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Electrical Engineering

Issue 9 • Date Sept. 1950

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Displaying Results 1 - 25 of 40
  • [Front cover]

    Publication Year: 1950, Page(s): c1
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  • [Advertisement - Front inside cover]

    Publication Year: 1950, Page(s): c2
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  • Contents

    Publication Year: 1950, Page(s): 1A
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  • [Advertisement]

    Publication Year: 1950, Page(s): 2A
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  • Highlights

    Publication Year: 1950, Page(s): 3A
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  • [Advertisement]

    Publication Year: 1950, Page(s):4A - 12A
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  • Dielectrics in electrical engineering

    Publication Year: 1950, Page(s):771 - 773
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (565 KB)

    CLASSICAL electrical engineering views matter from the standpoint of Maxwell's theory as a means of storing electric and magnetic energy and of dissipating such energy by conduction and other irreversible processes. It considers, for any given material, these properties of storage and dissipation as fixed quantities which may be tabulated under the headings: permittivity (dielectric constant), per... View full abstract»

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  • Relaying practices of the Bureau of reclamation

    Publication Year: 1950, Page(s): 774
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (209 KB)

    HIGH-VOLT AGE transmission systems serving the western part of the United States are characterized by longer line sections between substations than is common in the East where population density is greater. Relaying of power systems of the Bureau of Reclamation, United States Department of the Interior, presents, therefore, somewhat different problems than usual. View full abstract»

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  • Electric ticket-reserving system

    Publication Year: 1950, Page(s):775 - 780
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    STEADILY increasing difficulties have marked the expansion of the reservation systems of railroads and air lines over the past two decades. This may in large part be due to the greater number of people traveling today, to the increased speed of the vehicles, and perhaps also to the efforts that the carriers have made in supplying a large variety of accommodations. A large railroad can provide 12 d... View full abstract»

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  • High-voltage rectifier equipment for tube testing

    Publication Year: 1950, Page(s): 781
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (197 KB)

    MERCURY-ARC rectifier equipment of high capacity and voltage rating and special design for tube-testing service has been installed in the RCA-Victor Company Advanced Development Laboratory at Lancaster, Pa. The equipment provides 2,000 kw at 12,000 volts d-c with two rectifier units connected in parallel, and 2,000 wk at 24,000 volts d-c with the two units in series. In each case, the d-c windings... View full abstract»

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  • Failures of rubber insulation caused by soil microorganisms

    Publication Year: 1950, Page(s):782 - 787
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    THE INVESTIGATION of the cause of the rare failures of nonleaded rubber-insulated cables buried directly in the ground was reported in an earlier paper.1 These failures were characterized by localized regions of very low insulation resistance. The absorbed water content was no greater than in adjacent regions of high insulation resistance, and the physical properties were usually normal... View full abstract»

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  • Conversion unit for projecting 3- by 4-foot television pictures

    Publication Year: 1950, Page(s):788 - 792
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (778 KB)

    PRIOR TO THE advent of common television usage, pictures in the home became popular by the use of home-movie projectors. By a process of evolution the 3- by 4-foot home-movie picture size became an accepted one. These facts would indicate a preference for picture sizes of this order, at least for some types of picture presentations. View full abstract»

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  • Underground hydroelectric power stations

    Publication Year: 1950, Page(s): 793
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (176 KB)

    THE NATURAL waterfalls in Sweden are often very extended in length. The utilized head in the power stations is frequently less than 150 feet and only in rare cases exceeds 300 feet. The mean flow of water in the bigger rivers amounts to about 10,000 cubic feet per second at the mouth. Kaplan turbines have been used for heads up to 110 feet; for greater heads, Francis turbines are used. View full abstract»

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  • Perception of electric currents

    Publication Year: 1950, Page(s):794 - 800
    Cited by:  Papers (1)
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    ELECTRIC CURRENTS which are just perceptible are important, as it is essential that the user not get the sensation of electric shock when using electric appliances, hand tools, or other electric equipment.1 Shocks produced by currents near the threshold of perception are generally considered annoying rather than dangerous; however, when such shocks are unexpected, they are startling, an... View full abstract»

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  • Audible noise of power transformers

    Publication Year: 1950, Page(s):800 - 805
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    TRENDS in power-system design require installations of large power transformers in thickly populated areas. These trends have been brought about by increasing capacities of existing stations and by transforming power closer to the ultimate customer than has been done in the past.1 As a result, power-transformer manufacturers have been asked to build low-noise-level designs for these ins... View full abstract»

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  • Microwave gas discharges

    Publication Year: 1950, Page(s):806 - 809
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    The microwave gas discharge has presented a new field for physical exploration. The r e sults of some of these experiments are given here; processes active in a microwave gas discharge are discussed, and a formula is developed for the complex conductivity of the discharge from the known properties of electrons and ions. View full abstract»

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  • Construction of cold-cathode counting or stepping tubes

    Publication Year: 1950, Page(s):810 - 813
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (700 KB)

    ELECTRONIC digital counters have satisfactorily solved the problem of counting at speeds which are too great for mechanical or electromagnetic counters. These high-speed counters usually employ chains of trigger devices such as hot-cathode multivibrators1 or cold-cathode glow discharge tubes.2 Coupling between elements in the chain is arranged so that the triggering of one el... View full abstract»

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  • Modern servomechanism testers

    Publication Year: 1950, Page(s):814 - 816
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    DURING recent years the so-called steady-state or frequency response method of evaluating the performance of linear servomechanisms has gained increasing favor over transient response methods.3 The essential reason for this is the relative ease of inferring the frequency response of a complicated system from the frequency responses of its components. View full abstract»

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  • Ferromagnetic domains

    Publication Year: 1950, Page(s):817 - 822
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1116 KB)

    A FERROMAGNETIC crystal is composed of small regions or domains which are magnetized to saturation. When the crystal is unmagnetized the domains are arranged so that the net magnetization is zero. The application of a magnetic field changes the domain structure. The domains that are favorably oriented with respect to the applied field grow at the expense of those less favorably oriented, so that t... View full abstract»

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  • Pulse measuring of deionization time

    Publication Year: 1950, Page(s):823 - 827
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB)

    A NECESSARY condition for the initiation of an electric discharge between two electrodes immersed in a gas is that the voltage difference between the electrodes be greater than a critical value called the breakdown voltage. The nature and pressure of the gas and the shape, separation, and nature of the electrodes determine this critical value. When a gas tube breaks down or fires, a positiveion sp... View full abstract»

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  • Use of the current transductor in the aluminum industry

    Publication Year: 1950, Page(s):828 - 832
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    THE CURRENT transductor is one of the great family of apparatus known variously as magnetic amplifiers, saturable core reactors, or transductors. These devices are a-c inductors, whose effective inductance can be changed by superimposing a d-c magnetomotive force. The current transductor is a transductor specially designed and calibrated so that the alternating current flowing in the a-c circuit i... View full abstract»

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  • Officers and committees for 1950-51

    Publication Year: 1950, Page(s):833 - 841
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  • Institute activities: Tentative technical program released for middle Eastern district meeting

    Publication Year: 1950, Page(s): 842
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  • Middle Eastern district meeting, Baltimore, October 3-5

    Publication Year: 1950, Page(s):843 - 845
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  • AIEE board of directors holds regular meeting in Pasadena

    Publication Year: 1950, Page(s): 845
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Aims & Scope

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

Full Aims & Scope