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Transactions of the American Institute of Electrical Engineers, Part I: Communication and Electronics

Issue 5 • Date Nov. 1956

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Displaying Results 1 - 23 of 23
  • The use of computing machines in the statistical evaluation of electrical components

    Publication Year: 1956, Page(s):501 - 505
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1317 KB)

    DURING the last few years, the field of applied statistics has experienced a tremendous growth. This is evidenced by the increasing acceptance of the statistician as a vital member of the research and engineering team. The advent of the computing machine is not the least of the factors which has contributed to this growth. Not too long ago, complex statistical problems in multivariate analysis or ... View full abstract»

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  • Magnetic data recording theory: Head design

    Publication Year: 1956, Page(s):506 - 512
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1532 KB)

    AN ANALYSIS of the process of magnetic recording of digital data is presented from which qualitative design concepts are developed and their usefulness demonstrated, both in the evaluation of magnetic head structures and in their design for high-density storage. View full abstract»

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  • Manufacture of wire spring relays for communication switching systems

    Publication Year: 1956, Page(s):513 - 518
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5615 KB)

    FROM THE standpoint of design objectives, features, and operating characteristics, the Bell Telephone System's new wire spring relay for telephone switching systems has been described in a previous paper.1 View full abstract»

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  • Optimum linear-segment function generation

    Publication Year: 1956, Page(s):518 - 520
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (555 KB)

    DURING the past few years, the accuracy of linear analogue-computing components has been improved to the extent that the present limitation on solution accuracy in analogue computation and simulation is caused almost entirely by the errors in nonlinear equipment. One nonlinear device which has found extensive use is the diode-type generator for arbitrary functions. In general, this device approxim... View full abstract»

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  • Automatic protection switching for TD-2 radio system

    Publication Year: 1956, Page(s):520 - 527
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3271 KB)

    Intercity transmission of television programs and telephone conversations is now provided via a network of TD-2 microwave radio relay equipment operating on a transcontinental basis. Whenever service interruption threatens because of equipment troubles or atmospheric disturbances in the transmission path, a switching system automatically and quickly substitutes a stand-by wide-band microwave radio... View full abstract»

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  • An instrument to record voltage flicker

    Publication Year: 1956, Page(s):527 - 531
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1198 KB)

    A VARIETY of electric devices have come into use in industry which impose rapid and frequent changes of load. This may cause sudden changes in voltage at frequent intervals, a condition which is known as voltage flicker. It is the concern of the electrical utility to detect such flicker to keep it below the level at which objectionable lamp flicker results. View full abstract»

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  • Southwest oregon radio system for the Bonneville Power Administration

    Publication Year: 1956, Page(s):531 - 538
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5185 KB)

    THE southwest coast line of Oregon is rugged, primitive, and beautiful. From Gold Beach, near the Oregon-California border, the towns of Port Orford, Bandon, Coos Bay, Reedsport, and Mapleton lie on the sea at the foot of the coast range in a northward sweep of 144 miles. View full abstract»

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  • Microwave for telephone companies

    Publication Year: 1956, Page(s):538 - 542
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2168 KB)

    MICROWAVE is considered very carefully before it finds itself in the toll plant of a telephone company. To an even greater extent than other communication services, telephone companies require microwave to be capable of the utmost in performance and reliability, and yet be economical. In fulfilling these obviously contradictory requirements, microwave must meet the unusual and exacting specificati... View full abstract»

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  • Traffic considerations in community dial offices

    Publication Year: 1956, Page(s):543 - 548
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1521 KB)

    THE Rural Electrification Administration (REA) under an Act of Congress of October 1949, has the responsibility for making long-term loans for the construction of telephone systems in predominantly rural areas. Security for loans of this type is represented primarily by the ability of the system to provide good service at reasonable rates over the loan period. To insure that the systems for which ... View full abstract»

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  • Dynamax, a new crystal and domain-oriented magnetic core material

    Publication Year: 1956, Page(s):548 - 551
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1581 KB)

    Dynamax, a new high-permeability magnetic material containing approximately 65 per cent (%) nickel, 2% molybdenum, and 33% iron, has been developed in the form of thin tape for toroidal cores. It has dynamic characteristics which are superior to those of any rectangular hysteresis loop materials commercially available today. The most promising potential applications are in high-performance magneti... View full abstract»

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  • Computation of the impedances of nonuniform lines by a direct method

    Publication Year: 1956, Page(s):551 - 554
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (806 KB)

    The impedances of nonuniform or tapered lines are computed directly by solving a first-order nonlinear differential equation of the Riccati type. Special cases which include the uniform line, the exponential line, the Bessel line, and the Heaviside-Bessel line are discussed. A general reversion method for solving the nonlinear differential equation for the line impedance is discussed. View full abstract»

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  • Dynamic behavior of a 3-phase magnetic amplifier

    Publication Year: 1956, Page(s):554 - 561
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2428 KB)

    IN MANY magnetic-amplifier applications, the transient response of the magnetic amplifier is of considerable importance. This is especially true if the magnetic amplifier is to function as an element of a feedback control system. The object of the work described in this paper was to determine experimentally the dynamic performance of a 3-phase bridge magnetic-amplifier circuit. View full abstract»

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  • Superposed magnetic fields in materials with rectangular hysteresis loops

    Publication Year: 1956, Page(s):562 - 569
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1753 KB)

    THE RAPID rise in the last two decades of the magnetic amplifier art and the expansion of the fields of usefulness of high-quality magnetic components have gone hand in hand with the development of alloys and of processing techniques which lead to materials displaying highly rectangular, and at the same time extremely narrow, hysteresis loops. View full abstract»

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  • Numerical integration of differential equations on the 704 EDPM

    Publication Year: 1956, Page(s):569 - 574
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1300 KB)

    To provide a convenient means for solving complex and nonlinear ordinary differential equations, a system has been devised which causes a 704 EDPM to behave like an analogue differential analyzer. Use of this system involves the interconnection of appropriate subroutines in a manner analogous to the interconnection of operational amplifiers in an analogue machine. The subroutines are designed so t... View full abstract»

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  • A field survey of transformer oil quality

    Publication Year: 1956, Page(s):575 - 579
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1125 KB)

    REDUCTION of power transformer insulation by the recently recommended two full basic insulation levels1 has placed renewed emphasis on oil quality. The design of corona-free transformers has eliminated the use of sharpedged electrodes in highly stressed locations, favoring the more uniform dielectric field conditions. Because contamination in these uniform fields has a much greater influence on di... View full abstract»

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  • Some of the engineering aspects of the machine translation of language

    Publication Year: 1956, Page(s):580 - 585
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1478 KB)

    THE MECHANICAL translation of language by digital data-processing equipment was first suggested in private correspondence between A. D. Booth and W. Weaver in 1946.1 Since that time, others have been attracted to the field of mechanical translation and their work has resulted in the publication of a magazine, a book, and numerous papers.2,3,4 View full abstract»

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  • Magnetic amplifier control of switching transistors

    Publication Year: 1956, Page(s):585 - 589
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1541 KB)

    A series of circuits are presented which use a magnetic amplifier to control the average output power of switching transistors by pulse-width modulation. Thus the advantages of switched-transistor operation are incorporated in a linear amplifier. The magnetic elements serve both as a pulse-width modulator and as a high-gain preamplifier, thereby producing an amplifier with high-gain as well as hig... View full abstract»

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  • The triductor

    Publication Year: 1956, Page(s):590 - 594
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1145 KB)

    This paper describes the properties of the d-c premagnetized static-frequency tripler or triductor. It is shown that the triductor has many superior properties as compared with the static frequency tripler of conventional type. The automatic or manual control of the saturation of the individual iron cores by superimposed d-c magnetization makes a number of applications practical. Of particular int... View full abstract»

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  • Magnetic logic circuit control system design considerations

    Publication Year: 1956, Page(s):595 - 600
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1830 KB)

    The design of switching circuits for industrial control has been developed chiefly in terms of relays. Magnetic logic circuits, which are switching elements based on the single-core magnetic amplifier, have properties different from relays and therefore require somewhat different design methods. One possible form of switching algebra for magnetic logic circuits is suggested and simple examples of ... View full abstract»

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  • A data transmission machine

    Publication Year: 1956, Page(s):600 - 603
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1150 KB)

    MODERN business operations have developed a requirement for rapid and accurate communications involving the exchange of engineering, scientific, statistical, and accounting data. The terminal points may be in the same building or separated by hundreds of miles. The Armed Forces have the same requirements but the distances may be greater, and radio transmission must be used where wire facilities ar... View full abstract»

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  • Synchronization accuracy obtainable with multiplier phototubes

    Publication Year: 1956, Page(s):603 - 606
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (846 KB)

    The jitter in multiplier phototube synchronization systems is analyzed. The effect of bandwidth, phototube, and optical parameters on jitter is determined, and optimum operating parameters are derived. In the Appendix the intensity range of superiority of the multiplier phototubes over simple vacuum phototubes is determined. View full abstract»

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  • Impedance of thin-wire loop antennas

    Publication Year: 1956, Page(s):606 - 619
    Cited by:  Papers (46)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1868 KB)

    THE THIN-wire loop is one of the first antennas to receive theoretical consideration, having been discussed by Pocklington1 in 1897. Pocklington treated a closed loop excited by a plane wave; he obtained an exact solution for the current on the loop in the form of a Fourier series. More recently, Hallén2 considered a driven loop and obtained a solution, again in the form of a Fourier series, for ... View full abstract»

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  • Diode-shunting in magnetic amplifiers

    Publication Year: 1956, Page(s):619 - 624
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2105 KB)

    IN THE self-saturating type of magnetic amplifier it is desirable to bias the saturable reactor to a particular point on its hysteresis loop. Higher gain and better linearity of the transfer function can be achieved in this manner. Shunt paths around the diodes of the magnetic amplifier afford a convenient means of biasing the saturable reactors. View full abstract»

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Aims & Scope

This Transactions ceased publication in 1963. The current retitled publication is  IEEE Transactions on Communications.

Full Aims & Scope