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Urban Transit Systems

  • 1 Urban Transit Systems

    эк., стат., амер. деятельность городского общественного транспорта (по NAICS 2002: отраслевая группа, в которую включены организации, занимающиеся внутригородскими перевозками пассажиров используя трамваи, троллейбусы, автобусы, метро; и пригородными перевозками на электричках)
    See:

    Англо-русский экономический словарь > Urban Transit Systems

  • 2 Transit and Ground Passenger Transportation

    Англо-русский экономический словарь > Transit and Ground Passenger Transportation

  • 3 low emission

    фраз. низкое выделение; с низким выделением; пониженные выделения

    A more likely scenario seems to be a combination of mass transit systems for travel into and around cities, with small 'low emission' cars for urban use and larger hybrid or lean burn cars for use elsewhere.

    Англо-русский универсальный дополнительный практический переводческий словарь И. Мостицкого > low emission

  • 4 Sprague, Frank Julian

    [br]
    b. 25 July 1857 Milford, Connecticut, USA
    d. 25 October 1934 New York, USA
    [br]
    American electrical engineer and inventor, a leading innovator in electric propulsion systems for urban transport.
    [br]
    Graduating from the United States Naval Academy, Annapolis, in 1878, Sprague served at sea and with various shore establishments. In 1883 he resigned from the Navy and obtained employment with the Edison Company; but being convinced that the use of electricity for motive power was as important as that for illumination, in 1884 he founded the Sprague Electric Railway and Motor Company. Sprague began to develop reliable and efficient motors in large sizes, marketing 15 hp (11 kW) examples by 1885. He devised the method of collecting current by using a wooden, spring-loaded rod to press a roller against the underside of an overhead wire. The installation by Sprague in 1888 of a street tramway on a large scale in Richmond, Virginia, was to become the prototype of the universally adopted trolley system with overhead conductor and the beginning of commercial electric traction. Following the success of the Richmond tramway the company equipped sixty-seven other railways before its merger with Edison General Electric in 1890. The Sprague traction motor supported on the axle of electric streetcars and flexibly mounted to the bogie set a pattern that was widely adopted for many years.
    Encouraged by successful experiments with multiple-sheave electric elevators, the Sprague Elevator Company was formed and installed the first set of high-speed passenger cars in 1893–4. These effectively displaced hydraulic elevators in larger buildings. From experience with control systems for these, he developed his system of multiple-unit control for electric trains, which other engineers had considered impracticable. In Sprague's system, a master controller situated in the driver's cab operated electrically at a distance the contactors and reversers which controlled the motors distributed down the train. After years of experiment, Sprague's multiple-unit control was put into use for the first time in 1898 by the Chicago South Side Elevated Railway: within fifteen years multiple-unit operation was used worldwide.
    [br]
    Principal Honours and Distinctions
    President, American Institute of Electrical Engineers 1892–3. Franklin Institute Elliot Cresson Medal 1904, Franklin Medal 1921. American Institute of Electrical Engineers Edison Medal 1910.
    Bibliography
    1888, "The solution of municipal rapid transit", Trans. AIEE 5:352–98. See "The multiple unit system for electric railways", Cassiers Magazine, (1899) London, repub. 1960, 439–460.
    1934, "Digging in “The Mines of the Motor”", Electrical Engineering 53, New York: 695–706 (a short autobiography).
    Further Reading
    Lionel Calisch, 1913, Electric Traction, London: The Locomotive Publishing Co., Ch. 6 (for a near-contemporary view of Sprague's multiple-unit control).
    D.C.Jackson, 1934, "Frank Julian Sprague", Scientific Monthly 57:431–41.
    H.C.Passer, 1952, "Frank Julian Sprague: father of electric traction", in Men of Business, ed. W. Miller, Cambridge, Mass., pp. 212–37 (a reliable account).
    ——1953, The Electrical Manufacturers: 1875–1900, Cambridge, Mass. P.Ransome-Wallis (ed.), 1959, The Concise Encyclopaedia of World Railway
    Locomotives, London: Hutchinson, p. 143..
    John Marshall, 1978, A Biographical Dictionary of Railway Engineers, Newton Abbot: David \& Charles.
    GW / PJGR

    Biographical history of technology > Sprague, Frank Julian

См. также в других словарях:

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