Abstract: A hog feeder comprises a generally overhead horizontal conveyor for transporting feed to a series of drop tubes which contain centerless augers for delivering feed downwardly through the tubes to feed pans therebelow. Attached to the auger at its lower end are elements for engagement by the hogs during feeding to drive the centerless auger and thereby positively deliver feed to the feed pans. The system further includes a limit switch in the down tube of a control feeder unit located above the pan and below the horizontal conveyor for ensuring that there is always feed in the various other feeder units attached to the overhead conveyor.

Abstract: A universal traveler is provided for ring spinning machines, the traveler being structured to permit repositioning of the traveler on the ring after a portion of the traveler has been worn.

Abstract: A control roll is provided for use in the processing of staple fibers and comprises a plurality of radially and circumferentially spaced projections on the surface of a roll. The control roll is placed in the path of a strand of fibers and the individual fibers in the strand are physically oriented into parallel relation with one another and maintained in that relation until the fibers are processed as by drawing and twisting.