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Electrical Engineering

Issue 5 • Date May 1953

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

    Publication Year: 1953 , Page(s): c1
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    Freely Available from IEEE
  • [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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  • Management development

    Publication Year: 1953 , Page(s): 379 - 382
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    Effective development of management potential raises many questions and presents problems both to the individual and to the company. Not only must the individual make every effort to increase his effectiveness to his company, but the company also must have a definite program by which to guide and evaluate individual progress and development. View full abstract»

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  • Television coverage of the national political conventions

    Publication Year: 1953 , Page(s): 383 - 389
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    The first large-scale television coverage of both national political conventions occurred last year in Chicago and this presented many new problems to the telephone company of that city. Special video conductors and amplifiers were used in eight of the 19 channels to the Amphitheatre and microwave facilities for the rest. View full abstract»

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  • Negative-sequence currents for line-to-line faults

    Publication Year: 1953 , Page(s): 390
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    THE RECENT REVISION of the American Standards Association Standard for Rotating Electrical Machinery, C50, short-circuit clause specifies requirements for synchronous generators during 3-phase, line-to-ground, and line-to-line short circuits. A generator operating at rated kilovolt-amperes and power factor, with fixed excitation at 5-per-cent overvoltage, must be able to withstand a 3-phase short circuit at its terminals. For line-to-ground short circuits, the maximum instantaneous current must not exceed that obtained under a 3-phase short circuit. View full abstract»

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  • The role of the supervisor in safety work

    Publication Year: 1953 , Page(s): 391 - 393
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    No factor in accident prevention is more important than good supervision. The success of a safety activity, as well as most any other operating matter, will vary in proportion to the quality of supervision. Certain requirements are needed by the supervisor, not only to prevent accidents, but also to discharge his other obligations and responsibilities to his company, his customers, and his fellow workers. View full abstract»

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  • Investigation of power connectors for use outdoors with aluminum conductors

    Publication Year: 1953 , Page(s): 393 - 397
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    The work that has been done on power connectors for outdoor use with aluminum conductors is described and conclusions presented pertinent to the design and use of tin-plated copper alloy or aluminum power connectors. View full abstract»

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  • Electronic frequency changer

    Publication Year: 1953 , Page(s): 398
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    IN 1943, A 6,667-KW ELECTRONIC frequency changer, using mercury-arc rectifiers, was installed in the Gary Sheet and Tin Mill of the United States Steel Company, at Gary, Ind., to provide a nonsynchronous tie between the 25-cycle and 60-cycle power systems for the controlled flow of power in either direction. A non-synchronous interconnection had to be used because of the frequency variations on the 25-cycle system. In 1949 the capacity of the installation was increased to 16,000 kw by raising the capacity of the first unit to 8,000 kw and adding a second 8,000-kw unit. The installation has a 2-hour rating of 20,000 kw. View full abstract»

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  • Outstanding young electrical engineers — 1936–1951

    Publication Year: 1953 , Page(s): 399 - 404
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    Each year, Eta Kappa Nu honors outstanding young electrical engineers for meritorious service to their fellow men. This analysis of the backgrounds of the 259 candidates from 1936 to 1951 may help future aspirants to these awards in planning their own careers. View full abstract»

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  • Coulomb friction in feedback control systems

    Publication Year: 1953 , Page(s): 405
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    THE PRESENCE OF COULOMB (or “rubbing”) friction in feedback control systems often results in undesirable effects, such as an operating dead-zone, low-frequency wander, and poor dynamic performance for low-level signals. In some systems, however, coulomb friction may have a stabilizing effect. This article describes a method of predicting the effect of coulomb friction on static and dynamic performance. Methods of introducing compensation are discussed for systems in which coulomb friction has an undesirable effect. View full abstract»

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  • A new liquid-filled current transformer

    Publication Year: 1953 , Page(s): 406
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    THE IMPORTANCE OF CONTINUITY of service in modern power systems demands that current transformers for operation of meters and control devices be properly applied and designed to give high accuracy, trouble-free operation, and long life. Improved materials, new manufacturing techniques, and novel features of design are utilized in a new liquid-filled current transformer to meet these exacting requirements. View full abstract»

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  • Activities of the electrical equipment subcommittee, refining division, of the American Petroleum Institute

    Publication Year: 1953 , Page(s): 407 - 409
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    A Subcommittee on Electrical Equipment of the Committee of Refinery Equipment of the American Petroleum Institute has been formed to write the rules of Recommended Good Practice for the refining industry. The aims of this group are of interest to designers, manufacturers, and installers of refinery equipment. View full abstract»

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  • Wire and cable in the telegraph industry

    Publication Year: 1953 , Page(s): 410
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    THE TECHNICAL ADVANCES in the art of telegraphy, resulting in the fully automatic selective-switching system in a modern telegraph office, have necessitated major improvements in the wire and cable network, particularly in the mechanized communication centers, to insure efficiency of operation and dependability of the complex electronic equipment in continuous operation over a wide range of frequencies and operating conditions. In each of these centers, the proper functioning of the high-speed equipment is dependent upon the performance of some 3,000 miles of high-grade wire conductors and more than 1,000,000 intricate wire connections. View full abstract»

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  • Grain-oriented iron-silicon alloys

    Publication Year: 1953 , Page(s): 411 - 416
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    Ideas and procedures utilized in the development and production of grain-oriented iron-silicon alloys are presented together with the chemical analysis and some properties of these materials. Data showing the large magnetic advantage of using the material parallel to the direction in which the alloy is rolled and indicating why transformer core designs have been influenced greatly by the development are also included. View full abstract»

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  • System stability limitations and generator loading

    Publication Year: 1953 , Page(s): 417
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    STEADY-STATE OR TRANSIENT STABILITY problems are not significant limitations on most power systems today. However, under some circumstances it is logical to split existing systems and perhaps add reactors to prevent costly increases in interrupting capacity of circuit breakers. It has become apparent recently that transient stability problems can readily develop if this approach is carried too far. View full abstract»

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  • Type o carrier telephone

    Publication Year: 1953 , Page(s): 418 - 423
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    The Type O carrier is an economical short-haul carrier system especially suitable for use under 150 miles. It fulfills the same purpose for open-wire lines as the Type N carrier system does in cable routes. Numerous laboratory tests have indicated that good service standards have been maintained in spite of its low cost. View full abstract»

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  • Some fluorinated liquid dielectrics

    Publication Year: 1953 , Page(s): 424
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    MANY FLUORINATED LIQUIDS have been made which are of potential interest to electrical engineers. They make available, for the first time, a group of properties not found in any presently used liquid dielectric. They are stable to high temperatures, water and chemical attack, are nonflammable and nonexplosive. Low power factor and low conductivity are characteristic. Advantage also can be taken of the volatile character of these materials. This results from the relatively low range of boiling points (56 to 178 degrees centigrade) found in the compounds which have been studied for electrical uses and the more volatile nature of fluorocarbons in general. This can be put to use in obtaining high vapor densities at relatively low temperatures thereby effecting such improvements as increasing the dielectric strength in the vapor phase. A high natural convection modulus also results which can give improved heat transfer from autoconvection. Good arc-extinguishing properties and low carbon formation from arcing also are found. View full abstract»

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  • Nondestructive testing of insulation

    Publication Year: 1953 , Page(s): 425
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    THE USER OF ELECTRIC APPARATUS is constantly in need of information concerning the condition of insulation. This information, at the present time, is supplied by such tests as insulation resistance, power factor, capacitance, or by more severe tests such as “high-pot.” Unfortunately, none of these tests gives a true indication of the “health” of the dielectric, but rather indicate its present condition — a condition that may exist only temporarily and can be corrected by suitable action. It is important, of course, to have this information; however, it is of equal importance in many applications to have an indication of the useful life that can be expected from the dielectric at any time during its use. View full abstract»

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  • Controllability of high-pressure high-temperature reheat steam plants

    Publication Year: 1953 , Page(s): 426 - 428
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    AT THE technical session on Systems Engineering of the AIEE Winter General Meeting in February 1949, the general problem of operating steam power plants was thoroughly reviewed. Three phases of operation were discussed as follows: 1. The general problem of fluctuating loads on power systems.1 2. Operation of steam turbines on fluctuating loads.2 3. Design of boilers and boiler control for fluctuating loads.3 View full abstract»

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  • The electric arc in argon and helium

    Publication Year: 1953 , Page(s): 429
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    THE EXACT NATURE OF THE MECHANISM of the high-current electric arc is not yet understood clearly even though the arc has been used and studied for the past century and a half. Much of the difficulty in the interpretation of arc data has been associated with the complexity of the test conditions. An example of this is found in much of the data reported on welding arcs∗∗∗ in air. Such arcs are drawn in an atmosphere composed of a mixture of several gases (some of which are very active chemically) with electrodes which are usually of complex metallic and chemical structure. View full abstract»

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  • Off-on modulated reversing clutch servo systems

    Publication Year: 1953 , Page(s): 430 - 434
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    As cost and reliability are critical factors in aircraft development, it is suggested here that simpler, more sturdy nonlinear electromagnetic servo controls should be considered. They can approximate closely the performance of a proportional type of control by the use of velocity feedback and power gains of up to 50 times in the magnetic servo clutch allow direct operation from the signal-sensing unit. 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