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Journal of the American Institute of Electrical Engineers

Issue 10 • Oct. 1923

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Displaying Results 1 - 25 of 32
  • The axially controlled magnetron: A new type of magnetron, controlled by current through the filament

    Publication Year: 1923, Page(s):1013 - 1018
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3232 KB)

    In vacuum tubes with straight filaments of large diameter, it is found that the magnetic field of the heating current exercises a restraining effect on the escape of electrons, equivalent to the action of the grid in the pliotron, or the impressed magnetic field in the magnetron. This new valve principle may be utilized to control the output of the tube for practical purposes, such as changing hig... View full abstract»

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  • Pellet type of oxide film lightning arrester

    Publication Year: 1923, Page(s):1019 - 1020
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1971 KB)

    Practise has confirmed the theory that a valve type of lightning arrester is the best; that is, one which has a very large resistance or impedance at rated voltage, but which has a resistance of only a comparatively few ohms at say double rated voltage. The aluminum arrester was the first of this type and its success is well known. Somewhat later the oxide film (OF) arrester was developed to overc... View full abstract»

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  • A simplified method of analyzing short-circuit problems

    Publication Year: 1923, Page(s):1021 - 1028
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1615 KB)

    This paper presents the theoretical basis for a theorem by which the practical analysis and visualization of short-circuit phenomena can be greatly simplified. The theorem follows from the approximation of neglecting resistance in the application of Kirchhoff's Law to closed circuits. Thus in any problem of short circuits in which the effect of resistance is negligible in the initial moment, and t... View full abstract»

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  • Floating neutral n-phase systems

    Publication Year: 1923, Page(s):1029 - 1032
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (730 KB)

    Although this paper treats of the general case of floating neutral polyphase systems, one of its prime objects is to find the very simplest method of solving three-phase unbalanced star circuits. The method presented below is considered much simpler than the one in which the star circuit is replaced by an equivalent delta circuit; also simpler than the method of replacing one unbalanced circuit by... View full abstract»

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  • A miniature A-C. transmission system: For the practical solution of network and transmission-system problems

    Publication Year: 1923, Page(s):1033 - 1040
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2230 KB)

    The use of so-called “artificial lines” — i.e. miniature models of electric circuits — for experimental laboratory studies of transmission-line phenomena is well known. The miniature models are commonly made so as to represent, in true proportion, the electrical constants of a real line. Thus there are artificial telephone lines, artificial submarine cables, artificial ... View full abstract»

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  • A continuous-current generator for high voltage

    Publication Year: 1923, Page(s):1041 - 1045
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2225 KB)

    Of all electro-dynamic machines, the direct-current machine probably is the best understood. It was the first machine to be commercially utilized and it is an interesting matter from an engineering standpoint to follow the evolution which this type of machine has passed through. The first great improvement to be incorporated in this type of machine was the application of commutating poles. As is t... View full abstract»

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  • Two photographic methods of studying high-voltage discharges

    Publication Year: 1923, Page(s):1045 - 1050
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4248 KB)

    This paper presents some of the results of two methods of drawing out the alternating-current corona discharge along a time axis. The first method consists in photographing, with the usual camera, the discharge from a needle point revolved by the alternator which is the source of supply for the high-voltage transformer. The needle is revolved inside a porcelain tube whose outside surface is made c... View full abstract»

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  • Telephone transmission over long distances

    Publication Year: 1923, Page(s):1051 - 1062
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5533 KB)

    In this paper are pointed out some of the similarities and contrasts of power transmission and telephone transmission over long distances. The problems of telephone transmission on open-wire lines are illustrated by a discussion of the methods by which the over-all efficiency of the transcontinental telephone circuit has been greatly improved. A brief discussion is given of recent important develo... View full abstract»

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  • Magneto-mechanical loads on bus supports

    Publication Year: 1923, Page(s):1063 - 1067
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (942 KB)

    Current progress in electrical development and the increasing capacity of power systems has brought into prominence many factors of mechanical strength that were previously negligible in the design of electric stations and circuits. Heavy currents, that may develop during short circuits in stations that are connected to large generating systems, make it essential that bus and cable supports be str... View full abstract»

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  • Discussion at Midwinter convention: Qualitative analysis of transmission lines

    Publication Year: 1923, Page(s):1068 - 1075
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1986 KB)

    R. D. Evans: In discussing Mr. Goodwin's paper, we wish to comment on three points, as follows: 1. The conditions for the most efficient transmission of power; 2. Stable operating conditions for long transmission lines; 3. The desirability of the circle diagram for calculating performance of transmission lines. View full abstract»

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  • Discussion on “transient conditions in electric machinery”

    Publication Year: 1923, Page(s):1076 - 1078
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (952 KB)

    D. W. Roper: Professor Lyon talks about transients in electrical machinery and develops equations for their analysis. It would be interesting if he would apply the same type of analysis to the transients which we have in our large transmission and distribution systems as well as in the machines. View full abstract»

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  • Discussion at Spring convention: Frequency conversion by third class conductor and mechanism of the arcing ground and other cumulative surges: Voltages induced by arcing grounds

    Publication Year: 1923, Page(s):1078 - 1082
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1313 KB)

    H. R. Woodrow: In both papers, the maximum surge potentials have been given neglecting the absorption of our systems, and I believe experience would show that the actual potential rise is less than that given in either one of the two papers particularly on underground systems. This factor has been brought out in connection with some tests which have recently been conducted and which I hope someone... View full abstract»

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  • General considerations in grounding the neutral of power systems: The neutral grounding reactor: Operating performance of a Petersen earth coil: Present day practise in grounding transmission systems: Systems transmitting at generated voltage: Systems transmitting at higher than generated voltage

    Publication Year: 1923, Page(s):1082 - 1087
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1656 KB)

    R. W. Atkinson: I want to say a word with regard to the comparison between the condition of a cable system and an overhead open-wire system with regard to the grounding of the neutral. There is a large and important difference for two reasons. The most important reason is the relative cost of insulation of the cable system as compared with the overhead cable for high voltage. The insulation is a v... View full abstract»

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  • Selective relay system of the 66,000-volt ring of the duquesne light company: Ground selector for ungrounded three-phase distribution systems: The distance relay for automatically sectionalizing electrical net works

    Publication Year: 1923, Page(s):1087 - 1092
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1604 KB)

    R. N. Conwell: Mr. Sleeper's paper gives an example of one of the methods of determining whether relays are correctly set for selective operation. There is another method, that of keeping accurate records of relay operations in service, which will give equally good results but these are not obtained as promptly as by applying actual short-circuit tests. The expense, however, is much less and it is... View full abstract»

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  • Mechanical computation of root mean square values

    Publication Year: 1923, Page(s):1093 - 1095
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (638 KB)

    Varying values of electric current with time are practically the ever-present condition in applications of electricity. There are two main divisions: First, varying loads, producing such data as are given, for example, by the current record of a curve-drawing ammeter; the time is recorded in hours, minutes or seconds. Second, the condition of varying currents in the alternating-current waves thems... View full abstract»

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  • Japanese-American radio circuit

    Publication Year: 1923, Page(s):1095 - 1096
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (508 KB)

    The radio telegraph circuit between the United States and Japan is operated continuously carrying a large portion of the transpacific telegraph traffic. When the recent disastrous earthquake devastated Tokio and Yokohama the radio service was not interrupted. The first news of the disaster came to the United States over this radio circuit and for several days thereafter the most complete despatche... View full abstract»

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  • The production of Porcelain for electrical insulation — VII

    Publication Year: 1923, Page(s):1096 - 1102
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (7493 KB)

    Plant control check tests are of importance primarily to the manufacturers of a product. These tests are, however, of considerable importance to the consumer. The lower a manufacturer's losses are, the cheaper his production costs will be. As high losses are caused by defects in the product it is evident that the fewer pieces there are with noticeable defects in them, the fewer pieces there will b... View full abstract»

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  • Facts about Priest rapids: The largest possible hydroelectric development in the United States West of Niagara falls

    Publication Year: 1923, Page(s):1102 - 1104
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (720 KB)

    THE Priest Rapids of the Columbia River are located a little south of almost the exact center of the State of Washington. The four principal cities of the far northwest — Portland, Seattle, Tacoma and Spokane — having an aggregate population of about 800,000, are each “as the crow flies” about 150 miles distant from Priest Rapids. The main lines of the Chicago, Milwauke... View full abstract»

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  • Illumination items: By the lighting and illumination committee: Illumination — Production tests in the industries

    Publication Year: 1923, Page(s): 1104
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (257 KB)

    Recently conducted illumination-production tests covering a wide diversity of operations in various industrial plants demonstrated in a larger field than ever before the value of higher intensities of illumination and more uniform distribution of light. Among the tests shown in Table I, special interest is attached to the result of the investigation recently made in the United States Post Office D... View full abstract»

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  • New parabolic lens for motion picture projection: New development broadens application of incandescent lamp projection in moving picture theaters

    Publication Year: 1923, Page(s): 1105
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (666 KB)

    For many years condenser lenses have been made in either of two ways: Molded as is the prismatic lens used in motion picture projection and in railway signal lamps, or ground with plane or spherical surfaces as are the plano-convex lenses, regularly used with arc lamp projectors. For some time it has been know that accurately ground surfaces of other than plane or spherical contour (aspheric surfa... View full abstract»

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  • Remote control of multiple street lighting

    Publication Year: 1923, Page(s): 1106
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (561 KB)

    Adoption of the multiple system for street lighting circuits in many cities has prompted the design of various types of devices for remote control of these circuits. One type of switching device offering many advantages is illustrated in Fig. 1. View full abstract»

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  • Institute's publication policy amended

    Publication Year: 1923, Page(s): 1107
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    Elsewhere in this issue is printed the report of the Publication Committee which inaugurates several definite changes from the policy heretofore followed in the publication of the Journal and the Transactions. It has been apparent for several years that the constant growth of Institute activities and the increasing number of papers presented at our conventions would result in an accumulation of ma... View full abstract»

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  • Future A. I. E. E. meetings

    Publication Year: 1923, Page(s):1107 - 1108
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    Freely Available from IEEE
  • Future section meetings

    Publication Year: 1923, Page(s):1108 - 1109
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    Freely Available from IEEE
  • American Engineering Council

    Publication Year: 1923, Page(s): 1109
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (291 KB)

    O. C. Merril, General Chairman of the American Section of the World Power Conference, reported, upon his return from Europe, that the plans for the conference were being matured, as a result of the very satisfactory arrangements which he and Mr. Challies, Chairman of the Canadian Committee, had made. It has been decided to hold the conference, beginning July 1, next, and continue for 7 to 10 days,... View full abstract»

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Aims & Scope

This Magazine ceased publication in 1923. The current retitled publication is IEEE Spectrum.

Full Aims & Scope