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American Institute of Electrical Engineers, Transactions of the

Issue 1 • Date Jan. 1935

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Displaying Results 1 - 25 of 28
  • [Breaker page]

    Page(s): nil1
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    Freely Available from IEEE
  • [Breaker page]

    Page(s): nil2
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    Freely Available from IEEE
  • Preface [Transactions to contain entire content of 12 monthly 1935 issues of "Electrical Engineering"]

    Page(s): nil3
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    Freely Available from IEEE
  • Errata

    Page(s): nil4
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    Presents revisions to various equations and formulas from selected articles. View full abstract»

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  • List of Contributors

    Page(s): 1
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  • Table of contents

    Page(s): 1 - 2
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  • [Advertisement]

    Page(s): 2
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  • X Rays-What should we know about them?

    Page(s): 3 - 14
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    Most engineers are familiar with some of the more common uses of X rays, and many have had occasion to apply them in their daily work; to many, however, the picture of this versatile tool and its numerous applications in quite incomplete. The latter will find this article particularly interesting and instructive. The nature of these rays, the mechanism of their production, and the fundamental principles underlying their many applications in medicine, physics, chemistry, biology, and industry are outlined briefly. Perhaps the most striking application is the determination of the ultimate fine structure of materials from the results of diffraction analysis, in which the X rays provide a supermicroscopic vision of matter. This is the thirteenth and concluding article of the "Science Series for Engineers" developed under auspices of the A.I.E.E. committee on education. View full abstract»

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  • Standardization of Noise Meters

    Page(s): 14 - 15
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    A brief review of the present status of standardization of noise meters and measurements and progress made to date by the technical committee on noise meters and noise levels of the American Standards Association. View full abstract»

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  • Engineering in the Social Sciences

    Page(s): 16 - 20
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    A successful manufacturing engineer looks at the social sciences. He points out that ``all wealth is produced from land by the application of labor aided by capital.'' In order that every one might have an opportunity of securing his rightful share of land, a new system is proposed wherein every community would collect all community-created ground rent and all taxation on wealth would be abolished. View full abstract»

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  • Quieting Substation Equipment

    Page(s): 20 - 26
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    With the aid of sound measurements made with an analyzing type of sound meter, it has been possible to ascertain the principal sources of noise in an electric power substation in a residential district and to reduce the noise to an unobjectionable level. The principal sources of noise were found to be an outdoor 6,000-kva transformer and the voltage regulators inside building; by replacig the noisy transformer with a quieter one and replacing the ventilating louvers in the regulator rooms with steel plates the noise on neighboring properties was reduced to about 4 per cent of its original loudness. View full abstract»

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  • Wide Band Transmission Over Balanced Circuits

    Page(s): 27 - 30
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    Equipment for handling frequency band widths of the order of 1,000,000 cycles or more for telephone, telegraph, and television purposes was described in a recent Institute paper ``Wide Band Transmission Over Coaxial Lines.'' This previous paper confines itself to the coaxial line structure, but points out that broad band transmission is also applicable to balanced conductor systems. The present paper discusses briefly some of the possibilities of the more familiar balanced circuits, circuits essentially as they now exist in the present plant being first considered, following which are considered circuits obtained by new construction. Wide band transmission over balanced circuits offers interesting possibilities both in the present plant and for new construction. View full abstract»

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  • Cable System Neutral Grounding Impedance

    Page(s): 30 - 40
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    Determination of the permissible neutral resistance or reactance for the grounding of cable systems for 3 phase power supply is considered in this paper. The theory of overvoltages which may arise as a result of lative action is discussed, and a description of the method for calculating these voltages is given. A simplified criterion for determining the value of neutral resistance or neutral reactance for limiting the over-voltages is proposed which permits the use of higher values than any preceding method. View full abstract»

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  • Industrial Electronic Control Applications

    Page(s): 40 - 49
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    Electronic tubes are being applied in rapidly increasing numbers in the solution of industrial control problems. A review of several of the most frequently encountered types of problems to which these tubes are being applied is presented herewith. These include photo-electric control applications, electronic relays, electronic regulators, and a welding timer for seam welding. View full abstract»

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  • Dielectric Strength of Mineral Oils

    Page(s): 50 - 55
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    The correlation of the pressure and temperature effects in determining the dielectric strength of mineral insulating oils is considered in this paper. The effect which gas dissolved in the oil has on the dielectric strength of the oil is shown by experimental results of tests on the effect of temperature and pressure. Based upon these results, simple formulas for expressing the dielectric strength of oil are obtained. View full abstract»

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  • Noise Measurements for Engineering Purposes

    Page(s): 55 - 65
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    The 2 principles of noise measurement, namely, the subjective and objective principles, are discussed in this paper with special reference to electrical plant. Two forms of measurement embodying the subjective principle are considered: One is the proposed primary standard method, which is essentially a laboratory method; the other is the noise audiometer, which enables the subjective principle to be applied directly to the study of engineering noise problems. A form of audiometer and technique, together with their practical advantages, are described. The objective method of measurement is particularly needed for commercial acceptance tests. The evidence shows that the objective type of instrument now available evaluates the noise of many types of plant correctly, but that with noises predominantly harmonic in tone structure, the principle of the method is inapplicable. It is concluded that the audiometer provides the only practicable means at present available for measuring transformer noise and that no satisfactory solution for the commercial testing of such apparatus has yet been reached. View full abstract»

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  • Expulsion Protective Gaps on 132 Kv Lines

    Page(s): 66 - 73
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    During the last few years, the expulsion protective gap, consisting of an arrangement of spark gaps inside of fiber tubes and in series with an external gap, has been applied to a few medium voltage transmission lines for protection against outage due to lighting. The first extensive application of such gaps on 2 typical 132 kv lines during the past 2 lightning seasons are presented herewith. These expulsion protective gaps are shown to be an effective device for preventing lightning flashovers of a line and reducing line outage. View full abstract»

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  • Transient Voltages on Bonded Cable Sheaths

    Page(s): 73 - 82
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    Field experience and tests show that unexpectedly high transient sheath voltage occur during the switching of charging current in single-conductor cable-type bus leads and in underground single-conductor power transmission cables bonded to eliminate sheath losses. No sheath troubles from these voltages have been found. Theoretical analysis of these voltages is presented together with suggested methods for protection of equipment, when the latter is necessary. View full abstract»

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  • Application of Electron Tubes in Industry

    Page(s): 82 - 92
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    Several of the circuits and principles of application of the various types or electron tubes in industrial control are considered in this paper. Principal consideration is given to the various types of photo-electric control, electron tube-reactor theater lighting control electron tube motor control, trol, and electron tube welder control. Principles intended as guides in the selection of the proper tube circuits are given. View full abstract»

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  • Use of Vacuum Tubes in Measurements

    Page(s): 93 - 102
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    For the benefit of those who may wish to use vacuum tubes in meeting specific problems in the field of measurement, the comprehensive bibliography contained in this paper has been prepared. Some 600 references are included in this list, selected from a total of about 1,500 papers or books published since approximately 1920. The first portion of the bibliography contains publications dealing with the characteristics of vacuum tubes, and the second portion contains references to specific applications to measurement problems. View full abstract»

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  • Constant-Current D-C Transmission

    Page(s): 102 - 108
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    High voltage d-c electric power transmission has been envisioned for many years, but numerous obstacles have prevented its use to any great extent. Most of these obstacles appear to be over come in the system described in this paper; this system comprises conversion of constant-potential a-c power to constant-current d-c power, transmission of constant-current d-c power and reconversion to constant-potential a-c power. The promising features of this system are its unusual stability and reliability; as an example, the high-voltage constant-current d-c line may be short-circuited without damage to line or equipment. View full abstract»

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  • A Carrier Current Relay Installation

    Page(s): 109 - 115
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    Operating experience obtained during 2 lightning seasons with an installation of carrier current relays on a New England power system is presented herewith. A r??sum?? of the reasons for the choice of this type of protection also is given, and the relay and carrier current equipment is described. View full abstract»

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  • Ultra-Short Waves in Urban Territory

    Page(s): 115 - 124
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    This paper extends a previous paper on the investigation of ultra-short wave propagation, to include transmission within a built-up region together with a consideration of the additional problems introduced by man-made interference. Test were made using both a fixed transmitter with mobile receiver, and a mobile transmitter with a fixed receiver. View full abstract»

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  • News of Institute and related activities

    Page(s): 125 - 135
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  • Letters to the Editor

    Page(s): 135 - 142
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