Abstract: A hydraulically, vacuumatically controlled infinitely variable speed drive transmission connecting an input shaft to an output shaft, comprising a plurality of sets of adhesion rollers mounted radially of the input and output shafts in diammetrically opposed relation to one another. The adhesion rollers are movable radially of input and output shafts under centrifugal force imparted thereto by the rotation of the aforesaid shafts. A pair of self-adjusting, floating disks are mounted to either side of said adhesion rollers and are engageable with said rollers at varying radial distances of the rollers from the axis of the input and output shafts whereby to vary the rate of rotation of said disks. The transmission further includes a planetary gear arrangement for coupling the input shaft to the output shaft and which is responsive to variations in the rate of rotation of the disks to cause the speed ratio between the input and output shafts to correspondingly vary.

Abstract: Apparatus for size-grading elongated objects of differing diameters, such as green beans or the like, comprises concentrically arranged inner and outer hollow rotatable slotted drums, with the outer drum having a greater number of axially extending circumferentially spaced apart slots therein than the inner drum; drive mechanisms for rotating both drums in the same direction but at different relative speeds, whereby the slots in the inner and outer drums overlap in different relationships and cooperate so as to define entry slots of different widths at different peripheral positions around the outer drum; an object feeding chute outside the outer drum for directing objects to be size-graded to an entry slot of desired width; a conveyor within the inner drum for receiving size-graded objects which have fallen through the selected entry slot, and a collector on the outside of the outer drum for collecting those objects which have not fallen through the selected entry slot.