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American Institute of Electrical Engineers, Proceedings of the

Issue 1 • Date Jan. 1916

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  • Index to volume XXXV

    Publication Year: 1916 , Page(s): i - x
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  • Index of subjects

    Publication Year: 1916 , Page(s): i - ix
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  • Index of authors

    Publication Year: 1916 , Page(s): ix - x
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  • Meeting in New York, January 14, 1916

    Publication Year: 1916 , Page(s): 1
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  • Nominations for Institute officers for 1916–17

    Publication Year: 1916 , Page(s): 1 - 2
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  • A. I. E. E. membership

    Publication Year: 1916 , Page(s): 2
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  • The New York conference on the National Electrical Safety Code

    Publication Year: 1916 , Page(s): 2 - 5
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  • A. I. E. E. meeting in New York, December 10, 1915

    Publication Year: 1916 , Page(s): 5
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  • Directors' meeting, New York, December 10 and 11, 1916

    Publication Year: 1916 , Page(s): 5 - 6
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  • Past section and past branch meetings

    Publication Year: 1916 , Page(s): 6 - 10
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  • Personal

    Publication Year: 1916 , Page(s): 10
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  • Obituary

    Publication Year: 1916 , Page(s): 10 - 11
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  • Membership

    Publication Year: 1916 , Page(s): 11 - 15
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  • Employment department

    Publication Year: 1916 , Page(s): 16 - 17
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  • Accessions to library

    Publication Year: 1916 , Page(s): 17 - 18
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  • Officers and board of directors, 1916–1916

    Publication Year: 1916 , Page(s): 19 - 24
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  • Outline of theory of impulse currents

    Publication Year: 1916 , Page(s): 1 - 20
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    In Part I it is shown how, from the integral of the general differential equation of the electric circuit, which has been discussed in a previous paper, all the types of electric currents are derived as special cases, corresponding to particular values of the integration constants. The equations of the circuits with massed constants, that is, the usual electric circuits, are derived by substituting zero for the (electrical) length of the circuit. Besides the general transients, discussed in a previous paper, three main classes of currents are shown to exist, corresponding to different values of the time exponent b: The alternating currents, corresponding to b = imaginary, which are the useful currents of our electric circuits. The impulse currents, corresponding to real values of b, which may be called harmful currents of our electric circuits. And, as limit case, for b = 0, the continuous-current circuit with distributed constants. The last case, a continuous current in a circuit with distributed resistance and leakage, is discussed, and it is shown that such continuous-current circuit has many features which are usually considered as typical of alternating-current wave transmission. It consists of a main current and a return current; complete reflection occurs at the end of the circuit; partial reflection at a transition point; a surge resistance exists, which, connected to the circuit, passes the current without reflection. In Part II an outline of the theory of impulse currents is given. They comprise two classes, the non-periodic and the periodic impulse currents. The equations of both are given in different form, by exponential and by hyperbolic or trigonometric functions. Their characteristics are: Impulse current and voltage may be resolved into a main wave and a return wave. The return wave is displaced from the main wave in time and in position. A time displacement exists between the two current waves and their corresponding voltage waves.- This time displacement may be a lag of the current behind the voltage, or a lead, depending on the circuit constants. In the periodic impulse currents, the displacement between main wave and return wave is represented by a position angle, and the two current waves are in quadrature in position, to their respective voltage waves. A few special cases are discussed. View full abstract»

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  • Discussion on “the measurement of dielectric losses with the cathode ray tube” (Minton), Deer Park, Md., July 2, 1915. (see proceedings for June, 1915)

    Publication Year: 1916 , Page(s): 21 - 34
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    H. W. Fisher and R. W. Atkinson: I believe the company with which the writers are associated was one of the first in this country to make extensive experiments relative to dielectric losses in cables and insulating materials. View full abstract»

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  • Discussion on “economic operation of electric ovens” (Gumaer), Deer Park, Md., July 2, 1915. (see proceedings for May, 1915)

    Publication Year: 1916 , Page(s): 35 - 37
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    Dwight F. Henderson: I think this paper has opened up a subject that will in the future be given a great deal of attention and study. The manufacturers spend a great deal of time in study and investigation and money in building efficient ovens, and then little attention is given to the operation of these ovens, ranges and other devices after they have been installed in the households. Our company in Spokane has been very active lately in pushing the sale of electric ranges and kindred devices. The greatest difficulty that our commercial men have found is in convincing the prospective users of this apparatus that the cost of operation is not going to be excessive. If this apparatus is used intelligently the cost in most cases is not excessive. We find that it closely approximates the cost of gas for a small family. I do not know how that would apply to a large family. I find, too, that the cost of heating water is the one great drawback with the electric ranges, if it is not done in some systematic manner. We have arranged a scheme for putting on a flat-rate water heater which has solved the problem as far as we are concerned, very nicely. We have developed a double snap switch interlocked so that when the range is turned on the water heater is off, and when the range is not in use the water heater is on. That gives an eighteen- or twenty-hour use of the water heater and will give continuous hot water when connected to the ordinary water tank. View full abstract»

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  • Discussion on “phase angle of current transformers” (Dawes), and “calibration of current transformers by means of mutual inductances” (Fortescue), Deer Park, Md., July 2, 1915. (see proceedings for May and June, 1915)

    Publication Year: 1916 , Page(s): 38 - 48
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    George A. Campbell: This paper is of great value to us, and we shall adopt the method of measurement which Mr. Fortescue has developed with results which are, from both the theoretical and the commercial standpoint, so eminently satisfactory. The method belongs in the category of null conjugate branch methods, together with the Wheatstone bridge and the induction balance, which are well known to be the most accurate of all methods, as neither deflections nor test current magnitudes are involved. Without constructing any special apparatus, we have recently been trying the method for measurements of mutual impedance, the circuit being similar to Fig. 12 of the paper, but with the non-inductive resistance R included as in Fig. 1 of the paper, and with a telephone substituted for the synchronous contactor. At telephonic frequencies, accurate measurements are easily and quickly made. In the development of permanent apparatus for the method, it will presumably be advantageous to adopt the circuit idea of Fig. 13, as well as the toroidal type of coil which Mr. Fortescue has shown to be so well adapted for accurate commercial work. View full abstract»

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  • Discussion on “the induction watt-hour meter” (Hollister), Deer Park, Md., July 2, 1915. (see proceedings for June, 1915)

    Publication Year: 1916 , Page(s): 49 - 57
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    W. H. Pratt: The author points out that there are two sets of eddy currents or fields to be considered and then proceeds to ignore one of these. In any complete discussion of the meter, it would be quite necessary to consider both of these effects; and since the lag angles of the resultant eddy currents are not necessarily the same, it is quite possible so to proportion the effect that compensation by special lagging devices is not even necessary. This has been done, I believe, in some cases, and certainly has been done in experimental meters. View full abstract»

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  • Discussion on “the best control of public utilities” (Baum), San Francisco, Cal., January 22, 1915, and “class rates for light and power systems or territories” (Baum), Deer Park, Md., July 2, 1915. (see proceedings for January and April, 1915)

    Publication Year: 1916 , Page(s): 58 - 70
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    Discussion at San Francisco A. H. Babcock: The paper is an argument for class rates in charging for electric service, e.g., one set of class rates to apply to an entire power distribution system, regardless of local or competitive or geographical considerations; the rates in the different classes to be determined by, first, demand charges — that is, interest, maintenance, depreciation, operation and management; and, second, energy charges, which shall include only those items that are proportional to the kw-hr. output of the plant. The paper makes no attempt to determine the rates for the different classes, but merely is an argument in favor of class rates. In support of these arguments the author cites the different conditions under which passenger and freight rates are determined by a railroad company, and states that because of the great natural difference in the service rendered there is no confusion on the part of the public with reference to the justice or the equity in the differences found between those two generic classes of rates. View full abstract»

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  • Discussion on “rates and rate making” (Lincoln), New York, October 8, 1915. (see proceedings for October, 1915)

    Publication Year: 1916 , Page(s): 71 - 112
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    William McClellan: I am interested in the theory of the maximum demand meter, and I hope Mr. Lincoln will pursue it, so that we can get a good type of maximum demand meter. It is needed, but the inference that it is universally needed is not in my opinion true. It is my firm belief that rates and rate-making is about ninety-five per cent commercial and about five per cent engineering. We have got to have a certain amount of general information along engineering lines to understand what a true rate should be, but our commercial men, who familiarize themselves with fundamental facts, are the men best qualified to make rates. View full abstract»

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Aims & Scope

This Magazine ceased publication in 1919. The current retitled publication is IEEE Spectrum.

Full Aims & Scope