Abstract: A scraper for a sugar centrifuge comprises a scraper blade mounted on an arm which is moved down into and pivoted within the centrifugal bowl, such that the edge of the scraper blade is moved against but out of contact with the bowl wall for scraping off the sugar adhering to the bowl wall. After the scraping edge, the scraper blade has an afterscraper in direct or indirect contact with the bowl wall. The afterscraper comprises in one embodiment a block whose boundary plane facing the scraping edge forms an acute angle with the tangential plane along the line of contact of the block with the bowl wall.

Abstract: An apparatus for automatically and continuously withdrawing coal from a ship's bunker by means of a screw conveyor suspended from a gantry beam transversely of the bunker in order to convey the coal towards one or both sides. The gantry beam travels on supporting beams extending in the longitudinal direction of the bunker and being movable in their turn on vertical beams by means of hydraulic devices mounted each at one end of the supporting beam and engaging the associated vertical beam. By being arranged in this manner, the screw conveyor covers the entire bunker area and can also be operated while the ship is under way at sea.

Abstract: A silo or the like for storing pulverulent, granular or lumpy material has a wall which encloses the silo storage space, a roof whose pitch substantially corresponds to the angle of repose of the material, an inlet opening in the silo roof, an outlet opening in the silo floor, and a screw conveyor suspended from a beam rotatable about the axis of the silo. The beam is inclined downwardly from the inlet opening of the silo and extends substantially parallel to the roof pitch, and the conveyor is suspended from the beam by means of wires which are adjustable independently of each other with respect to their length. The conveyor can thus be anchored close and parallel to the supporting beam when material is fed into the silo, and be disposed at a suitable angle, preferably inclined downwardly toward the center of the silo, when material is discharged from the silo.