Show RECENT MINING PATENTS mining reporter no rotary engine abijah taylor chicago ill assignor of one half to jas welch of webster city iowa A rotary engine comprising a ratably sup pd ported arted cylinder a piston ratably and ex of der and in contact with its surface at one point and folding piston wings hinged to said piston and adapted to fold in flush with the surface thereof no art of smelting smelling Sm elting ores franklin ballou of leadville colorado an invention re relating latino to the smelting smelling sm elting of ores with the object of economizing the consumption of the coke used in such smelling smelting sm elting operations with the improved results more especially in smelting smelling sm elting though it is applicable equally to the smelting smelling sm elting of iron lead copper or other ores in stack furnaces said invention is based on a discovery of the very great advantages resulting from the thorough saturation of the coke with water prior to charging it into the smelting smelling sm elting f virnace Lir nace the water with which the fuel is charged does not ultimately interfere with its combustible qualities but it retards regards combustion until the charge has sunk to the proper point in the furnace nearer the smelting smelling sm elting zone than is the case when the coke is charged in dry thus the coke does not burn until there is a very considerable body of charge on top of it the heat is thus confined to its proper zone by this resistant overlying body and the ore is ultimately found to be re reduced with a smaller percentage of consumption of fuel than when the coke is used in a dry state and thus wastefully burns higher in the stack in practice the coke is allowed to soak in water from one to three days large iron tanks may be used which are first filled with coke and then the water run in until it is covered the great economy affected by the employment of this process is no doubt due first to the more complete combustion of the fuel when its comb combustion u stion is retarded until it arrives at the proper zone of combustion where the heat is intense second to the keeping of the top of the furnace always cool and therefore avoiding what known is in the art as the hot tops and third the saving in waste by the greatly reduced amount of volatilization in the smelting smelling sm elting of ores or matter of the precious metals after the coke is thoroughly 1 saturated as above above described it is fed into the furnace with the ore charge in the usual manner and with the flux if a flux be used no rotary engine william francis james of quintana texas A rotary engine comprising a cylinder casing having a recess located outside the cylinder chamber and communicating with said chamber and the steam supply an abutment hinged in said chamber and closing the he same against the passage of steam the abutment having a port extending through it and terminating at its outer or radical face and closed when the abutment is swung outward and a lug or extension at the upper end of the abutment seating upon the casing and limiting in a the inward swing of the abutment the abutment and casing having a registering plunger and a receiving recess forming a dashpot dash pot to check its seating action no device for operating mine shaft doors charles caldwell of anaconda Co lorada in a mine elevator the combination with the hinged spring actuated door of the oscillating rope wheel the rope connected therewith and with the door the cog wheel carried by said rope wheel the rack bar engaging therewith and means for operating the same by the movement of the elevator cage e |