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American Institute of Electrical Engineers, Journal of the

Popular Articles (June 2015)

Includes the top 50 most frequently downloaded documents for this publication according to the most recent monthly usage statistics.
  • 1. Radio telegraphy

    Publication Year: 1922 , Page(s): 561 - 570
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (5869 KB)  

    The lecture first deals briefly with the early history of long distance radio communication. The work carried out by the engineers and experts of the Marconi Company in England with electron tubes or triode valves shows that, according to their experience, greater efficiency can be obtained at present by a number of bulbs used in parallel than by the employment of large single unit tubes. Informat... View full abstract»

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  • 2. Experimental determination of short-circuit currents in electric power networks

    Publication Year: 1923 , Page(s): 605 - 617
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2537 KB)  

    No means has yet been discovered whereby the abnormal rise of current occurring during short circuits is avoided. Protection against its destructive effects remains, therefore, a subject of major importance. Among the problems requiring short-circuit current determinations, the following are the chief ones: (1) Selection of oil circuit breakers of the required interrupting capacity. (2). Determina... View full abstract»

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  • 3. Polyphase reaction synchronous motors

    Publication Year: 1923 , Page(s): 1162 - 1168
    Cited by:  Papers (28)
    Save to Project icon | Request Permissions | 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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  • 4. Radiation from transmission lines

    Publication Year: 1923 , Page(s): 95 - 105
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2150 KB)  

    The aim of this investigation was to contribute something to our knowledge of traveling electromagnetic waves. Among the transient phenomena that occur along transmission lines, these are still little known, especially as far as their “attenuation” and “distortion,” or change in shape near the “wave front” are concerned. It is first seen that the “c... View full abstract»

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  • 5. A precise method of calculation of skin effect in isolated tubes

    Publication Year: 1923 , Page(s): 827 - 831
    Cited by:  Papers (9)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1059 KB)  

    A precise method of calculation is describ d for determining the skin effect in isolated tubular conductors. This may be used where more accurate results are desired than are given by the curves and approximate methods of calculation previously published by the writer. The present calculation requires the use of certain numerical values of Bessel functions, a table for which is given. Asymptotic s... View full abstract»

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  • 6. Voltage regulation and insulation for large power, long distance transmission systems

    Publication Year: 1921 , Page(s): 643 - 665
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (14265 KB)  

    Heretofore the distance to which power could be transmitted has been limited. This limitation is now removed by a simple method of loading the line with synchronous condensers, so that the current and voltage may be kept practically in phase. High power factor and hence high efficiency result, and the voltage rises of the system are very much reduced, thus reducing insulation strains. A standard f... View full abstract»

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  • 7. Wave form and amplification of corona discharge

    Publication Year: 1922 , Page(s): 1 - 10
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1948 KB)  

    Corona forms on a round wire or cable when the voltage is raised to such a point that the voltage gradient near the wire is sufficiently high to break down the insulating properties of the air. The larger the wire the higher the voltage to cause corona. The corona is luminous and ionizes the air, giving it electrical conductivity; thus corona has the effect of giving the conductor a larger diamete... View full abstract»

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  • 8. The Petersen earth coil

    Publication Year: 1922 , Page(s): 140 - 148
    Save to Project icon | Request Permissions | 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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  • 9. The physical nature of the electrical breakdown of solid dielectrics

    Publication Year: 1922 , Page(s): 1034 - 1044
    Save to Project icon | Request Permissions | 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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  • 10. The wave antenna a new type of highly directive antenna

    Publication Year: 1923 , Page(s): 258 - 269
    Save to Project icon | Request Permissions | 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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  • 11. Transmission line relay protection — II

    Publication Year: 1922 , Page(s): 839 - 852
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (3320 KB)  

    This paper is divided into three parts, the first part consisting of a list of relay nomenclature according to function and application, the second part being a general discussion on relay protection with special reference to an investigation of the Protective Devices Committee to obtain information on transmission line protective scheme and the third part, an illustrated description of the result... View full abstract»

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  • 12. Skin effect and proximity effect in tubular conductors

    Publication Year: 1922 , Page(s): 203 - 209
    Save to Project icon | Request Permissions | 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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  • 13. Triple harmonics in transformers

    Publication Year: 1922 , Page(s): 351 - 359
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | 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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  • 14. Induction motor core losses

    Publication Year: 1920 , Page(s): 906 - 920
    Cited by:  Papers (16)
    Save to Project icon | Request Permissions | 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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  • 15. Cable geometry and the calculation of current-carrying capacity

    Publication Year: 1923 , Page(s): 525 - 539
    Save to Project icon | Request Permissions | 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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  • 16. Electric power application to passenger and freight elevators

    Publication Year: 1922 , Page(s): 57 - 67
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (3522 KB)  

    This Committee has been requested to report on the application of electric power to passenger and freight elevators. An enormous amount of electric energy is used for the operation of elevators and it is therefore fitting that the problem be studied from a power economy standpoint as well as from the more important standpoint of protection to life and limb. It is assumed that the reader knows litt... View full abstract»

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  • 17. The story of the induction motor

    Publication Year: 1921 , Page(s): 203 - 223
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | 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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  • 18. Philadelphia-Pittsburgh section of the New York-Chicago cable

    Publication Year: 1922 , Page(s): 585 - 595
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (12486 KB)  

    Engineering and construction features involved in a complete telephone cable system over 300 miles in length and connecting Philadelphia and Pittsburgh, Pa. are described in the following paper. This cable is designed to operate as an extension of the Boston-Washington underground cable system with which it connects at Philadelphia. It is also designed for operation in connection with the Pittsbur... View full abstract»

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  • 19. Transient conditions in electric machinery

    Publication Year: 1923 , Page(s): 388 - 407
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (3797 KB)  

    The vector method is just as useful in solving problems involving transient conditions in electric circuits as it has proved to be when the currents and potentials are steady sinusoids. As far as the writer is aware, the vector method for determining transients in rotating electric machines was first used by L. Dreyfus. Previously the method had been applied to fixed combinations of resistances, i... View full abstract»

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  • 20. World communication

    Publication Year: 1921 , Page(s): 885 - 899
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (11279 KB)  

    It is not intended, in this brief presentation of the broad outlines of the important subject of world communication, to do more than touch on the technical methods whereby communication is now being carried on or by which it is expected that communication will be carried on in the future. The subject matter is altogether too voluminous to permit more than a very general summary of the methods now... View full abstract»

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

    Publication Year: 1923 , Page(s): 728 - 732
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2204 KB)  

    Directive Effects for Impulses. The question will naturally arise whether directivity curves calculated for continuous waves, are applicable to the steep wave fronts and pulses of static. The experimental evidence is that they are applicable. It is clear that in the case of the wave antenna, waves on the wire will build up in the direction of travel of the space wave, and relatively feeble waves w... View full abstract»

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  • 22. Features of main power house transformers for Queenston plant

    Publication Year: 1922 , Page(s): 452 - 459
    Save to Project icon | Request Permissions | 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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  • 23. Proximity effect in wires and thin tubes

    Publication Year: 1923 , Page(s): 961 - 970
    Save to Project icon | Request Permissions | 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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  • 24. The effect of transient voltages on dielectrics — III (An investigation with very high lightning voltages)

    Publication Year: 1923 , Page(s): 623 - 630
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (3736 KB)  

    During a thunder storm lightning voltages that reach the transmission line appear across insulators, transformers and other apparatus at the extremely rapid rate of millions of volts per second. With this rapid rate of application the voltage may reach a very high value in a microsecond (millionth of a second). Hence, since there is always a delay or lag in the breakdown of insulation, quite pecul... View full abstract»

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  • 25. 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
    Save to Project icon | Request Permissions | 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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  • 26. The wave antenna: A new type of highly directive antenna

    Publication Year: 1923 , Page(s): 372 - 381
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1653 KB)  

    Case II. Signal at an Angle to Antenna, Zero Loss Antenna. So far we have considered only signal waves traveling in the direction of the antenna. To calculate the directive properties of the antenna, we must find the effect of a signal of the same wave length and intensity coming at an angle to the antenna. In the first place there will be a difference in the electromotive force E0 indu... View full abstract»

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  • 27. The production of porcelain for electrical insulation — I

    Publication Year: 1923 , Page(s): 343 - 346
    Save to Project icon | Request Permissions | 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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  • 28. Turbine reduction gears versus electric propulsion for ships

    Publication Year: 1921 , Page(s): 724 - 729
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1604 KB)  

    The question of whether electric or geared propulsion should be used depends entirely upon the type and operating conditions of the vessel. The Navy Department after years of comparative study, and having actual operating data on electrically propelled vessels available, has decided to equip all the larger Navy vessels with electric drive. In this type of ship, electric drive has a decided advanta... View full abstract»

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  • 29. Skin effect in large stranded conductors at low frequencies

    Publication Year: 1921 , Page(s): 757 - 763
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1272 KB)  

    The resistance of metallic conductors is higher for alternating currents than for direct currents, due to the so-called “skin-effect”. With alternating currents, the distribution is not uniform throughout the cross-section, there being a tendency for the current to concentrate towards the outside of the conductor, thus causing an increase of resistance and consequent increase of powe... View full abstract»

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  • 30. Radiation from transmission lines

    Publication Year: 1921 , Page(s): 789 - 790
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (500 KB)  

    The problem of radiation losses from transmission lines on which high-frequency currents are transmitted has become of considerable practical interest in view of the fact that in carrier wave transmission over wires, frequencies are now employed which are comparable with those utilized in radio communication. In discussing this problem I shall confine myself to a brief examination of two particula... View full abstract»

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  • 31. Resistance neutralization: An application of thermionic amplifier circuits

    Publication Year: 1922 , Page(s): 234 - 248
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2736 KB)  

    A power amplifier may be so connected to the circuit supplying the power to be amplified that it introduces terms into the equation for the current in the power circuit which subtract from the resistance terms. Upon this fact depends the operation of the device as a generator of sustained oscillations, as a regenerative amplifier, and as a resistance neutralizer. In the treatment of oscillating au... View full abstract»

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  • 32. Stability of high-power generating stations

    Publication Year: 1920 , Page(s): 554 - 556
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (686 KB)  

    WITH the increasing use of electric power, the size of electric generating systems has steadily increased, from the small high-frequency stations of the early days, to the huge metropolitan systems of today. This created the problem of limiting the destructiveness of the power which can accidently be concentrated at any point of the system. View full abstract»

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  • 33. Electric crane controllers

    Publication Year: 1922 , Page(s): 313 - 319
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1683 KB)  

    Other papers in the series on electrical apparatus for cranes deal with the requirements as to motors and auxiliary equipment; the latter comprising brakes, overload protective panels and limit switches. This paper on controllers reviews its subject in a general way, without going into any details of the devices employed, presenting a clear view of the fundamental considerations involved. The cont... View full abstract»

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  • 34. Physical interpretation of complex angles and their functions

    Publication Year: 1923 , Page(s): 155 - 164
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2129 KB)  

    A child's idea of an angle is a corner or edge; the sharper the corner or edge, the smaller is the angle, and hence expressions like “acute (sharp) angle,” “obtu e (blunt) angle,” etc. With a little schooling his idea of an angle is broadened into that of turning or rotation and finds a geometrical expression in a circle. The amount of turning is represented by the area... View full abstract»

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

    Publication Year: 1923 , Page(s): 1255 - 1256
    Save to Project icon | Request Permissions | 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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  • 36. The electric hammer

    Publication Year: 1922 , Page(s): 297 - 305
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (3480 KB)  

    The power hammer has been in use for a long time and there are now on the market many types of power-operated hammers which may be roughly classed according to the nature of the power as follows: Pneumatic, steam, motor and pulley; cam or crank, and electropneumatic drives. The pneumatic drive includes all riveting hammers; the steam drive includes practically all forge hammers, some drop hammers,... View full abstract»

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  • 37. Dielectric strength ratio between alternating and direct voltages

    Publication Year: 1923 , Page(s): 706 - 712
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1568 KB)  

    High-Voltage insulation testing has been and is usually still done by alternating voltages. High direct voltage was made available for testing purposes by the development of the kenotron tube. When used for testing insulation direct voltage has several advantages over alternating voltage. (1) the power necessary is often much less with direct voltage than with alternating voltage. In apparatus of ... View full abstract»

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  • 38. High-frequency iron losses

    Publication Year: 1920 , Page(s): 809 - 813
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (990 KB)  

    Data are presented giving the iron losses for five-mil, 4 per cent silicon steel sheet for a range of frequencies from 5000 to 50,000 cycles per second. An approximate separation of hysteresis and eddy current losses is made showing the result of skin effect on these losses. A method of test is described which if desired could be used over a much wider range of frequencies than those indicated. Th... View full abstract»

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  • 39. Shaft currents in electric machines

    Publication Year: 1923 , Page(s): 1325 - 1334
    Save to Project icon | Request Permissions | 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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  • 40. The measurement of power in polyphase circuits

    Publication Year: 1923 , Page(s): 205 - 218
    Save to Project icon | Request Permissions | 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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  • 41. Reactive power and magnetic energy

    Publication Year: 1920 , Page(s): 448 - 454
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1344 KB)  

    The relation between reactive power and magnetic and electrostatic energies is stated and proved and its utility is illustrated by deriving the connection between reactive power and the size of machines, between the magnetic energy of an a-c. system and the field excitations of the synchronous machines therein, and by giving the physical significance of power factor under unbalanced conditions. View full abstract»

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  • 42. A direct recording method of measuring magnetic flux distribution

    Publication Year: 1920 , Page(s): 583 - 587
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (3710 KB)  

    General Problem IN undertaking an investigation in some of the more elusive refinements of dynamo-electric machinery design it became necessary to measure and analyze such a multitude of curves of flux distribution, that the labor and time required by existing methods practically prohibited the investigation. After some experimentation the method described was developed, which has the advantages o... View full abstract»

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  • 43. Dissymmetrical electrical conducting networks

    Publication Year: 1923 , Page(s): 985
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (305 KB)  

    F. S. Dellenbaugh, Jr.: The extreme simplicity with which complex circuits may be worked down to a simple circuit is really extraordinary. As you will notice in the bibliography, Dr. Kennelly was the first to publish “The Equivalence of Triangles and Three-pointed Stars,” in other words, star-delta transformations in 1899, and it has been a little over 23 years that this process has ... View full abstract»

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  • 44. Operating performance of a Petersen Earth Coil

    Publication Year: 1923 , Page(s): 904 - 914
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2332 KB)  

    This paper is a report on the Alabama Power Company's operating experience with a Petersen Earth Coil installed between the neutral and ground of a 120-mile, 44,000-volt, 3-phase, star-connected, 60-cycle system. A Petersen coil is essentially an inductive reactance of such value as to maintain resonance with the capacitance of the system to ground at the fundamental system frequency. With a groun... View full abstract»

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  • 45. Synchronous motors for ship propulsion

    Publication Year: 1921 , Page(s): 369 - 373
    Save to Project icon | Request Permissions | 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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  • 46. The current-carrying capacity of lead-covered cables

    Publication Year: 1920 , Page(s): 831 - 839
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1928 KB)  

    This article gives data whereby the carrying capacity of lead-covered cables can be calculated on the basis of thermal limitations. Carrying capacity as limited by voltage drop or economical considerations is not discussed. The article shows how further data can be applied as these are determined. An appendix contains some numerical examples illustrating the use of the data. It also contains a cha... View full abstract»

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  • 47. Key West-Havana submarine telephone cable system

    Publication Year: 1922 , Page(s): 184 - 202
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (6534 KB)  

    The system discussed in this paper includes three single-core continuously loaded submarine cables, each of which provides, in addition to a telephone channel, direct-current and carrier-current duplex telegraph channels. A description is given of the design and construction of the cables, of the method of superposing the various channels on each cable and of the terminal apparatus used for their ... View full abstract»

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  • 48. A vacuum-tube alternating-current potentiometer

    Publication Year: 1921 , Page(s): 900 - 904
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1738 KB)  

    A description is given of an alternating-current potentiometer which is suitable for the measurement of electromotive forces having frequencies up to 10,000 cycles per second. Both the phase and magnitude are read directly from the dial settings. A special type of a-c. differential galvanometer used in connection with the potentiometer is also described. View full abstract»

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  • 49. National exposition of chemical industries

    Publication Year: 1920 , Page(s): 602
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (306 KB)  

    The Sixth National Exposition of Chemical Industries will be held in Grand Central Palace, New York, during the week September 20th to 25th inclusive. This will be the largest distinctly industrial exposition ever held, surpassing its own predecessors by one-third. It is to be divided into three special sections, one, the Electric Furnace Section, another the Fuel Economy Section, and the third a ... View full abstract»

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  • 50. Applications for election

    Publication Year: 1920 , Page(s): 617 - 619
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    Applications have been received by the Secretary from the following candidates for election to membership in the Institute. Unless otherwise indicated, the applicant has applied for admission as an Associate. If the applicant has applied for direct admission to a higher grade than Associate, the grade follows immediately after the name. Any member, objecting to the election of any of these candida... 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