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Volume 41, Issue 397
Displaying 1-4 of 4 articles from this issue
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Tatsuo Ishiyama1921 Volume 41 Issue 397 Pages 541-545
Published: 1921
Released on J-STAGE: November 20, 2008
JOURNAL FREE ACCESSMarvelous advancements are now being made in America with regard to the manufacturing arts of electrical machinery. They are constantly trying new methods, thereby furnishing new or improved articles in the market. Needless to say, there are a great multitude of highly educated and experienced engineers, “behind the gun”. These eminent engineers, however, cannot be brought about easily, It is believed by the author that the methods of fostering young engineers, adopted by the Westinghouse Electric and Manufacturing Company are undoubtedly worthy of attention of the electrical circle in Japan. Educational systems suitable for the different classes of graduates are stated in this paper.View full abstractDownload PDF (356K) -
Suketzugu Kimura1921 Volume 41 Issue 397 Pages 546-577
Published: 1921
Released on J-STAGE: November 20, 2008
JOURNAL FREE ACCESSThe auther states the present day condition of the iron wire in Japan, mainly from the standpoint of telephone and telegraph engineers. The contents will be c_??_assified as follows:-
1. Introduction
2.3.4._??_ Process of manufacturing of the iron wire and the various factors to be considered during its course.
5.6._??_ The effect of annealing on the iron wire just drawn.
7. Japan has succeeded in manufacturing the iron wire of high quality.
8. Remarks on Specifications.
9. Various forms of the zinc coating and its resistivity to corrosion.View full abstractDownload PDF (4557K) -
Kanesaburo Kurokawa1921 Volume 41 Issue 397 Pages 578-603
Published: 1921
Released on J-STAGE: November 20, 2008
JOURNAL FREE ACCESSIt is well known that the electric impedance of the telephone Receier is affected by the motion of diaphragm, which in turn depends upon the condition of air space adjoining to it. This fact was made clear by the authors experiments; i. c. it was shown how the electric impedance of Receiver circuit was changed by applying car to receiver or by placing a long pipe in front of it. Moreover, in the latter experiment, the test results may well be explained by means of “acoustic impedance” theoretically deduced. A few instances of practical applications resulted from the author's experiments are also discussed.View full abstractDownload PDF (1548K) -
Tetsutaro Miyazaki1921 Volume 41 Issue 397 Pages 604-623
Published: 1921
Released on J-STAGE: November 20, 2008
JOURNAL FREE ACCESSIn finding a solution for e'ectrical problems mathematically, one frequently runs into unrelated terms the author advances the theory that by the use of difference equation, more reasonable solution will be obtained. With a simple difference equation for transmission circuit which can easily be changed to a straight line function, a few examples of the general application the diffecence equation are given for suspension insulators, multi-gap arresters, distribution of potential in the transformer windings, wave filter and loaded cables.View full abstractDownload PDF (800K)
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