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Journal of the A.I.E.E.

Issue 11 • Date Nov. 1927

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Displaying Results 1 - 25 of 55
  • Contents

    Publication Year: 1927, Page(s): 1
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    Freely Available from IEEE
  • Current electrical articles published by other societies

    Publication Year: 1927, Page(s): 1
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    Freely Available from IEEE
  • Suggested change in Institute publications

    Publication Year: 1927, Page(s):1149 - 1150
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    Freely Available from IEEE
  • An instrument for measuring short-circuit torque

    Publication Year: 1927, Page(s):1151 - 1159
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3313 KB)

    The torque produced by a short circuit or other transient will produce a corresponding acceleration of the rotor. If the rotor is not connected to a load the acceleration of the rotor will be directly proportional to the torque. A small instrument is described which can be attached to the end of the shaft of the machine to be tested. This instrument records the instantaneous acceleration of the ro... View full abstract»

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  • Electric discharges for petroleum production

    Publication Year: 1927, Page(s): 1159
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (259 KB)

    Many manifestations of the potency of electricity in industrial production processes have been had and the end is not yet. A threshold type of experiment with numerous industrial possibilities was recently described before the American Electrochemical Society by Drs. Lind and Glockler. Previous experiments of Dr. Lind with radon emanations acting on ethane or other hydrocarbon gases showed that io... View full abstract»

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  • Instability in transformer banks

    Publication Year: 1927, Page(s):1160 - 1166
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1574 KB)

    This paper considers the instability which sometimes occurs in banks of transformers supplying a capacity load when certain harmonics in the primary current are suppressed, either by the type of transformer connections or by a resonant circuit in series with the primary of the transformer, and the similarity between the several unstable circuits is pointed out. Curves showing the triple-frequency ... View full abstract»

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  • Tests indicate radio waves penetrate earth and rock

    Publication Year: 1927, Page(s): 1166
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (277 KB)

    Tests conducted by the United States Bureau of Mines, Department of Commerce, in a Colorado metal mine indicate strongly that radio waves will penetrate 500 feet or more of rock strata. These preliminary experiments were observed by Dr. A. S. Eve, Director of the Department of Physics, McGill University, Montreal, Canada, who is conducting a study for the Bureau of Mines of the possibilities of va... View full abstract»

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  • Recent improvements in large induction motors

    Publication Year: 1927, Page(s):1167 - 1175
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5019 KB)

    Like that of many other rotating electrical machines, the development of the large induction motor has been a steady and an interesting progression. From the first induction motor to the present product has been a long step, marked by the analytical ability of many capable engineers, and accompanied by continual improvements in construction, some of which are reviewed in this paper. To describe th... View full abstract»

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  • Measuring a billionth of an inch

    Publication Year: 1927, Page(s): 1175
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (282 KB)

    Equipment to measure changes in length of the order of a billionth of an inch has recently been devised by P. P. Cioffi of Bell Telephone Laboratories. Such a length but about one-tenth the distance between the atoms of most metals would be required to equal a piece of ordinary tissue paper in thickness. View full abstract»

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  • Auxiliary power at Richmond station: Auxiliary power system and tests on house turbine generator

    Publication Year: 1927, Page(s):1176 - 1184
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4996 KB)

    This paper describes the auxiliary power system of the Richmond Generating Station of the Philadelphia Electric Company, mentioning briefly some of the factors which influenced the design of the system and discusses the starting of large motors at full voltage from an auxiliary turbine generator. View full abstract»

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  • Abridgment of directional ground relay protection of high-tension isolated neutral systems

    Publication Year: 1927, Page(s):1184 - 1192
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1788 KB)

    This paper discusses the problem of obtaining selective relay protection in case of accidental grounds on high-tension isolated neutral systems. A relay was developed whose overcurrent element operates on the residual charging current which exists when a ground occurs on such a system, and whose directional element is operated by residual charging current and residual voltage. Two schemes can be e... View full abstract»

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  • Abridgment of the electric arc

    Publication Year: 1927, Page(s):1192 - 1200
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2044 KB)

    DEFINITION OF ARC. An arc is a discharge of electricity, between electrodes in a gas or vapor, which has a voltage drop at the cathode of the order of the minimum ionizing or minimum exciting potential of the gas or vapor. ARC CHARACTERISTICS. The relation of arcs to glow discharges and coronas is illustrated by discussion of “generalized” curve of the gas discharge characteristic. E... View full abstract»

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  • Abridgment of catenary design for overhead contact systems

    Publication Year: 1927, Page(s):1200 - 1201
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (517 KB)

    THE rational mechanical design of any overhead contact system must be based upon certain fundamental rules of mechanics, usually those dealing with statics, or forces in equilibrium, applied to the physical characteristics of the track alinement. Theoretically a problem for the civil engineer, the general solution and detailed application of the design has been assigned to the electrical engineer ... View full abstract»

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  • Application and design of load ratio-control equipment

    Publication Year: 1927, Page(s):1202 - 1206
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3531 KB)

    Load ratio control of transformers, which means the possibility of changing the transformation ratio without interrupting the load, has found very rapid adoption on account of its wide application possibility. It provides the long sought solution for a voltage regulation on industrial loads and large blocks of power, and enables a perfect tie-in operation of two or more power systems with any desi... View full abstract»

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  • Electricity as applied to the petroleum industry

    Publication Year: 1927, Page(s):1207 - 1208
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (815 KB)

    WITHIN the last few years rapid strides have been made toward electrification of the petroleum industry. The trend is definitely toward the use of this form of power for all purposes except heating. Motors and attendant equipment are but the first links in this chain of power supply — distribution lines, substations, transmission lines, and the central generating station must increase great... View full abstract»

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  • Drone of airplane illuminates landing field

    Publication Year: 1927, Page(s): 1208
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (342 KB)

    No longer will it be necessary to keep airplane landing fields brilliantly lighted all night when a new invention only recently demonstrated is perfected to the point of being manufactured in quantity. The noise made by the hum of an airplane 1000 ft. in the air closed the switch that lighted a bank of flood lights at Bettis Field, McKeesport, in the first demonstration of the sound sensitive auto... View full abstract»

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  • Development of automatic switching: Equipments in the United States and Europe

    Publication Year: 1927, Page(s):1209 - 1214
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4875 KB)

    This paper gives a brief outline of the history and general development of automatic switching equipments in the United States and Europe, as applied to power equipment. A general review is made of the advantages of automatic equipments, consisting not only of a saving in operating expenses, but also of better operating characteristics as compared with manually controlled stations. The various des... View full abstract»

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  • Transformer tap changing under load

    Publication Year: 1927, Page(s):1214 - 1221
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4274 KB)

    Changing the voltage ratio of transformers under load is now a recognized and established procedure. Methods of changing taps under load are discussed, illustrated and compared. Equipment for obtaining smooth curve voltage control is discussed, as well as combination voltage and phase-angle control. View full abstract»

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  • Recent investigation of transmission line operation

    Publication Year: 1927, Page(s):1221 - 1229
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3345 KB)

    This paper discusses transmission line operating experience on the 140,000-volt isolated neutral system of the Consumers Power Company, Michigan. Careful inspections and tests have been made to determine the conditions existing relative to insulator flashover and the findings and results are shown by tables and curves. Ground resistance or soil conditions appear to have a very decided effect on th... View full abstract»

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  • Abridgment of the collection of current from overhead contact wires

    Publication Year: 1927, Page(s):1229 - 1237
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6224 KB)

    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 800 to 800 amperes in heavy inter urban 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 ca... View full abstract»

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  • Two cases of calculation of mechanical forces in electric circuits

    Publication Year: 1927, Page(s):1238 - 1240
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (559 KB)

    A formula is derived for the mechanical force in a circle of round wire, due to its own current. A formula, F = I2 logh a1/a2, is also derived for the longitudinal force exerted on a round conductor, due to its own current, where it changes its diameter. Where there is a constriction in a liquid conductor, this force acts in both directions away from the con... View full abstract»

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  • Electrical machinery: Annual report of the committee on electrical machinery

    Publication Year: 1927, Page(s):1241 - 1262
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (11658 KB)

    To the Board of Directors: This committee has carried on its work during the past year according to the general plan of organization which has been in force for the past three years. The membership of the committee has been materially increased over the number of last year in an endeavor to be prepared to handle the increasing amount of work naturally resulting from the rapid growth in quantity, s... 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):1263 - 1268
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1178 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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  • Discussion at Pittsfield

    Publication Year: 1927, Page(s):1269 - 1273
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    E. F. Gehrkens: The subject of voltage control is an exceedingly important one and it was so recognized as far back as 1882, at which time an automatic generator voltage regulator for d-c. machines was developed. View full abstract»

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  • Discussion at Summer convention: Electrical reproduction from phonograph

    Publication Year: 1927, Page(s):1273 - 1274
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (628 KB)

    C. R. Hanna: In the paper by Mr. Kellogg no mention has been made of factors which determine the sensitivity of the pickup device other than that mass has something to do with it. This statement is made: “The foregoing comparison of magnetic systems does not take into account the possible power output of the winding, nor is the elastic stiffness required to hold the armature in its mean pos... View full abstract»

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Aims & Scope

The Journal of the American Institute of Electrical Engineers (AIEE) contains articles published between 1924 and 1930. Contents are devoted to the advancement of theory and practice of electrical engineering and the allied arts and sciences.

This Journal ceased publication in 1930. The current retitled publication is IEEE Spectrum.

Full Aims & Scope