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john+mercer

  • 1 Mercer, John

    SUBJECT AREA: Textiles
    [br]
    b. 21 February 1791 Great Harwood, Lancashire, England
    d. 30 November 1866 Oakenshaw, Lancashire, England
    [br]
    English pioneer in textile chemistry.
    [br]
    Mercer began work at the age of 9 as a bobbinwinder and then a hand-loom weaver. He had no formal education in chemistry but taught himself and revealed remarkable ability in both theoretical and applied aspects of the subject. He became the acknowledged "father of textile chemistry" and the Royal Society elected him Fellow in 1850. His name is remembered in connection with the lustrous "mercerized" cotton which, although not developed commercially until 1890, arose from his discovery, c. 1844, of the effect of caustic soda on cotton linters. He also discovered that cotton could be dissolved in a solution of copper oxide in ammonia, a phenomenon later exploited in the manufacture of artificial silk. As a youth, Mercer experimented at home with dyeing processes and soon acquired sufficient skill to set up as an independent dyer. Most of his working life was, however, spent with the calico-printing firm of Oakenshaw Print Works in which he eventually became a partner, and it was there that most of his experimental work was done. The association was a very appropriate one, for it was a member of this firm's staff who first recognized Mercer's potential talent and took the trouble in his spare time to teach him reading, writing and arithmetic. Mercer developed manganese-bronze colours and researched into catalysis and the ferrocyanides. Among his innovations was the chlorination of wool in order to make it print as easily as cotton. It was many years later that it was realized that this treatment also conferred valuable shrink-resisting qualities. Becoming interested in photochemistry, he devised processes for photographic printing on fabric. Queen Victoria was presented with a handkerchief printed in this way when she visited the Great Exhibition of 1851, of which Mercer was a juror. A photograph of Mercer himself on cloth is preserved in the Museum of Science and Industry in Manchester. He presented papers to the British Association and was a member of the Chemical Society.
    [br]
    Principal Honours and Distinctions
    FRS 1850.
    Further Reading
    Obituary, Manchester Memoirs, Manchester Literary and Philosophical Society.
    Dictionary of National Biography.
    E.A.Parnell, 1886. The Life and Labours of John Mercer, F.R.S., London (biography). 1867, biography, Journal of the Chemical Society.
    A.E.Musson and E.Robinson, 1969, Science and Technology in the Industrial Revolution, Manchester (includes a brief reference to Mercer's work).
    RLH

    Biographical history of technology > Mercer, John

  • 2 Mercer

    m.
    Mercer, John Mercer.

    Spanish-English dictionary > Mercer

  • 3 Arnold, John

    SUBJECT AREA: Horology
    [br]
    b. 1735/6 Bodmin (?), Cornwall, England
    d. 25 August 1799 Eltham, London, England
    [br]
    English clock, watch, and chronometer maker who invented the isochronous helical balance spring and an improved form of detached detent escapement.
    [br]
    John Arnold was apprenticed to his father, a watchmaker, and then worked as an itinerant journeyman in the Low Countries and, later, in England. He settled in London in 1762 and rapidly established his reputation at Court by presenting George III with a miniature repeating watch mounted in a ring. He later abandoned the security of the Court for a more precarious living developing his chronometers, with some financial assistance from the Board of Longitude. Symbolically, in 1771 he moved from the vicinity of the Court at St James's to John Adam Street, which was close to the premises of the Royal Society for the Encouragement of Arts, Manufactures \& Commerce.
    By the time Arnold became interested in chronometry, Harrison had already demonstrated that longitude could be determined by means of a timekeeper, and the need was for a simpler instrument that could be sold at an affordable price for universal use at sea. Le Roy had shown that it was possible to dispense with a remontoire by using a detached escapement with an isochronous balance; Arnold was obviously thinking along the same lines, although he may not have been aware of Le Roy's work. By 1772 Arnold had developed his detached escapement, a pivoted detent which was quite different from that used on the European continent, and three years later he took out a patent for a compensation balance and a helical balance spring (Arnold used the spring in torsion and not in tension as Harrison had done). His compensation balance was similar in principle to that described by Le Roy and used riveted bimetallic strips to alter the radius of gyration of the balance by moving small weights radially. Although the helical balance spring was not completely isochronous it was a great improvement on the spiral spring, and in a later patent (1782) he showed how it could be made more truly isochronous by shaping the ends. In this form it was used universally in marine chronometers.
    Although Arnold's chronometers performed well, their long-term stability was less satisfactory because of the deterioration of the oil on the pivot of the detent. In his patent of 1782 he eliminated this defect by replacing the pivot with a spring, producing the spring detent escapement. This was also done independendy at about the same time by Berthoud and Earnshaw, although Earnshaw claimed vehemently that Arnold had plagiarized his work. Ironically it was Earnshaw's design that was finally adopted, although he had merely replaced Arnold's pivoted detent with a spring, while Arnold had completely redesigned the escapement. Earnshaw also improved the compensation balance by fusing the steel to the brass to form the bimetallic element, and it was in this form that it began to be used universally for chronometers and high-grade watches.
    As a result of the efforts of Arnold and Earnshaw, the marine chronometer emerged in what was essentially its final form by the end of the eighteenth century. The standardization of the design in England enabled it to be produced economically; whereas Larcum Kendall was paid £500 to copy Harrison's fourth timekeeper, Arnold was able to sell his chronometers for less than one-fifth of that amount. This combination of price and quality led to Britain's domination of the chronometer market during the nineteenth century.
    [br]
    Bibliography
    30 December 1775, "Timekeepers", British patent no. 1,113.
    2 May 1782, "A new escapement, and also a balance to compensate the effects arising from heat and cold in pocket chronometers, and for incurving the ends of the helical spring…", British patent no. 1,382.
    Further Reading
    R.T.Gould, 1923, The Marine Chronometer: Its History and Development, London; reprinted 1960, Holland Press (provides an overview).
    V.Mercer, 1972, John Arnold \& Son Chronometer Makers 1726–1843, London.
    DV

    Biographical history of technology > Arnold, John

  • 4 mercerisage

    m. (du nom de John Mercer) техн. мерсеризиране ( придавам на памучната прежда лъскавина).

    Dictionnaire français-bulgare > mercerisage

  • 5 merceriser

    v.tr. (angl. de mercerize, du nom de John Mercer) техн. мерсеризирам ( придаване лъскавина на плат чрез обработка с алкален разтвор).

    Dictionnaire français-bulgare > merceriser

  • 6 Textiles

    [br]
    Dore, Samuel Griswold
    Heilmann, Josué
    Levers, John
    Lister, Samuel Cunliffe
    Ma Jun
    Song Yingxing

    Biographical history of technology > Textiles

  • 7 come home

    (come (get, go, hit или strike) home)
    1) попасть в цель (об ударе и т. п.); см. тж. get home

    Mendosa: "...If the nails fail, puncture their tires with a bullet... the nails have gone home. Their tire is down: they stop." (B. Shaw, ‘Man and Superman’, act III) — Мендоса: "...Если гвозди не помогут, вы продырявьте им шины пулей... Нет! Гвозди сделали свое дело: камера лопнула, они останавливаются."

    He lounged forward, but his blow did not get home. (E. Wallace, ‘Captains of Souls’, ch. XLIV) — Мистер Ист рванулся вперед, хотел ударить, но промахнулся.

    2) (to smb.) попасть в цель, в точку, не в бровь, а в глаз; задеть за живое, больно задеть кого-л.; найти отклик в (чьей-л.) душе; растрогать кого-л

    ...it is a pathetic sight when a score of rough Irish... get to this song; and you may see by their falling tears, how it strikes home to them. (R. L. Stevenson, ‘The Master of Ballantrae’, ch. IV) —...это было трогательное зрелище, когда группа грубых ирландцев... запела эту песню; по их слезам видно было, что песня берет их за душу.

    All the while Hurstwood was endeavouring to formulate his plea in such a way that it could strike home and bring her into sympathy with him. (Th. Dreiser, ‘Sister Carrie’, ch. XXVIII) — А Герствуд тем временем старался взывать к ее сердцу в таких словах, которые могли бы найти у Керри отклик и пробудить в ней сочувствие к нему.

    Broadbent (hugely self-satisfied): "I think I've done the trick this time. I just gave them a bit of straight talk; and it went home." (B. Shaw, ‘John Bull's Other Island’, act III) — Бродбент (очень доволен собой): "Кажется, я задел их за живое. Поговорил с ними по душам и попал в самую точку."

    3) (to smb.) доходить до (чьего-л.) сознания, производить впечатление на кого-л.; осознавать; см. тж. get home

    Mercer's words, so unusual for a Christmas evening broadcast, were as sobering as an ice-cold shower. As his words struck home, Anna Nelson's house became shrouded in churchlike stillness. (D. Carter, ‘Fatherless Sons’, part I, ch. 15) — Слова Мерсера, столь необычные для рождественской передачи, подействовали на всех отрезвляюще, будто ледяной душ. Когда смысл его слов дошел до всех, в доме Анны Нельсон воцарилась мертвая тишина, торжественная, как в церкви.

    For the first time it came home sharply to Aileen how much his affairs meant to him. (Th. Dreiser, ‘The Financier’, ch. XXXIX) — Эйлин впервые с такой отчетливостью осознала, как много значили для Каупервуда его дела.

    Large English-Russian phrasebook > come home

  • 8 Grimthorpe (of Grimthorpe), Edmund Beckett, Baron

    SUBJECT AREA: Horology
    [br]
    b. 12 May 1816 Newark, Nottinghamshire, England
    d. 29 April 1905 St Albans, Hertfordshire, England
    [br]
    English lawyer and amateur horologist who was the first successfully to apply the gravity escapement to public clocks.
    [br]
    Born Edmund Beckett Denison, he was educated at Eton and Trinity College, Cambridge, where he studied mathematics, graduating in 1838. He was called to the Bar in 1841 and became a Queen's Counsel in 1854. He built up a large and lucrative practice which gave him the independence to pursue his many interests outside law. His interest in horology may have been stimulated by a friend and fellow lawyer, J.M. Bloxham, who interestingly had invented a gravity escapement with an affinity to the escapement eventually used by Denison. Denison studied horology with his usual thoroughness and by 1850 he had published his Rudimentary Treatise on Clock and Watchmaking. It was natural, therefore, that he should have been invited to be a referee when a disagreement arose over the design of the clock for the new Houses of Parliament. Typically, he interpreted his brief very liberally and designed the clock himself. The most distinctive feature of the clock, in its final form, was the incorporation of a gravity escapement. A gravity escapement was particularly desirable in a public clock as it enabled the pendulum to receive a constant impulse (and thus swing with a constant amplitude), despite the variable forces that might be exerted by the wind on the exposed hands. The excellent performance of the prestigious clock at Westminster made Denison's form of gravity escapement de rigueur for large mechanical public clocks produced in Britain and in many other countries. In 1874 he inherited his father's baronetcy, dropping the Denison name, but later adopted the name Grimthorpe when he was created a Baron in 1886.
    [br]
    Principal Honours and Distinctions
    Peerage 1886. President, British Horological Institute 1868–1905.
    Bibliography
    His highly idiosyncratic A Rudimentary Treatise on Clocks and Watchmaking first published in 1850, went through eight editions, with slight changes of title, and became the most influential work in English on the subject of public clocks.
    Further Reading
    Vaudrey Mercer, 1977, The Life and Letters of Edward John Dent, London, pp. 650–1 (provides biographical information relating to horology; also contains a reliable account of Denison's involvement with the clock at Westminster).
    A.L.Rawlings, 1948, The Science of Clocks and Watcher, repub. 1974, pp. 98–102 (provides a technical assessment of Denison's escapement).
    DV

    Biographical history of technology > Grimthorpe (of Grimthorpe), Edmund Beckett, Baron

См. также в других словарях:

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  • John Mercer Brooke — John M. Brooke John Mercer Brooke (* 18. Dezember 1826 in Tampa, Florida; † 14. Dezember 1906 in Lexington, Virginia) war ein Ausbilder der amerikanischen Marine, Akteur im Amerikanischen Bürgerkrieg und Erfinder von …   Deutsch Wikipedia

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