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Trinity High School

  • 1 THS

    4) Юридический термин: The Head Shooters
    5) Сокращение: Tactical Hybrid Switch
    9) Деловая лексика: Temporary Holiday Site
    10) Расширение файла: Thesaurus dictionary (WordPerfect for Windows)
    11) Общественная организация: Titanic Historical Society
    12) Аэропорты: Sukhothai, Thailand

    Универсальный англо-русский словарь > THS

  • 2 ths

    4) Юридический термин: The Head Shooters
    5) Сокращение: Tactical Hybrid Switch
    9) Деловая лексика: Temporary Holiday Site
    10) Расширение файла: Thesaurus dictionary (WordPerfect for Windows)
    11) Общественная организация: Titanic Historical Society
    12) Аэропорты: Sukhothai, Thailand

    Универсальный англо-русский словарь > ths

  • 3 Fessenden, Reginald Aubrey

    [br]
    b. 6 October 1866 East Bolton, Quebec, Canada
    d. 22 July 1932 Bermuda
    [br]
    Canadian radio pioneer who made the first known broadcast of speech and music.
    [br]
    After initial education at Trinity College School, Port Hope, Ontario, Fessenden studied at Bishops University, Lennoxville, Quebec. When he graduated in 1885, he became Principal of the Whitney Institute in Bermuda, but he left the following year to go to New York in pursuit of his scientific interests. There he met Edison and eventually became Chief Chemist at the latter's Laboratory in Orange, New Jersey. In 1890 he moved to the Westinghouse Electric and Manufacturing Company, and two years later he returned to an academic career as Professor of Electrical Engineering, initially at Purdue University, Lafayette, Indiana, and then at the Western University of Pennsylvania, where he worked on wireless communication. From 1900 to 1902 he carried out experiments in wireless telegraphy at the US Weather Bureau, filing several patents relating to wire and liquid thermal detectors, or barretters. Following this he set up the National Electric Signalling Company; under his direction, Alexanderson and other engineers at the General Electric Company developed a high-frequency alternator that enabled him to build the first radiotelephony transmitter at Brant Rock, Massachusetts. This made its initial broadcast of speech and music on 24 December 1906, received by ship's wireless operators several hundred miles away. Soon after this the transmitter was successfully used for two-way wireless telegraphy communication with Scotland. Following this landmark event, Fessenden produced numerous inventions, including a radio compass, an acoustic depth-finder and several submarine signalling devices, a turboelectric drive for battleships and, notably, in 1912 the heterodyne principle used in radio receivers to convert signals to a lower (intermediate) frequency.
    [br]
    Principal Honours and Distinctions
    Institute of Electrical and Electronics Engineers Medal of Honour 1921.
    Bibliography
    US patents relating to barretters include nos. 706,740, 706,742 and 706,744 (wire, 1902) and 731,029 (liquid, 1903). His invention of the heterodyne was filed as US patent no. 1,050,441 (1913).
    Further Reading
    Helen M.Fessenden, 1940, Fessenden. Builder of Tomorrow. E.Hawkes, 1927, Pioneers of Wireless, London: Methuen. O.E.Dunlop, 1944, Radio's 100 Men of Science.
    KF

    Biographical history of technology > Fessenden, Reginald Aubrey

  • 4 Parsons, Sir Charles Algernon

    [br]
    b. 13 June 1854 London, England
    d. 11 February 1931 on board Duchess of Richmond, Kingston, Jamaica
    [br]
    English eingineer, inventor of the steam turbine and developer of the high-speed electric generator.
    [br]
    The youngest son of the Earl of Rosse, he came from a family well known in scientific circles, the six boys growing up in an intellectual atmosphere at Birr Castle, the ancestral home in Ireland, where a forge and large workshop were available to them. Charles, like his brothers, did not go to school but was educated by private tutors of the character of Sir Robert Ball, this type of education being interspersed with overseas holiday trips to France, Holland, Belgium and Spain in the family yacht. In 1871, at the age of 17, he went to Trinity College, Dublin, and after two years he went on to St John's College, Cambridge. This was before the Engineering School had opened, and Parsons studied mechanics and mathematics.
    In 1877 he was apprenticed to W.G.Armstrong \& Co. of Elswick, where he stayed for four years, developing an epicycloidal engine that he had designed while at Cambridge. He then moved to Kitson \& Co. of Leeds, where he went half shares in a small experimental shop working on rocket propulsion for torpedoes.
    In 1887 he married Katherine Bethell, who contracted rheumatic fever from early-morning outdoor vigils with her husband to watch his torpedo experiments while on their honeymoon! He then moved to a partnership in Clarke, Chapman \& Co. at Gateshead. There he joined the electrical department, initially working on the development of a small, steam-driven marine lighting set. This involved the development of either a low-speed dynamo, for direct coupling to a reciprocating engine, or a high-speed engine, and it was this requirement that started Parsons on the track of the steam turbine. This entailed many problems such as the running of shafts at speeds of up to 40,000 rpm and the design of a DC generator for 18,000 rpm. He took out patents for both the turbine and the generator on 23 April 1884. In 1888 he dissolved his partnership with Clarke, Chapman \& Co. to set up his own firm in Newcastle, leaving his patents with the company's owners. This denied him the use of the axial-flow turbine, so Parsons then designed a radial-flow layout; he later bought back his patents from Clarke, Chapman \& Co. His original patent had included the use of the steam turbine as a means of marine propulsion, and Parsons now set about realizing this possibility. He experimented with 2 ft (61 cm) and 6 ft (183 cm) long models, towed with a fishing line or, later, driven by a twisted rubber cord, through a single-reduction set of spiral gearing.
    The first trials of the Turbinia took place in 1894 but were disappointing due to cavitation, a little-understood phenomenon at the time. He used an axial-flow turbine of 2,000 shp running at 2,000 rpm. His work resulted in a far greater understanding of the phenomenon of cavitation than had hitherto existed. Land turbines of up to 350 kW (470 hp) had meanwhile been built. Experiments with the Turbinia culminated in a demonstration which took place at the great Naval Review of 1897 at Spithead, held to celebrate Queen Victoria's Diamond Jubilee. Here, the little Turbinia darted in and out of the lines of heavy warships and destroyers, attaining the unheard of speed of 34.5 knots. The following year the Admiralty placed their first order for a turbine-driven ship, and passenger vessels started operation soon after, the first in 1901. By 1906 the Admiralty had moved over to use turbines exclusively. These early turbines had almost all been direct-coupled to the ship's propeller shaft. For optimum performance of both turbine and propeller, Parsons realized that some form of reduction gearing was necessary, which would have to be extremely accurate because of the speeds involved. Parsons's Creep Mechanism of 1912 ensured that any errors in the master wheel would be distributed evenly around the wheel being cut.
    Parsons was also involved in optical work and had a controlling interest in the firm of Ross Ltd of London and, later, in Sir Howard Grubb \& Sons. He he was an enlightened employer, originating share schemes and other benefits for his employees.
    [br]
    Principal Honours and Distinctions
    Knighted. Order of Merit 1927.
    Further Reading
    A.T.Bowden, 1966, "Charles Parsons: Purveyor of power", in E.G.Semler (ed.), The Great Masters. Engineering Heritage, Vol. II, London: Institution of Mechanical Engineers/Heinemann.
    IMcN

    Biographical history of technology > Parsons, Sir Charles Algernon

  • 5 Pilkington, Sir Lionel Alexander Bethune (Alastair)

    SUBJECT AREA: Chemical technology
    [br]
    b. 7 January 1920 Calcutta, India
    [br]
    English inventor of the float-glass process.
    [br]
    Pilkington was educated at Sherborne School and Trinity College, Cambridge, where he graduated in mechanical science. He spent one year at Cambridge followed by war service, which lasted until 1945. He returned to complete his degree and then joined Pilkington, the well-known glass manufacturer at St Helens' Lancashire, in 1947. Sir Alastair is not, however, related to the Pilkington family of glassmakers.
    The forming of perfectly flat glass that retained its fire finish had eluded glassmakers for centuries. Until the 1950s the only way of making really flat glass was to form plate glass by continuous casting between steel rollers. This destroyed the fire finish, which had to be restored by expensive grinding and polishing. The process entailed the loss of 20 per cent of good glass. The idea of floating glass on molten metal occurred to Sir Alastair in October 1952, and thereafter he remained in charge of development until commercial success had been achieved. The idea of floating molten glass on molten tin had been patented in the United States as early as 1902, but had never been pursued. The Pilkington process in essence was to float a ribbon of molten glass on a bath of molten tin in an inert atmosphere of nitrogen, to prevent oxidation of the tin. It was patented in Britain in 1957 and in the USA two years later. The first production glass issued from the plant in May 1957, although the first good glass did not appear until July 1958. The process was publicly announced the following year and was quickly taken up by the industry. It is now the universal method for manufacturing high quality flat glass.
    Having seen through the greatest single advance in glassmaking and one of the most important technological developments this century, Sir Alastair became Chairman of Pilkingtons until 1980 and President thereafter.
    [br]
    Principal Honours and Distinctions
    Knighted 1970. FRS 1969. Honorary Fellow of Trinity College, Cambridge, 1991.
    Bibliography
    1969, "Float glass process—the review lecture", Royal Society (13 February). 1975, "Floating windows", Proceedings of the Royal Institution, Vol. 48.
    1976, "Float glass—evolution and revolution over 60 years", Glass Technology, Vol. 17, no. 5.
    1963, "The development of float glass", Glass Industry, (February).
    Further Reading
    J.Jewkes et al., 1969, The Sources of Invention, 2nd ed., London: Macmillan.
    LRD

    Biographical history of technology > Pilkington, Sir Lionel Alexander Bethune (Alastair)

  • 6 Atwood, George

    SUBJECT AREA: Ports and shipping
    [br]
    b. 1746 England
    d. July 1807 London, England
    [br]
    English mathematician author of a theory on ship stability.
    [br]
    Atwood was educated at Westminster School and entered Trinity College, Cambridge, in 1765 with a scholarship. He graduated with high honours (third wrangler) in 1796, and went on to become a fellow and tutor of his college. In 1776 he was elected Fellow of the Royal Society. Eight years later, William Pitt the Younger (1759–1806) appointed him a senior officer of the Customs, this being a means of reimbursing him for the arduous and continuing task of calculating the national revenue. As a lecturer he was greatly renowned and his abilities as a calculator and as a musician were of a high order.
    In the late 1790s Atwood presented a paper to the Royal Society that showed a means of obtaining the righting lever on a ship inclined from the vertical; this was a major step forward in the study of ship stability. Among his other inventions was a machine to exhibit the accelerative force of gravity.
    [br]
    Principal Honours and Distinctions
    FRS 1776.
    Further Reading
    A.M.Robb, 1952, Theory of Naval Architecture, London: Charles Griffin (for a succinct description of the various factors in ship stability, and the importance of Atwood's contribution).
    FMW

    Biographical history of technology > Atwood, George

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