Journal . rding the temperature. The interior ofthe crucible is thus not afiected and the actionof the mixing apparatus is unimpeded.—T. St. Metal furnaces; Apparatus for regulating orindicating temperatures in . I. Hall, Birming-ham. Eng. Pat. 6016, March 10, 1914. Ix apparatus for regulating temperatures whereinthe inner member of a differential expansiondevice abuts against and actuates a pivoted lever,the end of the expansion rod is recessed to receivea small steel ball which abuts either directlyagainst the lever or against a recess formed on theunder side of a yoke piece pivoted to it. A
Journal . rding the temperature. The interior ofthe crucible is thus not afiected and the actionof the mixing apparatus is unimpeded.—T. St. Metal furnaces; Apparatus for regulating orindicating temperatures in . I. Hall, Birming-ham. Eng. Pat. 6016, March 10, 1914. Ix apparatus for regulating temperatures whereinthe inner member of a differential expansiondevice abuts against and actuates a pivoted lever,the end of the expansion rod is recessed to receivea small steel ball which abuts either directlyagainst the lever or against a recess formed on theunder side of a yoke piece pivoted to it. A con-stant leverage is thus produced whatever theangle of the lever may be.—T. St. Furnace or retort; Metal-melting . M. Gold- berger. Fort Wavne. Ind. Pat. ,090,Jan. 19, 1915. Date of appl., Aug. 11, 1911. The crucible, 13 (fig.) rests ui^on a pedestal, 12, inthe heating chamber, and has a removabletrumpet-shaped extension, 22, the latter beingattached to a flat ring hinged to the top of the. heating chamber and provided with a hinged,dome-shaped cover. The heating gases enterby the orifice, 5, pass through openings, 11, intothe horizontal, annidar channel, 9, in the furnacewall, and thence to the atmosphere.—W. E. F. P. [Metallurgical] converter. I H. Haas, San Francisco,Cal. Pat. , Jan. 5, 1915. Date ofappl., Jan. 13, 1913. Tuyeres are provided only in the top surface ofa central raised portion of the circular bottom ofthe converter.—A. S. Metallurgical furnace. U. Wedge, Ardmore, Pat. ,965, Jan. 15, 1915. Date of appl.,May 3, 1911. The furnace is composed of a series of verticalcolumns arranged in the form of an aimulus,opposite coluiAns being connected by transverseguders. Beams above and below the girderscross the latter at an angle, and certain of themare discontinued between the central pair of girdersto provide an opening for a central vertical shaftcarrying rabbles. The beams have horizontal andvertical flanges, and slabs r
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
