Arizona republican., 1898-06-27
MINING PATENTS.

Messrs. Townsend Brothers, sollci- tors of patents, g Downey block, Los Angeles, California, report the follow ing list of recent patents of interest to mining men: &
 May 17. CO.,, 04,O23.-Process of treating copper matte. J. Colquhoun, Clifton, Ariz.. Filed November 3, 1897. An improvement in the art of reducing copper by the Bessemer process, consisting in storing the matte in a reverberatory furnace, and adding slags from the converter in or der to clean them.
 May F. 6O4, ,061.-Ore concentrator filed w. E. Mendenhall, Flagstaff, Ariz. Assignor of one-half to Ezra s. Cos ney, same place. filed April 2S. 1897. This consists of a receptacle mounted to shake back and forth, and provided d with a tier of concentrating traps be- ing dish-shaped and discharging at the circumference, and the other trays bs- ing cone-shaped and discharging at the center.
 May F. GOA, 4,167-Method of treating metallic ores. S. c. c. Currie, Mon J., Edward N. Dickerson, New York, N. Y. Filed Feb. 19, 1897. The process of extracting metals from their ores, which consists in treating the ore with a solution containing free chlorine and a hypochlorite, the former being in ex- cess of the chlorine in the latter.
 May F. GOA, ,152.-Rock drill. M. c. Jackson, Denver, Colo, assignor of one half to H.. D. Crippen, same place. Flied August 16, 1897. This consists of drill operated by power spring, and the invention comprises the mech anism whereby the drill is drawn back against the resistance of the power spring, and is partially rotated at each stroke. sI E,
 May F. 604 4,054.-Smelting furnace. H. Lang, Oakland, Cal. Filed Feb. IS, 1897 This consists of a circular ho- mogeneous structure, formed of moulded refractory plastic material, comprising a hearth and an arch over the said hearth, dome shaped within and fiat without, having an inclined margin, and meeting said dome at the joining line at an acute angle, the structure being supported from the outside by vertical stays and support ing brackets fixed thereto and encir- cling adjustable elastic bands.
 May A. 604,627.-Apparatus for con- centrating gold bearing sand. A. Mo Dougal1, Duluth, Minn. Filed Jan. 27, 1896. This comprises certain improve ments in dredging apparatus, whereby the gold bearing sand or gravel is rais- ed from the bed of the frame by a ,in ic on barge or scow.
 May 24 GOA, ,566.-Machine for separ- ating fine gold flakes from sand. J. N. Marion, Louisville, Ky. Filed Jan- 70, 1897. Dry material is fed into recep- tacle, and an air blast blows upward the finer portion of the sand and the flour gold against screen adapted to permit the passage through 1t of only the dust and flour gold; an exhaust fan collects the dust and flour gold and discharges it into a suitable re- ceiver.
 May 24. GOA, ,502-Stamp mill. E. Reynolds, Milwaukee, Wis. Filed March 13, 1897. Thds relates to cer- tain improvements in steam stamp mills. F
 May 31. 6o4,97S.-Centrifuga Anal gamator and separator. c. L. Garland, Sydney and John Murray, and Samp- son E. Murray, Cowra Creek, New South Wales. Filed July 8, 1887. A bowl, mounted on a central hollow shaft, having feed hopper, the lower portion of said shaft being slotted to permit the material to fit into the bottom of the bowl, an inverted, fun nel shaped, amalgamating plate en- circling the slotted portion of the shat and carrying the material downward into the bottom of the bowl; the bowl is provided with plates or discs projecting into corresponding num- Der of catch grooves or traps formed in the wall of the bowl.
 May 31 604,762.-Crusher. A. Jor- dan, London, England. Filed July 3, 1896. Patented in England, April 21 1896. No 8,3S6. A rock crusher, hay ing one arc shaped, rocking, crusher jaw, and the stationary jaw being mounted upon spring. which permi it to reciprocate up and down as the crushing is effected.
 May 31. GOA ,920.-Ore concentration E.. M. Rich. Silverton, Colo. Filed June 8, 1S97.- Similarly formed, fun nel shaped receptacles are inversely disposed and joined at their smaller