TANSO
Online ISSN : 1884-5495
Print ISSN : 0371-5345
ISSN-L : 0371-5345
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Volume 1965, Issue 41
Displaying 1-5 of 5 articles from this issue
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  • Unbalanced Current in Split Brushes
    K. Kokubu, M. Kumagai
    1965 Volume 1965 Issue 41 Pages 3-10
    Published: June 10, 1965
    Released on J-STAGE: March 01, 2011
    DOIhttps://doi.org/10.7209/tanso.1965.3
    JOURNAL FREE ACCESS
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    Main traction motors MT 200 for the New Tokaido Line, which are used at high speed and high current density in pulslating or direct current, are carefully designed in order to keep good commutation and the brushes used are split ones made from soot. As tempered colour was considerably noticed at the pig tails of brushes in the car running test, unbalanced current among brushes was measured in the original machine with the voltage drop method at stand test of factories.
    Obtained results are followed;
    (1) Unbalanced current between brush splits is higher at the leading split than at the trailing one, and indicates considerably larger value than the general unbalanced current among parallel brushes. This causes are assumed mainly to be the motor design constructed of over-commutation.
    (2) Though sliding charactristics of split brushes depend upon each split moving independently, this independency causes unbalnced current.
    (3) Since the unbalanced current in split brushes is unavoidable, selection of brush current density and fastening method of brush pig tails should be designed move carefully.
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  • Physico-Chemical Properties of Carbon Black as the Byproduct of the Texaco Process, (Part 2)
    Atsuyuki Ueno, Masuhiro Nonoyarna, Shumpei Oka
    1965 Volume 1965 Issue 41 Pages 11-17
    Published: June 10, 1965
    Released on J-STAGE: March 01, 2011
    DOIhttps://doi.org/10.7209/tanso.1965.11
    JOURNAL FREE ACCESS
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    In order to find out profitable uses for the carbon black, produced in the Texaco Process Furnaces, the behaviors and properties under ball mill treatments were studied, and compared with those of acetylene black, which in commonly used in the dry battery industry.
    The following 6 properties of both carbons crushed by ball mill were studied; (1) initial apparent specific volume υo, (2) apparent specific volume after tapping 100 times υt, (3) apparent specific volume compressed statically υc, (4) oil adsorption, (5) electric resistance ρ and (6) observation of the configuration of the “Structure” by an electron micrography, and the structure of both carbons were discussed.
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  • CATALYST ON GRA PHITIZATION OF CARBON (I)
    Catalytic Actions of Some Aluminosilicate Minerals including Sericite
    Tadao Ishikawa, Saburo Magari, Yasuo Mizutani, Shiro Yoshizawa
    1965 Volume 1965 Issue 41 Pages 18-25
    Published: June 10, 1965
    Released on J-STAGE: March 01, 2011
    DOIhttps://doi.org/10.7209/tanso.1965.18
    JOURNAL FREE ACCESS
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    We planned to lower the graphitization temperature by relying on the action of catalyst.
    Our observation on aluminosilicate minerals is based on the fact that the graphitelike lustre of the smonked tile produced with the body, the surface of which is smeared with the clay containing micaceous minerals such as sericite, is better than that of one produced without such a clay.
    In case of sericite, the following were obtained.
    Its own action increased suddenly at about 1800°C and disappeared already at 2000°C, the temperature at which the graphitization of the simple coke not containing sericite increased suddenly, but the effect obtained was equivalent to the heat-treatment of 2500°C without sericite. It was found that sericite is effective to the contraction of the interlayer spacing, d, and to the growth of the average diameter of an hexagonal network layer, La. In the range of from 2000° to 2400°C, the best result was observed by applying about 8% of sericite. Both the uncalcined sericite and the anhydrous one prepared by calcination showed no difference in the effects on the graphitization and on the physical properties of the produced graphite. The mixture of reagents of the same compositions as sericite was not effective. Sericite also exhibited the purifying action. Next the higher graphitized product was trial manufactured with sericite on a large scale by the industrial process in haste; thus it was confirmed that the industrial application of sericite is possible.
    Lepidolite of the same mica group as sericite, petalite, and kaolinite were effective, too.
    The following were concluded from the above facts.
    The catalytic action may be effective in the temperature range which is necessary to complete the final carbonization of the residual incomplete parts in the structure of coke which were not carbonized completely yet at the coking temperature. The hexagonal network layer structure of aluminosilicate may act effectively on the growth of the layer structure of graphite. The increase of graphitization and purification established during the graphitization process may connect closely each other.
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    1965 Volume 1965 Issue 41 Pages 26-35
    Published: June 10, 1965
    Released on J-STAGE: July 05, 2011
    DOIhttps://doi.org/10.7209/tanso.1965.26
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1965 Volume 1965 Issue 41 Pages 36-38
    Published: June 10, 1965
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.7209/tanso.1965.36
    JOURNAL FREE ACCESS
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