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

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Displaying Results 1 - 25 of 26
• Type-on carrier telephone

Publication Year: 1954, Page(s):713 - 721
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IN THE normal process of laying out toll circuits, it is found that many of the circuits will be made up of a combination of open wire and cable facilities. The new short-haul carrier systems will be found on many of the facilities, type-O on open wire1 and type-N on cable.2 Consequently, in built-up circuits, it will frequently be necessary to interconnect O and N carrier facilities at the open w... View full abstract»

• The influence of magnetic amplifier circuitry upon the operating hysteresis loops

Publication Year: 1954, Page(s):721 - 728
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THE scope of this paper will be limited to the steady-state characteristics of those high-performance magnetic amplifier circuits which are classed as single-phase self-saturated types. No attempt will be made to indicate when considerations presented herein are applicable to the 100-per-cent external feedback type. Only resistive loads will be considered. View full abstract»

• Flux preset high-speed magnetic amplifiers

Publication Year: 1954, Page(s):728 - 735
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EARLY in 1951, R. A. Ramey prepared a paper1 on magnetic amplifiers. In this and succeeding reports1, 2 on the same subject the theory and application of a new type of half-cycle response magnetic amplifier were developed. This amplifier depended upon square hysteresis loop magnetic materials for its proper operation, and the analysis in turn postulated square-loop materials. View full abstract»

• The measurement of random monochrome video interference

Publication Year: 1954, Page(s):735 - 741
Cited by:  Papers (12)
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ONE OF the important factors in the design and maintenance of television transmission circuits is random interference, sometimes referred to as random noise. Much of this type of interference originates in the input stages of amplifiers but it may also originate in the line or in other parts of the transmission path. These noise components are greatly modified by circuit equalization which may var... View full abstract»

• Fast response with magnetic amplifiers

Publication Year: 1954, Page(s):741 - 749
Cited by:  Papers (1)
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FOR MANY years the use of magnetic amplifiers was confined to those applications where extreme reliability was required, but where speed of response was not particularly important. Under the pressure of greater reliability and weight-saving requirements in higher power installations, important advances have been made in magnetic amplifier circuitry and components to achieve higher gain-to-time-con... View full abstract»

• A magnetic amplifier for synchros

Publication Year: 1954, Page(s):749 - 757
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THE SYNCHRO magnetic amplifier was developed at the Naval Research Laboratory (NRL)Â¿ to eliminate some of the difficulties and failures of the electronic synchro amplifier. At the same time, it provides a demonstration of a system utilizing magnetic circuits of a type which was developed at the Laboratory.1, 2, 3 View full abstract»

• Type-N carrier telephone deviation regulator

Publication Year: 1954, Page(s):757 - 762
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THE type-N carrier system1 was introduced into the field 3 years ago to satisfy the increasing demand for short-haul toll telephone trunks. The system provides flat regulation for the group of 12 channels at each repeater and the receiving terminal. Individual channel regulation is provided only at the receiving terminal. The flat group regulation is adequate for longer systems, but for system len... View full abstract»

• Heat dissipation from toll transmission equipment

Publication Year: 1954, Page(s):762 - 768
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THE liberal use of vacuum tubes in toll transmission equipment, the miniaturization of this and other component apparatus, and the assembly of the components into cubic units rather than on flat panels, for the purpose of realizing the potential space saving, has presented a new problem in heat dissipation. The necessity of designing for safe heat disposal has long been recognized in radio transmi... View full abstract»

• Temperature fields in electrical coils: Numerical solutions

Publication Year: 1954, Page(s):768 - 771
Cited by:  Papers (3)
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This paper illustrates the computation of steady temperature fields in electrical coils by the numerical-relaxation method of Emmons and Southwell. The general numerical method is briefly reviewed, and several examples serve to exemplify the simplicity of the technique and to verify that numerical temperatures are in substantial agreement with both experimental data and exact analytical values. View full abstract»

• Production of unipolar air with radium isotopes

Publication Year: 1954, Page(s):771 - 776
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This article is a general survey of recent development work on sources of unipolar air using alpha-emitting radioactive materials. Specific reference is made to a new device, operating at relatively high air speeds of about 450 feet per minute, which will provide an air output containing only positive or only negative ions. The method of controlling the density of this unipolar output is also trea... View full abstract»

• Gas tube filament connections

Publication Year: 1954, Page(s):776 - 785
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THE OBJECT of this paper is to evaluate quantitatively the termination of inert gas-filled power tubes by contact pins and sockets and by flexible leads with pressure-type terminals. View full abstract»

• Railroad communications using high-power carrier technique

Publication Year: 1954, Page(s):785 - 791
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IN THE wilderness of the Quebec Labrador boundary a new Canadian industry is being established 360 miles from the nearest permanent settlement. This industry is the mining of iron ore and the location is Knob Lake, 360 miles almost due north of the small town of Seven Islands on the north shore of the Gulf of St. Lawrence. View full abstract»

• Program transmission over type-N carrier telephone

Publication Year: 1954, Page(s):791 - 795
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THE transmission of program material over a nation-wide system of wire-line networks interconnecting most of the country's broadcast and television stations has grown apace with the development of the radio and television arts. Today, program networks aggregating as much as 156,000 miles in length, including both radio broadcast circuits and television sound channels, may be employed during a sing... View full abstract»

Publication Year: 1954, Page(s):796 - 800
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THE Oil and Gas Division of the Department of the Interior requested the National Petroleum Council to appoint a committee to make a study and report on the radio and radar usage being made by the petroleum industry. This paper is based on the report prepared by the committee, under the chairmanship of F. W. Littell. View full abstract»

• Microwave as applied to railroad operation in the Gulf Coast Area

Publication Year: 1954, Page(s):800 - 804
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THE Santa Fe railroad has installed a microwave system between Galveston and Beaumont, Texas. The installation is being used to supplement existing wire-line communication and to obtain technical information regarding the operation and reliability of a microwave radio-relay system in this area. It was felt at the time the decision was made to install the system that, if microwave radio relay could... View full abstract»

• A miniature compandor for general use in wire and radio communication systems

Publication Year: 1954, Page(s):804 - 811
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A miniaturized compandor has been developed for widespread application to open-wire, cable, and radio channels. Self-contained plug-in units can be inserted in telephone circuits at all commonly expected transmission levels. Two-wire operation is achieved with a plug-in resistance hybrid. Equipment simplification is achieved through use of only two miniature vacuum tubes. A conventional approach h... View full abstract»

• The solution of sturm-liouville problems by D-C network analyzer

Publication Year: 1954, Page(s):811 - 813
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A GENERAL second-order ordinary differential equation occurring frequently in engineering analysis is ${d over dx} left [ f(x){d phi over dx} right ]+ lambda g(x) phi = 0 eqno{hbox{(1)}}$ in which Â¿ is a constant and f and g are arbitrary functions such that a finite solution exists in the interval of interest. It is the purpose of this paper to show how solutions satisfying this equation and var... View full abstract»

• Solutions of boundary-value problems on automatic computing equipment

Publication Year: 1954, Page(s):813 - 821
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THIS investigation is primarily concerned with the solution of boundary-value problems by means of automatic computing equipment. Specifically, it is concerned with the solution of ordinary differential equations in which certain conditions (boundary values) are specified at two or more values of the independent variable. Such problems are generally called boundary-value problems; however, it must... View full abstract»

• Nondestructive sensing of magnetic cores

Publication Year: 1954, Page(s):822 - 830
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A nondestructive method for sensing the information state of magnetic-memory cores is under development. This new method involves the use of a quadrature magnetic field which, when pulsed, produces an output voltage. The polarity of the output voltage contains the information: a positive output pulse represents a one, and a negative pulse a zero. Reading in this manner can be repeated indefinitely... View full abstract»

• Type-7 crossbar selector

Publication Year: 1954, Page(s):830 - 833
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THE TYPE-7 crossbar selector is a mechanism for selecting one of several trunk groups in a dial telephone switching system. Each of these trunk groups may lead to a subsequent rank of group selectors, to connectors (final selectors), to outgoing trunks, or to one of several special services. Switching in this case is based on a system of decimal numbering; consequently the selector, in response to... View full abstract»

• The diode matrix as a component in relay switching circuits

Publication Year: 1954, Page(s):833 - 838
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THE diode matrix is usually thought of as a component in electronic circuits using diodes of small physical size and having current-carrying capacity in microamperes. This paper describes an application of the diode matrix in a relay switching circuit, where the diodes are small selenium rectifiers with current-carrying capacity sufficient to operate relays. In this application an effort was made ... View full abstract»

• Development of television service standards and application to design of a television broadcast network

Publication Year: 1954, Page(s):838 - 850
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IN APRIL 1952, the Federal Communications Commission released its final report and order in television (TV) allocation proceedings which had been instituted in May 1948. In the intervening 4-year period, almost every shred of engineering information and evidence relative to the TV broadcasting service problem was examined and further explored by the industry itself and by working committees compos... View full abstract»

• Automatic testing of wired relay circuits

Publication Year: 1954, Page(s):850 - 857
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PRACTICALLY all of the telephone switching equipment in an exchange is made up of wired assemblies Â¿ assemblies of relays and other components interconnected by a multiplicity of wires. These assemblies are on frameworks generally 11 feet 6 inches high. Many of these frameworks are made up of smaller components called relay circuit units composed mainly of relays. Rotary switches, resistors, capa... View full abstract»

• The use of electric network analyzers for pipe network analysis

Publication Year: 1954, Page(s):857 - 861
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THE determination of fluid-flow and pressure drop in complicated pipe networks such as gas or water distribution systems presents many problems similar to those encountered by the electrical engineer in the study of transmission and distribution networks. As the network analyzer has proved to be a very great help to the electrical engineer in his studies, it seems reasonable that similar technique... View full abstract»

• An analysis of an analogue solution applied to the heat conduction problem in a cartridge fuse

Publication Year: 1954, Page(s):861 - 868
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The general equation of heat conduction for a wire heated by an electric current and contained in an insulating cartridge filled with powder cannot be solved by analytical methods. In this paper, two approximate solutions are obtained; the first, obtained by an analytical method, assumes that radial heat loss from the wire is negligible; the second assumes that the parameters of the wire, filler, ... View full abstract»

Aims & Scope

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

Full Aims & Scope