Abstract: A chip sampling device comprising a sampling probe including an outer rotatable tube having an inner tube positioned therein. The upper end of the inner tube is in communication with a source of vacuum so that chips will be drawn into the lower end of the inner tube. The lower end of the inner tube is provided with serrations provided at the lower end thereof while the lower end of the outer tube is provided with serrations and inwardly extending fingers. The rotation of the outer tube and the action of the various serrations and fingers prevents the chips from plugging the lower end of the outer tube or from plugging the lower end of the inner tube.

Abstract: A self-cleaning en-masse conveyor comprising an elongated conveyor housing having a removable bottom panel which defines an arc of approximately 90.degree.. Vertically disposed wall sections extend upwardly from the upper edges of the bottom panel and have a lid or cover extending across the upper ends thereof. A conveyor chain is mounted in the conveyor and includes a plurality of flat flights positioned thereon which have a rounded edge which conforms in shape to the cross-section of the bottom panel.