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Electrical Engineering

Issue 8 • Date Aug. 1941

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Displaying Results 1 - 25 of 31
  • [Front cover]

    Publication Year: 1941, Page(s): c1
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  • [Advertisement - Front inside cover]

    Publication Year: 1941, Page(s): c2
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  • [Advertisements]

    Publication Year: 1941, Page(s):1 - 12
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  • Contents

    Publication Year: 1941, Page(s): 1
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  • Highlights

    Publication Year: 1941, Page(s): 368
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  • Comfort avery Adams — 1940 Lamme medalist

    Publication Year: 1941, Page(s):369 - 370
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1703 KB)

    “For his contributions to the theory and design of a-c machinery and his work in the field of electric welding”, the AIEE Lamme Medal for 1940 was presented at the Institute's recent summer convention in Toronto to Doctor Adams who now is consulting engineer for the Edward G. Budd Manufacturing Company of Philadelphia, Pa. Th is was the thirteenth presentation of this medal, which wa... View full abstract»

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  • Facts versus propaganda

    Publication Year: 1941, Page(s):371 - 373
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    Whether we have a world of chaos growing out of propaganda and blind thoughtlessness or a world of peace based upon fact and common sense, depends upon the individual, and the type of education to which he has been subjected, as Doctor Adams points out in his response to the presentation of the AIEE Lamme Medal at the summer convention in Toronto. DEEP down in the hearts of most of us is an ideal,... View full abstract»

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  • Lightning phenomena: I — General characteristics

    Publication Year: 1941, Page(s):374 - 384
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4679 KB)

    Although Franklin conducted his famous lightning experiments about the middle of the 18th century, little more was learned until about a generation ago when lightning outages on expanding electric-power systems made an intensive study of the phenomena imperative. Many investigators in different parts of the world have studied lightning during that period, many special instruments have been devised... View full abstract»

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  • Powerful ultraviolet light sources

    Publication Year: 1941, Page(s):384 - 388
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2333 KB)

    More and more industrial applications are being found for the recently developed high-pressure tubular mercury-vapor lamps which are now available in lengths over five feet and with wattages greater than 4,000; some of these are described by the author, who discusses the advantages of these lamps over previously known sources of ultraviolet radiation. THE ADVENT of the high-pressure vapor lamp wit... View full abstract»

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  • If the black-out comes

    Publication Year: 1941, Page(s):389 - 392
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    American cities can profit by European experience to plan air-raid precautions that will permit traffic movement without creating undue hazards View full abstract»

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  • Operating results with PCC cars

    Publication Year: 1941, Page(s):392 - 395
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5322 KB)

    The PCC trolley car, designed several years ago by a committee of street-railway-company executives, has now been in operation long enough to appraise its contribution to the industry. Its quietness, higher speed, improved operating characteristics, and greater passenger convenience and comfort as compared with older cars have attracted new passenger traffic, with the result that the general downw... View full abstract»

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  • Institute activities

    Publication Year: 1941, Page(s):396 - 412
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  • Of current interest

    Publication Year: 1941, Page(s):413 - 418
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  • Transactions section: Effect of sapphire-crystal orientation on the wear of watt-hour-meter bearings

    Publication Year: 1941, Page(s):811 - 813
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3170 KB)

    This paper describes the most recent of a series of studies on the life of watt-hour meter bearing materials. It covers an investigation of the effect of jewel crystalline axis orientation upon jewel wear. Lifetime stability of meter calibration is a function of bearing wear. A study of the wear (after several years' service) of the sapphire jewel cups of meters in relation to crystalline orientat... View full abstract»

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  • The dielectric strength of glass — An engineering viewpoint

    Publication Year: 1941, Page(s):814 - 818
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1308 KB)

    The purpose of this paper is to provide the engineer with co-ordinated information and data regarding the dielectric breakdown of glass which will permit him to apply this insulating material more effectively for high dielectric strength. In the discussion of the subject, particular attention has been paid to “edge effects” and other factors which cause wide variations in breakdown v... View full abstract»

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  • Overvoltages in polyphase induction motors during single-phase operation

    Publication Year: 1941, Page(s):819 - 822
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (958 KB)

    Introduction IN the course of the starting, reversal, or normal operation of a polyphase wound-rotor induction motor, it occasionally happens that either the stator or the rotor or both may be allowed to operate single phase. In some cases it has been noted that the voltage of the open terminal or terminals under these conditions has a steady-state peak value well above its normal maximum. While s... View full abstract»

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  • Photographic study of A-C arcs in flowing liquids

    Publication Year: 1941, Page(s):823 - 828
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    I. Introduction THE importance of fluid flow in aiding arc extinction in circuit interrupters has long been known. Two general types of explanation of the large effect found have been offered. Slepian1,2,3 who seems to have been the first to stress the importance of the motion of the gases liberated by the arc from the surrounding oil or solid insulation in oil breakers and expulsion fu... View full abstract»

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  • Theory of the brush-shifting A-C motor — I

    Publication Year: 1941, Page(s):829 - 833
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1187 KB)

    This is the first of a series of papers explaining the theory and principles of operation of the brush-shifting a-c motor. Operation of the machine, either as a motor or a generator, is explained on the basis of the superposition of currents. The theory of the primary current loci is developed for both high-speed and low-speed adjustments. A method of determining the primary current loci from no-l... View full abstract»

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  • Theory of the brush-shifting A-C motor — II

    Publication Year: 1941, Page(s):834 - 836
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    In the preceding paper1 of this series, a simple theory underlying the circle diagram of the brush-shifting a-c motor was presented. It is the purpose of this paper to advance this theory, and to show how it can be used to determine such quantities as efficiency, current, torque, and speed for different conditions of operation. The procedures outlined and explained have been checked exp... View full abstract»

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  • The determination of magnitude and phase angle of electrical quantities

    Publication Year: 1941, Page(s):837 - 839
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (826 KB)

    Although the three-voltmeter method for measuring the relative magnitude and phase angle of two voltages or currents is well known, the use of vacuum tube voltmeters, which draw negligible amounts of energy from the circuit, permits the use of the method for purposes which previously have not been considered. A further improvement of the scheme by balancing out one component of either voltage or c... View full abstract»

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  • Ampere-squared-second recorder

    Publication Year: 1941, Page(s):839 - 842
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3193 KB)

    A device is described which records the ampere-squared seconds in an electrical impulse of less than 0.5-second duration. A number of these have been used in resistance-welding applications to monitor the electrical variables and have contributed greatly to the uniformity of welds. The problem of indicating 1/60-second impulses at the rate of 100 a minute with the same device that will correctly i... View full abstract»

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  • Glass-bulb mercury-arc rectifiers for traction service

    Publication Year: 1941, Page(s):843 - 845
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5171 KB)

    The paper gives a general survey of the ability of glass bulb mercury-arc rectifiers to satisfactorily meet the stringent requirements of traction service. The subject matter is arranged on the assumption that engineers of the United States and Canada are not familiar with the use of this type of equipment for traction work, and the author has approached the subject from the point of view of an en... View full abstract»

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  • A new mercury rheostatic element for regulation and control

    Publication Year: 1941, Page(s):846 - 849
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    Introduction IN many regulating and control systems, the primary or actuating stimulus is available only at a low power level and must be amplified to obtain sufficient power output for the various control functions. This requirement, along with the increased use of automatic controls during the past few years has resulted in many industrial applications which require a simple, reliable power ampl... View full abstract»

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  • Modern motors serve city transit systems

    Publication Year: 1941, Page(s):850 - 853
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2708 KB)

    City transit motors operated today include many new mechanical and electrical features. Modern vehicles differ greatly from those of a decade ago and propulsion motors contributed substantially to the advances achieved. Meeting present-day needs has required designs for 300 and 600 volts involving extensive use of new materials, application to new types of drive, and suitability for dynamic brakin... View full abstract»

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  • Measurements of pre-breakdown currents in dielectrics with a cathode-ray tube

    Publication Year: 1941, Page(s):854 - 858
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (946 KB)

    A. Introduction IN order to obtain more information regarding the mechanism of electrical breakdown in insulating liquids, a number of experimenters1,2,3 have studied current flow as a function of applied voltage, using high-sensitivity d-c amplifiers with indicating instruments having relatively long-time constants. Such instruments will not follow rapid changes in current where the ti... View full abstract»

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Aims & Scope

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

Full Aims & Scope