Improvements in and relating to screens or riddles for use in the classification of coal, ores, minerals and the like

摘要

286,544. Hunter, S. July 22. 1927. Reciprocating screens a, a1 for coal, ores, &c. are suspended by members c formed of metal strands, preferably of flat cross-section. In the construction shown in Fig. 4, a central band of circular-sectioned wires p is wound round with -one or more outer layers of wires n, o. The wires may be of flat cross section as shown in Fig. 7. The ends l of the supporting members are expanded and clamped between bars h, k on the supporting frame and screen frame, the strands being spread apart and the spaces filled with white metal. The reciprocating mechanism comprises eccentrics e and connecting rods d.