Electrochemical and metallurgical industry . is fctcliing from 145s. to 147s. 6d. per75-pound flask. London, June 3. ANALYSIS OF CURRENT ELECTROCHEMICAL PATENTS, By George P. Scholl, Ph. D. Electric Furnaces and Furnace of Heating Carbon Articles.—F. J. Tone, NiagaraFalls. Patent 786,859, April 11, 1905. Application filedApril 2, 1904. The method provides for the treatment of carbon articles,such as carbon brashes,battery plates and furnace electrodes by heating them in an^ electric furnace. The lat- ter is provided with a re-sistance conductor, which,however, is not in contact
Electrochemical and metallurgical industry . is fctcliing from 145s. to 147s. 6d. per75-pound flask. London, June 3. ANALYSIS OF CURRENT ELECTROCHEMICAL PATENTS, By George P. Scholl, Ph. D. Electric Furnaces and Furnace of Heating Carbon Articles.—F. J. Tone, NiagaraFalls. Patent 786,859, April 11, 1905. Application filedApril 2, 1904. The method provides for the treatment of carbon articles,such as carbon brashes,battery plates and furnace electrodes by heating them in an^ electric furnace. The lat- ter is provided with a re-sistance conductor, which,however, is not in contactwith the materials to beheated, so that the currentis practically confined tothe conductor. It isclaimed that this arrange-ment allows the carbonarticles to be heated byconvection and radiation,and results in a more uniform distribution of the heat. Asshown in Fig. i, the furnace consists of a resistance conductorI, built up of plates or blocks of carbon. It rests upon a re-fractory base 3, and the articles to be heated are separated from. FIG. I.—TONE furnace. it by a space 5, good results having been obtained with a spaceof ^2 to ^4 in. between the core and the articles. The articlesmay be covered on the outside by a thin layer of powdered car-hon 6 and a suitable refractory material. The sides and endsofthe furnace are built up of brick walls 8. An alternativeform of furnace, shown in the patent, contains several conduc-tors, arranged parallel to each other, the groups of articles tobe heated being interposed between them. This form of fur-nace is stated to be particularly useful for treating carbons of-large size or considerable length, and may be operated in acontinuous manner by connecting the cores successively withthe source of current. Arc Electrode.—D. A. Holmes, S. A. Tucker and E. vanWagenen, New York. Patent 789,609, May 9, 1905. Ap-plication filed Aug. 6, invention relates to an electrode to be used for arclighting, which is formed of zirconium carb
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