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

Issue 1 • Date Jan. 1952

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Displaying Results 1 - 21 of 21
  • [Front cover]

    Publication Year: 1952, Page(s): c1
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    Freely Available from IEEE
  • [Title page]

    Publication Year: 1952, Page(s): 1
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    Freely Available from IEEE
  • Preface

    Publication Year: 1952, Page(s): 1
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    Freely Available from IEEE
  • Mapping techniques applied to fluid mapper patterns

    Publication Year: 1952, Page(s):1 - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2030 KB)

    MANY field problems calling for graphical mapping have been crudely solved, due to lack of graphical skill or lack of training. Other problems have sometimes been badly solved by using mathematics on simplified but inaccurate substitutes for the real conformation. Many good solutions have been obtained with the electrolytic tank. View full abstract»

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  • Compensating for the quiescent current in multistage magnetic amplifiers

    Publication Year: 1952, Page(s):7 - 12
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2088 KB)

    WHEN a single saturating reactor is used as a magnetic amplifier the output current is not zero when there is no d-c input. In the absence of any d-c saturating excitation there is a small quiescent current Io. The application of a d-c signal causes the output to increase from this smaller value, Io, to a larger value Is. Under the conditions which give rise to maximum gain, the value of Io is usu... View full abstract»

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  • Overload protection of A-C instruments

    Publication Year: 1952, Page(s):13 - 17
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    The behavior of indicating instruments subjected to overloads is described. The principles underlying design requirements of protective devices are presented and certain features of instrument design which enhance the effectiveness of protective devices are mentioned. Test results on current circuit and voltage circuit protective devices which are mounted within the case of a single-phase wattmete... View full abstract»

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  • A new principle is employed for 60-cycle A-C network analyzers

    Publication Year: 1952, Page(s):18 - 25
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2143 KB)

    Through the use of a new principle, the impedance-phase-shift, the weight of the reactor elements of a 60-cycle a-c network analyzer has been reduced to a value lower than that obtainable in designs employing medium-frequency 500-cycle zone, and approximately equal to those employing high-frequency 10,000-cycle zone. The reactors have an X-R ratio of infinity in terms of system measurements. Among... View full abstract»

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  • The effect of core materials on magnetic amplifier circuits

    Publication Year: 1952, Page(s):26 - 31
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1328 KB)

    This paper shows the hysteresis loop characteristics exhibited by four different core materials while actually employed in a magnetic amplifier circuit. These characteristics serve to point up differences which affect the operation of magnetic amplifiers. It is hoped that from this information the designer will be able to apply these characteristics to better advantage as well as to increase the f... View full abstract»

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  • Electromechanical analogies of a separately excited D-C machine

    Publication Year: 1952, Page(s):32 - 42
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    The method of electromechanical analogies is now well established, the three types being the direct analogy, the inverse analogy, and the frequency analogy. This paper reviews the first two methods and applies them to the transient analysis of the separately excited d-c machine. The equivalent circuits developed allow for motion of the stator and permit the analysis of vibration problems. Referenc... View full abstract»

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  • Characteristic shifts in oxide cathode tubes

    Publication Year: 1952, Page(s):43 - 49
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1524 KB)

    THE stability of control characteristics in electronic tubes is of continuing interest to users and manufacturers alike. This quality is one phase of a broader interest in high quality tube performance evidenced by recent conferences on tubes for instrumentation and computers and by growing demands of the airlines and the armed forces for more reliable tubes. View full abstract»

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  • A high-speed direct-writing oscillograph

    Publication Year: 1952, Page(s):50 - 56
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1896 KB)

    THE Oscilloscribe, developed in the Servomechanisms Laboratory of the Department of Electrical Engineering, Yale University, is a very high-speed direct-writing oscillograph which produces an immediate permanent record of voltages having frequency components ranging from direct current to 200 cycles per second. Development of this device was started in February 1947 when comparable devices were no... View full abstract»

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  • A high-sensitivity ratio instrument for industrial resistance thermometers

    Publication Year: 1952, Page(s):57 - 60
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1185 KB)

    To make practical the extensive use of resistance thermometers for industrial temperature measurement and control, an instrument having high sensitivity, sturdy construction, and simplicity is needed. To fill this need the ratio instrument described in this paper was developed. Conventional ratio instrument mechanisms proved to be inherently unstable at the high sensitivities required. The mechani... View full abstract»

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  • Methods and apparatus employed in the testing of single-phase A-C watthour meters

    Publication Year: 1952, Page(s):61 - 71
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4957 KB)

    DURING the past decade much attention has been directed to improving the accuracy and speed of meter testing on the part of manufacturers and users of a-c watthour meters. Numerous arrangements are in general use which might well be publicized for the benefit of those who feel the need for improved methods and equipment. View full abstract»

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  • Tubes for dielectric heating at 915 megacycles

    Publication Year: 1952, Page(s):72 - 80
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    Dielectric heating can be much faster at microwave frequencies. Because leakage radiation is large enough to interfere with communications, heating is best done at assigned frequencies. The bands at 915 and 2,450 megacycles are most useful. An industrial magnetron oscillator generates 5 kw at 915 megacycles. The tube and associated control circuits are described. Apparatus for heating dinners and ... View full abstract»

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  • Characteristic impedance of rectangular coaxial transmission lines

    Publication Year: 1952, Page(s):81 - 89
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2496 KB)

    EXACT mathematical relations between the characteristic impedance and the physical dimensions of circular concentric and eccentric coaxial lines, as well as of coaxial lines having square outer and circular inner conductors1 have been developed and experimentally verified. Messinger and Higgins2 were able to develop formulas for the determination of the inductance of coaxial busses composed of squ... View full abstract»

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  • The calculation of the magnetizing force

    Publication Year: 1952, Page(s):90 - 95
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    THE author has already published the principles of his new method1 which is here developed further. This paper presents the developed method in full for the first time. View full abstract»

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  • Wave filter characteristics by a direct method

    Publication Year: 1952, Page(s):96 - 100
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1072 KB)

    Filter attenuations for the seven most common ladder filter sections can be read from a single chart or more conveniently from the two charts given. Many properties of low-pass, high-pass, and bandpass filters are readily deduced by inspection. An illustrative example is given and the equations used in construction of the charts are discussed in an Appendix. View full abstract»

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  • Series-connected magnetic amplifier with inductive loading

    Publication Year: 1952, Page(s):101 - 110
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4327 KB)

    THE circuit to be considered in this paper is the series-connected magnetic amplifier with resistance and linear inductance in either the load circuit or the control circuit, or in both circuits simultaneously, Figure 1. This circuit with modifications has been analyzed by many authors, a few of whom are mentioned in references 1 to 9. In almost all the analyses simplifying assumptions have been m... View full abstract»

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  • Automatic regulation of metallic rectifiers by magnetic control

    Publication Year: 1952, Page(s):111 - 114
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    Regulated rectifiers have numerous applications in the Bell System and recent years have seen increased use of selenium cells as the rectifying elements in these units. In large power plants, regulation has been achieved using reference standards and electronic amplifiers in checkback circuits. In plants having less than 50 amperes d-c charging capacity, however, it has been possible to use magnet... View full abstract»

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  • A high-speed direct-scanning facsimile system

    Publication Year: 1952, Page(s):115 - 121
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    A facsimile system capable of sending 80 complete standard size letters per hour is described. Direct scanning is employed at both the transmitter and the recorder, making the transmitted message immediately available at the receiving terminal. Servoloops around the 1,800-rpm scanning motors provide the synchronous precision required at the speeds involved. Phasing is accomplished by controlling t... View full abstract»

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  • A Compact, inexpensive A-C network analyzer

    Publication Year: 1952, Page(s):122 - 128
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4328 KB)

    THE great usefulness of network analyzers (a-c calculating boards) for making power-system studies is now generally recognized. The number of a-c boards has increased from the first two, which went into service in 1929.1, 2 to more than 25 at present.3 Most of the existing a-c boards are in the United States, but there is at least one each in Canada, England, Brazil, and India. The studies made on... 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