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Engineers studied this problem along the lines of combining wide range with speed of adjustment. The result of this study was the introduction of the idea of supporting the mainshaft on an oil-operated hydraulic jack. This idea was first incorporated in a special model of the Newhouse crusher, designated as the “Oil-Adjusted” crusher. A few of these machines were built and tested under severe operating conditions, and the lien would undoubtedly have been develop extensive had not the “quiet” period through the early 1930īs effectively checked the demand for new crushers.
We had not lost sight of the possibilities of this method of adjustment, however, and when conditions showed signs of improvement we were ready to incorporate the oil adjustment feature into an entirely new machine, a machine which was to be designed in all its proportions specifically for reduction crushing, with a scientifically proportioned crushing chamber, “quick-set” adjustment, safety release for tramp-iron protection, and high speed operation for maximum capacity at close settings. This machine, the “Type R,” was brought out early in 1938.
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