By Topic

Electrical Engineering

Issue 2 • Date Feb. 1949

Filter Results

Displaying Results 1 - 25 of 51
  • [Front cover]

    Publication Year: 1949 , Page(s): c1
    Request Permissions | PDF file iconPDF (20656 KB)  
    Freely Available from IEEE
  • [Advertisement - Front inside cover]

    Publication Year: 1949 , Page(s): c2
    Request Permissions | PDF file iconPDF (8967 KB)  
    Freely Available from IEEE
  • Contents

    Publication Year: 1949 , Page(s): 1
    Request Permissions | PDF file iconPDF (352 KB)  
    Freely Available from IEEE
  • [Advertisement]

    Publication Year: 1949 , Page(s): 2A
    Request Permissions | PDF file iconPDF (12207 KB)  
    Freely Available from IEEE
  • Highlights

    Publication Year: 1949 , Page(s): 3A
    Request Permissions | PDF file iconPDF (615 KB)  
    Freely Available from IEEE
  • [Advertisement]

    Publication Year: 1949 , Page(s): 4A - 12A
    Request Permissions | PDF file iconPDF (58696 KB)  
    Freely Available from IEEE
  • A rectified A-C electric system for aircraft

    Publication Year: 1949 , Page(s): 95 - 101
    Request Permissions | Click to expandAbstract | PDF file iconPDF (3669 KB)  

    The use of electricity as a service component of aircraft has progressed to a degree which taxes the available generator drive capacity on main engines, a deficiency which has resulted in material improvements in generator design. To provide adequate generator capacity on one recently developed airplane, it was necessary to use a relatively unconventional system employing main-engine-driven low-vo... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Electricity is an integral part of agriculture

    Publication Year: 1949 , Page(s): 102 - 106
    Request Permissions | Click to expandAbstract | PDF file iconPDF (7935 KB)  

    It has been proved that electricity is an essential element in the progress of agriculture. Because of the great interest throughout the electrical industry in the application of electricity to farming, this article discusses the growth of farm electrification and indicates the problem involved in increased need for rural service. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Use of Sonar in Harbor defense and amphibious landing operations

    Publication Year: 1949 , Page(s): 107 - 114
    Request Permissions | Click to expandAbstract | PDF file iconPDF (7782 KB)  

    During World War II, harbors were guarded against sneak attacks by enemy submarines by a device known as Herald. To install, operate, and maintain equipment sufficiently simple for use at frontier bases required considerable development, including such engineering problems as submerged installations, remote controls, and operating adjustments. Ultrasonic devices also were developed, for use in est... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Feeder voltage regulator application

    Publication Year: 1949 , Page(s): 115
    Request Permissions | Click to expandAbstract | PDF file iconPDF (536 KB)  

    PROPER VOLTAGE LIMITS have been established by the joint Edison Electric Institute-National Electrical Manufacturers Association committee on preferred voltage ratings for a-c systems and equipment. Many regulatory commissions have established voltage limits for power utilities operating within their jurisdiction. To stay within these established limits the design voltage drop from the primary at ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Frequency modulation design trends

    Publication Year: 1949 , Page(s): 116
    Request Permissions | Click to expandAbstract | PDF file iconPDF (1385 KB)  

    IN OCTOBER OF 1940, 15 construction permits for commercial frequency modulation stations were granted by the Federal Communications Commission (FCC). The beginning of commercial frequency modulation was received enthusiastically by the radio industry as well as the public. Advance advertising had created considerable public demand for the static-free and high fidelity performance promised by frequ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Planning a large all-hydroelectric system

    Publication Year: 1949 , Page(s): 117 - 121
    Request Permissions | Click to expandAbstract | PDF file iconPDF (3077 KB)  

    This article presents a summary of the development of the all-hydroelectric Southern Ontario system of the Hydro-Electric Power Commission of Ontario, in Canada, and discusses the major factors to be considered in planning this type of electric power supply system. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Electronic protective relays

    Publication Year: 1949 , Page(s): 122 - 128
    Request Permissions | Click to expandAbstract | PDF file iconPDF (8893 KB)  

    Although electromagnetic protective relays are adequate for present requirements, the ever-increasing demand for higher speeds and greater accuracy and dependability seems likely to exceed the capabilities of relays now available. However, the trend toward electronic control circuits in other branches of electrical engineering, coupled with the recent improvements in the design and manufacture of ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Precision snap-acting switches

    Publication Year: 1949 , Page(s): 128 - 134
    Request Permissions | Click to expandAbstract | PDF file iconPDF (7614 KB)  

    Diversified use of precision, snap-acting switches began less than 15 years ago and rapidly spread into every type of application where mechanical motion must open and close electric circuits. Their characteristics which differentiate them from other control devices and which give them unique usefulness are outlined in this article. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Methods of stimulating teaching in the power field

    Publication Year: 1949 , Page(s): 135 - 136
    Request Permissions | Click to expandAbstract | PDF file iconPDF (1035 KB)  

    The student trained in the wide-band frequencies will bring more to the power industry than the student trained in 60 cycle alone. To attract the student to the power industry, he must be shown that new and challenging frontiers exist. One of the first steps in the program recommended is the creation of a list of challenging thesis subjects to guide the student to the door of the power industry. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Reversing cycle of modern blooming mills

    Publication Year: 1949 , Page(s): 137
    Request Permissions | Click to expandAbstract | PDF file iconPDF (557 KB)  

    TODAY THE D-C MOTOR with rotating regulator control is the accepted modern standard blooming mill drive in the metal-processing industry. By studying a typical blooming mill with a d-c variable-speed motor drive rated at 7,000 horsepower, 40/100 rpm, 700 volts, and by comparing it with the equivalent ratings in single speed motors, the variable speed one can be justified. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Ground power for aircraft

    Publication Year: 1949 , Page(s): 138
    Request Permissions | Click to expandAbstract | PDF file iconPDF (530 KB)  

    COMMERCIAL and military aircraft have outgrown the days when they could be supplied with electric power while on the ground from a small box of batteries. As may be seen from Table I, the power requirements of an airplane on the ground have risen until this power is measured in thousands of amperes. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Radio influence from high-voltage corona

    Publication Year: 1949 , Page(s): 139 - 143
    Request Permissions | Click to expandAbstract | PDF file iconPDF (3131 KB)  

    This article is the result of a study made in the field of high-voltage power transmission to obtain information regarding radio-frequency propagation which may be expected from corona. Numerous experiments have been made to determine the conditions under which these radiating impulses occur. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Measuring conductor resistance and reactance

    Publication Year: 1949 , Page(s): 144
    Request Permissions | Click to expandAbstract | PDF file iconPDF (453 KB)  

    IN CONNECTION with a study of a-c resistance and reactance of large conductors in steel pipe and conduit, made for the Insulated Power Cable Engineers Association, measurements were made of isolated conductors in air, 3-cabled conductors in air, and finally the 3-cabled conductors in various sizes of conduit. Each of these stages raised measurements problems, especially when it became desirable to... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Electrical essay electromagnetic space-ship

    Publication Year: 1949 , Page(s): 145 - 146
    Request Permissions | Click to expandAbstract | PDF file iconPDF (926 KB)  

    THE USUAL TYPE of powered vehicle requires a material medium upon which the vehicle exerts its thrust or traction. Thus the locomotive pushes back on its track; the propeller-driven airplane pushes back upon the surrounding atmosphere; even the jet-airplane or rocket pushes back on the discharged gases. In this essay is described a means of propulsion which does not require any material medium upo... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Coaxial telephone-television system progress

    Publication Year: 1949 , Page(s): 147
    Request Permissions | Click to expandAbstract | PDF file iconPDF (547 KB)  

    DEVELOPMENT OF the coaxial system was started some time ago, with systems working before the war between New York, N. Y., and Philadelphia, Pa., and between Minneapolis, Minn., and Stevens Point, Wis. There are about 5,000 route miles in service providing almost three million miles of 2-way telephone circuits plus television network facilities. The entire program for the next few years roughly wil... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Rural inductive co-ordination practices

    Publication Year: 1949 , Page(s): 148 - 150
    Request Permissions | Click to expandAbstract | PDF file iconPDF (1341 KB)  

    Many electrical interference problems have arisen with the construction of power lines in the vicinity of communication lines throughout rural America. This article covers the solution of many of the numerous inductive co-ordination problems involving rural power and communication circuits. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Emergency control of system loads

    Publication Year: 1949 , Page(s): 151
    Request Permissions | Click to expandAbstract | PDF file iconPDF (539 KB)  

    THE SMALL MARGIN of reserve capacity existing throughout the electrical utility industry due to war and postwar shortages has created an increasing interest in methods of load reduction to meet temporary emergency conditions until normal capacity can be restored. Voltage and frequency reductions within limits will affect customers very minutely. However, the over-all reduction on a large system ma... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The Great Lakes radiotelephone system

    Publication Year: 1949 , Page(s): 152 - 157
    Request Permissions | Click to expandAbstract | PDF file iconPDF (7783 KB)  

    The system is a highly developed voice system of commercial grade “tailored” especially to the unique needs of the Great Lakes shipping industry, and is an important factor in the efficient operation of approximately 600 vessels. The article describes the many services of the system, as well as the ship's and shore station's equipment. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Safety in machine tool control

    Publication Year: 1949 , Page(s): 157 - 160
    Request Permissions | Click to expandAbstract | PDF file iconPDF (5471 KB)  

    With the ever-increasing use of complex machinery, the subject of safety, both of personnel and of the machines themselves, assumes greater importance. Although faulty control is probably a minor cause of accidents, so long as it is responsible for even a small percentage it requires the best efforts of engineers in the development of the necessary safety features. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

Aims & Scope

This Periodical ceased publication in 1963. The current retitled publication is IEEE Spectrum.

Full Aims & Scope