The Journal of the Institute of Electrical Engineers of Japan
Online ISSN : 2187-6797
Print ISSN : 0020-2878
ISSN-L : 0020-2878
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Volume 45, Issue 442
Displaying 1-7 of 7 articles from this issue
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  • Transient Potential Distribution in Transformer When its Terminal is Grounded
    RISABURO TORIKAI
    1925 Volume 45 Issue 442 Pages 387-398
    Published: 1925
    Released on J-STAGE: November 20, 2008
    DOIhttps://doi.org/10.11526/ieejjournal1888.45.387
    JOURNAL FREE ACCESS
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    The author studies the transient abnormal potential distribution in a transformer coil, in the case of grounding its terminal, taking the terminal oscillating circuit composed of capacity of bushing and lightning arrester and self induction of the choking coil into account, and concludes that the potential gradient may be very much greater with the oscillating circuit than withont it. The greater terminal capacity, the less the dangerous potential gradient.
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  • On the Power Diagram of Transmission Network
    FUMIKI KITO
    1925 Volume 45 Issue 442 Pages 399-410
    Published: 1925
    Released on J-STAGE: November 20, 2008
    DOIhttps://doi.org/10.11526/ieejjournal1888.45.399
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    In the Journal of A. I. E. E, Feb. 1924, M ssrs. C. L. Fortesque and C. F. Wagner have given a new method of proving the power circle diagram, maintaining therein the idea of angular displacement betwocn voltage vectors at generating and receiving ends. Adopting this idea, it is proved in the present paper that for any transmission network with two or more condensers the power diagram consists of a chain of circles, the number of circles being equal to that of condensers used.
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  • On the Ballistic Energymeter Which Designed for the Purpose of Measuring the Spark Energy
    JUSUKE OKOCHI, KENKICHI INAKAWA
    1925 Volume 45 Issue 442 Pages 411-420
    Published: 1925
    Released on J-STAGE: November 20, 2008
    DOIhttps://doi.org/10.11526/ieejjournal1888.45.411
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    The theory and the experimental results of the Ballistic Energymeter are stated in this paper, this meter designed by the author for the purpose of measuring the energy of an instantaneous high voltage and small current such as an energy of an electric spark.
    It is shown by the experimental results that this meter can measure accurately the energy of an order of some hundred ergs with the error of several percent, actual measuring examples of spark energy are shown.
    At last stated that this meter able to use for the studies of inflammability of explosive gas-mixture and many other pro lems of spark and spark ignition.
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  • The Johnsen-Rahbek Electrical Attraction and its Application
    S. MOCHIZUKI, S. HIROSAWA
    1925 Volume 45 Issue 442 Pages 421-428
    Published: 1925
    Released on J-STAGE: November 20, 2008
    DOIhttps://doi.org/10.11526/ieejjournal1888.45.421
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    Under direct current voltage supply, the writer deals with the adhesive force set up between a metal plate and a semi-conductor with which it is in close contact, and the resistance of such a system.
    In the case of a plain semi-conductor, the adhesive force is only about the second power of the applied potential, in spite of the contact surfaces are polished with special attension.
    The increase of the cond ctivity with increasing potential difference is chiefly due to the variation of the distribution of moisture at interface and the electrou emitted from the metal, and not coming into more intimate contact at higher potentials, unless the contact surfaces are polished carefully.
    The difference of conductivity due to polarity is especially remarkable in agate.
    As an application of this adhesive force, a simple telephone receiver and a transmitter have been contrived.
    This paper includes the following topics:-
    I. Introduction.
    II. Volta e-pressure changes.
    III. Current-pressure changes.
    IV. Variation of resistance with time of application of potential difference.
    V. Voltage-Resistance changes.
    (a) in atomosphere
    (b) in dry state only at contact surfaces.
    VI. Application.
    VII. Conclusion.
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  • On the Electromagnetic Induction upon the Aerial Telephone-Cable Caused by Neighbouring Transmission Line
    KAZUHO KANAYA
    1925 Volume 45 Issue 442 Pages 429-442
    Published: 1925
    Released on J-STAGE: November 20, 2008
    DOIhttps://doi.org/10.11526/ieejjournal1888.45.429
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    In this paper author discusses on the electromagnetic induction upon the aerial telephonecable, which is adopted in this country recently for long distance telephone-circuits, caused by grounding of neibouring transmissionline.
    The compensative actions of sheath current have been shown and discussed by some aithorities, but their characters have net been investigated fully hitherto. Author has ob ained some loci graphically, by whi h the functional charactors of circuit constants as well as inductance coil, with which the sheath to be groundod, are mapped out simply. The effective resistance, partly due to A.C. losses, i.e. those of hysteresis and eddy-current, are seemed to hinder the compensative action of grounding inductance, and which is also discussed graphically. And as is well known, that the favourable condition lies to increase the time constant of cable sheath, which is equivalent to enlarge the size of circles, is discussed also. But sorry to say the problems of cross-talk introduced in the telephone circuit are not discussed here.
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  • An enna Constants
    N. MARUMO
    1925 Volume 45 Issue 442 Pages 443-455
    Published: 1925
    Released on J-STAGE: November 20, 2008
    DOIhttps://doi.org/10.11526/ieejjournal1888.45.443
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    After introducing the theory of antenna circuit having uniformly distri uted constants, such as inductance, capacitance, and resistance; and shows the fact that an antenna circuit can exactly represented by equivalent circuit which a closed oscillation circuit carrying uniform current, deriv ng from the Maxwell-Lagrange equation.
    Equivalent constants, and especially natrral frequency of an antenna circuit is introduced and sows that the frequency can be calcuable either equivalent constants of antenna circuit and thomson's formula
    f=1/2π√CeLe, or staic constants of antenna circuit and the equation
    tanω√CALA=√LA/CA/ωLθ-1/ωCθwith graph
    where Ce, CA=equivalent and static capacity
    Le, LA=equivalent inductance and static inductance
    L0, C0=loaded inductance and capacity at the base of antenna
    ω=2πf
    f=natural frequency of antenna.
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  • Developments in Steam Power Plants and Their Effect on Thermal Efficiency
    ESKIL BERG
    1925 Volume 45 Issue 442 Pages 456-464
    Published: 1925
    Released on J-STAGE: November 20, 2008
    DOIhttps://doi.org/10.11526/ieejjournal1888.45.456
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