TANSO
Online ISSN : 1884-5495
Print ISSN : 0371-5345
ISSN-L : 0371-5345
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Volume 1964, Issue 39
Displaying 1-5 of 5 articles from this issue
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  • Studies on Carbon Powders for Telephone Transmitter
    Thermal Decomposition of Anthracite: Part II
    Seiji Kubota
    1964Volume 1964Issue 39 Pages 3-8
    Published: October 10, 1964
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.7209/tanso.1964.39_3
    JOURNAL FREE ACCESS
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    For the purpose to clarify the effects of roasting atmosphers on the properties of carbon powders for telephone transmitter, powders (50-80 mesh) of purified anthracite are roasted in various atmosphers, viz., nitrogen, hydrogen, town gas, charcoal gas liberated from anthracite itself and vacuum.
    Electrical, physical and chemical properties of the carbon powders thus obtained are investigated.
    It is found that the powders obtained by roasting anthracite powders in the atmosphere of town gas are very stable against humidity and that they are most excellent as carbon powders for telephone transmitter.
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  • Brush Wear and Commutation Film
    Kinji Kokubu
    1964Volume 1964Issue 39 Pages 9-15
    Published: October 10, 1964
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.7209/tanso.1964.39_9
    JOURNAL FREE ACCESS
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    (1) Brush wear depends upon current, brush pressure and characteristics of brushes in significant level, but commutator film and its temperature have only a little effect on brush wear.
    (2) Commutator film could be estimated by fritting type, and fritting voltage which bears a close resemblance to Poisson distribution. Good film is A-type having a large mean value λ.
    (3) Sparks cause film surface worse from type A to C, moreover, make increase the wear amount of brushes by dropping out of carbon particles.
    (4) The amount of brush wear in rolling traction could be calculated by adding each wear rate in sparking, current and temperature.
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  • Effect of Graphitization Degree on Machinability of Carbon
    Tooru Yanase
    1964Volume 1964Issue 39 Pages 15-25
    Published: October 10, 1964
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.7209/tanso.1964.39_15
    JOURNAL FREE ACCESS
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    The purpose of the present study is to establish the standards for carbon products.
    This paper reports the effect of the graphitizing degree on the machinability of carbons.
    The test was carried out by machining eight grade of carbons of different graphitizing degree with milling machine.
    The Results show that there exists a remarkable correlation between the machinability and the graphitization degree of carbon.
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  • [title in Japanese]
    [in Japanese]
    1964Volume 1964Issue 39 Pages 26-31
    Published: October 10, 1964
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.7209/tanso.1964.39_26
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1964Volume 1964Issue 39 Pages 32-37
    Published: October 10, 1964
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.7209/tanso.1964.39_32
    JOURNAL FREE ACCESS
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