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Friedrich Hempel
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14,775. Hempel, F. June 28. Sifting coal, ores, &c.-Relates to a machine for sifting coal, coke, ores, and similar materials of irregular form, in which two superposed sieves are mounted upon and driven by cranks on horizontal shafts so that' each point of the sieves describes a circle in a vertical plane and the sieves are balanced. The sieves a, a' are mounted by supports b, b<1> at each corner upon cranks c, c<1> on two parallel shafts d, connected together by bevel-gearing e. One of the shafts d is driven by a belt, as shown.
GB190614775D1906-06-281906-06-28Improvements in Riddles.
ExpiredGB190614775A
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