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Journal of the American Institute of Electrical Engineers

Includes the top 50 most frequently accessed documents for this publication according to the usage statistics for the month of

  • Polyphase reaction synchronous motors

    Publication Year: 1923, Page(s):1162 - 1168
    Cited by:  Papers (43)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1247 KB)

    THE reaction synchronous motor in its present form (salient-pole rotor without field coils) is one of the oldest types of electric motors, antedating the induction motor by many years. At first it was used only in connection with instruments, such as the oscillograph etc.; later its simplicity and exactness in keeping in step made it the standard driving motor for rectifying devices such as are us... View full abstract»

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  • Induction motor core losses

    Publication Year: 1920, Page(s):906 - 920
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3080 KB)

    An analysis of the core losses in induction motors is the object of the research described in this paper. The authors subdivide the core losses into six elements and point out that only one of the six is ordinarily calculated by designing engineers, with resulting large discrepancies between expectation and fact. The belief is expressed that to calculate other elements approximately is entirely fe... View full abstract»

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  • Performance of auto transformers with tertiaries under short-circuit conditions

    Publication Year: 1923, Page(s):1243 - 1247
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1960 KB)

    The problem of operating many of the present day transformers designed and built to function in sizes and under conditions unheard of only a few years ago, is now of prime importance to many of the larger power companies. A statement of one type of the operating troubles encountered in the larger sizes is discussed in this paper and data taken as far as practicable under operating conditions is gi... View full abstract»

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  • Abnormal voltage on Y-delta transformer bank due to reversed connection

    Publication Year: 1921, Page(s):840 - 841
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (434 KB)

    THE writer recently observed some abnormal voltage conditions on a Y-delta connected transformer bank which suggested the subsequent investigations described in this paper. The transformers were rated at 50 kw., 30 cycles, 12,000/2300 volts, and were Y-connected to a 22,000-volt, 623½-cycle line. This line was fed by a bank of 50,000/13,200 volt, tansformers Y-connected on the low tension s... View full abstract»

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  • Cable geometry and the calculation of current-carrying capacity

    Publication Year: 1923, Page(s):525 - 539
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3144 KB)

    The main purpose of this article is to express the calculation of current-carrying capacity in simple formulas. The allowable current for underground cables is usually limited by the maximum permissible temperature of the insulation. The temperature rise is of course a function of the ability of the cable system to dissipate the heat generated. The chief difficulty in the calculation of current-ca... View full abstract»

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  • Commutation on direct-current machines

    Publication Year: 1921, Page(s):842 - 850
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1653 KB)

    IT is well-known, that in direct-current machines with heavy linear armature load (number of ampere conductors per cm. of armature circumference) the commutation occurs under especially heavy conditions; the reactance voltage in such machines rises to a great value and therefore each in accuracy of the compensation of reactance voltage by means of interpoles produces a great additional current in ... View full abstract»

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  • Methods of voltage control of long high-voltage lines by the use of synchronous condenser

    Publication Year: 1923, Page(s):1255 - 1256
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (500 KB)

    The following points are covered in this paper: Inherent characteristics of high-voltage lines and high-voltage transformers. Effect of low power factor load on high-voltage lines as to limiting capacity and uses of condenser for increasing line output and obtaining good voltage control. Characteristics which must be met by generators, condensers and regulating equipment in order to control proper... View full abstract»

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  • The measurement of maximum demand and the determination of load factor

    Publication Year: 1920, Page(s):875 - 887
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (8557 KB)

    SINCE Hopkinson in 1892 first suggested the idea that the distribution of a customer's load throughout the day should have some bearing upon the amount which that customer should pay to the Central Station for his power, the subject of demand and load-factor measurement in its various aspects has been many times discussed. In the determinination of watts, amperes or any similar electrical quantity... View full abstract»

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  • The measurement of power in polyphase circuits

    Publication Year: 1923, Page(s):205 - 218
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2973 KB)

    The object of this paper is to point out that the existing methods of measuring power when applied to unbalanced three-phase systems are not equitable for symmetrical polyphase machinery. On the other hand, unsymmetrical loads on polyphase systems are not sufficiently penalized for the trouble which they create in the system. It is first of all shown that a symmetrical generator cannot deliver pow... View full abstract»

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  • Skin effect and proximity effect in tubular conductors

    Publication Year: 1922, Page(s):203 - 209
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1540 KB)

    The effective a-c. resistance of tubular conductors is required to be predetermined by designers, for radio installations, for large underground cables with non-magnetic cores, and for electric furnace circuits. (See Examples I to IV). For the above purpose, sets of curves are given in this paper. The skin effect ratio for isolated tubes is shown in Fig. 1. For stranded conductors, the resistance ... View full abstract»

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  • Synchronous motors for ship propulsion

    Publication Year: 1921, Page(s):369 - 373
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2360 KB)

    SINCE the inception and development of the idea of electric ship propulsion, the question of the possibility of using synchronous motors for such service has often been raised. Such a motor could be designed for unity power factor with a resulting saving in cost, weight, and efficiency, of both motor and generator. So far as mechanical design was concerned, the answer was, of course, that the same... View full abstract»

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  • Triple harmonics in transformers

    Publication Year: 1922, Page(s):351 - 359
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1957 KB)

    Although the prolbem of higher harmonics in the electrical circuits of transformers is a generation old and the solution has been given by a number of eminent engineers, still hardly a week passes in a department specializing on the manufacture of transformers that an instance does not appear of the lack of comprehension of the relations involved. If the problem were entirely confined to the realm... View full abstract»

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  • Voltages induced by arcing grounds

    Publication Year: 1923, Page(s):781 - 792
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3549 KB)

    THE subject of arcing grounds in transmission systems is one of the greatest interest to operators of power systems of any extent. The almost universal grounding of the neutral in this country is done primarily to alleviate the destructive effects produced by arcing grounds. However, in spite of its great importance, a clear understanding of what happens in an arcing ground in not general. There i... View full abstract»

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  • Textile printing: Its power requirements and electric drive

    Publication Year: 1922, Page(s):226 - 233
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4071 KB)

    Textile printing is the process of applying colored patterns and designs to all sorts of textile fabrics. The origin of the art dates back about 2000 years and credit for its discovery is given to both China and India. The present method of printing, known as cylinder or roller printing was invented and received its initial success about 1783–85. There are five methods used in textile print... View full abstract»

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  • The physical nature of the electrical breakdown of solid dielectrics

    Publication Year: 1922, Page(s):1034 - 1044
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1904 KB)

    WHILE the physical phenomena in connection with the electrical rupture of gaseous insulators have been thoroughly investigated by J. J. Thomson, J. Stark, J. Townsend, J. B. Whitehead, F. W. Peek, Jr., and many others, the nature of the breakdown in solid and liquid insulating materials has up till now remained in complete obscurity. According to the prevailing opinion the rupture takes place at t... View full abstract»

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  • Prevention of transient voltage in windings

    Publication Year: 1922, Page(s):14 - 20
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1598 KB)

    This paper relates to windings such as are used in transformers, reactors and the like, with particular reference to the characteristics which determine internal distributions of suddenly impressed voltages or sudden voltage changes, and the resulting internal oscillations. Ordinary lightning arresters, which limit the maximum voltages reaching the winding terminals, but cause rather than prevent ... View full abstract»

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  • Transformers for interconnecting high-voltage transmission systems: For feeding synchronous condensers from a tertiary winding

    Publication Year: 1921, Page(s):483 - 489
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1387 KB)

    Owing to the advantages to be realized from the use of the star-star connection in interconnecting high-voltage transmission systems and from the fact that this connection requires the use of an auxiliary winding connected in delta to stabilize the neutral point or to decrease the inductance in the ground connection, a great majority of the transformers designed for interconnecting transmission li... View full abstract»

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  • Polyphase power representation by means of symmetrical coordinates

    Publication Year: 1920, Page(s):543 - 544
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (458 KB)

    THIS paper is a more complete presentation of the subject of power representation by means of symmetrical coordinates, which was briefly outlined in the author's paper on Symmetrical Co-ordinates presented at the 30th Annual Convention, 1918. View full abstract»

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  • Magnetic and electrical properties of iron-nickel alloys

    Publication Year: 1920, Page(s):396 - 405
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3170 KB)

    Part 1. This investigation was undertaken to determine whether any iron-nickel alloys could be found having a higher saturation value than pure iron. Alloys were prepared containing 0–100 per cent Ni. Pure Fe-Ni alloys do not forge readily, and to make them forgeable it is necessary to add alloying elements like Mn or Ti. The results show that the saturation value decreases slowly with incr... View full abstract»

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  • Short-circuit current of induction motors and generators

    Publication Year: 1921, Page(s):1 - 11
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2874 KB)

    There has been a rather prevailing opinion that a sudden short circuit of an induction generator would not cause a serious initial rise in current such as occurs in synchronous generators. This has led to the proposal of the use of such machines as a partial solution of the short-circuit problem on a-c. systems. Theoretical considerations and experimental data given in the paper show that, on the ... View full abstract»

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  • A method for separating no-load losses in electrical machinery

    Publication Year: 1920, Page(s):162 - 164
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (591 KB)

    The method proposed makes use of idle operation of the machine as a motor, the voltage being varied, and speed kept constant. After deducting the armature I2 R losses from the watts input, the remaining watts are plotted against the voltage. A formula is derived based upon the assumption that the watts are equal to constant windage and friction loss plus core loss which latter varies as... View full abstract»

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  • Transformers for high-voltage systems

    Publication Year: 1923, Page(s):1259 - 1260
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (499 KB)

    The designs of transformers for 220-kv. systems do not represent radical departures from designs which have become standard for lower voltages. The solidly grounded neutral system is used and advantage is taken of this to use graded insulation and reduced voltage test. Auto-transformers are used to connect between the 220-kv. system and existing high voltages and are connected star-star with delta... View full abstract»

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  • The superpower system — II

    Publication Year: 1922, Page(s):292 - 297
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1479 KB)

    On account of diminishing fuel supply the development of our hydroelectric resources is imperative. It is probably the most fruitful field for conservation of natural resources open to the present generation. Under modern conditions there is an increasing demand for a continuous supply of energy in all channels of industry. Development of our hydroelectric resources probably requires more careful ... View full abstract»

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  • Heat losses in the conductors1 of alternating-current machines

    Publication Year: 1921, Page(s):398 - 410
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2051 KB)

    WITH the increase in the capacity of alternating-current generators, it has become more and more important to determine the exact relation between the heat developed in any conductor and the currents that it and other neighboring conductors carry. Solutions for the distribution of alternating current within conductors that are embedded in open rectangular slots have been obtained for a number of c... View full abstract»

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  • A graphic method for the exact solution of transmission lines

    Publication Year: 1922, Page(s):807 - 810
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (784 KB)

    There seems to be a popular superstition among engineers that the voltage and current relations at different points in a transmission line are peculiar and are not governed by Ohms law. This idea is not true. A transmission line is governed by Ohms law just as is any other alternating-current circuit containing resistance inductance and capacity. The only difference from an ordinary circuit is tha... View full abstract»

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  • Magnetic flux distribution in transformers

    Publication Year: 1922, Page(s):281 - 287
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2599 KB)

    It is customary when discussing magnetic leakage in the transformer to consider the primary and secondary windings as having a counter e. m. f. induced by a flux surrounding the coil and having the core for a part of its path. This leakage flux is frequently represented by closed lines. Since the main flux is also represented by closed lines in the core, apparently two fluxes are to be found in th... View full abstract»

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  • Corona in air spaces in a dielectric

    Publication Year: 1922, Page(s):702 - 709
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1671 KB)

    The consideration of the extreme care necessary in preparing samples of a dielectric for test for electrical properties led to the investigation of the effect of air spaces, purposely formed of definite thickness and location, upon the power factor. This work in a way is an extension of some work done by Clark and Shanklin and Shanklin and Matson several years ago on air spaces in high voltage cab... View full abstract»

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  • The Petersen earth coil

    Publication Year: 1922, Page(s):140 - 148
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6336 KB)

    Accidental arcing grounds on transmission lines constitute the foremost problem to be solved in the transmission of electrical energy over great distances. There has come into use to a limited extent, arcing ground suppressors. This device consists in principle, of a switch in the station which is automatically closed in parallel with the accidental arc at any point out on the system. The parallel... View full abstract»

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  • Waterwheel generators and synchronous condensers for long transmission lines

    Publication Year: 1923, Page(s):894 - 903
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (8889 KB)

    It is the intention of this paper to bring out some of the special conditions which affect the operation and design of machinery for long transmission lines and the discussion is confined largely to waterwheel generators and synchronous condensers. Under the subject of generators, the following points are discussed: Leading current drawn by transmission lines and its effect upon the stability and ... View full abstract»

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  • The expression of dielectric losses in cables

    Publication Year: 1920, Page(s):55 - 56
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (394 KB)

    DIELECTRIC losses in cables depend upon the characteristics of the current, the dimensions of the cable and the specific qualities of the insulation. In order to compare the specific qualities of different insulations with respect to dielectric losses, it is desirable to find a method of expressing these specific qualities independently of current characteristics and cable dimensions. This will pe... View full abstract»

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  • Circle diagram of polyphase induction motors

    Publication Year: 1921, Page(s):326 - 332
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1081 KB)

    In submitting this article the writer wishes to disclaim any intention of making a contribution to the theory of a subject so thoroughly studied as the circle diagram of polyphase induction motors. But while the theory of the circle diagram may be considered as a closed chapter, its practical application, as a method of determining the characteristics of motors from test data, has not kept pace wi... View full abstract»

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  • Shaft currents in electric machines

    Publication Year: 1923, Page(s):1325 - 1334
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4031 KB)

    This paper describes the causes of, and remedies for, the existence of “shaft currents” or “bearing currents” which sometimes flow across the rubbing surfaces of the bearings of electric machinery, thereby gradually damaging the shaft and bearings. Up to the present time the only cause of shaft currents that has attracted any particular attention has been the use of sec... View full abstract»

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  • Air-break magnetic blow-outs: For contactors and circuit breakers both A-C. and D-C.

    Publication Year: 1922, Page(s):257 - 266
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6527 KB)

    Magnetic blow-outs have been used in contactors, circuit breakers and controllers for many years for rupturing both a-c. and d-c. power circuits, but their commercial use, particularly on alternating current has been largely confined to relatively low voltages. Oil circuit breakers and switches have been generally used for rupturing high-voltage a-c. power circuits, and their development has reach... View full abstract»

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  • The story of the induction motor

    Publication Year: 1921, Page(s):203 - 223
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5906 KB)

    This paper covers the history of the technical side of the development of the induction motor, principally as the author saw it. It indicates the various stages of development from the early Tesla motor, with polar field construction, to the distributed field construction, and from the early wound-rotor type to the later almost universal cage type. Reference is made to the development of the cage ... View full abstract»

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  • Applications and limitations of thermocouples for measuring temperatures

    Publication Year: 1923, Page(s):851 - 853
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (837 KB)

    E. D. Tanzer: Not so long ago, a thermocouple was solely a physicists instrument. At the present time, however, it has a wide field of application among the operating companies. At least, we of the Philadelphia Electric Company, during the past three years have used it extensively in field determinations of the operating temperatures of cable duct lines, cable sheaths and transformer manholes, as ... View full abstract»

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  • Theory of speed and power factor control of large induction motors by neutralized polyphase alternating current commutator machines

    Publication Year: 1920, Page(s):458 - 470
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3229 KB)

    Theory of induction motor control, discussing single-range (below synchronism only) speed and power factor control by means of a constant-speed series commutator motor, by means of a constant-speed shunt commutator motor, by means of a constant-speed compound excited commutator motor; double-range (all speeds above or below synchronism) speed and power factor control by means of a constant-speed s... View full abstract»

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  • Eddy current losses in armature conductors

    Publication Year: 1920, Page(s): 547
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (243 KB)

    THIS paper covers the development of formulas and curve data which permit of the ready calculation of the eddy current losses in armature conductors. View full abstract»

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  • The cooling of electric machines

    Publication Year: 1923, Page(s):1278 - 1288
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2127 KB)

    THE disposal of the heat resulting from the electrical and mechanical losses in any electric machine is always an important item to the designer as well as to the operator of the machine. These losses appearing all in the form of heat must be transferred from their source with a temperature gradient not to exceed the maximum safe operating temperatures. These maximum temperatures are limited by th... View full abstract»

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  • The wave antenna: A new type of highly directive antenna

    Publication Year: 1923, Page(s):636 - 644
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1724 KB)

    Determination of Constants from Input Impedance. Fig. 61 shows a generator (or oscillator) supplying alternating current to a line. This results in waves which travel from A to B. Assuming for the time being that there is no reflection at B and no return waves, the relation of voltage to current is E/I = Z in which Z is the surge impedance of the line. When the generator makes the point A p... View full abstract»

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  • The production of porcelain for electrical insulation — I

    Publication Year: 1923, Page(s):343 - 346
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2588 KB)

    This series of articles is presented with a riew of acquainting the electrical engineer with the composition of porcelain, the raw materials, and processes employed in its manufacture, and with the structure and the physical properties of the finished product. The principles underlying the art will be discussed as well as the reasons for using certain materials or certain processes. Recent develop... View full abstract»

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  • The wave antenna: A new type of highly directive antenna

    Publication Year: 1923, Page(s):510 - 519
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1909 KB)

    Fig. 43 shows the relations between Ib, Ia and the reflected current, for θ = 180 deg. View full abstract»

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  • An arrangement of the circle diagram

    Publication Year: 1922, Page(s):687 - 688
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (399 KB)

    IT is a well known fact that the Behrend-Heyland circle diagram for the “picturization” of the characteristics of the induction motor among all its advantages has a great draw-back, viz: its “space efficiency,” if I may say so, being very low. We all know that the most important part of the diagram is confined to a small fraction of the diagram sheet, and that precision... View full abstract»

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  • Technical problems of the tanning industry

    Publication Year: 1922, Page(s):646 - 649
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3404 KB)

    The object of this article is to present a composite engineering view of one of the world's oldest industries, for the purpose of directing the attention of the electrical engineer toward some of the more urgent requirements of this industry, which, being primarily electrical, he in particular is peculiarly able to furnish. The article outlines engineering principles applied in the art of leather ... View full abstract»

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  • The wave antenna a new type of highly directive antenna

    Publication Year: 1923, Page(s):258 - 269
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (7103 KB)

    Review of the Subject. — A small bungalow in a grove of oak trees just outside of Riverhead, Long Island, with a line of poles along a country road, carrying two copper wires, and ending by a stream nine miles southwest of Riverhead, — this in brief describes the Atlantic coast “ear” of the Radio Corporation of America, where the wireless messages from England, France, ... View full abstract»

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  • Proximity effect in wires and thin tubes

    Publication Year: 1923, Page(s):961 - 970
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1473 KB)

    Formulas are given, with examples, for the following new problems in proximity effect resistance ratio: Thin Tube and Infinitesimal Wire; Two Thin Tubes in Return Circuit; Two Thin Tubes in Parallel; Insulated Cable Sheaths in Single-Phase Circuit; Cable Sheaths in Three-Phase Circuit, Flat Spacing; Finite Wire and Infinitesimal Wire; Two Wires in Parallel; Three-Phase Circuit, Triangular Spacing,... View full abstract»

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  • Features of main power house transformers for Queenston plant

    Publication Year: 1922, Page(s):452 - 459
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4083 KB)

    Interest in the main step-up transformers for the New Queenston generating station of the Hydro-Electric Power Commission of Ontario centers largely about their great physical size and the heavy short-circuit currents to be dealt with. Physically they are the largest single-phase transformers in operation today. In spite of the fact that they are for 25-cycle service, to our knowledge even their k... View full abstract»

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  • Heat losses in stranded armature conductors

    Publication Year: 1922, Page(s):37 - 49
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1868 KB)

    In the present paper, which is a continuation of one presented at the last annual convention, the author extends the method of complex hyperbolic functions to the solution of the problem of heat losses in stranded conductors embedded in rectangular slots. In the preceding paper the discussion was confined to solid conductors and to those having an infinite number of strands. In the latter case, th... View full abstract»

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  • Wave form and amplification of corona discharge

    Publication Year: 1922, Page(s):662 - 663
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (567 KB)

    J. H. Morecroft: There is only one point on which I can add anything and that is on the use of the vacuum tube as a voltage rectifier. It is an experimental instrument not used very much as yet by electrical engineers, but as Dr. Hull told us some time ago, it will be used by every engineer very soon. There are certain cases where voltages are to be measured where it is impossible to get the measu... View full abstract»

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  • Submarine detection in an alternating magnetic field

    Publication Year: 1920, Page(s):381 - 395
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3235 KB)

    It has been mentioned that when using a detecting instrument of quite high sensitivity it is necessary to go to very large sizes of the magnet and detecting coil, in order to reach even moderate distances of detection, if no other means are used for increasing the sensitivity. 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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Aims & Scope

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

Full Aims & Scope