Show PATENTS X I 1 MINING AND metallurgical the following mining and metallurgical patents haye have been issued by the united states patent office no david M dearing of denver colorado assignor el to guilford S wood of same place and henry P dearing of sandstone michigan rotary engine Z 18 C 7 20 zac 20 6 41 6 F NO I 1 in n a rotary engine the combination with a substantially circular casing a reciprocating cylinder head at one point therein a steam inlet port on one side of said head and an exhaust of a core rotating eccentrically within the casing and whose active face co acts with the cylinder head a pipe for super heated air en entering terino 0 tb the e steam inlet port and provided with an outwardly closing check valve and means for admitting and cutting off the flow vf nt moments no henry 0 white of boston massachusetts 3 electric motor in an electric driving t mechanism a bed and means for securing the machine thereto an electric motor axially adjustable on the bed combined with devices to clutch and align the machine and motor no wilhelm borchers of aix la chapelle germany high temperature pera ture smelting smelling Sm elting burnace Eur nace A high temperature smelting smelling sm elting furnace bace having two opposite fuel shafts oi 01 pa 02 alternately serving as combustion and heat accumulator chambers the horizontal passage s connecting the lower end portion of the fuel shafts a si sm elting chamber or shaft p g arranged centrally between the fuel shafts and opening at its lower end into said horizontal zon passa passage gp means eans tor feeding fuel to arid for closing the upper ends of said bueb shafts at the lower ends of said fuel said passage 8 for delivering air or oxygen into info the lower part only of the fuelin said shaft a gas escape pipe ba independent of the air supply nozzles having branches b ibi bi communicating respectively said fuel shafts for with the upper ends of a valve at carrying off the gasses the intersection of said pipes for closing either while the other remains branch discharge pipe open to discharge the brasses gasses from its box at k located fuel shafts and a below said smelting smelling sm elting shaft and having opening and closing devices no harrison B of denver colorado furnace for roasting ores A furnace for roasting ores having cavino two or more ovens each of said ovens having an opening in the bottom or bed thereof and a shaft with longitudinal blades located in each of said openings said shafts exten extending din 0 through the wall of said furnace and mechanism for simultaneously rotating said shafts from the outside of said furnace no john george leyner of denver colorado in a rock dr drill ill engine a rock cutting drill loosely positioned 0 27 46 ae 41 NO F fa NN I 1 46 J L L fig fy i 4 11 56 cv NO and supported in the drilling engine and arranged to be impinged upon one end by a reciprocal movement of the piston said ad rock cuttino cutting drill an axial hole through sa 11 from end to end arranged and adapted to convey a portion of the pistons actuating fluid directly from the cylinder to its cutting point to blow out from the hole being drilled the rock cuttings and means for mingling a supply of water with said actuating fluid in said rock cutting drill no frederick william martino baj V f r and rederic frederic stubbs of sheffield england treatment of ores and a nd precipitation of precious me metals atals from their cyanide solutions A process for the precipitation of precious metals from their aqueous cyanide solutions consisting in treating BUCK solutions solution S with a V hydrocarbon gas cras produced when a is deco decomposed imposed by water and cabau of precipitating the metals in 6 a ine tallie state no hans of 01 bangar tes muhle germany rotary team engine in a rotary steam engine the combination with a casing forming an enclosed ch chamber arabe of a disk or drum mounted in such chamber and carrying slide wings pressed outward against the wall of the chamber two inlet ports i i a steam passage leading to each of said ports i a valve located in each of said passages an exhaust outlet port adjacent to each of the inlet ports the wall spaces from the outlets to the next inlet abutting 11 against 1 the periphery of the disk or drum so as to leave no steam space and steam spaces between the drum and casing casin al extending Z from each of the inlet ports to the next exhaust port having the first portion from ito i to g of the same size throughout and the he portion from t g r to the next exhaust port first gradually enlarged and then gradually contracted |