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Proceedings of the American Institute of Electrical Engineers

Issue 4 • Date April 1914

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Displaying Results 1 - 21 of 21
  • Institute meeting in Pittsburgh April 9–10, 1914

    Publication Year: 1914, Page(s):107 - 108
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  • Report of committee of tellers on nomination ballots

    Publication Year: 1914, Page(s):108 - 109
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  • Joint National committee on electrolysis

    Publication Year: 1914, Page(s):109 - 111
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  • Second Midwinter convention, New York, February 25–27, 1914

    Publication Year: 1914, Page(s):111 - 112
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  • Directors' meeting, New York, March 13, 1914

    Publication Year: 1914, Page(s):113 - 115
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  • Membership

    Publication Year: 1914, Page(s):115 - 124
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  • Past section meetings

    Publication Year: 1914, Page(s):124 - 129
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  • Personal

    Publication Year: 1914, Page(s): 130
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  • Obituary

    Publication Year: 1914, Page(s):130 - 133
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  • Library accessions

    Publication Year: 1914, Page(s):133 - 134
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  • Officers and Board of Directors

    Publication Year: 1914, Page(s):135 - 145
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  • The development of the electric mine locomotive

    Publication Year: 1914, Page(s):517 - 528
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    The paper traces, largely by means of pictures, the course that has been followed in developing the mine locomotive to its present condition. The paper is limited to locomotives for operation in coal mines. The two main factors which have directed the development are, first, the demand for increased entry capacity, and second, the exploitation of thin seams. The early machines were high, and of ir... View full abstract»

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  • Theory of the corona

    Publication Year: 1914, Page(s):529 - 546
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    The theory of the corona developed in this paper explains the coronal discharge by the application of the known laws of the discharge of electricity through gases. The experiments of Dr. Whitehead and Mr. F. W. Peek and others have shown that the surface gradient Xs at the surface of a smooth wire necessary to start the corona increases very greatly as the radius of the wires decreases.... View full abstract»

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  • Some simple examples of transmission line surges

    Publication Year: 1914, Page(s):547 - 561
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    The paper treats of the true wave phenomena which take place on a transmission line when switches are opened and closed or when a circuit breaker operates. These phenomena are practically the same in alternating- and direct-current systems for transmission lines up to say 150 or 200 mi. (240 or 320 km.) in length, and therefore the surges which are described in the paper are the surges which take ... View full abstract»

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  • Some investigations on lightning protection for buildings

    Publication Year: 1914, Page(s):563 - 579
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    A description is given of investigations conducted for a large manufacturer of explosives to determine upon a suitable system of lightning protection for buildings containing explosives. The work is divided into the following sections: (1) An analysis by oscillograph of the secondary currents induced by actual lightning discharges in vertical earthed conductors, the results seeming to indicate tha... View full abstract»

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  • Mine duty controllers

    Publication Year: 1914, Page(s):581 - 589
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    The paper is devoted to discussion of the advisable types of control to be used for various mining equipment, particularly in bituminous coal mines. Complexity and theoretical details have been eliminated as far as practicable with the idea of impressing on the reader the need for certain definite features, without going into the theoretical details of these features. Electric controllers for equi... View full abstract»

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  • Solenoids

    Publication Year: 1914, Page(s):591 - 623
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    Maxwell's law for the attraction between the halves of a bar electromagnet is not correct for electromagnets of the plunger type with air gaps between the cores because the flux in the cores is, to a large extent, independent of the reluctance in the air gap on account of the magnetic leakage from the inner end of either core back to the other end of the same core. In this paper, only the characte... View full abstract»

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  • A milliampere current transformer

    Publication Year: 1914, Page(s):625 - 639
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    (1) It is pointed out that by the use of a current transformer having a primary to secondary current ratio of the order of 1 to 100, oscillograms can be obtained of the charging current of a single high-tension insulator or of a few feet of high-tension transmission line; that is, oscillograms of currents of the order of 0.1 to 0.5 milliampere may be obtained. (2) The drawing and specification are... View full abstract»

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  • Mine substations – I their construction and operation

    Publication Year: 1914, Page(s):641 - 653
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    The use of electricity in mines has been making rapid progress throughout the United States. Steam and compressed air are being superseded largely by central station power. Power from a central station requires a substation to supply direct current to operate locomotives, cutting machines, etc. A substation is used to transform high-voltage a-c. power to direct current at 250 or 500 volts. Substat... View full abstract»

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  • Self-contained portable electric mine lamps

    Publication Year: 1914, Page(s):655 - 667
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    The considerable number of mine explosions caused by defects of the Davy safety lamps has encouraged the development of electric lamps. Satisfactory results, however, have been obtained only since the invention of the tungsten lamp, permitting the use of smaller storage batteries. The general requirements for electric lamps are: absolute safety, uninterrupted production of light for at least one s... View full abstract»

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  • Discussion on “dynamo electric lighting for motor cars” (Waller), “advantages of clutch type generator and separate starting and lighting units for motor cars” (Churchward), and “electrical equipment of gasoline automobiles” (Conrad), New York, N. Y., November 14, 1913. (see proceedings for November, 1913)

    Publication Year: 1914, Page(s):668 - 691
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    H. Ward Leonard: I should like to put before the meeting what I think are a few of the desirable features we should strive to reach in an automatic lighting system for charging a storage battery and operating the lights upon a motor car, and I think the same conditions, so far as the automatic lighting and charging are concerned, may apply equally well to the case of train lighting. These are very... 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