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American Institute of Electrical Engineers, Transactions of the

Volume 47: 1928

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Displaying Results 1 - 25 of 56
  • Discussion

    Publication Year: 1928 , Page(s): 720 - 721
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  • Welding and Manufacturing of Large Electrical Apparatus

    Publication Year: 1928 , Page(s): 717 - 720
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2744 KB)  

    The object of this paper is to show how extensively electric welding is being used in the fabrication of large electrical apparatus. It outlines the use and advantages of welding for supplanting the casting and machinery of parts and describee briefly the welding equipment developed for this purpose and soms of the electrical machines produced by this method. View full abstract»

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  • Discussion

    Publication Year: 1928 , Page(s): 716 - 717
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  • Arc-Welded Structures and Bridges

    Publication Year: 1928 , Page(s): 711 - 716
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (5078 KB)  

    The use of arc welding for constructing buildings, machinery, bridges, etc., has come into prominence during the past eighteen months, due to the merits of the process becoming recognized by a number of designers. Undoubtedly within the next few years the applications of the process will be extended rapidly as our available data are corroborated and amplified and as the limitations of the process ... View full abstract»

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  • Discussion

    Publication Year: 1928 , Page(s): 710
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  • The Stability of the Welding Arc

    Publication Year: 1928 , Page(s): 706 - 709
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (956 KB)  

    The stability of the iron welding arc is influenced by a number of factors, such as the nature and the aerodynamic state of the surrounding atmosphere, the strength and distribution of the magnetic field, the composition of the electrode, the nature and the amount of gases occluded in the electrode, etc. In this paper, however, only the first item has been discussed in an attempt to show that the ... View full abstract»

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  • Discussion

    Publication Year: 1928 , Page(s): 704 - 705
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  • Metallic Arc Welding Electrodes A Study of the Effects of Surface Materials

    Publication Year: 1928 , Page(s): 700 - 704
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    To understand the effect of surface materials on metallic arc welding electrodes, something must be known as regards the fundamental theory of arc heat distribution, arc vapor resistance, and similar matters which are modified by the presence of surface materials. The character of the arc may be changed by chemical and structural variations in the surface materials. Stability is one such arc chara... View full abstract»

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  • Discussion

    Publication Year: 1928 , Page(s): 696 - 699
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  • Condenser-Type Bushing Used With Synchronizing Equipment

    Publication Year: 1928 , Page(s): 684 - 696
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (4632 KB)  

    This paper describes apparatus recently developed for utilizing the charging current of a condenser bushing in operating a synchronoscope, thus making a simple and inexpensive method of synchronizing at high voltage. Data are given also covering the operation of the device for different conditions of frequency, voltage, etc., thus assisting in the consideration of the adaptability of the device to... View full abstract»

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  • Vacuum Tube Synchronizing Equipment

    Publication Year: 1928 , Page(s): 678 - 683
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    Potential front high-voltage circuits is obtained by means of capacitance transformers. This potential is applied to the grid circuit of vacuum-tube amplifiers, the output from which drives a rotating type of synchroscope. Thus the vacuum-tube synchronizing equipment makes unnecessary costly high-voltage transformers, which have been almost universally used for synchronizing in the past. The paper... View full abstract»

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  • Discussion

    Publication Year: 1928 , Page(s): 674 - 677
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  • 1926 Lightning Experience on 132-Kv. Transmission Lines

    Publication Year: 1928 , Page(s): 668 - 674
    Cited by:  Papers (10)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2198 KB)  

    This paper deals with the interruptions due to lightning on an extensive interconnected 132-kv. system during the year 1926, a similar record covering part of the system having been reported previously.2 A layout of the system is shown and details of the type of line and tower construction are given in considerable detail. The lightning performance of different sections of the line have... View full abstract»

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  • Discussion

    Publication Year: 1928 , Page(s): 665 - 667
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  • Protection of Supervisory Control Lines Against Over-Voltage

    Publication Year: 1928 , Page(s): 655 - 665
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (3351 KB)  

    Supervisory control lines used in the remtote or automatic control of electric plants are subject to overvoltages dangerous to insulation and to operators. These overvoltages may be caused by lightning, crosses with the power lines, or induction from them. Open wire control lines are influenced by all of these, cables with grounded sheaths are immune to disturbances caused by lightning or other el... View full abstract»

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  • Discussion

    Publication Year: 1928 , Page(s): 653 - 654
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  • Automatic Control of Edison Systems As Applied in the St. Charles Street Substation of the Union Electric Light and Power Company

    Publication Year: 1928 , Page(s): 645 - 652
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (3443 KB)  

    A brief description of the Edison System at St. Louis is given, and power supply, service restoration, and system balance are discussed. The history of the application of automatic control equipment to the system and a brief resumé of operating experiences are also given. The relation of the St. Charles St. Substation to the remainder of the system is pointed out and certain features of its desig... View full abstract»

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  • Certain Topics in Telegraph Transmission Theory

    Publication Year: 1928 , Page(s): 617 - 644
    Cited by:  Papers (261)  |  Patents (10)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (5435 KB)  

    The most obvious method for determining the distortion of telegraph signals is to calculate the transients of the telegraph system. This method has been treated by various writers, and solutions are available for telegraph lines with simple terminal conditions. It is well known that the extension of the same methods to more complicated terminal conditions, which represent the usual terminal appara... View full abstract»

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  • Discussion

    Publication Year: 1928 , Page(s): 614 - 616
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  • Loudspeakers of High Efficiency and Load Capacity

    Publication Year: 1928 , Page(s): 607 - 614
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (3166 KB)  

    The design of high quality horn-type loudspeakers with moving coil drivers is considered. Efficiency and maximum output capacity obtainable from this type of loudspeaker are calculated. Methods of providing load capacity greater than that possible with a single loudspeaker are described. View full abstract»

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  • Discussion

    Publication Year: 1928 , Page(s): 606
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  • Effect of Transient Conditions On Application of D-C. Compound Motors

    Publication Year: 1928 , Page(s): 599 - 606
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    When a d-c. compound motor is started, the rise of current in the series field induces a voltage in the shunt field counter to that applied, and the shunt field current may reach several times normal value in a negative direction. This current reversal gives, in effect, a differentially compounded motor during the starting period and causes the starting torque to be materially reduced. In many app... View full abstract»

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  • Discussion

    Publication Year: 1928 , Page(s): 597 - 598
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  • Heat Losses in D-C. Armature Conductors

    Publication Year: 1928 , Page(s): 589 - 596
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1535 KB)  

    The pioneer paper on this subject of copper losses in armature conductors was presented by A. B. Field.4 Since then Field's fundamental premises have been adopted by practically all who have contributed to this subject, both in this country and abroad, although the method of presentation has been modified as the individual thought best. Thus one of the present authors has favored a vect... View full abstract»

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  • Discussion

    Publication Year: 1928 , Page(s): 586 - 588
    Cited by:  Papers (1)
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