/getting-my-gearbox-cvt-to-work