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

Issue 6 • Date Jan. 1956

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Displaying Results 1 - 25 of 27
  • Report of dielectric tests on a large hydrogenerator

    Publication Year: 1956, Page(s):673 - 679
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1688 KB)

    THE OBJECT of the tests was to gather information regarding the characteristics of the insulation of a large generator winding. The tests also provided an opportunity to evaluate new test equipment and test methods. In particular, it was desired to evalute certain factors which may influence the results of various dielectric tests. View full abstract»

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  • A new line of direct-acting recording instruments

    Publication Year: 1956, Page(s):679 - 685
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3802 KB)

    A NEW line of direct-acting recording instruments has been developed to meet the increasing demand for a compact design featuring ease of maintenance, improved operating reliability and conservation of panel space. View full abstract»

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  • Magnetic amplifier sequential circuits of the asymmetrical type

    Publication Year: 1956, Page(s):685 - 691
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1703 KB)

    THE intent of this paper is to disclose as briefly as possible some new ways of interconnecting magnetic amplifier flip-flops in the hope that these can be adapted for useful purposes. These circuit arrangements may be considered as analogues of manually or mechanically actuated contact-making devices. The basic switch function is an operation in one sense for on and an action in the opposite sens... View full abstract»

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  • On the equivalent circuits of linear amplifiers

    Publication Year: 1956, Page(s):691 - 694
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (634 KB)

    The usefulness of the equivalent circuits of linear amplifiers for the circuit designer may be enhanced if the reciprocal forward- and reverse-equivalent circuits are derived. Applications to the grounded cathode vacuum-tube amplifier and to the grounded emitter transistor amplifier are shown. View full abstract»

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  • The design of the IBM type 702 system

    Publication Year: 1956, Page(s):695 - 704
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3094 KB)

    THE International Business Machine (IBM) electronic data-processing machine type 702 consists of a stored-program arithmetic and logical unit and an array of high-speed input and output devices. The system is intended primarily for the automatic processing of business records, and its design is therefore quite different from that of computers for scientific or engineering problems. Some of the mor... View full abstract»

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  • Developments in closed-circuit television

    Publication Year: 1956, Page(s):704 - 709
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2480 KB)

    THE development of closed-circuit television (TV) has been marked by many fascinating applications but, until recently, economic factors ruled out its mass usage in many fields. In industry, education, business, and the military, television has been a fascinating medium to explore, test, and evaluate, but only infrequently could its proponents justify its introduction on a permanent large-scale ba... View full abstract»

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  • An envelope delay-measuring instrument in the audio-frequency range

    Publication Year: 1956, Page(s):710 - 717
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3765 KB)

    IT HAS long been recognized that careful attention must be given to the amplitude response of all types of communication systems throughout the useful frequency range. Other effects arising from system phase characteristics became evident as circuit lengths increased. These effects, resulting from phase distortion, persisted even after perfect correction had been made for amplitude distortion. In ... View full abstract»

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  • The effect of reactor irradiation on electrical insulation

    Publication Year: 1956, Page(s):717 - 723
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3739 KB)

    A brief review of the usual causes of insulation deterioration is given. The effect of radiation on these processes is discussed. It is observed that additional factors are present when an insulation is in a radiation field which change both the quality and nature of the insulation. View full abstract»

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  • The effects of high-energy Gamma radiation on dielectric solids

    Publication Year: 1956, Page(s):723 - 729
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1613 KB)

    The kinds and magnitudes of radiations present in the various locations near nuclear reactors are discussed as well as the mechanisms of interaction of radiation with matter, namely, group fragmentation, molecular scission, and polymerization. Techniques and locations for obtaining high dose rates are presented. Results of 60-cycle short-time voltage breakdown tests on polyethylene, cellulose acet... View full abstract»

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  • Transfer functions for amplitude-modulated signals

    Publication Year: 1956, Page(s):729 - 731
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (727 KB)

    THE purpose of this paper is to derive the general theoretical requirements which must be met by linear networks which are to perform specified operations on amplitude modulated signals. In particular, an exact correspondence will be established between a realizable transfer function A (s) which performs a given operation on any modulating function fm(t) and the network which performs an identical... View full abstract»

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  • A polar relay using momentum transfer

    Publication Year: 1956, Page(s):731 - 733
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1357 KB)

    A PRINCIPAL application of magnetic polar relays is to circuits where high operating speeds are required. One common approach for obtaining highspeed, bounce-free operation of relay contacts has utilized reduction of the armature size and mass. Disadvantages in reducing armature size are the resulting reduction of relay contact forces and the need for smaller mechanical tolerances. View full abstract»

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  • Use of proportional counters in X-ray diffraction

    Publication Year: 1956, Page(s):734 - 737
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1538 KB)

    IN X-RAY diffraction, the data are obtained by measuring the intensities diffracted at any given angle by a sample. In Fig. 1 is shown a typical experimental arrangement in which the beam from the X-ray tube target is diffracted at an angle 2¿ from its original direction into the measuring device. This device can be moved from 0 to 165 degrees 2¿ by a suitable mechanism as shown in Fig. 2, illus... View full abstract»

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  • The Seattle-Victoria radio system

    Publication Year: 1956, Page(s):737 - 741
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6652 KB)

    THIS paper presents a description of a radio system now operating between Seattle, Wash., and Victoria, British Columbia. The radio system employs the Lenkurt 72A equipment, the predecessor of the Lenkurt 72B radio described in an unpublished paper by Harp and Kebby of the Lenkurt Company. This application of 72A radio makes use of 33C Lenkurt carrier with a capacity of 24 channels in comparison t... View full abstract»

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  • Development of a wire contact relay

    Publication Year: 1956, Page(s):742 - 745
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4285 KB)

    IN AN age where electronic devices are increasing in quantity and complexity, the electromechanical relay still plays an important part in various switching operations. Commercially available relays were formerly used in accounting machines but, with steady increases in machine speed and capacity, it became necessary to design an improved relay. The development of a wire contact relay for business... View full abstract»

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  • A method of making screen room interference measurements

    Publication Year: 1956, Page(s):746 - 750
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1580 KB)

    IN THE past, interference measurements have usually been made in the screen room as they would be made in ¿free space,¿ i.e., both the operator and all the measuring equipment were placed inside the room with the radiating equipment. Under these conditions the resulting measurements had to be empirically correlated with free-space measurements. Furthermore, because of the presence of the operato... View full abstract»

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  • Operation of a nuclear power plant on an integrated electric system

    Publication Year: 1956, Page(s):751 - 755
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1301 KB)

    A nuclear power plant of the pressurized water-moderated and water-cooled type is able to meet the requirements of a central station facility for load changes and for picking up load. It may be used for system load control the same as for conventional plants. The negative temperature coefficient of reactivity characteristic adjusts reactor power level to meet power changes of the steam plant, and ... View full abstract»

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  • Presentation of data on broad-band and pulse transformer cores

    Publication Year: 1956, Page(s):755 - 763
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1929 KB)

    ADEQUATE information concerning the characteristics of available core materials is an essential tool of the transformer engineer. Not only must the information be accurate and complete but it should be presented in a form convenient for use. Present standard methods of presenting such information for use in designing pulse transformers are reviewed herein, and an improved method is proposed; this ... View full abstract»

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  • Roll-welding precious metals for telephone contacts

    Publication Year: 1956, Page(s):763 - 766
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3173 KB)

    THE roll-welding process has been used for years at the Western Electric Company for fabricating tapes for precious metal contacts. A thin strand of palladium a few thousandths of an inch thick and about 0.010 inch wide is roll-welded to a nickel tape of larger section to facilitate handling of the short lengths required in the contact-welding machines. Many millions of contacts are required in th... View full abstract»

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  • A symmetrical transistor oscillator with low second-harmonic distortion

    Publication Year: 1956, Page(s):767 - 770
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1577 KB)

    THE oscillator described in this paper was designed to supply the excitation or carrier signal for a second-harmonic type of magnetic modulator. A brief discussion of the modulator will show the necessity for the unusual characteristics of the oscillator; namely, low second-harmonic distortion combined with amplitude and frequency stability. View full abstract»

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  • Combined operation of 24-channel cable carrier and 12-channel open-wire carrier systems

    Publication Year: 1956, Page(s):770 - 777
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3887 KB)

    COMBINED operation of two carrier systems working at different frequencies and on different types of facilities, through frequency-translating equipment, has been used for some time. Combined operation of K-J systems was introduced in the mid-thirties. This system makes use of the 12-channel twin-cable K carrier operating in the frequency range of 12 to 60 kc, and the 12-channel open-wire J system... View full abstract»

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  • Analysis of a triode oscillator with losses associated with the inductive branch and signal applied in grid circuit

    Publication Year: 1956, Page(s):777 - 781
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1063 KB)

    By transforming the nonlinear equations of a triode oscillator, with and without an applied signal, to linear ones with periodically varying coefficients, the complete solutions of oscillator equations to the first power of the tube parameters are obtained, the losses being associated with the inductive branch of the oscillatory circuit and the signal applied in the grid circuit. When the circuit ... View full abstract»

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  • Very-high-frequency radio link between Puerto Rico and the Virgin Islands

    Publication Year: 1956, Page(s):781 - 785
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3770 KB)

    PUERTO Rico as well as Cuba, Hispaniola, and Jamaica comprise the Greater Antilles or West Indies, Puerto Rico being the most easterly of the group. About 50 to 75 miles farther east of Puerto Rico are the Virgin Islands which are at the end of an extensive chain of islands called the Lesser Antilles. This paper is concerned with Puerto Rico and with Saint Thomas and Saint Croix of the Virgin Isla... View full abstract»

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  • What is a minimum-phase network?

    Publication Year: 1956, Page(s):785 - 788
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (970 KB)

    THE terms ¿minimum-phase¿ and ¿nonminimum-phase¿ as applied to network functions were probably first introduced and defined by Bode.1 Since their introduction these terms have become almost household words in circuit theory circles. There seems to be unanimity of opinion as to the definitions of minimum and nonminimum-phase networks, but there is less than unanimity in understanding of the pro... View full abstract»

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  • The underwater spark; A photographic light source of high intrinsic brilliance

    Publication Year: 1956, Page(s):788 - 790
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2122 KB)

    WHEN an impulse voltage of sufficient magnitude is applied to underwater electrodes, a gaseous conduction channel forms across the gap. If the rate of current rise is thousands of amperes per microsecond, the growth of the gaseous channel is greatly restrained by the inertia of the water and this results in unusually high gas pressure, current density, and temperature. The rapid vaporization of th... View full abstract»

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  • A pole-mounted A-C-operated repeater for 12-channel open-wire carrier systems

    Publication Year: 1956, Page(s):791 - 795
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3695 KB)

    POLE-mounted a-c-operated carrier repeaters have been available since 1952. These repeaters are for use on 4-channel groups and are of the ¿frequency-frogging¿ type.1 When a 12-channel open-wire carrier system using miniature components for both terminals and repeaters became available, it was felt that it might be practical and economical to adapt the repeater to a pole-mounted installation, op... 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