Abstract: The apparatus, which serves for the optical inspection of workpieces, comprises a transport device driven by a drive unit, which transport device is supplied with workpieces delivered by a loading device, which workpieces are transported by the transport device to at least one inspection position, where an optical inspection is performed, and further to at least one discharge position, where the inspected workpieces are selectively extractable by a discharge device. According to the invention, a plurality of transparent receiving bodies are firmly mounted or rotatably supported on the transport device, each of the receiving bodies comprising a recess, into which the workpieces can be inserted individually or in groups, and wherein an inspection radiation can be guided through each receiving body in order to image the held workpieces.

Abstract: A method for processing polycrystalline silicon workpieces to form size distributions of polycrystalline silicon pieces suitable for use in a Czochralski-type process includes: (1) preparing a polycrystalline silicon workpiece by a chemical vapor deposition process; (2) fracturing the polycrystalline silicon workpiece into a mixture of polycrystalline silicon pieces, where the polycrystalline silicon pieces have varying sizes; and (3) sorting the mixture of polycrystalline silicon pieces into at least two size distributions. Step (2) may be carried out by a thermal shock process. Step (3) may be carried out using a rotary indent classifier.

Abstract: An apparatus for detecting and removing abnormal balls among a large number of balls, most of which are good separate balls, comprising (a) a rotatable, cylindrical, ball-holding means comprising a large number of ball-receiving cavities each receiving one ball; (b) a means for detecting part of a ball projecting from each ball-receiving cavity in a detection region substantially at a top of the cylindrical ball-holding means; (c) a ball-supplying means disposed on the cylindrical ball-holding means upstream of the detection region; (d) an abnormal ball-removing means disposed downstream of the detection region on the cylindrical ball-holding means; (e) a means for collecting good separate balls downstream of the detection region; and (f) a means for carrying out the determination of abnormal balls based on the detection information of projecting portions of the balls obtained by the projecting ball-detecting means.

Abstract: Apparatus for classifying elongated tablets, pills and similar objects according to their lengths has a rotary wheel-shaped conveyor with a peripheral groove which receives a succession of objects and advances them past a testing station where the objects are monitored by an optical reflection type detector which generates signals denoting the lengths of the objects. Such signals are used to expel by jets of compressed air those objects whose lengths are unsatisfactory ahead of the location where satisfactory objects leave the groove by gravity. The objects which approach and move past the testing station are attracted to the conveyor by suction.

Abstract: A method of sorting rivets or similarly shaped articles, and apparatus therefor. Rivets are directed along a track to a notch where they are supported in a shank-down attitude against a rotating gauging wheel having a plurality of gauging holes conforming generally to the shape of the shank. The wheel is rotated so the gauging holes move upwardly with respect to the shanks while grooves in the periphery of the wheel guide the shanks toward the holes. Rivets with a uniform shank will settle into the holes so their heads are below the periphery, while rivets with bent, gouged, burred or oversized shanks will not settle fully into the holes. A rivet kicker timed to the rotation of the wheel ejects rivets not fully settled in the holes. Fully settled rivets are blown out of the gauging holes into a tube where they are conveyed by air towards a riveting machine.