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Electrical Engineering

Issue 6 • Date June 1937

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Displaying Results 1 - 25 of 39
  • [Front cover]

    Publication Year: 1937, Page(s): c1
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  • [Front inside cover]

    Publication Year: 1937, Page(s): c2
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  • [Advertisements]

    Publication Year: 1937, Page(s): 1
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  • Contents

    Publication Year: 1937, Page(s): 1
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  • High lights

    Publication Year: 1937, Page(s): 650
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  • What Institute sections are doing — A message from the President

    Publication Year: 1937, Page(s):651 - 653
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  • Development of standards material: A discussion of the responsibility of AIEE committees in aiding the development of electrical standards

    Publication Year: 1937, Page(s):653 - 654
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1412 KB)

    FOR an industry that manufactures and uses as large a variety of apparatus as the electrical industry, the problem of the development of standards is a tremendously important one. The purposes of standards are 2-fold: In the first place, they aid in the manufacture of products that are more uniform; in the second place, they form a basis that enables purchasers to orjtain bids for new apparatus on... View full abstract»

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  • Security of engineering employment

    Publication Year: 1937, Page(s):655 - 661
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    Data obtained from 35,559 engineers by the United States Bureau of Labor Statistics in its survey of the engineering profession indicate that the degree of economic security among professional engineers, as evidenced by possession of an employment contract covering some period of time, or by pension privileges, was negligible. This is the fourth in a series of articles reporting... View full abstract»

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  • The ultrahigh-frequency domain

    Publication Year: 1937, Page(s):662 - 666
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    Use of ultrahigh frequencies for educational broadcasting has been thought to offer attractive possibilities because of the supposedly almost unlimited number of channels; however, the demands of other radio services, particularly television, may be expected to congest this newly opened region. Ultrahigh-frequency waves behave somewhat like light waves, and give reliable and steady communication o... View full abstract»

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  • Practical limitations of the broadcast allocation structure

    Publication Year: 1937, Page(s):666 - 670
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    To give the radiobroadcast listener maximum service is an important problem in which the frequencies available, characteristics of the receiving set, phenomena of transmission of radio waves, area to be served, and density of population in the area must be considered. Broadcast stations in the United States are of 2 main classes, clear channel and duplicated channel, and are allocated in frequency... View full abstract»

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  • The dielectric strength of noninflammable synthetic insulating oils

    Publication Year: 1937, Page(s):671 - 676
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    THE SUBSTITUTION of chlorine for hydrogen in the hydrocarbon molecule produces marked effect not only on the physical and chemical properties, but on the electrical characteristics as well. The compounds so produced present to the electrical engineer a new type of insulating liquid which eliminates many of the problems heretofore inevitably associated with the use of mineral oil. It is the object ... View full abstract»

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  • Application of arresters and the selection of insulation levels

    Publication Year: 1937, Page(s):677 - 682
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    FOR many years, the insulation strength of power transformers and other electrical equipment was determined chiefly by the performance in service. When failures occurred, the insulation was made heavier at the points of weakness, and gradually the number of weak points was reduced in the particular lines of equipment and ratings involved. When new lines or ratings were initiated, operating experie... View full abstract»

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  • Surge protection of distribution systems

    Publication Year: 1937, Page(s):683 - 688
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    A quantitative investigation of the surge protective requirements of distribution systems and the power frequency voltage requirements of protectors for these systems, has been made which leads to the conclusions that: View full abstract»

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  • Application of spill gaps and selection of insulation levels

    Publication Year: 1937, Page(s):689 - 694
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    This paper presents, from the viewpoint of the engineer who plans and operates electric power systems, the application logic or theory and the performance results with various forms of spill gaps, for the protection of circuits and equipment from lightning, and the selection of insulation levels co-ordinated with this type of protection. View full abstract»

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  • System recovery voltage determination by analytical and A-C calculating board methods

    Publication Year: 1937, Page(s):695 - 705
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    THE PERFORMANCE of current interrupting devices on systems is dependent not only on the characteristics of the device itself but also on the characteristics of the system. The voltage rating of the system and the connections at the time of fault have considerable influence on the recovery voltage and in turn on the application of the interrupting device. For example, the last oil circuit breaker t... View full abstract»

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  • Vibration-measuring instruments: Fundamental considerations in their design

    Publication Year: 1937, Page(s):706 - 710
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    A general-purpose wide-range high-precision vibrationmeasuring instrument must embody several fundamental design requirements which determine the useful frequency range, the accuracy of measurement, the intensity of vibration to which it can be applied, and the effect of the instrument on the vibrating body. View full abstract»

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  • Basic impulse insulation levels

    Publication Year: 1937, Page(s):711 - 712
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (681 KB)

    AS A RESULT of a great deal of operating experience and from a survey of the then current practice as regards insulation of high-tension equipment, it began to be evident some 9 years ago that too little, if any, attention had been paid to co-ordination of insulation in power systems. Apparatus was being built to specifications which were primarily formulated on a 60-cycle basis, with consideratio... View full abstract»

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  • Flashover characteristics of rod gaps and insulators

    Publication Year: 1937, Page(s):712 - 714
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (873 KB)

    THIS REPORT has been written to present the agreed upon impulse and 60-cycle flashover values for rod gaps and suspension line insulators, together with a method of making correction for variation in humidity. The laboratory work and correlation upon which these data are based was done by the subcommittee on correlation of laboratory data of the joint EEINEMA committee on insula... View full abstract»

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  • Insulation co-ordination

    Publication Year: 1937, Page(s):715 - 720
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    THIS SUBJECT of insulation co-ordination has been an active one for the past 10 years or so. It was initially presented and discussed in 1928.1 Since then, the subject was taken up by practically all groups interested in the transmission problem including designers and operators of electric systems. As the study of the problem gathered headway, the need for further investigation work be... View full abstract»

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  • A new high-speed cathode-ray oscillograph

    Publication Year: 1937, Page(s):721 - 728
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5079 KB)

    A historical review of advances in the design of highspeed cathode-ray oscillographs and in particular a description of the development, performance, and application of a new type oscillograph is presented in this paper. The new instrument embodies a sealed-glass, high-vacuum, hot-cathode, cathode-ray tube for operation at 15,000 volts. View full abstract»

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  • Dynamic balancing of small gyroscope rotors

    Publication Year: 1937, Page(s):729 - 734
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    A DIRECT METHOD1 of balancing is generally possible for any type of rotor provided it can be run in a special fixture for the measurements. However, some rotors due to large size or other restrictions can be run only on their permanent mountings and balancing usually requires more or less “trial and error” testing. On the other hand, certain rotors of the first group that ... View full abstract»

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  • The vibration isolation of machinery

    Publication Year: 1937, Page(s):735 - 738
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    THE GENERAL purpose of isolating machinery is to reduce the amount of noise and vibration transmitted to the structure in which the machine is housed, or to adjoining structures. The general subject of isolation and isolation materials is receiving increasing attention with the tendency to speed up machinery. Machine designers recognize the fact that increased speed has resulted in troublesome vib... View full abstract»

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  • New oil-filled cable lines in Chicago

    Publication Year: 1937, Page(s):739 - 748
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    Several recent developments in cable, joints, reservoir layout, and installation are incorporated in the 4 66-kv single-conductor oil-filled underground lines being installed in Chicago in 1936–37. The main results are economies and simplification. The emergency ratings of the lines are 115,000 kva in summer and 135,000 kva in winter. View full abstract»

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  • Insulation strength of transformers

    Publication Year: 1937, Page(s):749 - 754
    Cited by:  Papers (1)
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    THIS PAPER is presented to review the work of the transformer subcommittee in setting up standards for the insulation strength of transformers. An effort will be made to present the steps in the development of the insulation co-ordination problem in regard to transformers and to clarify certain points on which misunderstandings have arisen. The present insulation strength standards and tests will ... View full abstract»

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  • News of Institute and related activities

    Publication Year: 1937, Page(s):755 - 757
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Aims & Scope

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

Full Aims & Scope