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Electrical Engineering

Issue 7 • Date July 1947

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Displaying Results 1 - 25 of 47
  • [Front cover]

    Publication Year: 1947 , Page(s): c1
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    Freely Available from IEEE
  • [Front inside cover]

    Publication Year: 1947 , Page(s): c2
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    Freely Available from IEEE
  • Contents

    Publication Year: 1947 , Page(s): 1
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  • [Advertisement]

    Publication Year: 1947 , Page(s): 2A
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  • Highlights

    Publication Year: 1947 , Page(s): 3A
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    Freely Available from IEEE
  • [Advertisement]

    Publication Year: 1947 , Page(s): 4A - 12A
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  • Atomic energy in industry

    Publication Year: 1947 , Page(s): 631 - 638
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    The potential value of atomic energy to industry is currently the subject of much speculation. An evaluation of the situation indicates that although atomic energy is not producing commercially useful power as yet, such production is technically possible. However, it is likely that by-products of atomic energy such as radioactive isotopes and fission products will prove of more immediate importance to society. View full abstract»

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  • The physics of electronic semiconductors

    Publication Year: 1947 , Page(s): 638 - 641
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    The band theory of solids is capable of explaining such fundamental properties of electronic semiconductors as the dependency of specific resistance on impurity content, the negative temperature coefficient of resistance, the sign of the Hall and thermoelectric effects, and the direction of rectification. Measurements of the specific resistance and the Hall constant enable the calculation of density, mobility, and mean free path of the electric carriers as a function of temperature and impurity. View full abstract»

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  • Electric eddy current machinery

    Publication Year: 1947 , Page(s): 643 - 646
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    The electromagnetic dynamometer and slip-coupling units are a valuable aid in many motor applications. Though of relatively recent development this machinery has found application in the automotive industry, aircraft testing, ship propulsion, and with punch presses. View full abstract»

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  • Test of silicones for shipboard use

    Publication Year: 1947 , Page(s): 647 - 649
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    Naval electric power equipment, as well as commercial machines, may be reduced in size and weight by the development of new silicone insulating materials. Tests are still in progress which indicate that fire and arc resisting products will be obtained that can also meet other Navy specifications. View full abstract»

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  • Radiation detector

    Publication Year: 1947 , Page(s): 649
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    Radiations from exploding atoms are counted at the rate of 100,000 each second by a radiation detector developed by the Westinghouse Research Laboratories. The new detector is said to be 50 times more effective than the standard Geiger counter whose limit is about 2,000 radiations per second. View full abstract»

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  • Cable carrier developments

    Publication Year: 1947 , Page(s): 650 - 656
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    The K2 telephone cable carrier system is providing dependable long distance communication with improved performance at reduced cost, saving in raw materials. The portable testing equipment developed for use on the K2 system also can be used to test the K1 system and certain open wire channels. View full abstract»

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  • X-raying oil fields

    Publication Year: 1947 , Page(s): 656
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    A method of X-raying oil fields by remote operation from its research laboratories has been developed by Gulf Oil Corporation. The new development helps solve the riddle of how oil flows through the sand and rocks under any particular field, and how it is affected by underground water and gas. View full abstract»

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  • Power supply for resistance welding: A co-operative approach

    Publication Year: 1947 , Page(s): 657 - 662
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    Co-operation among the electrical utility, the welding equipment manufacturer, and the industrial user is the prime condition for a satisfactory solution to the power supply problem in the resistance welding field. A discussion of one method of approach to the problem is presented as a contribution to the promotion of mutual understanding among the parties concerned. View full abstract»

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  • Electric power in the cotton industry

    Publication Year: 1947 , Page(s): 662 - 666
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    Though the cotton industry ranks among the oldest in the United States, its adoption of electric power has been a fairly recent development, perhaps because long-time use had brought mechanical power to a high degree of refinement. The extent to which electric power has infiltrated cotton manufacturing processes is described here. View full abstract»

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  • Power distribution in textile plants

    Publication Year: 1947 , Page(s): 667 - 669
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    The development of electric power distribution and utilization is not complete although great strides have been made since the days of water wheels. The cotton textile industry continuously is adapting new methods and discoveries to the improvement of production and replacement of existing facilities. View full abstract»

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  • Axial-air-gap motor

    Publication Year: 1947 , Page(s): 670 - 671
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    New manufacturing techniques have made possible a practical axial-air-gap motor which offers several advantages as to size and weight. Various construction problems were encountered in the production. The motor is primarily a flange-mounted machine which is particularly adaptable to machine tools and gear units. Simplicity and speed of inspection, cleaning, and lubrication are claimed for the motor. View full abstract»

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  • Wood-pole line insulation tests

    Publication Year: 1947 , Page(s): 672 - 677
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    The need for more complete data on the performance of wood, both in regard to impulse and power-frequency operation, has been recognized for some time. Although certain fundamental data are still lacking, much has been learned from laboratory tests about the use of wood as an insulating material. The economic importance of wood-pole line makes these test data valuable assets in the consideration of materials for high-voltage installations. View full abstract»

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  • A cathode-ray B — H tracer

    Publication Year: 1947 , Page(s): 678 - 680
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    The cathode-ray oscilloscope and associated equipment can be used for the quantitative determination of magnetic properties without compensation for end effects. This equipment provides a method not only for obtaining core loss and permeability, but also for obtaining retentivity and coercive force and degree of saturation of the test specimen. View full abstract»

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  • Air-borne magnetometers

    Publication Year: 1947 , Page(s): 680 - 685
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    Developed under the impetus of the submarine menace of World War II, the airborne magnetometer has found many peacetime uses. Navy airplanes equipped with magnetometers for exploration of Antarctica were used in the recent United States Navy expedition. An expedition now is studying the Aleutian Alaskan volcanos and the Aleutian submarine trench. From there it will proceed to Hawaii and Bikini. View full abstract»

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  • Detecting impurities in uranium

    Publication Year: 1947 , Page(s): 685
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    Thirty-three impurity elements, some in concentrations as low as one part in 20 million, have been detected and estimated through a modified spectrographic method developed at the National Bureau of Standards and used since 1942 in the Manhattan Project for analysis of uranium and its compounds. View full abstract»

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  • Progress in light sources

    Publication Year: 1947 , Page(s): 686 - 694
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    Developments in light sources since and before World War II have been extensive, and the effect of light on the total field of view of human vision is being considered more and more in artificial illumination. Incandescent light sources, which include arc and filament lamps, and vapor discharge sources, which include metallic vapor discharge and hot- and cold-cathode fluorescent lamps, have many different characteristics which make them suitable for various applications, but no one type of lamp is suited for all purposes. View full abstract»

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  • Dynamic braking of D-C motors

    Publication Year: 1947 , Page(s): 694 - 697
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    Automatic dynamic braking in event of power failure for two d-c series motors can be accomplished in several ways. The method will be determined by service requirements. View full abstract»

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  • Insulation resistance measurements

    Publication Year: 1947 , Page(s): 698 - 703
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    The simplification stated by Ohm's law — resistance is the ratio of potential to current — is qualified for insulation materials. The current quantity is shown to be a superposition of four more or less independent components, each with different characteristics. This approach produces a method for eliminating common errors and inaccuracies from insulation resistance measurements. View full abstract»

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  • X-ray image storing phosphors

    Publication Year: 1947 , Page(s): 703
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    Phosphors may be produced which store energy from X rays, beta rays, gamma rays, and visible light, and which hold this energy for indefinite periods of time. The energy is released, in the form of light varying from red to ultraviolet, by infrared radiation with speed of release governed by intensity of the infrared radiation. View full abstract»

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Aims & Scope

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

Full Aims & Scope