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Electrical Engineering

Issue 2 • Date Feb. 1931

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Displaying Results 1 - 25 of 29
  • [Front cover]

    Publication Year: 1931 , Page(s): c1
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  • [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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  • Electrical Engineering

    Publication Year: 1931 , Page(s): 1
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  • Electric power in the lumber industry

    Publication Year: 1931 , Page(s): 92 - 97
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    From logging to the manufacture of finished products the lumber industry depends upon electric power, frequently manufacturing its own from sawmill refuse. The changing order of affairs both inside and outside of the industry now emphasizes fuel economy, places an increasing premium upon wood-waste, and makes by-product electric energy an important revenue producer. View full abstract»

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  • Mercury rectifiers for subway service

    Publication Year: 1931 , Page(s): 97 - 100
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    Simplification in station design, construction, and operation results from use of mercury arc rectifiers and metal-clad switchgear and bus units; ventilation and noise problems easier to cope with; 9,000-ampere load swings handled by single unit. View full abstract»

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  • Electrolysis survey at Louisville, Ky.

    Publication Year: 1931 , Page(s): 100 - 101
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    Cooperative committee finds that electrical drainage is only a partially effective measure in the protection of pipe systems. View full abstract»

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  • Fog-type insulators eliminate transmission line flashovers

    Publication Year: 1931 , Page(s): 101
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    ACCORDING to A. C. Nielsen Company, engineers, Chicago, and J. E. Woods and E. T. Ankele, respectively chief engineer and operating engineer for the Central Power & Light Company, San Antonio, Texas, Lapp standard fog-type insulators have been instrumental in solving a troublesome transmission line problem on the power company's 17-mi., 66-kv. transmission line between Sinton and Robstown, Texas. The line in question is subject alternately to dust and salt fogs, and for some time prior to its reinsulation there occurred an average of some ten insulator failures and consequent service interruption. Analysis of maintenance costs showed an average expenditure of of $152.50 annually to cover necessary replacements, and this together with troubles arising from interruptions to important service brought about a reinsulation which was completed about two and one-half years ago. At that time the 66-kv. pin-type units previously in service were replaced each by three No. 5805 fog-type units. It is stated that insulator failures due to arcover have been eliminated entirely. View full abstract»

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  • Railroads versus transmission lines

    Publication Year: 1931 , Page(s): 102 - 105
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    Double use of railroad right-of-way permits high-voltages transmission lines to penetrate closely built-up area; also effects economies through coordination in railroad electrification and transmission construction. View full abstract»

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  • Synchronizing with vacuum tubes

    Publication Year: 1931 , Page(s): 105 - 106
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    THE day's tense moment in the old time power plant came when big machines were synchronized — pilot lights undulating dim and bright, the pointer turning slowly and more slowly; an instant of resolve and the switches slammed in. Then either a protecting grunt from the machines, or a sigh of relief from the operator. View full abstract»

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  • Saturation phenomena in potential transformers

    Publication Year: 1931 , Page(s): 106 - 109
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    Experiences with grounded-neutral Y-connected potential transformers on ungrounded systems emphasize certain dangerous “saturation phenomena” which frequently occur. Two applications are outlined here and preventive measures recommended. View full abstract»

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  • Physical nature of neutral instability

    Publication Year: 1931 , Page(s): 110 - 113
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    Experience has established the fact that three-phase-system neutrals may become subject to strange phenomena of instability under apparently normal conditions. The authors give facts and explanations based upon extensive experimentation. View full abstract»

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  • Progress in fuel utilization

    Publication Year: 1931 , Page(s): 113 - 114
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    IN discussing progress in development and application of boilers and furnaces a recent report of the Fuels Division, The American Society of Mechanical Engineers, says in part: View full abstract»

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  • Theory of abnormal voltages

    Publication Year: 1931 , Page(s): 114 - 116
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    Abnormal line-to-neutral transformer voltages may be said to be self-excited by successive alternate saturations and limited in magnitude and frequency by multiple saturations. Outline of theory is given here. View full abstract»

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  • Graphical construction of hyperbolic functions

    Publication Year: 1931 , Page(s): 117 - 118
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    TRANSMISSION line calculations requiring the use of complex hyperbolic functions are materially simplified through the construction and use of a chart from which both the complex hyperbolic sine and cosine values may be determined in either polar or complex-number form. The device is a polar rectangular chart combined with a specially constructed scale graduated in values of {\epsilon^{a} \over 2} and {\epsilon^{-a} \over 2} . The chart should be constructed with angles in circular radians and degrees which may be divided into convenient values. In constructing such a chart for practical use it may be convenient to employ heavy lines to denote each interval of 5 deg. and to subdivide these into degrees by fine lines. Ordinary cross-section paper having ten lines per inch is suitable for the rectangular chart. View full abstract»

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  • Greater efficiency for low-head hydro

    Publication Year: 1931 , Page(s): 118 - 121
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    For heads up to 70 ft. it is predicted that the automatic adjustable-blade feature of the Kaplan propeller-type turbine is capable of producing at least ten per cent more kilowatt-hours. View full abstract»

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  • Detecting hidden fissures in rails

    Publication Year: 1931 , Page(s): 122 - 124
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    Greater track safety is being accomplished by railroads through the use of a special electrical device which reveals, marks, and classifies dangerous flaws in rails as a test car progresses along the track under test. View full abstract»

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  • The engineer's duty to himself and to the public

    Publication Year: 1931 , Page(s): 125 - 128
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    The engineer is the one person best qualified to know the vital facts underlying any great project and to interpret their true significance. Upon him, therefore, rests the responsibility of enlightening the general lay public as to the difference between engineering facts and political expediency, particularly where public monies are involved. View full abstract»

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  • Control groups simplify operation

    Publication Year: 1931 , Page(s): 128 - 132
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    Unit arrangement, grouping closely around each hydroelectric generating unit all of its associated electric switching and control equipment, accomplishes important economies as well as providing improved operating flexibility and ease of expansion. Radical departures in practise have been combined with others of more usual characteristics to achieve an attractive combination. View full abstract»

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  • Magnetic circuit units adopted by I. E. C.

    Publication Year: 1931 , Page(s): 133
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    Standardized designations already adopted will obviate confusion if generally ratified; further international standardization of electromagnetic nomenclature is urged. View full abstract»

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  • Electric welding advances in modern building construction

    Publication Year: 1931 , Page(s): 133 - 134
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    CONSIDERING the new field arc-welded fourteen-story office building of the Edison Electric Illuminating Company (Boston) and a nineteen-story all-welded structure in Dallas, Texas, a few of the data on the Boston job as given by Frank P. McKibben in the G. E. Review (Dec. 1930) may be of something more than passing interest. View full abstract»

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  • The oil-blast circuit breaker

    Publication Year: 1931 , Page(s): 134 - 137
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    A further development of the explosion-chamber principle avoids the mixing of arc and oil in the main gap, utilizing the high oil pressure together with smooth and controlled flow of oil from the chamber to sweep away the arc, replacing it with a stream of clean oil. With this design tests show that a voltage of 44 kv. per inch across the working gap actually is reached. View full abstract»

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  • News of Institute and related activities

    Publication Year: 1931 , Page(s): 138 - 151
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  • Local meetings

    Publication Year: 1931 , Page(s): 151 - 156
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  • Engineering literature

    Publication Year: 1931 , Page(s): 157 - 162
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Aims & Scope

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

Full Aims & Scope