Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics (1892)
Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 195
n rock, is provided. A guide-wheel is tilted, whicli supports the sag of the l)ucket-chain when wear has lakiMi place.and re-lieves the strain on the licarings anil pins. With this guide-wheel or relie\ ing-drnm, t hemaximum dredging depth of thi macliin(> is 40 ft.: without it more than ;50 ft.… … DREDGES AND EXCAVATORS. 181 round pitch-wheels connected to the upper tumbler. If the buckets catch on solid rock, thefriction-gear slips until the undue strain is relieved.
Mechanical engineering
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