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Electrical Engineering

Issue 6 • Date June 1947

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Displaying Results 1 - 25 of 49
  • [Front cover]

    Page(s): c1
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  • [Front inside cover]

    Page(s): c2
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  • Contents

    Page(s): 1
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  • [Advertisement]

    Page(s): 2A
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  • Highlights

    Page(s): 3A
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  • [Advertisement]

    Page(s): 4A - 12A
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  • The electrical engineer

    Page(s): 521 - 524
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    The life of Thomas A. Edison, whose 100th anniversary is being observed this year, truly embodies the spirit of “The electrical engineer” for his contributions have stimulated almost every phase of electrical activity. To men such as Edison and his cofounders of the AIEE, to men whose accomplishments have been deemed worthy of recognition, and to every electrical engineer who simply serves faithfully, the world owes much of its comfort, its efficiency, and its well-being. View full abstract»

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  • High voltage mobile substation

    Page(s): 524
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    View of the core and coils of one of the highest voltage mobile substations ever built, constructed by the Allis-Chalmers Manufacturing Company for the United States Department of Interior, Bonneville, Oreg. Tap changing mechanism provides low voltages from 2.4 kv to 13.8 kv from a 31-kv to 110-kv 3-phase line. Delta and Y connections are provided together with 4 plus 2 1/2 and 6 minus 2 1/2 per cent voltage taps. The forced-oil-cooled transformer together with high and low voltage switchgear will be trailer-mounted to provide a 2,500-kva emergency tie-in substation for a large West coast network. At the left is shown the low voltage side and at the right the high voltage side of the horizontally mounted unit View full abstract»

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  • Electrostatic sources of electric power

    Page(s): 525 - 534
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    Because they are inherent in the structure of matter, electrostatic phenomena were noted and recorded even in ancient times. However, neglect of their practical application to the generation and utilization of electric power has resulted from the slow development of insulating media. From this viewpoint, the author examines the voltageinsulating qualities of compressed gases and high vacuum and the prospects for obtaining compact machinery so insulated. View full abstract»

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  • New telemetering system

    Page(s): 534
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    A new 15-pound mechanically commutated telemetering system developed by the General Electric Company and designed for use with rockets speeding at 3,800 miles per hour recently was tested successfully at the United States Army Ordnance Proving Ground, White Sands, N. Mex. The system uses only ten electronic tubes and is packaged in two pressurized cans, each four inches in diameter and 12 and 15 inches long. Power is supplied by a separate 28-volt battery, located in the control compartment, which weighs 12 pounds. Every 1/35 of a second 28 items are sent by the 5-watt transmitter in the rocket and are received at the ground station where they are recorded permanently on film from one cathode ray oscilloscope. View full abstract»

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  • An approach to the 5-year curriculum

    Page(s): 535 - 537
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    How should the 5-year engineering college program be apportioned among the many subjects contending for the student's time at every level of his training? To date this question has been sidestepped even by proponents of the “5-year plan.” With the 5-year program already adopted in some institutions, as recommended by ASEE, the question moves into the forefront of the battle currently waging over engineering curriculums. One of the first to enter the field with a comprehensive philosophy on which decisive action can be based, the author nevertheless leaves several problems in abeyance, pending further study by the psychologists. View full abstract»

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  • Underground industrialization

    Page(s): 537
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    Completely underground facilities constitute one of the most effective means for protecting aircraft production against air attacks of the type employed during World War II. This conclusion has been reached by the Air Materiel Command which, acting for the United States Army Air Forces, currently is studying German underground industrialization. View full abstract»

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  • Metering with transformer-loss compensators

    Page(s): 538 - 542
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    The transformer-loss compensator is proposed as an economical answer to the problem of metering on the low-voltage side of the transformer, where supplying and billing for energy and demand must be done at distribution or transmission voltages. Use of the compensator, an accessory to the regular watt-hour meter, necessitates no changes in the meter, and its accuracy has equaled that of meters on the high-voltage side. View full abstract»

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  • Characteristics of hydraulic turbines that effect operating efficiency

    Page(s): 542 - 546
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    A review of the problems confronting the engineer who must improve the operating efficiency of his hydro plants is presented because worth-while saving to the operating company often can be suggested by the hydraulic turbine manufacturer. View full abstract»

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  • New cars for New York subways

    Page(s): 547 - 549
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    Fluorescent lighting, improved riding qualities, smoother acceleration and deceleration, and noise reduction are some of the numerous improvements incorporated in the new subway cars for New York City. The subway commuter will derive greater comfort and cleanliness from thermostatic heat control, an increased quantity of horizontal fans per car, plastic seat coverings, and wider aisles. View full abstract»

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  • A new single-side-band carrier system

    Page(s): 549 - 552
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    This new method of single-side-band generation is based on the frequency addition principle. Apparatus consists of linear modulators combined with wide-range phase-splitting circuits to produce the signals. View full abstract»

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  • Interconnected system operation, planning, and performance

    Page(s): 553 - 555
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    A practical summarization of the factors affecting interconnected operation is presented which shows that the interest of management, adequate organization, careful planning, and correct procedures are the essential elements contributing toward successful interconnection. View full abstract»

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  • A vacuum tube for acceleration measurement

    Page(s): 555 - 556
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    Though not perfected for field use, the vacuum tube acceleration pickup has several peculiar advantages which will facilitate many types of acceleration experimentation. These potentialities encourage further development of the tube. View full abstract»

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  • Sunspots and telegraphy

    Page(s): 557 - 560
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    Beyond the facts that they recur in welldefined cycles and that they affect certain of the earth's latitudes more than others, little but theoretical knowledge exists about the nature of sunspots and the sometimes concomitant magnetic storms. However, almost inadvertently, modern telegraph systems are being immunized against them by such innovations as carrier currents and radio relay systems which avoid the effects of earthcurrent disturbances. View full abstract»

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  • Newton's and einstein's relations between mass and energy

    Page(s): 561 - 564
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    A third and somewhat different approach to the subject of fundamental physical concepts and the related theories is offered to assist engineers in a better understanding of the Newton and Einstein laws and their applications in the field of physics. This is a continuation of the discussion presented in ELECTRICAL ENGINEERING, January 1947, pages 45–66. View full abstract»

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  • Simplicity in transformer protection

    Page(s): 564 - 569
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    WHENEVER a fault in a transformer is beginning to form, heat is produced locally, which begins to decompose solid or liquid insulating material and, consequently, to produce inflammable gas. This fact has led to the development of gas-actuated relays for transformer fault protection. Such relays have been in use abroad for many years, and more recently in Canada, but the applications in the United States have been negligible. Small faults develop only slight amounts of gas per time unit. Severe faults, however, quickly develop large amounts of gas and rapidly increase pressure inside the tank. The gas-actuated relays contain two elements: one is a highly sensitive gas-element which operates if gas is developed slowly and which indicates the faults in their incipient stage; the other is a quickly acting pressure element which operates the circuit breakers of the transformer when faults are grave. The experiences have been very good, and the early indications of faults in their incipient stage have reduced greatly the time for, and cost of, repairs. The sensitivity of the gas-actuated relays is considerably greater than that of any type of electrical transformer protection because of the extremely sensitive gas-element which is an important part of the protection. The gas-actuated relay is a simple and economical protective device which also can be applied to special transformers in which electrical methods are complicated, expensive, of very reduced sensitivity, and, therefore, of limited protective value. View full abstract»

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  • High frequency heating in the Radio spectrum

    Page(s): 570 - 575
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  • Adjustable frequency control of high-speed induction motors

    Page(s): 576 - 579
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    The aviation industry has found numerous applications for high-speed squirrel cage motors to operate over a wide speed range. Elaborate power supply systems have been developed to provide the required range and accuracy of motor speed control. Applications of the systems probably will be found in other industries. View full abstract»

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  • Progress in television

    Page(s): 580 - 590
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    The background of the “status quo” in standardization of this youngest offspring of communications is reviewed, and the contributions of the NTSC, the RTPB, and wartime developments evaluated. In outlining the immediate future of television, due consideration is given to commercial problems, and predictions are hazarded about the course color television will follow in view of the recent FCC decision. View full abstract»

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  • Institute activities: Final arrangements made for summer general meeting in montreal

    Page(s): 591
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Aims & Scope

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

Full Aims & Scope