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Electrical Engineering

Issue 4 • Date April 1933

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Displaying Results 1 - 25 of 32
  • [Front cover]

    Page(s): c1
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    Freely Available from IEEE
  • [Front inside cover]

    Page(s): c2
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    Freely Available from IEEE
  • Contents

    Page(s): 219 - 220
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  • Cosmic rays — What physicists have learned about them

    Page(s): 221 - 228
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    “Cosmic rays” is the name applied to the ultimate cause of that part of the ionization of the air that cannot be ascribed to any known agencies. In spite of this prosaic definition, however, seldom if ever has there been a subject of research in physics in which intrinsic importance and romantic associations so happily are combined. In view of the fundamental importance of cosmic ray research, in this article is given a review of studies made in this engrossing field from the time of early experiments with the gold leaf electroscope down to the present day of many and conflicting theories and speculations. View full abstract»

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  • Lightning experience with new transformer connection

    Page(s): 229 - 232
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    Distribution transformers in several locations on a New England system have been operating for several months with the primary lightning arrester ground interconnected with the transformer secondary neutral. Experience over the past few months definitely indicates the advantages of this connection in reducing troubles due to lightning, without increasing the hazard to the customers' wiring. Increased clearances on transformer primary bushings also reduce the number of failures. View full abstract»

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  • The Oberhasli hydroelectric development

    Page(s): 233 - 234
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    IN SWITZERLAND, the country of the “white coal” as electricity is called there, another important electrification has been accomplished by the construction of a large seasonal storage plant, the Oberhasli hydroelectric development above Meiringen in the Bernese Oberland. Construction work on the first step of this project was completed recently and the Handeck generating station was placed in regular operation on October 1, 1932. View full abstract»

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  • Private versus public enterprise

    Page(s): 234
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    AN ADDRESS “The Era of Public Enterprise” was delivered by Walter Rautenstrauch, professor of industrial engineering, Columbia University, New York, N. Y., at a meeting of the Advertising Club of New York, held March 1, 1933, in that city. Following Professor Rautenstrauch's address, which extolled the benefits expected from increased public enterprise, an address was given by Dr. Virgil Jordan, president, National Industrial Conference Board, Inc., New York, N. Y., in which the case for private enterprise was argued. Excerpts from these 2 addresses follow. These conflicting views are published without editorial comment, in the hope that, between them, the readers of ELECTRICAL ENGINEERING may find constructive suggestions and be stimulated to further ideas. Comments, criticisms, and suggestions are invited, as “letters to the editor” they will be considered for possible publication. View full abstract»

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  • I — Public enterprise

    Page(s): 234 - 236
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    THE MANY suggestions for the solution of our economic difficulties put forward during the past 3 years of the depression are so varied in their proposals and in the principles underlying them that it seems almost hopeless for us to arrive at any concerted action to get us out of our difficulties. This seems to be due to 2 causes: First, an entire lack of common understanding of basic economic principles; and second, a lack of vision on the part of many people to see beyond the horizon of their limited and confining experiences. View full abstract»

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  • II — Private enterprise

    Page(s): 236 - 237
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    THE REAL difficulty with the pattern of public enterprise, the idea of having a government of any sort, whether of engineers, economists, or Tammany politicians, run our industries and businesses in an orderly fashion lies in this simple fact: We, as a people, and as individuals, are not made in the way we would have to be to fit into the pattern. Perhaps we can be made to fit some day, but that is a question of eugenics, not of economics or engineering. View full abstract»

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  • Sheath grounds affect traveling waves in cables

    Page(s): 238 - 239
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    Traveling waves may appear in power cables connected to high voltage transmission lines. The differences in voltage that will appear between the conductor and sheath of a cable at various points depend upon the nature and location of the cable sheath grounds. A few of the results of a considerable number of tests made to determine their effect are presented in this article, and some conclusions regarding protective measures are drawn. View full abstract»

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  • Conductor vibration from wind and sleet

    Page(s): 240 - 242
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    Conductors on electric power transmission lines have been observed to vibrate with amplitudes as great as 20 ft during sleet storms with the temperature just below freezing, and with a heavy wind blowing transversly across the line. An explanation of this phenomenon is given. View full abstract»

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  • Modern steel tower transmission lines

    Page(s): 243
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    Some important requirements for modern steel tower transmission lines are presented in the following outline prepared by Group II of the A.I.E.E. subcommittee on steel transmission towers and conductors. This material is intended as a general guide to designers and is not a specification. Clearances, mechanical reliability, strength against lightning, and prevention of vibration, are considered. View full abstract»

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  • Non-linear circuits applied to relays

    Page(s): 244 - 246
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    In this article are described applications of simple series and parallel non-linear electrical circuits to a-c voltage and current relays; such relays are characterized by great sensitivity. The special properties of the resonant-current relay make it especially adaptable for use as an undercurrent or undervoltage relay. View full abstract»

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  • Some new ideas in circuit breaker design

    Page(s): 247 - 248
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    IN THE LIGHT of the present trends that are influencing the design, application, and operation of circuit breakers in electric power systems it seems reasonable to expect that the satisfactory circuit breaker of the future must have the ability to interrupt, in a few cycles and with minimum arcing, a circuit carrying a large load, and do this effectively without the use of oil. In the course of electrical engineering work at the University of Colorado, the authors developed 2 circuit breaker designs which show possibilities of incorporating the several desirable features requisite in a satisfactory circuit breaker. One design is an air-stream circuit breaker operating with compressed air, the other a vapor-blast circuit breaker operating with the use of ordinary water. View full abstract»

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  • A high speed reactance relay

    Page(s): 248 - 252
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    A high speed relay for the protection of transmission lines has been developed which uses the induction dynamometer principle for the production of torque. This relay operates on the reactance principle. Details of the relay and its operating characteristics are presented herewith. View full abstract»

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  • The parallel type of inverter

    Page(s): 253 - 256
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    Among the many interesting and valuable applications of that versatile device, the 3-electrode hot-cathode gas-filled thermionic tube, is the inverter. Of the several different types of circuits developed, the “parallel” type gives promise of becoming of some importance, and already has been used commercially for supplying power to a-c radio sets from d-c systems. This article gives an analysis of the operation of this type of inverter under different load conditions. View full abstract»

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  • Engineers and progress

    Page(s): 257 - 258
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    Periodically mankind has bewailed the end of substantial progress, repeatedly to find that the apparent end was in fact a beginning. Quotations from the published works of previous eras are given in substantiation of the maintenance of a constructive, forward-looking attitude in spite of present awesome difficulties. View full abstract»

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  • What is reactive power?

    Page(s): 259
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    ONE FEATURE of the Institute's North Eastern District meeting to be held in Schenectady, N. Y., May 10–12, 1933, is a symposium on reactive power, held under the chairmanship of A. E. Knowlton. An introduction to this symposium prepared by Mr. Knowlton is presented herewith, following which are the 2 papers of the symposium available and approved in time for publication in this issue. One of these, by J. Allen Johnson, is written from the practical point of view, and the other, by V. G. Smith, is written from the theoretical point of view. Although these 2 papers do not cover all of the many factors involved in the discussion on reactive power, they are representative of different schools of thought. View full abstract»

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  • I — Reactive power concepts in need of clarification

    Page(s): 259 - 262
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    To assist in clarifying the present concepts of reactive power, the following introduction to the subject has been prepared. An analysis of the reactive conventions made by Doctor Silsbee, a member of the subcommittee, is included. View full abstract»

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  • II — Operating aspects of reactive power

    Page(s): 262 - 268
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    “Reactive power” is discussed in this article from the point of view of the practical operating engineer. The direction of flow in a transmission line of this reactive power with respect to the “active” power is shown to determine whether the current lags or leads the voltage. It is urged that only one kind of reactive power (lagging) be recognized, and that its direction of flow be considered. A simplification of system operating problems is claimed to result from this view. Use of the symbol rkw is urged. View full abstract»

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  • III — Reactive and fictitious power

    Page(s): 268 - 270
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    The single-phase and polyphase definitions of reactive power are considered in this article. It is shown that the single-phase definition is unsatisfactory with complex waves. The polyphase definition is better, but requires independent recognition of distortion and mesh distribution. A distinction is made between fictitious power and reactive power. View full abstract»

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  • News of Institute and related activities: North Eastern district to meet at Schenectady

    Page(s): 271 - 273
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  • A.I.E.E. executive committee meeting

    Page(s): 273
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  • Chicago exposition — A Summer convention attraction

    Page(s): 273
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  • Summarized review of some Winter convention discussions

    Page(s): 274 - 277
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Aims & Scope

This Periodical ceased publication in 1963. The current retitled publication is IEEE Spectrum.

Full Aims & Scope