Show RECENT MINING PATENTS no stamp and roller crusher and adolph J petter rands burg cal A circular mortar having an annular die fixed therein stamps the stems of which are guided in a frame which is ably about a shaft forming the center of revolution rollers journ aled upon the frame between the stamps with their faces adapted to travel upon the dies and a carried by the revolving framed frame and including horizontal shafts and driving gear and cams on said shaft whereby the stamps are raised and allowed to fall upon the dies while advancing along the line thereof no dry concentrator frederick W wood los angeles cal the combination of a previous traveling belt means for feeding ore upon the belt means for forcing air through the belt a shutter moveable moveably move able toward and from the belt and an exhaust having its intake above the shutter no concentration concentrating ratin 9 table ulysses es S james helena montana assignor of one half to robert A bell same place A concentrating table provided on its surface with a series of substantial parallel longitudinal riffles fiffles extending from the forward end rearward and terminating short sh of the rear end of the table on a substantially diagonal line running g downward and rearward and a series of supplemental riffles fiffles interposed between the rear extremities of the aforesaid riffles fiffles rif fles no apparatus for roasting refractory frac tory ores robert A stewart cerrillos N mex alex the combination of a rotary ore retaining cylinder having contracted inlet and outlet end openings for the admission and escape of heat or other products of combustion adapted to retain the ore while being roasted means for supporting and rotating said cylinder a furnace a steam boiler or generator located over said furnace said furnace being adapted to supply heat both to io said boiler and said rotary ore cylinder a super heating steam coil located in said furnace and a steam pipe communicating from said bo boiler iler to said superheating super heating steam coil and from thence to the ore retaining cylinder no furnace william swindell and john C swindell allegheny pa the combination of a combustion chamber gas supply ports communicating with said chamber at the ends thereof means for supplying gas to laid aid ports discharge ports in the vertical wall of said combustion chamber opposite the gas supply ports waste flues leading underneath the combustion chamber from said discharge ports to a point paint of exit horizontal air flues above said waste flues and extending between the same and the floor of the combustion chamber lateral air flues fleties adjacent to the sides of the sides of the waste flues and communicating with said horizontal air flues at one end a traverse air flue beneath said lateral air flues and communicating ino 0 therewith at the other end means connecting said transverse flue to the atmosphere and means connecting said horizontal flues to the combustion chamber no ore separator and amalgamator henry fuller chicago ill the combination with a settling chamber of a series of amalgamated plates arranged therein to form a tortuous channel for the circulation of water water and ore and a permanently magnetic collecting plate suspended between adjacent amalgamated plates and provided at its lower edge with a series of fingers which permit of the circulation of liquid and ore no ore separator william hooper ticonderoga N Y assignor to charles Batt baltimore imore md an apparatus comprising a frame or casing arranged at a longitudinal incline a flexible material secured in the frame or casing and inclined from its longitudinal center downward to the sides a series of separating strips on the upper surface of the bed and arranged at an equal angle from the longitudinal center of the bed to the side edges the said strips forming channels adapted to receive the heavier particles and direct them to the outer ends of the strips the strips being arranged between the longitudinally extending plates and the frame of the machine and servino serving 11 to direct the sand or tailings from each side odthe of the bed to the central conduit |