ABSTRACT
Infinite-variable-Speed drives have been the subject of investigation for many years, and many ingenious devices have emerged. They all rely on some form of force closure if they are to be infinite variable, that is, have any accurate speed ratio. In this Infinite-variable-Speed drive the circular disc is in contact with a steel friction roller which can slide on the output shaft but which rotates with it by means of a key and keyway. If the roller is at the center of the circular disc, then the output motion is zero, but as the roller is moved farther away from the center, the speed of the output shaft increases proportionately. Because pure rolling cannot take place between the roller and the disc—due to varying speeds along the contact line of the disc versus the constant circumferential speed of the roller—the roller is often made spherical and often is covered with a material that increases friction and wear resistance.
