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A.I.E.E., Journal of the

Issue 3 • Date March 1927

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Displaying Results 1 - 25 of 61
  • Contents

    Publication Year: 1927 , Page(s): 1
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  • Current electrical articles published by other societies

    Publication Year: 1927 , Page(s): 1
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  • Electrical standardization

    Publication Year: 1927 , Page(s): 213 - 214
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    The subject of procedure and policy in the formulation of industrial electrical standards was brought to the attention of the Winter Convention in a forceful address of President Chesney, which is printed elsewhere in this issue of the JOURNAL. Briefly stated, the question at issue is whether the Institute should continue as in the past 28 years to be the final authority on electrical standards in this country, or should renounce part of its responsibilities in this connection and permit the final authority for a large part of the work of standardization to fall into the hands of various groups of manufactures and trade organizations. President Chesney stated in discussing the subject that the time has come for the A. I. E. E. either to take decidedly more responsibility and put more vigor back of its system of procedure in establishing electrical standards, or it must step aside and give some other body an opportunity to continue the work in a vigorous way. The Institute cannot stand in the same position it is today for any great length of time, he believes, without doing injury to the electrical industry. View full abstract»

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  • A new electronic rectifier

    Publication Year: 1927 , Page(s): 215 - 222
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    A new rectifier utilizing a partially oxidized disk of copper as a rectifier unit is described. The disks may be arranged into groups suitable for all fields of rectifier applications. The rectification appears to take place at the junction between the copper and the oxide without observable physical or chemical changes, and is similar in character to rectification by the hot-cathode type of rectifiers. The physical characteristics of assembled rectifiers and a method of designing the same for special purposes are outlined and some of the design problems discussed. It is pointed out that the new rectification phenomenon is of a radically different nature from those observed in structurally somewhat similar contact rectifiers. The usual theories of contact rectification, which are based on electrolysis or thermoelectricity, are not applicable to the present case. The new phenomenon is discussed in the light of more recent theories based on electron affinities of copper and copper-oxide, which are in better accord with the observations. Some applications are given for which the rectifier seems to be especially suited. View full abstract»

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  • Research work in engineering colleges

    Publication Year: 1927 , Page(s): 222
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    About fifty American engineering colleges are carrying on organized engineering research. Fifteen of these received during the year 1924–25 more than $500,000 for research through cooperative relations with industry. The total annual expenditure by engineering colleges for research is more than $1,000,000. The cooperative relations between Purdue University and the American Railway Association have resulted in extensive studies for which the association has appropriated more than $500,000 during the last two years. View full abstract»

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  • Voltage standardization: Its relation to the interconnected power companies of the Southeast

    Publication Year: 1927 , Page(s): 223 - 230
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    Voltage standardization has long been recognized as desirable, and to date no definite standards have been accepted and applied. An attempt is now being made to coordinate the recommendations of the different power companies and manufacturers with a view towards adopting definite voltage standards for all apparatus. A proposal has recently been submitted by the manufacturers which is not applicable in its entirety to conditions in the Southeast, and this paper contains a counter-proposal submitted as being more readily acceptable to the interconnected power systems of the Southeast. View full abstract»

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  • Measurement of telegraph transmission

    Publication Year: 1927 , Page(s): 231 - 240
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    Various factors contribute to impair the quality of telegraph signals. For instance, there may be interfering currents either induced in the circuit or brought in by conduction, the proportioning of the circuit elements may be imperfect or batteries and relays may be out of adjustment. The result in any case is to distort the telegraph signals so that the received signals are not a true copy of those transmitted. The paper describes methods for measuring this distortion and for analyzing the results so as to indicate the nature and extent of the impairment and its probable cause. View full abstract»

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  • Computation of the unbalance factor of a three-phase triangle when lengths of three sides are given

    Publication Year: 1927 , Page(s): 240 - 241
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    In an important paper read before the June 1918 Convention of the A. I. E. E., it was shown by Mr. C. L. Fortescue, that any dissymmetrical system of three-phase voltages or currents could be resolved, by vector methods, into a pair of symmetrical systems, one forward and the other backward. The numerical ratio of the latter to the former is called the unbalance factor of the system. Although several vector methods were developed in the paper and its discussion, for evaluating the forward and backward components when the dissymmetrical triangle is given, so far as is known to the writer, no scalar and purely numerical method of developing them has been published. As it is useful sometimes to compute the two components without recourse to vector methods or to the drawing board, a numerical method is here offered. View full abstract»

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  • Standardization of voltage ratings for power systems and equipment

    Publication Year: 1927 , Page(s): 242 - 251
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    This paper undertakes to analyze the voltage practises and requirements of alternating current power systems with the aim of arriving at voltage standards that adequately correct and extend present standards. Utilization, or receiving terminals, is taken as the point of reference and for designation of system, circuit and equipment voltages. For this analysis and development of voltage standards a comprehensive chart, showing operating voltage limits of representative systems, is given in Plate 1. A tabulation summarizing the proposed standard voltage ratings is given in Table XI. View full abstract»

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  • Effects of corona discharge on petroleum

    Publication Year: 1927 , Page(s): 251
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    Much interest has been manifested during recent years in the use of the corona discharge during the cracking of petroleum to increase the production of gasoline, and the results of studies on this subject are given in Bureau of Mines Technical Paper, 375, by J. J. Jakosky. View full abstract»

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  • A new 132,000-volt cable joint

    Publication Year: 1927 , Page(s): 252 - 257
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    This paper describes what is believed to be a new form of high-voltage joint. The main novelties in the joint are that the metallic union of the conductors is insulated by wrapping on a single sheet of wide, impregnated paper by machine. The ends of the cable insulation are cut into a series of steps, or a taper, and knives on the machine cut the wide sheet of paper exactly to fit the steps or taper as the wide paper is being applied, until a smooth cylinder is built up to the original diameter of cable insulation. At this moment, the knives are removed, and at each end of the wide piece of paper, strips of tinfoil which have previously been cemented to the paper appear, and these strips gradually taper inward so that as the wide paper is applied, a flaring cone of metal is formed in the body of the insulation itself. This metallic cone acts as an electrostatic screen to control the longitudinal and radial stresses. It is formed automatically without any attention on the part of the splicer in the field, and it insures that all the insulation under stress is solid laminate paper insulation of the highest quality and breakdown strength, especially in the regions where the diameter is enlarged from that of the cable sheath to that of the joint sleeve. Test results are given. View full abstract»

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  • Voltage standardization

    Publication Year: 1927 , Page(s): 257 - 262
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    A review of the points of view which in general influence standardization of voltages and a number of proposals of certain standards are given in this paper. The discussion pertains to classes of voltages, three-phase systems, d-c. systems, and nominal voltages. A plea is made for the use of the ratio of 1/√3 for working voltages. View full abstract»

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  • Transmission line voltage surges

    Publication Year: 1927 , Page(s): 263 - 271
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    Records of the transients actually occurring on transmission lines of widely varying characteristics have been obtained recently with the klydonograph. 1. These records substantiate many of the theories of transients on lines. 2. They indicate the incorrectness or incompleteness of some of hese theories. 3. They suggested modifications or extensions of these latter theories. This paper is a coordination of those theories which agree with test data obtained up to the present time. Since the results of the klydonograph surge investigations are presented in a companion paper, only the data required to make this paper complete in itself are included. View full abstract»

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  • Isolation for fire fighting

    Publication Year: 1927 , Page(s): 271
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    Fires are expensive and seriously affect electric service. Unfortunately, so long as oil and combustibles are used for insulation and so long as electrical energy behaves as it does there will always be fire hazards to trouble the industry. Progress in eliminating these hazards has, however, been made in the last few years. The principle of isolation has been used to good advantage in many parts of typical systems. In recent hydroelectric stations, all apparatus containing oil has been placed outside the station structure. In metropolitan substations oil-filled equipment has been placed in fireproof compartments. Care in installation, precaution in handling oil and better inspection and maintenance of the oil have reduced the danger. View full abstract»

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  • Abridgment of space charge and current in alternating corona

    Publication Year: 1927 , Page(s): 272 - 281
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    1. The physical nature of ionization in a corona discharge in air is studied; by means of the corona spectrum, the saturation current in air around the corona voltage, and the influence of the material of the wire on the saturation current. The results indicate that nitrogen only is ionized in a corona discharge in air; that the ionization of the nitrogen results in the separation of an electron from the nitrogen molecule; and that the electron quickly attaches to a molecule or group of molecules, probably water or oxygen, to form an ion. 2. The free charge in the neighborhood of the wire called the space charge, is found to be alternating in character and to have a definite boundary. The space charge formed on any half-wave returns to the wire on the next succeeding half-wave. 3. The mobility of the ions is calculated from the boundary of the space charge. A limiting value of about 10 cm./sec. per volt/cm. is indicated for the positive ions. The negative ions show no sign of a limiting value and the mobility varies from about 1.6 to 10 cm./sec. per volt/cm. as the maximum impressed voltage rises from the corona voltage to twice the corona voltage. 4. Ionization is found to occur at lower voltages on the positive half-waves than on the negative half-waves and the ionization on the positive half-waves becomes much more copious with the beginning of ionization on the negative half-waves. 5. A formula for the corona current based on theoretical considerations is developed by the aid of certain empirical assumptions. This formula gives excellent agreement with the observed currents measured in large cylinders. A calculation of the corona current for a 100-mile three-phase transmission line gives a satisfactory agreement with the values of current as measured by W. W. Lewis. View full abstract»

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  • Buoy lamps

    Publication Year: 1927 , Page(s): 281
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    During two years' service in a five-mile stretch of the New York State Barge Canal at Utica, electric buoy lamps have shown that they cost $15 a year as compared with $65 for oil lamps which need inspection and attention daily. Fewer electrics are needed because they are brighter. View full abstract»

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  • Discussion at Pacific Coast convention: The space charge that surrounds a conductor in corona at 60 cycles

    Publication Year: 1927 , Page(s): 282 - 283
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    H. E. Mendenhall: I should like to ask Mr. Carroll one question. Two years ago, Professor Sorenson discussed Doctor Ryan's paper and he had a theory that this corona loss might be caused by the positive ions not traveling as far as the negative ions. I should like to ask if they were able to determine whether or not the space charge is out further when it is negative than it is when positive? View full abstract»

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  • Electricity and coal mining

    Publication Year: 1927 , Page(s): 283 - 284
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    F. L. Stone: Mr. Harrington is to be congratulated on the excellent way in which he has presented to the electrical engineers the very serious problem of mine electrification. It is very evident from Mr. Harrington's description of the conditions that electrification of mines must go on and mining machinery must be electrically driven; otherwise mining costs would be prohibitive. View full abstract»

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  • Transmission features of transcontinental telephony

    Publication Year: 1927 , Page(s): 284
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    J. E. Heller: It might be of interest to point out some applications in the West of the developments described by Mr. Jacobs. The longest circuits in the West include those from San Francisco to Seattle, Denver and Salt Lake City. The Seattle circuits are about 950 mi. in length and are made up of carrier channels to Portland, open wire from Portland to Tacoma and cable from Tacoma to Seattle. A large portion of the toll-circuit relief during 1927 in the Pacific System will be cared for by means of about 10 telephone carrier systems. In the next few weeks an additional circuit consisting of 104 wires will be established between Salt Lake City and San Francisco. This circuit, from a service standpoint, will be practically equivalent to the 165 circuits between San Francisco and Chicago. View full abstract»

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  • Discussion at New York meeting: Remote control of multiple street lighting

    Publication Year: 1927 , Page(s): 285 - 287
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  • Illumination items: Home lighting contest in France

    Publication Year: 1927 , Page(s): 287 - 288
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    A new spirit of decorative art is today permeating France. As in other fields, it found striking expression in the design and use of lighting fixtures at the International Exposition of Decorative Arts held last year in Paris. The ornamentation and the lighting of a room are inseparable. Recognizing this, artists and decorators often use light as the determining element in their decorative schemes and have produced wonderful and beautiful results. There are many householders, however, who cannot employ talented artists for this purpose but who, nevertheless, value such pleasing and effective lighting. To put it within their reach, the Societe pour le Perfectionnement de Teclairage and the Compagnie des Lampes are promoting a contest to develop lighting fixtures of a type suited to the average French home. Prizes amounting to 50,000 francs will be awarded. View full abstract»

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  • British home lighting contest begins with a burst of enthusiasm

    Publication Year: 1927 , Page(s): 288
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    One of the most elaborate campaigns ever put into operation for the development of the electrical industry has been launched in Great Britain under the auspices of the Electrical Development Association and the Electric Lamp Manufacturers Association. This activity is intended to promote the wiring of the homes of Great Britain and to spread the gospel of better home lighting. The campaign is receiving the enthusiastic and active support of all sections of the British electrical industry. The Technical Press is giving the movement its very hearty support and it would appear that the results could not be other than highly successful. View full abstract»

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  • A recent lighting demonstration in Holland

    Publication Year: 1927 , Page(s): 288
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    “Lighting” was chosen this year as the subject of the annual exhibit of the Academy at Rotterdam, Holland. With the assistance of several organizations, including the Dutch Illuminating Engineering Society, a demonstration of lighting effects and of good and bad lighting as it applied to a number of the more usual services was arranged. The exhibit also included displays relating to lamp manufacture, historical lamps, fixtures and portable lamps. Particular emphasis was placed on the proper use of light in the home, and in this connection the “camouflage” aspect of lighting was prominently featured. View full abstract»

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  • Incandescent lamp ratings in France

    Publication Year: 1927 , Page(s): 288
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    The Syndicate of French Manufacturers of Incandescent Lamps announces that their metallic-filament vacuum incandescent lamps will hereafter be designated, as the gas-filled lamps have been for a long time, by their consumption in watts and not by their intensity in candle power. View full abstract»

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  • The A. I. E. E. Winter convention, New York, February 7–11

    Publication Year: 1927 , Page(s): 289 - 293
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    Freely Available from IEEE

Aims & Scope

The Journal of the American Institute of Electrical Engineers (AIEE) contains articles published between 1924 and 1930. Contents are devoted to the advancement of theory and practice of electrical engineering and the allied arts and sciences.

This Journal ceased publication in 1930. The current retitled publication is IEEE Spectrum.

Full Aims & Scope