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Electrical Engineering

Issue 6 • Date June 1953

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Displaying Results 1 - 25 of 52
  • [Front cover]

    Publication Year: 1953 , Page(s): c1
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  • [Advertisement - Front inside cover]

    Publication Year: 1953 , Page(s): c2
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  • Contents

    Publication Year: 1953 , Page(s): 1
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  • [Advertisements]

    Publication Year: 1953 , Page(s): 2A
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  • Highlights

    Publication Year: 1953 , Page(s): 3A
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  • [Advertisements]

    Publication Year: 1953 , Page(s): 4A - 12A
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  • Report to the membership

    Publication Year: 1953 , Page(s): 477 - 479
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  • Safety regulations and how they affect the electrical industry

    Publication Year: 1953 , Page(s): 480 - 482
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    Although the electrical industry recognizes the necessity for reasonable safety standards and regulations to minimize potential hazards to the public in the use of electric energy, care should be taken to avoid unnecessarily restrictive or loosely written regulations. Members of the Institute can help by advocating to local authorities the acceptance of nationally recognized codes and standards in local laws and ordinances which regulate installation and use of electric energy. View full abstract»

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  • Wheatstone bridge for admittance determinations

    Publication Year: 1953 , Page(s): 483
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    A-C WHEATSTONE BRIDGES, which provide high accuracy for resistance determinations, have been described in the literature in the past. Little attention has been given to bridges which combine high absolute accuracy in reactance or capitance with accuracy in resistance. This is especially true for low frequencies, and is in part due to the difficulty to determine the reactance of conducting materials at low frequencies. Another reason is the unavailability of variable-resistance boxes whose distributed inductances and capacitances are sufficiently well known to eliminate their effect on the reactance to be measured. View full abstract»

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  • Trends in detection and measurement of radioisotopes for medical purposes

    Publication Year: 1953 , Page(s): 484 - 489
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  • Aging of dry-type transformer insulating systems

    Publication Year: 1953 , Page(s): 490
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    THE METHOD CHOSEN for evaluation of insulation aging should be representative of operating conditions, applicable to a large range of materials, and readily interpretable in terms of expected life of apparatus. A dielectric strength criterion meets these requirements for dry-type insulating systems. In utilizing this criterion the initial strength of each insulation system is determined at the temperature being investigated. Duplicate samples of the insulating systems are then thermally aged at this temperature and periodic, 60-cycle, 1-minute dielectric strength tests are applied at a value of one-half of the initial hot-dielectric strength until failure occurs. Plotting the hours of thermal aging to reduce the dielectric strength to one-half of its initial value against the operating temperature for a range of temperatures gives the thermal aging characteristics for the insulating system. View full abstract»

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  • Management's responsibility for development of engineers

    Publication Year: 1953 , Page(s): 491 - 495
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    Every company's management plan must include a concrete program for the development of its employees. Any such plan for the progress of the engineering personnel, whether along the path of supervision and management or of technical achievement, should consider the development of the engineer's technical and organizational abilities, his professional society activities, and his relationship with society as a whole. View full abstract»

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  • Comparative cost of distribution systems

    Publication Year: 1953 , Page(s): 496
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    THE PURPOSE OF THIS ARTICLE is to compare the effect, on the cost of new overhead, open-wire distribution systems, of using either 4.16 kv or 13.2 kv as alternative primary-feeder voltages for supplying load in the same area. The range of load densities considered is 125 to 16,000 kva per square mile. This load-density range is representative, therefore, of heavy-rural to heavy-urban loads. View full abstract»

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  • Insulation co-ordination

    Publication Year: 1953 , Page(s): 497 - 503
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    Certain changes in United States practice are proposed, while the practices in the United States and Canada are presented for the benefit of engineers of other countries. View full abstract»

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  • Hydraulic servos with hydraulic-amplifier value

    Publication Year: 1953 , Page(s): 504
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    ELECTROHYDRAULIC SYSTEMS HAVE certain advantages over pure electromechanical systems which make them particularly suitable as an adjunct to electronic control for high-power-level actuation. Performance of a typical hydraulic servomechanism utilizing the Cornell Aeronautical Laboratories (CAL) transfer valve is illustrated in Figure 1. View full abstract»

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  • Nuclear power plant control considerations

    Publication Year: 1953 , Page(s): 505 - 509
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    The general considerations affecting nuclear power plant control-system design are reviewed. Special emphasis is placed on the features of reactor control. View full abstract»

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  • Flashing of D-C machines caused by short circuits

    Publication Year: 1953 , Page(s): 510
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    STUDIES MADE ON THE flashover characteristics of two d-c machines revealed in part the mechanism of flashover as a result of short circuits. Experimental data obtained from oscillographic records and from high-speed motion pictures substantiated the concepts of arcing currents and flashing currents as follows: 1. Arcing current is related to commutation and produces ions over the surface of the commutator. 2. Flashing current is in the opposite direction to arcing current. 3. Flashing results from the ionized film of gas that envelopes the commutator and is initiated where the brush-to-commutator voltage is high enough to sustain an arc with the ionized gases present. View full abstract»

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  • Plastic electrets and their applications

    Publication Year: 1953 , Page(s): 511 - 514
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    The electret effect in high polymer plastics is described and compared to published data on the behavior of wax electrets. The results indicate the existence of large ionic polarizations giving rise to an essentially constant external electric field. Some engineering applications of electrets are discussed and limitations presented in terms of current knowledge of electret phenomena. View full abstract»

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  • Accurate radio-frequency microvoltages

    Publication Year: 1953 , Page(s): 515
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  • Single-phase motor design to minimize voltage dip

    Publication Year: 1953 , Page(s): 516
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    A REDUCTION OF THE VOLTAGE DIPS and light flicker caused by the starting of single-phase motors can be accomplished by decreasing the power component of the starting current or by shifting the starting power factor to a more leading value. Both of these adjustments are made in a new type of capacitor-start motor which causes voltage dips only half as great as are produced by the usual capacitor-start motor. The new motor is larger and employs a new starting circuit with the capacitor in series with the main winding during the starting period. View full abstract»

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  • The XY toll ticketing system

    Publication Year: 1953 , Page(s): 517 - 522
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    In order to bolster the decreasing net profits of independent telephone companies on short-distance toll calls, automatic toll switching equipment with automatic ticketing has been developed. The ticketing system temporarily stores data on a magnetic tape from which the information is printed as a toll ticket. View full abstract»

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  • The electric system reliability required in petroleum refining

    Publication Year: 1953 , Page(s): 522 - 524
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    The reliability required for critical operations is discussed together with some of the design factors which affect this reliability. It is suggested that the automatic secondary selective system, as described here, offers the most economical and generally satisfactory service for critical process units in a petroleum refinery. View full abstract»

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  • Studies of impulse strength and testing problems

    Publication Year: 1953 , Page(s): 525
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    AN EXTENSIVE INVESTIGATION was made covering (1) study of the surge characteristics of windings, (2) determination of the impulse breakdown of insulations, and (3) development of methods for demonstrating insulation levels. View full abstract»

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  • Principles of load allocation among generating units

    Publication Year: 1953 , Page(s): 526 - 529
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    The various factors that should control the assignment of generation among power units of a power system are assembled and reviewed briefly here. Whether to use a unit and at what load can be determined satisfactorily only by co-ordinating availabilities and costs of other units, total system load, and interconnection schedules, together with electrical limitations such as spinning reserve, service continuity, voltage regulation, and transmission losses. View full abstract»

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  • Operation problems of air-turbine accessory drives

    Publication Year: 1953 , Page(s): 530 - 533
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    The air-turbine motor is a highly significant and necessary advancement in methods of accessory drive. As it is in the developmental stage, there are many problems involved in its use and they probably will increase in number. However, it provides an important means of decreasing aircraft weight and complexity. 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