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Transactions of the American Institute of Electrical Engineers

Volume XLVI: 1927

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Displaying Results 1 - 25 of 128
  • Index of authors

    Publication Year: 1927, Page(s):1176 - 1178
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  • Subject index

    Publication Year: 1927, Page(s):1172 - 1175
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  • A.I.E.E. Representatives

    Publication Year: 1927, Page(s):1170 - 1171
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  • A.I.E.E. Committees

    Publication Year: 1927, Page(s):1168 - 1170
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  • Officers AIEE 1926-1927

    Publication Year: 1927, Page(s): 1168
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  • Report of the Board of Directors for the Fiscal Year Ending April 30, 1927

    Publication Year: 1927, Page(s):1159 - 1167
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  • A.I.E.E. Outstanding Features of the Past Year

    Publication Year: 1927, Page(s):1153 - 1158
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  • Proximity Effect in a Seven-Strand Cable

    Publication Year: 1927, Page(s):1148 - 1152
    Cited by:  Papers (3)
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  • Calculation of stray load losses

    Publication Year: 1927, Page(s):1139 - 1147
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1869 KB)

    Early in the history of the development of the alternating current (AC) generator it was recognized that there might be losses present under load conditions in addition to the no-load losses and the armature copper loss due to load current. Because no one had a satisfactory means of measuring this loss it was not included in the early definitions of conventional efficiency. In 1913 papers were pre... View full abstract»

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  • Railway Inclined Catenary Standardized Design

    Publication Year: 1927, Page(s):1125 - 1138
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3245 KB)

    A description is given of a new method of overhead contact design, the ``ideal inclined catenary.'' This is based on an originally discovered tension and weight relation formula. A proof of the formula is given and other characteristics of the design are mathematically analyzed. A number of railroads now using inclined catenary is listed and data on the weights and tensions of their overhead const... View full abstract»

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  • The Collection of Current From Overhead Contact Wires

    Publication Year: 1927, Page(s):1114 - 1124
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    Up to a few years ago, the generally accepted limitations for the amount of current which could be collected from an overhead distribution system were from 300 to 800 amperes in heavy interurban service and between 800 and 1000 amperes, with a maximum of 1500 in the case of the Chicago, Milwaukee, & St. Paul. It is not possible to determine the limits of current collection by theoretical calcu... View full abstract»

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  • Catenary Construction for Chicago Terminal Electrification of Illinois Central Railroad

    Publication Year: 1927, Page(s):1108 - 1113
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    The object of this paper is to give briefly the procedure followed by the Illinois Central engineers in the layout, design, and erection of the catenary system. Brief reference also is made to the principal items of material entering into the construction and to methods of maintenance. View full abstract»

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  • Catenary Design for Overhead Contact Systems

    Publication Year: 1927, Page(s):1082 - 1107
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (8884 KB)

    This paper is intended to outline methods which have been found useful in the design of overhead contact systems where catenary construction is employed, with especial reference to the single catenary construction installed in 1925 on the Danbury Branch of the New York, New Haven, and Hartford Railroad as an extension of its 11,000-volt, single-phase, a-c. electrified zone; and on the New York, We... View full abstract»

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  • Current Collection from an Overhead Contact System Applied to Railroad Operation

    Publication Year: 1927, Page(s):1072 - 1081
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4591 KB)

    This paper discusses, from a non-mathematical standpoint, certain factors which should enter into the design of an overhead contact system on an electrified railroad. It emphasizes desirable features, mechanical and structural, and indicates practical limits which conditions will permit in the attainment of these features. Tests made by the Pennsylvania Railroad with slow-motion photography are ou... View full abstract»

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  • Mercury Arc Rectifier Phenomena

    Publication Year: 1927, Page(s):1064 - 1071
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3806 KB)

    Peter Cooper Hewitt invented the mercury arc rectifier in 1902, so that it can hardly be considered a new development. More than a half dozen different manufacturers are producing mercury arc rectifiers of various types and sizes and have been producing such rectifiers for years, so that commercial development is not new, yet technical literature is astonishingly bare of treatments going to the fu... View full abstract»

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  • Electric Strength of Solid and Liquid Dielectrics

    Publication Year: 1927, Page(s):1049 - 1063
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3524 KB)

    This paper was prepared by a subcommittee of the Committee on Electrical Insulation of the Division of Engineering and Industrial Research of the National Research Council. The general purpose of the committee is to foster research on dielectrics and its initial activities have been confined to the preparation of a series of summaries of the published literature on this subject. The subcommittee w... View full abstract»

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  • The Electrical Resistivity of Insulating Materials

    Publication Year: 1927, Page(s):1039 - 1048
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2262 KB)

    A brief review is given of the literature on conduction through insulators. Every dielectric has a definite resistivity when the potential gradient is below a certain value, different for each substance. If the potential gradient is continually increased, a point is reached where an increase in voltage does not affect the current. This is called the saturation current. With still greater potential... View full abstract»

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  • A Precision Measurement of Puncture Voltage

    Publication Year: 1927, Page(s):1025 - 1038
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4497 KB)

    A description is given of an apparatus for the automatic determination of the dielectric strength of thin sheet insulation. The machine makes about 1000 breakdown tests in a day. Almost no attention is required, thus reducing the human element to a minimum. The results of over 100,000 punctures are given. An investigation of the effect of temperature indicates that none of these punctures occurred... View full abstract»

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  • The Law of Corona and the Dielectric Strength of Air-IV The Mechanism of Corona Formation and Loss

    Publication Year: 1927, Page(s):1009 - 1024
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6237 KB)

    The mechanisms of corona and corona loss have been studied with the cathode-ray oscillograph. High voltage power of the order of 0.1 watt can be measured with an accuracy of 1 per cent with this instrument. The measurements show that the loss follows the quadratic law above the visual critical voltage. On polished wires there is no loss until the visual critical voltage is reached. The loss then s... View full abstract»

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  • Methods Used in Investigating Corona Loss By Means of the Cathode Ray Oscillograph

    Publication Year: 1927, Page(s):997 - 1008
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5407 KB)

    Methods of employing the cathode ray oscillograph for investigation of corona loss are described. By deflecting the ray of cathode particles (electrons) in one direction within the tube by a voltage proportional to the applied voltage, and in a transverse direction by a voltage proportional to the current, a closed figure representative of the loss, is thrown upon the screen. Methods of obtaining ... View full abstract»

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  • Present Status of the International Electrical units

    Publication Year: 1927, Page(s):990 - 996
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    This paper summarizes the present legal standing and practical usage of the international electrical units, particularly as maintained in the United States. The international agreement reached in 1910 was provisional and requires some revision. Further investigations of the international standards, as well as of the absolute units, are urgently needed to put the system on a satisfactory basis for ... View full abstract»

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  • Electromagnetic Waves Guided by Parallel Wires With Particular Reference to the Effect of the Earth

    Publication Year: 1927, Page(s):983 - 989
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1332 KB)

    A theory of the propagation of electromagnetic waves guided by a system of parallel wires is developed with particular reference to the effect of the earth, and is simplified so that it is identical in form with the elementary theory. Important general properties of a system of parallel conductors and their application to problems of propagation in power or communication circuits, or in a system o... View full abstract»

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  • The Use of High-Frequency Currents for Control

    Publication Year: 1927, Page(s):975 - 982
    Cited by:  Papers (1)
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  • Joints in High-Voltage Multiple-Conductor Cable

    Publication Year: 1927, Page(s):963 - 974
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5620 KB)

    In this paper the author has outlined the evolution of multiple conductor joints and explained in detail the development of a three-conductor, high-voltage joint for use with belted and metal sheathed cables or combinations of these. In the final design, spreaders and barrier tubes have been replaced by specially reinforced crotches and hand-wrapped insulation. To date, all tests,??short time and ... View full abstract»

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  • Radio Transmission System for Television

    Publication Year: 1927, Page(s):954 - 962
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4683 KB)

    Starting from the general requirements imposed on the transmitting medium, this paper discusses the engineering of a radio system for television purposes and describes the radio facilities actually employed for the recent Bell System demonstration. The tests to which the system was submitted to determine its suitability are outlined and the measured frequency-response characteristics are shown. An... View full abstract»

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