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Electrical Engineering

Issue 10 • Date Oct. 1939

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Displaying Results 1 - 25 of 41
  • [Front cover]

    Publication Year: 1939, Page(s): c1
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  • [Advertisement - Front inside cover]

    Publication Year: 1939, Page(s): c2
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  • [Advertisements]

    Publication Year: 1939, Page(s):1 - 6
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  • Contents

    Publication Year: 1939, Page(s): 1
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  • Highlights

    Publication Year: 1939, Page(s): 406
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  • Union pacific's new steam-electric locomotive

    Publication Year: 1939, Page(s):407 - 413
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (8353 KB)

    The need for faster railroad schedules has necessitated the development of new motive-power units capable of sustained high-speed operation. Newest entrant in that realm is the steam-electric locomotive recently placed in operation by the Union Pacific Railroad. View full abstract»

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  • Mechanical demonstrator of traveling waves

    Publication Year: 1939, Page(s):414 - 420
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4871 KB)

    By means of the device described in this article, which simulates in a mechanical sense the electrical phenomena of traveling waves on power-transmission lines, various types of surges may be visualized and relations fundamental in transmission theory may be deduced. View full abstract»

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  • Simplified computation of voltage regulation: With four-winding transformers

    Publication Year: 1939, Page(s):420 - 421
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (293 KB)

    COMPUTATIONS of voltage regulation ordinarily are based on the use of an equivalent circuit for the four-winding transformer, using either a six-branch network, or preferably the eight-branch network described by Starr.1 Determination of the equivalent circuit — a tedious analytical task — appears to be unnecessary, however. As a simpler alternative for determining voltage... View full abstract»

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  • Service voltages for lighting

    Publication Year: 1939, Page(s): 421
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (105 KB)

    THE General Electric Company's annual analysis of population reported as being served at various lighting voltages shows a continued shift toward 120 volts, with decreases in both the 115- and the 110-volt percentages. The percentage of population receiving lighting service at 125 and 130 volts is almost negligible (actually less than one-tenth of one per cent) and shows no sign of increasing. The... View full abstract»

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  • Why so few famous engineers today?

    Publication Year: 1939, Page(s): 422
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  • Effects of technology on our social thinking

    Publication Year: 1939, Page(s):423 - 426
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    The many and varied successes in technology have inspired in the minds of millions unskilled in technological methods the belief that such methods are directly applicable to social problems. The engineer should be the first to recognize the danger in this misconception and should do what he can to educate and warn the lay public that principles applicable to his inanimate problems cannot be applie... View full abstract»

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  • World telephone statistics

    Publication Year: 1939, Page(s): 426
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (135 KB)

    OF THE 37,098,084 telephones in service on January 1, 1937, approximately one-half, or 18,433,400, were in the United States, according to a survey recently compiled by the American Telephone and Telegraph Company. By continents, there were 19,952,423 in North America, 13,513,152 in Europe, 1,690,978 in Asia, 840,880 in Australia and other Pacific Islands, 765,435 in South America and 335,216 in A... View full abstract»

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  • Electricity as an industrial fire hazard

    Publication Year: 1939, Page(s): 427
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    OF ALL FIRES in the United States and Canada during the years 1936 and 1937 (excluding those where lightning was the initial cause) 11.2 per cent were of electrical origin, and the loss was 10.9 per cent of all fire loss. These figures from the records of the National Fire Protection Association indicate that for all types of property, electricity ranked third as a cause of fire. The records of th... View full abstract»

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  • Optimum voltage for airplanes

    Publication Year: 1939, Page(s):428 - 431
    Cited by:  Papers (7)
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    Standardization of aircraft equipment is desirable when such standardization does not interfere with efficient operation. Equations developed for the standardization of electrical equipment indicate that the voltage for a large number of airplanes with d-c systems using storage batteries to carry peak loads can be standardized advantageously at 24 volts. View full abstract»

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  • Transactions supplement for 1939 to be issued soon; its contents are outlined here

    Publication Year: 1939, Page(s):432 - 435
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  • Diesel-electric locomotive for pike's peak railway

    Publication Year: 1939, Page(s): 435
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1276 KB)

    Arack-RAIL Diesel-electric locomotive, said to be the first of its kind, has been built by the General Electric Company for the Manitou and Pike's Peak Railway, replacing the tilted steam locomotives used on the cog railway since its completion in 1891. Instead of hauling its load, the locomotive pushes a 50-passenger car from Manitou, Colo., at 6,562 feet elevation, to the top of Pike's Peak, 14,... View full abstract»

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  • News of institute and related activities: Summary of local activities reported by sections committee

    Publication Year: 1939, Page(s):436 - 437
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  • Public-utility accident rates for 1938

    Publication Year: 1939, Page(s):438 - 439
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2254 KB)

    The National Safety Council's annual statistical report on accident rates in publicutility companies during 1938 shows 11.37 injuries per million man-hours of exposure and 1.97 days lost per thousand man-hours of exposure. The first, or frequency rate, is 16 per cent lower than in 1937, and the second, or severity rate, 1 per cent lower. The average frequency rate for all industries is 12.18; the ... View full abstract»

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  • American Engineering Council: War plans to be studied by Civilian board

    Publication Year: 1939, Page(s): 439
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  • Future meetings of other societies

    Publication Year: 1939, Page(s): 439
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  • Standards

    Publication Year: 1939, Page(s):439 - 440
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  • Letters to the editor

    Publication Year: 1939, Page(s): 440
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  • A substitute for “susceptance”

    Publication Year: 1939, Page(s):440 - 441
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  • Graduate training for engineers

    Publication Year: 1939, Page(s):440 - 442
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  • Personal items

    Publication Year: 1939, Page(s):443 - 445
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Aims & Scope

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

Full Aims & Scope