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

Issue 2 • Date May 1955

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Displaying Results 1 - 25 of 27
  • Data transfer and display equipment for a proposed system of air traffic control

    Publication Year: 1955, Page(s):145 - 149
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4887 KB)

    IN 1947, a group representing all phases of the aviation industry met as Special Committee 31 of the Radio Technical Commission for Aeronautics (RTCA). Their purpose was to bring order out of a chaos where many different systems of air navigation and air traffic control were being proposed and developed to satisfy the same need. This group evaluated the existing and proposed systems and formulated... View full abstract»

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  • Some properties of magnetic fluids

    Publication Year: 1955, Page(s):149 - 152
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1809 KB)

    SINCE the original announcements of J. Rabinow's investigations of magnetic fluid clutches in 1948,1 much energy has been expended to make practical use of this phenomenon. Application to computers, machine tools, dynamometers, and automotive clutches are but a few of the areas which have been studied. The results of these application studies have not been as rewarding as originally anticipated, a... View full abstract»

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  • An electronic system for air traffic control information

    Publication Year: 1955, Page(s):152 - 155
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1725 KB)

    A digital information processing system has been built for handling and storing flight plans and weather information. Messages are received and sent out by the system automatically over standard teletype lines. Requests for stored information and directions to change it are also transmitted by teletype. This system is capable of being connected in common with other similar systems by a teletype ne... View full abstract»

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  • Machine testing for deviation of data from a Poisson distribution

    Publication Year: 1955, Page(s):155 - 157
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (798 KB)

    THERE are many situations in which data are obtained describing events that occur at random. If the mechanism causing the random events is such that the events are independent and the probability of occurrence in any given interval of time is constant, the occurrence is described by the Poisson distribution. In a population of events which are normally expected to occur according to the Poisson di... View full abstract»

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  • A tapered strip transmission line for pulse transformer service

    Publication Year: 1955, Page(s):158 - 161
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2105 KB)

    THE need for wide-band impedance-transforming devices has long been recognized. The increasing interest in the use of very short pulses of millimicro-second duration in radar, communication, and other systems accentuates the demand for a device which is capable of faithfully transforming such pulses. As the bandwidth and upper cutoff frequency increase, it becomes more and more difficult to constr... View full abstract»

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  • Cold-cathode counting circuits

    Publication Year: 1955, Page(s):161 - 164
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (814 KB)

    IN RECENT years, considerable emphasis has been placed on high-speed counting devices for use in electronic computers and designed to operate at pulse rates of the order of 100 kc, and higher. These of necessity involved hot-cathode electron tubes. View full abstract»

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  • Phenomena accompanying transient low-voltage discharges in liquid dielectrics. I ¿¿ Anode phenomena at low currents

    Publication Year: 1955, Page(s):164 - 169
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1190 KB)

    ELECTRICAL spark-over between metallic electrodes in a liquid dielectric is followed by a high current-density discharge, the removal of electrode material, the formation of well-defined and characteristic electrode craters and, under some conditions, the production of colloidal suspensions of metal particles in the liquid. The associated phenomena have been the subject of many studies, originally... View full abstract»

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  • Economic design of saturating reactor magnetic pulsers

    Publication Year: 1955, Page(s):169 - 171
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (745 KB)

    SATURABLE reactors have been widely applied in the electric control art. A less well-known use is in pulse-shaping or pulse-switching circuits, examples of which are to be found in ignitron trigger circuits and in modulators for high-power oscillators in radar transmitters. In the latter instance, circuits may become quite complex and there has been a need for criteria which will result in a simpl... View full abstract»

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  • Telephone lines for rural subscriber service

    Publication Year: 1955, Page(s):171 - 176
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3449 KB)

    The cost of supplying telephone service to rural subscribers is high in large part because of the high initial cost and the maintenance of outside plant required to serve the subscribers. For the immediate future the most promising methods of reducing these costs are by new and cheaper methods of line construction and by concentrating the load on fewer pairs rather than by other types of transmiss... View full abstract»

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  • Textile automation by signal control

    Publication Year: 1955, Page(s):176 - 180
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1342 KB)

    IN THE field of electric control of automatized machines, much effort is being directed towards co-ordinating the thinking of engineers in the mechanical field of design1 and in the electrical field of signal communication.2 One of the problems dictates the evolution of a common vocabulary. Closely related to it is the matter of making available to engineers in each of the two fields the body of k... View full abstract»

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  • Rapid measurement of impedance and admittance

    Publication Year: 1955, Page(s):180 - 186
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2626 KB)

    A method is described for direct, rapid, and simultaneous measurement of the real and quadrature components of a driving-point or transfer impedance and admittance over a wide and continuous range of frequency. Basically, the method employs a mixer which derives its signal and local oscillator voltages from the voltage across and current through the unknown impedance respectively. With the unknown... View full abstract»

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  • A survey of noncontacting vibration pickups using electric fields

    Publication Year: 1955, Page(s):186 - 190
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1618 KB)

    THE growing importance of vibration requirements in the field of component testing has created an increasing need for means of measuring the magnitude of the vibrating forces and displacements to which components are subjected. In general, quantities should be measured; acceleration, velocity, and displacement. While it is always advantageous to measure directly the quantity to be known, it is qui... View full abstract»

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  • Effects of transverse compressional stress on magnetic laminations

    Publication Year: 1955, Page(s):190 - 193
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1259 KB)

    Toroidal, laminated cores of several important magnetic materials were tested for their magnetic properties at compressional stresses ranging from 0 to 500 pounds per square inch (psi). The compressional stress was applied in a direction perpendicular to the plane of the laminations and perpendicular to the direction of the magnetic field. The materials tested were 3.5 and 6.4-per-cent silicon-iro... View full abstract»

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  • A novel circuit for electronic power-factor meters and wattmeters, and a novel division device

    Publication Year: 1955, Page(s):194 - 204
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2799 KB)

    Three novel electronic measuring instruments are presented, which may be used to measure power, power factor (pf), voltage, current, or impedance. They use two tubes, operated as cathode followers, in a push-pull fashion, so that the inherent property of a wide-range linear characteristic is employed to advantage. The new principle underlying the operation of the tubes involves the commutation of ... View full abstract»

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  • Theory of magnetic cross valves

    Publication Year: 1955, Page(s):204 - 208
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1036 KB)

    A PHYSICAL and mathematical theory of the interaction of two mutually orthogonal coils in a ferromagnetic medium is developed. For purposes of analysis, an idealized configuration with cross-sectional view, as shown in Fig. 1, is studied. Two coils, x and y, are wound at right angles to each other about a cylinder of ferromagnetic material of permeability ¿. The structure is then immersed in a me... View full abstract»

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  • Computer for automatizing network analyzer operation

    Publication Year: 1955, Page(s):208 - 214
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2290 KB)

    THE recent activity and interest in the development of computer methods for speeding up the solution time for power-system transient-stability problems has prompted the reporting of some work done on the Massachusetts Institute of Technology (MIT) network analyzer. The idea of coupling a computing device to a network analyzer for solving the electromechanical differential equations of the synchron... View full abstract»

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  • A circuit for measuring the resistance of energized A-C windings

    Publication Year: 1955, Page(s):214 - 218
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2667 KB)

    A SIMPLE means of measuring the electrical resistance of a-c energized windings has long been desired inasmuch as it would permit the determination of winding temperatures while the windings are operating under actual load conditions. The circuit as outlined in this paper makes such measurement possible. View full abstract»

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  • The propasation mechanism of impulse creepage discharges over oil-immersed surfaces

    Publication Year: 1955, Page(s):218 - 226
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5339 KB)

    A fundamental study of the mechanism of propagation of impulse creepage streamers over an insulating surface is reported. The studies were made using high-speed cameras, still cameras, and special probes, to give a new picture of the creepage process. High-speed photographs show that impulse creepage in the nonuniform field is a stepped discharge process, remarkably similar to natural lightning ex... View full abstract»

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  • A method for evaluation of thermal stability of magnet wire enamel

    Publication Year: 1955, Page(s):227 - 232
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1578 KB)

    A method for evaluating the thermal stability of magnet wire enamel has been developed using the dielectric strength of the enamel film as a criterion. This test method was designed for accuracy, simplicity, and economy in time, labor, materials, and equipment. Standard National Electrical Manufacturers Association (NEMA) dielectric strength twists1 are dipped in an electrical impregnating varnish... View full abstract»

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  • Insulation aging characteristics as measured by shearing modulus

    Publication Year: 1955, Page(s):232 - 239
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3037 KB)

    A method is described for determining the effect of thermal aging on the shearing modulus of flexible sheet insulations by nondestructive tests using a torsion pendulum technique. The test sample, in tape form, is simple and easily prepared. Shearing modulus of the material is determined with the tape functioning as the stressed element in a simple torsion pendulum. Equipment for sample preparatio... View full abstract»

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  • Elimination of asymmetry zero-drift errors in magnetic servo amplifiers

    Publication Year: 1955, Page(s):239 - 245
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1777 KB)

    When applying magnetic amplifiers to position-indicating synchro-transmission systems, achievement of an extremely small zero drift is of paramount importance. It is well known that zero-drift errors caused by actual deviations from perfect symmetry of the saturable-reactor and rectifier components of magnetic-amplifier push-pull circuits may be reduced to certain specified values by using proper ... View full abstract»

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  • Field tests on a 100-megawatt rectifier installation

    Publication Year: 1955, Page(s):245 - 253
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5006 KB)

    IN THIS paper results are presented from field tests made in March 1954 on the 100-megawatt ignitron rectifier station at the Robert P. Patterson plant, Arkadelphia, Ark., of the Reynolds Metals Company. Power from the rectifier station is used in the electrolytic reduction of aluminum, and all of the power is consumed on one aluminum potline. This is the largest concentration of d-c power on a si... View full abstract»

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  • A communications system for the New York State Thruway

    Publication Year: 1955, Page(s):253 - 261
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (11121 KB)

    WITH present-day rapid transportation requirements for passengers and commodities, with increasing numbers of highway freight-carrying vehicles, and with vehicles for pleasure-driving within the economic reach of nearly everyone, the need for nonstop express superhighways has become most urgent. Many of these highways have been constructed and are in operation, and many more are in process of cons... View full abstract»

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  • Coaxial cavity filters for multiplexing of 900-megacycle radio relay systems

    Publication Year: 1955, Page(s):261 - 267
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3587 KB)

    Band-pass filters have been developed to provide for simultaneous application to a single antenna of two or more radio transmitters and/or receivers operating in the 900-megacycle (mc) range. By multiplexing transmitters or multiplexing receivers, or by diplexing a transmitter and receiver, considerable saving can be realized in equipment cost for multichannel radio systems. Filters consist of one... View full abstract»

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  • Electronic computer for color printing

    Publication Year: 1955, Page(s):268 - 272
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2461 KB)

    PROBLEMS of color deficiency have been associated with color photography and magazine printing for many years and, more recently, with color television. The development of the additive and subtractive color theories in which the reproducing primaries are related to the spectral sensitivites of the 3-color-separation photographs, has been described by Hardy and Wurzburg, Jr.1 A basic relation betwe... 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