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Electrical Engineering

Issue 6 • Date June 1931

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Displaying Results 1 - 25 of 26
  • [Front cover]

    Publication Year: 1931, Page(s): c1
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  • [Advertisement - Front inside cover]

    Publication Year: 1931, Page(s): c2
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  • Contents

    Publication Year: 1931, Page(s):1 - 2
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  • Future meetings of the American Institute of Electrical Engineers

    Publication Year: 1931, Page(s): 1
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  • The primary network for medium-load areas

    Publication Year: 1931, Page(s):400 - 404
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (758 KB)

    As a result of the noteworthy economic and operating success of the secondary a-c. network the same principle now is proposed for relatively high-voltage primary systems. Based upon economic studies of two Pittsburgh residential areas one primary network now is under construction there and a second all planned. Major details involved are given here and ten distinct advantages are enumerated. View full abstract»

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  • Vacuum tubes and their applications

    Publication Year: 1931, Page(s):404 - 405
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (325 KB)

    The extensive use of the high-vacuum tube in radio and communication work has resulted from certain remarkable characteristics of these tubes; the “thyratron” has been shown to possess certain other characteristics which mark it as being equally well suited to industrial uses. View full abstract»

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  • What are effects of electric shock?

    Publication Year: 1931, Page(s):406 - 410
    Cited by:  Papers (1)
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    Are brain cells injured when currents do not pass through the head? What influence upon life continuity does the current path through the body have? In an effort to approach an answer to these and related questions a second set of experimental data is given herewith. View full abstract»

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  • Electric power in the steel industry

    Publication Year: 1931, Page(s):410 - 411
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (282 KB)

    A brief outline of some of the revolutions in production methods brought about by electrification on a large scale. View full abstract»

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  • A neutralized welding generator

    Publication Year: 1931, Page(s):412 - 414
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (451 KB)

    By reducing the magnetic energy stored in the generator field, transient currents in d-c. welding machines can largely be eliminated. Providing such generators with neutralizing windings reduces this energy to a minimum. View full abstract»

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  • Some effects of unbalanced faults

    Publication Year: 1931, Page(s):415 - 420
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (826 KB)

    Line-to-ground voltage in three-phase grounded-neutral electric power systems under fault conditions often may be greater than the line-to-line voltage. This and numerous other important relations are shown by an investigation of the wide range of power-system voltages and currents existing under fault conditions. View full abstract»

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  • Fundamental basis for distance relaying

    Publication Year: 1931, Page(s):420 - 422
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (409 KB)

    For single-line protection, with the exception of pilot-wire, or superposed high-frequency methods, distance relays form the nearest approach to the theoretically ideal system. Except for errors due to fault resistance, these relays operate accurately according to the relative distance to faults. View full abstract»

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  • Shallenberger personal memoranda discovered

    Publication Year: 1931, Page(s): 422
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (188 KB)

    A MEMORANDUM of Oliver B. Shallenberger, personally handwritten, and recently come to light, gives an interesting glimpse of the electrical business forty years ago. The man who left this penciled notation was one of the pioneer electrical engineers of the then infant Westinghouse company and was active in many major projects that did much to shape the course of the industry. View full abstract»

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  • Power supply for telephone service

    Publication Year: 1931, Page(s):423 - 426
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (673 KB)

    Automatic regulating and control equipment is finding increasing use in telephone power plants, giving more exact performance, increased reliability and reduced maintenance. Certain regulating equipment and a few of the unit-type automatic power plants recently developed are described. View full abstract»

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  • Helical grooves in slip-rings and commutators

    Publication Year: 1931, Page(s):427 - 429
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (429 KB)

    Current-collection problems can be simplified to a marked degree by helical grooves cut into the surfaces of commutators and slip-rings. Results of comparative tests before and after grooving are presented herewith. View full abstract»

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  • The calculation of generator heat losses

    Publication Year: 1931, Page(s): 429
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (113 KB)

    Predetermination of the temperature in electrical machinery involves three distinct problems: (1) magnitude and distribution of the losses, (2) flow and cooling effect of the cooling medium in the machine, and (3) heat flow from source to cooling medium. View full abstract»

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  • Synchronizing salient-pole motors

    Publication Year: 1931, Page(s):430 - 431
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (279 KB)

    By means of the integraph the differential equation of motion for a synchronous motor during pulling-into-step transients is readily solved. An expression thus can be set up to predetermine the limiting conditions under which such a motor will synchronize. View full abstract»

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  • A concentrator for printing-telegraph circuits

    Publication Year: 1931, Page(s):431 - 434
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    The termination in a telegraph office of a large number of “start-stop” printing telegraph circuits, requires some means for concentrating the circuits to enable incoming and outgoing traffic to be handled efficiently and economically. A multipleturret concentrator which permits any one of many circuits to be worked by any one of a few operators is described here. View full abstract»

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  • Brazed joints for electric conductors

    Publication Year: 1931, Page(s):434 - 436
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (459 KB)

    Electric resistance brazing produces in electric conductors joints which possess several distinct advantages over equivalent soldered joints, and in addition can be made at a lower cost. A description of the equipment and process is given with comparative results between the two types of joints. View full abstract»

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  • A vacuum-tube voltage regulator

    Publication Year: 1931, Page(s):436 - 438
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (508 KB)

    A device has been developed which not only provides voltage regulation for alternators, but short-circuit protection as well. Saturation current from the filament of a thermionic tube forms the control element, while stabilization is accomplished by a feed-back system. View full abstract»

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  • Motive power for suburban electric lines

    Publication Year: 1931, Page(s):438 - 439
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (293 KB)

    Low annual car mileage together with the large number of cars required make the economical handling of suburban passenger traffic difficult. Results of a comprehensive analysis of the problem are presented. View full abstract»

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  • News of Institute and related activities

    Publication Year: 1931, Page(s):440 - 453
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  • Local meetings

    Publication Year: 1931, Page(s):454 - 459
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  • Employment notes of the engineering societies employment service

    Publication Year: 1931, Page(s):459 - 461
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  • Membership

    Publication Year: 1931, Page(s):461 - 462
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  • Engineering literature

    Publication Year: 1931, Page(s):462 - 467
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Aims & Scope

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

Full Aims & Scope