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 44, Issue 429
Displaying 1-5 of 5 articles from this issue
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  • The Structure of Atoms
    H. NAGAOKA
    1924Volume 44Issue 429 Pages 381-384
    Published: 1924
    Released on J-STAGE: November 20, 2008
    DOIhttps://doi.org/10.11526/ieejjournal1888.44.381
    JOURNAL FREE ACCESS
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  • Electrification of Farming
    MINORU FUKUDA
    1924Volume 44Issue 429 Pages 385-398_1
    Published: 1924
    Released on J-STAGE: November 20, 2008
    DOIhttps://doi.org/10.11526/ieejjournal1888.44.385
    JOURNAL FREE ACCESS
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    The demand of electric power increases and decreases in winter and summer season respectively. On the contrally, we have shortage and surplus of water utilized for hydro-electric power in respective season.
    To suit the demand by hydro-electric power, we have its enormous excess in summer season.
    Unfailing remedy to the objection is to utilize the power for the electrification of farming, that is,
    1. Cultivation
    2. Hulling and drying ec.
    3. Subsidiary works, -poultry, sericulture ec.
    4. Draining
    5. Irrigation
    About 350, 000 HP will be wanted for draining and irrigation in the main parts of Japan.
    The writer investigated specially the load curve of manual power for farming, and the objection of unequal demand and supplly can be solved by the investigation about the farming load curve and hydrograph of the rivers in Japan.
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  • On the Measurement of Natural-Frequency of an Inductance Coil at Audio-Frequency
    H. NUKIYAMA, K. KOBAYASHI
    1924Volume 44Issue 429 Pages 400-405
    Published: 1924
    Released on J-STAGE: November 20, 2008
    DOIhttps://doi.org/10.11526/ieejjournal1888.44.400
    JOURNAL FREE ACCESS
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    By Campbell's frequency bridge, we measure the frequency of the alternating current by known mutual inductance. and capacity. The same circuit can be utilized to determine the natural frequency of a coil used as the primary of the mutual inductance, knowing the frequency of the current and the capacity, which gives the balance. In the experiment described in this paper, the frequency is determined by standard tuning forks.
    A theory by which the natural frequency and the self-capacity of the primary coil can be obtained by taking the balance at two known frequencies is worked out the actual method of experiment and the experimental check of the theory are described.
    When the sharpness of the balance is greatly affected by the effect of the selfcapacity, it can be improved by a simple modification of the circuit as shown in Fig. 6. (Jan, 1924, Sendai, Japan)
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  • On the Automatic Hydraulic Power Station.
    M. FUKUDA, T. SATO
    1924Volume 44Issue 429 Pages 406-426
    Published: 1924
    Released on J-STAGE: November 20, 2008
    DOIhttps://doi.org/10.11526/ieejjournal1888.44.406
    JOURNAL FREE ACCESS
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    The No. 4th Kawakami-gawa Station, or the automatic hydraulic power station, the pioneer of an automatic station in Japan has been schemed by the Kyushu Dento-Tetsudo, the Toho Elec. Power Co. at present.
    The job started on October 1922, and the station was completed on April. The government sanction to operate use has been on the 11th. of May 1923. The generator was made by General Electric Co. and the turbine by Voith Water Turbine Mfg. Co.
    In our country, an existing automatic station is the Asahi Power Station of the Bisan Electric Power Company, a sisiter company of the Toho Electric Power Co., but the system of this station is so-called a semi-automatic station with an induction generation which is controlled by the head tank water level by means of the three control wires. While, the No. 4th. Kawakami-gawa Station is entirely automatic station which is controlled only by energizing or de-energizing the transmission line from the main station.
    After the completoin, many expart visited the plant with great interest, and then I believe it is not in vain to be read the paper about the automatic station at the meeting of the Institute of the Electrical Engineer by Mr. T. Sato, who has been in charge of designing and erection of the plant.
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  • D. C. High Voltage Cable Testing Sets
    R. NAKAMURA
    1924Volume 44Issue 429 Pages 427-442
    Published: 1924
    Released on J-STAGE: November 20, 2008
    DOIhttps://doi.org/10.11526/ieejjournal1888.44.427
    JOURNAL FREE ACCESS
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    In a. c. high voltage tests of long cables, the capacity of the transformer may be necessarily large on account of the great amount of the charging current. The necessary power often amounts to several hundred K. V. A., because of increasing in proportion to the capacity of the lines and to the square of the voltage, so that the a. c. testing sets are inconvenient for transportation owing to its large size.
    To overcome these difficulties, the d. c. testing sets were introduced for long years by means of a kenotron or a mechanical rectifier in combination with condensers.
    The writer has recently constructed a mechanical rectifier for this purpose and studied the characteristics of this equipment.
    The features of the paper are as follows:-
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