Hetzel, Frederic Valerius, 1870- · New York, J. Wiley and Sons · leaf 28
, N. J. It had over 50 belt conveyors,ranging from 20 inches to 30 inches wide and up to 500 feet long. The IMPROVEMENTS BY THOMAS ROBINS 11 first idlers used there about 1891 were heavy cast-iron spool idlers, butthese were failures because in order to get the greatest capacity from thebelts, the… … FIG. 28.—Concentrators Mounted on a Stand with Carrying Pulleys. out rapidly. When the plant was rebuilt in 1893 idlers of the type shown inFig. 29 replaced the spool idlers; the new idlers were practically the sameas the flat rolls with concentrators used on grain conveyors. The chief trouble at…
Conveying machinery · Hoisting machinery · Belts and belting
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