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Transactions of the American Institute of Electrical Engineers

Volume 60: 1941

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Displaying Results 1 - 11 of 11
  • The varioplex-a new development in telegraphy

    Publication Year: 1941, Page(s):181 - 184
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2731 KB)

    The varioplex method of telegraphic operation provides each pair of stations connected together by it an ever- ready two-way channel for the exchange of traffic, which occupies a band width of zero when idle and of a variable width when busy, depending upon extent of simultaneous usage by other connected stations. It possesses certain advantages over, or in supplement to, other forms of manual and... View full abstract»

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  • A New Method for Introducing Relaxed Initial Conditions in Transient Problems

    Publication Year: 1941, Page(s):178 - 181
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (869 KB)

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  • The Water-Cooled Steel-Tank Rectifier Corrosion Problem

    Publication Year: 1941, Page(s):173 - 178
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4649 KB)

    The first mercury-are rectifiers utilized glass tubes and consequently the physical size and electrical capacity was limited. The efforts to increase the available output led to the development of water-cooled steel-tank vacuum chambers after many years of research and the solution of many problems. This paper is primarily concerned with the solution of the problem presented by corrosion. Corrosio... View full abstract»

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  • System Stability

    Publication Year: 1941, Page(s):168 - 173
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1509 KB)

    That the specter of a major system shutdown is prominent in the thoughts of many operators is evidenced by the 1939 symposium, covering methods of modernization of station-switching facilities, and the 1940 symposium, discussing means of restoring service to systems after a major shutdown. In this paper, system and apparatus performances are studied, during the period between the time allotted for... View full abstract»

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  • Displacement and Diffusion in Fluid-Flow Arc Extinction

    Publication Year: 1941, Page(s):162 - 167
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3390 KB)

    The displacement and diffusion theories of arc extinction in flowing fluids are defined and contrasted. The question as to the possibility according to hydrodynamical principles of the formation of the wedge required by the displacement theory is considered and decided in the negative. Photographic evidence is also found to contradict the displacement theory. How turbulence will multiply diffusive... View full abstract»

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  • An Electron Microscope for Practical Laboratory Service

    Publication Year: 1941, Page(s):157 - 162
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5490 KB)

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  • Secondary Networks to Serve Industrial Plants

    Publication Year: 1941, Page(s):154 - 156
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1720 KB)

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  • Analysis of Short-Circuit Oscillograms

    Publication Year: 1941, Page(s):151 - 153
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (651 KB)

    METHODS of analyzing the oscillograms of short circuit currents of synchronous machines, in accordance with the two reaction theory, are presented in this paper. Differences between the results found here and the more generally accepted equations, based on symmetrical components, are pointed out. View full abstract»

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  • Prime-Mover Speed Governors for Interconnected Systems

    Publication Year: 1941, Page(s):147 - 151
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1297 KB)

    System operating requirements, from the standpoint of frequency and tieline loading, are continually becoming more rigorous and receiving more widespread attention. Supplementary controls have been developed to assist in the solution of these problems¿but the speed governors of the prime movers still constitute the backbone of system control. This paper outlines the general problems encountered; ... View full abstract»

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  • Engineering Requirements for Program Transmission Circuits

    Publication Year: 1941, Page(s):142 - 147
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3222 KB)

    Present-day program networks are reviewed from the standpoints of engineering, design, and operation as developed to meet the needs of the broadcasters. The factors requiring consideration in the further development of program networks in anticipation of future needs are also discussed. The presentation of the paper is supplemented by a demonstration of the quality obtainable by transmission over ... View full abstract»

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  • The Service Factor Rating of Arc-Welding Generators and Transformers

    Publication Year: 1941, Page(s):137 - 141
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1192 KB)

    The primary purpose of rating an electrical machine is to give the user an idea of what he may expect from the unit which he purchases. It is the purpose of this paper to propose a method of rating arc-welding generators and transformers which will give a truer picture of their working ability than is afforded by the present one-hour rating. Such a method of rating will be beneficial both to the c... View full abstract»

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