Show JEFFREY SINGLE ROLL CRUSHER WRITTEN FOR THE MINING REVIEW the growing demand for chain stokers smokers has created a demand for fine coal in power plant use the knowledge of the higher efficiency obtained by using stoker only in a finely divided state has led to a demand for as small sizes as may be consistent with practical firing the two or three inch lump coal formerly considered satisfactory has been reduced to one inch and companying compa nying illustration has only recently in which are mounted a crushing roll and a breaker plate the breaker plate is hinged been placed on the market this crusher is built for use either at the tipple or may be mounted on wheels to operate on cn a track way over the storage bunkers the design of this crusher is extremely simple consisting of a heavy cast iron plate frame Z jeffrey single roll crusher smaller depending upon the type of stoker the demand for screenings has grown to io such an extent that in many sections it is already greater than for lump or mine run coal and exceeds the output of tho the mine screens to meet this demand and to dispose of the surplus lump many of the coal operators are finding it necessary and highly profitable to install crushers for reducing the lump coal to smaller sizes the jaffrey single roll crusher as per ac at its upper edge and held in position by a pair of adjusting rods enabling the roll to be varied to give any product required the coal is received in any volume without a mechanical feeding device for regulating the feed an efficient safety device protects men against shocks or accidents by making all reduction simultaneously it accomplishes comp lishes in a single operation the results which usually require two operations in two separate machines |