The Journal of the Institute of Electrical Engineers of Japan
Online ISSN : 2187-6797
Print ISSN : 0020-2878
ISSN-L : 0020-2878
Volume 41, Issue 398
Displaying 1-9 of 9 articles from this issue
  • [in Japanese]
    1921Volume 41Issue 398 Pages 625-634
    Published: 1921
    Released on J-STAGE: November 20, 2008
    JOURNAL FREE ACCESS
    In building high frequency generators of large capacities, numerous difficulties must be surmounted. The difficulties are not only mechanical but electrical as well and these are pointed out very vividly. The constructional details of a new 400 K. V. A. Alexanderson Extra High Frequency Generator, built by Shibaura Engineering Works under Japanese patent are given with test results. The author concludes with his personal impression of the new generator.
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  • Y. Shichiri
    1921Volume 41Issue 398 Pages 635-648
    Published: 1921
    Released on J-STAGE: November 20, 2008
    JOURNAL FREE ACCESS
    Solctions of vatrio s stayed structures fur line supports are given, and the most ceonurnical angles of the say are discu sel in this article.
    At trst for sintle poles the most economical angle is calculated, and then calculations are tried for the cotnphx case cot sidering bending of the pole.
    In the third and the forth parts H-poles and A-poles are treated respectively.
    In the fifth part bide base towers are treated, and solution of the complex structures is peformed by using the di-placement diagram of the towers.
    Results of these several cases are discussed, and the article is concluded. ltjis the auther's of inion that the most ecor omical mgle of the stay is iess than 45 degree; it is somewhat 30 degrees in general.
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  • K. Kita
    1921Volume 41Issue 398 Pages 649-689
    Published: 1921
    Released on J-STAGE: November 20, 2008
    JOURNAL FREE ACCESS
    The development in the utlization of powdered coal as a boiler_??_fuel in America has been so marked that the attention of power plant experts of the world has been focussed there. The Fuel Research Board of London even went so far as to send a specialist to the United States to investigate the actual working conditions of the various powdered coal plants. This paper deals in the main with the following topics:-
    1. The extent of use of powdered coal at power plants in America.
    2. The equipments used in plants burning powdered coal.
    3. Some of the difficulties encountered and overcome in its use
    4. The first cost, operating and maintenance expenses of various types of powdered coal, plants now in operation.
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  • H. Tachikawa
    1921Volume 41Issue 398 Pages 690-699
    Published: 1921
    Released on J-STAGE: November 20, 2008
    JOURNAL FREE ACCESS
    This paper primarily deals with the high tension insulators of present day as was noted by the author during his recent visit to the United States. Expert opinions of transmission specialists and leading manufacturers are the basis of this paper. Part of the contents was presented as a discussion of the paper on “Insulators in High Voltage Transmission” by Mr. W. A. Hillebrand. at the June meeting of the Tokio branch of the Institute.
    The subject is presented according to the following headings:-
    1. Materials for insulators.
    2. Improvements in the pin type insulators.
    3. Comparative study of typical suspension type insulators.
    4. Improvements in the cap-and-pin type insulators.
    5. Comparison of clevis joints and ball-socket joints.
    6. Depreciation of insulators.
    7. Methods of weeding out defective insulators.
    8. Method used in changing defective insulators.
    9. Protective methods used for insulators.
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  • S. Tada
    1921Volume 41Issue 398 Pages 700-703
    Published: 1921
    Released on J-STAGE: November 20, 2008
    JOURNAL FREE ACCESS
    A few years ago, the author advocated the co-ordination of electrical industries of the empire and th_??_s in t_??_rn opened the path for the discussion of the na_??_ionalization of power plants. The problem of nationalization is reated in the paper not from the popular view. points of economy and indes_??_ry but from the standpoint of po_??_cy of the human society It is the author's firm conviction thit as the natural resources, water and coal, which are necessary for the generation of heat, light and power-all absolutely essential to men-are limited in qu_??_ntity, the s_??_iety should control the power plants for the benefit of its members. The following two points are advanced to make nationalization.
    A success: -
    1. The generated power to be distributed te the people on the profit sharing basis at a reasonable figure per KW.
    2. The management to be in the hands of a spec_??_al commettee invested with absolute power.
    The author believes that the p esent tendency of amalgamation of power companies will only new power to the already supreme capitalism and is a hindrance to nationalization.
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  • Hideo Matsumoto
    1921Volume 41Issue 398 Pages 704-707
    Published: 1921
    Released on J-STAGE: November 20, 2008
    JOURNAL FREE ACCESS
    It is well known that working energy of the electric meters has been limited to only two of the electric and the magnetic energy, and the difficulty of the construction of high sensibility meters and the expensiveness of these price are mainly owing to the limitation of the working energy. The author recently invented a new electric meter, the “Revolving type electric meter”, and obtained a patent (registered No. 38921), The following article gives the statement of its theory and construction principle;- In this meter the mechanical energy is easily used as the working energy in addition to the electric and the magnetic energy, by the constant speed separately excited generator principle, and its theory and principle can be effectively applied for the wide range of electric meters and measuring instruments.
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  • Hideo Matsumoto
    1921Volume 41Issue 398 Pages 708-709
    Published: 1921
    Released on J-STAGE: November 20, 2008
    JOURNAL FREE ACCESS
    The author states the pr nciple and the con_??_struction of a new electric amplifing appar_??_t _??_s, the “Revolving type electric amplifier” or the “Revolving type electric relay”, which the author has been designed by the same principle of the “Revolving type electric meter” (Patent No. 38921), and its speciality is that it has no spark or arc gap in the workig device.
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  • 1921Volume 41Issue 398 Pages e4a
    Published: 1921
    Released on J-STAGE: November 20, 2008
    JOURNAL FREE ACCESS
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  • 1921Volume 41Issue 398 Pages e4b
    Published: 1921
    Released on J-STAGE: November 20, 2008
    JOURNAL FREE ACCESS
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