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101 Graham, George
SUBJECT AREA: Horology[br]b. c.1674 Cumberland, Englandd. 16 November 1751 London, England[br]English watch-and clockmaker who invented the cylinder escapement for watches, the first successful dead-beat escapement for clocks and the mercury compensation pendulum.[br]Graham's father died soon after his birth, so he was raised by his brother. In 1688 he was apprenticed to the London clockmaker Henry Aske, and in 1695 he gained his freedom. He was employed as a journeyman by Tompion in 1696 and later married his niece. In 1711 he formed a partnership with Tompion and effectively ran the business in Tompion's declining years; he took over the business after Tompion died in 1713. In addition to his horological interests he also made scientific instruments, specializing in those for astronomical use. As a person, he was well respected and appears to have lived up to the epithet "Honest George Graham". He befriended John Harrison when he first went to London and lent him money to further his researches at a time when they might have conflicted with his own interests.The two common forms of escapement in use in Graham's time, the anchor escapement for clocks and the verge escapement for watches, shared the same weakness: they interfered severely with the free oscillation of the pendulum and the balance, and thus adversely affected the timekeeping. Tompion's two frictional rest escapements, the dead-beat for clocks and the horizontal for watches, had provided a partial solution by eliminating recoil (the momentary reversal of the motion of the timepiece), but they had not been successful in practice. Around 1720 Graham produced his own much improved version of the dead-beat escapement which became a standard feature of regulator clocks, at least in Britain, until its supremacy was challenged at the end of the nineteenth century by the superior accuracy of the Riefler clock. Another feature of the regulator clock owed to Graham was the mercury compensation pendulum, which he invented in 1722 and published four years later. The bob of this pendulum contained mercury, the surface of which rose or fell with changes in temperature, compensating for the concomitant variation in the length of the pendulum rod. Graham devised his mercury pendulum after he had failed to achieve compensation by means of the difference in expansion between various metals. He then turned his attention to improving Tompion's horizontal escapement, and by 1725 the cylinder escapement existed in what was virtually its final form. From the following year he fitted this escapement to all his watches, and it was also used extensively by London makers for their precision watches. It proved to be somewhat lacking in durability, but this problem was overcome later in the century by using a ruby cylinder, notably by Abraham Louis Breguet. It was revived, in a cheaper form, by the Swiss and the French in the nineteenth century and was produced in vast quantities.[br]Principal Honours and DistinctionsFRS 1720. Master of the Clockmakers' Company 1722.BibliographyGraham contributed many papers to the Philosophical Transactions of the Royal Society, in particular "A contrivance to avoid the irregularities in a clock's motion occasion'd by the action of heat and cold upon the rod of the pendulum" (1726) 34:40–4.Further ReadingBritten's Watch \& Clock Maker's Handbook Dictionary and Guide, 1978, rev. Richard Good, 16th edn, London, pp. 81, 84, 232 (for a technical description of the dead-beat and cylinder escapements and the mercury compensation pendulum).A.J.Turner, 1972, "The introduction of the dead-beat escapement: a new document", Antiquarian Horology 8:71.E.A.Battison, 1972, biography, Biographical Dictionary of Science, ed. C.C.Gillespie, Vol. V, New York, 490–2 (contains a résumé of Graham's non-horological activities).DV -
102 Guillaume, Charles-Edouard
[br]b. 15 February 1861 Fleurier, Switzerlandd. 13 June 1938 Sèvres, France[br]Swiss physicist who developed two alloys, "invar" and "elinvar", used for the temperature compensation of clocks and watches.[br]Guillaume came from a family of clock-and watchmakers. He was educated at the Gymnasium in Neuchâtel and at Zurich Polytechnic, from which he received his doctorate in 1883 for a thesis on electrolytic capacitors. In the same year he joined the International Bureau of Weights and Measures at Sèvres in France, where he was to spend the rest of his working life. He retired as Director in 1936. At the bureau he was involved in distributing the national standards of the metre to countries subscribing to the General Conference on Weights and Measures that had been held in 1889. This made him aware of the crucial effect of thermal expansion on the lengths of the standards and he was prompted to look for alternative materials that would be less costly than the platinum alloys which had been used. While studying nickel steels he made the surprising discovery that the thermal expansion of certain alloy compositions was less than that of the constituent metals. This led to the development of a steel containing about 36 per cent nickel that had a very low thermal coefficient of expansion. This alloy was subsequently named "invar", an abbreviation of invariable. It was well known that changes in temperature affected the timekeeping of clocks by altering the length of the pendulum, and various attempts had been made to overcome this defect, most notably the mercury-compensated pendulum of Graham and the gridiron pendulum of Harrison. However, an invar pendulum offered a simpler and more effective method of temperature compensation and was used almost exclusively for pendulum clocks of the highest precision.Changes in temperature can also affect the timekeeping of watches and chronometers, but this is due mainly to changes in the elasticity or stiffness of the balance spring rather than to changes in the size of the balance itself. To compensate for this effect Guillaume developed another more complex nickel alloy, "elinvar" (elasticity invariable), whose elasticity remained almost constant with changes in temperature. This had two practical consequences: the construction of watches could be simplified (by using monometallic balances) and more accurate chronometers could be made.[br]Principal Honours and DistinctionsNobel Prize for Physics 1920. Corresponding member of the Académie des Sciences. Grand Officier de la Légion d'honneur 1937. Physical Society Duddell Medal 1928. British Horological Institute Gold Medal 1930.Bibliography1897, "Sur la dilation des aciers au nickel", Comptes rendus hebdomadaires des séances de l'Académie des sciences 124:176.1903, "Variations du module d"élasticité des aciers au nickel', Comptes rendushebdomadaires des séances de l'Académie des sciences 136:498."Les aciers au nickel et leurs applications à l'horlogerie", in J.Grossmann, Horlogerie théorique, Paris, Vol. II, pp. 361–414 (describes the application of invar and elinvar to horology).Sir Richard Glazebrook (ed.), 1923 "Invar and Elinvar", Dictionary of Applied Physics, 5 vols, London, Vol. V, pp. 320–7 (a succinct account in English).Further ReadingR.M.Hawthorne, 1989, Nobel Prize Winners, Physics, 1901–1937, ed. F.N.Magill, Pasadena, Salem Press, pp. 244–51.See also: Le Roy, PierreDVBiographical history of technology > Guillaume, Charles-Edouard
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103 Owen, Robert
SUBJECT AREA: Textiles[br]b. 14 May 1771 Newtown, Montgomeryshire, Walesd. 17 November 1858 Newtown, Montgomeryshire, Wales[br]Welsh cotton spinner and social reformer.[br]Robert Owen's father was also called Robert and was a saddler, ironmonger and postmaster of Newtown in Montgomeryshire. Robert, the younger, injured his digestion as a child by drinking some scalding hot "flummery", which affected him for the rest of his life. He developed a passion for reading and through this visited London when he was 10 years old. He started work as a pedlar for someone in Stamford and then went to a haberdasher's shop on old London Bridge in London. Although he found the work there too hard, he stayed in the same type of employment when he moved to Manchester.In Manchester Owen soon set up a partnership for making bonnet frames, employing forty workers, but he sold the business and bought a spinning machine. This led him in 1790 into another partnership, with James M'Connel and John Kennedy in a spinning mill, but he moved once again to become Manager of Peter Drink-water's mill. These were all involved in fine spinning, and Drinkwater employed 500 people in one of the best mills in the city. In spite of his youth, Owen claims in his autobiography (1857) that he mastered the job within six weeks and soon improved the spinning. This mill was one of the first to use Sea Island cotton from the West Indies. To have managed such an enterprise so well Owen must have had both managerial and technical ability. Through his spinning connections Owen visited Glasgow, where he met both David Dale and his daughter Anne Caroline, whom he married in 1799. It was this connection which brought him to Dale's New Lanark mills, which he persuaded Dale to sell to a Manchester consortium for £60,000. Owen took over the management of the mills on 1 January 1800. Although he had tried to carry out social reforms in the manner of working at Manchester, it was at New Lanark that Owen acquired fame for the way in which he improved both working and living conditions for the 1,500-strong workforce. He started by seeing that adequate food and groceries were available in that remote site and then built both the school and the New Institution for the Formation of Character, which opened in January 1816. To the pauper children from the Glasgow and Edinburgh slums he gave a good education, while he tried to help the rest of the workforce through activities at the Institution. The "silent monitors" hanging on the textile machines, showing the performance of their operatives, are famous, and many came to see his social experiments. Owen was soon to buy out his original partners for £84,000.Among his social reforms were his efforts to limit child labour in mills, resulting in the Factory Act of 1819. He attempted to establish an ideal community in the USA, to which he sailed in 1824. He was to return to his village of "Harmony" twice more, but broke his connection in 1828. The following year he finally withdrew from New Lanark, where some of his social reforms had been abandoned.[br]Bibliography1857, The Life of Robert Owen, Written by Himself, London.Further ReadingG.D.H.Cole, 1965, Life of Robert Owen (biography).J.Butt (ed.), 1971, Robert Owen, Prince of Cotton Spinners, Newton Abbot; S.Pollard and J.Salt (eds), 1971, Robert Owen, Prophet of the Poor. Essays in Honour of theTwo-Hundredth Anniversary of His Birth, London (both describe Owen's work at New Lanark).RLH -
104 disused military site
заброшенная военная площадка
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disused military site
Military site where all activity has ceased. Such areas, being extremely well sheltered against outside disturbances and in many ways less affected by human landuse than many other open landscapes, can contain significant natural habitats and rare or endangered wildlife. Abandoned military territories constitute an important source of natural landscapes to be managed and restored in an environmentally sound way. (Source: RRDA / DOBRIS)
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Англо-русский словарь нормативно-технической терминологии > disused military site
См. также в других словарях:
well-affected — adj. * * * … Universalium
well-affected — | ̷ ̷ ̷ ̷| ̷ ̷ ̷ ̷ adjective : favorably disposed or inclined (as toward a person or a political authority) … Useful english dictionary
Well — Well, adv. [Compar. and superl. wanting, the deficiency being supplied by better and best, from another root.] [OE. wel, AS. wel; akin to OS., OFries., & D. wel, G. wohl, OHG. wola, wela, Icel. & Dan. vel, Sw. v[ a]l, Goth. wa[ i]la; originally… … The Collaborative International Dictionary of English
Well enough — Well Well, adv. [Compar. and superl. wanting, the deficiency being supplied by better and best, from another root.] [OE. wel, AS. wel; akin to OS., OFries., & D. wel, G. wohl, OHG. wola, wela, Icel. & Dan. vel, Sw. v[ a]l, Goth. wa[ i]la;… … The Collaborative International Dictionary of English
Well off — Well Well, adv. [Compar. and superl. wanting, the deficiency being supplied by better and best, from another root.] [OE. wel, AS. wel; akin to OS., OFries., & D. wel, G. wohl, OHG. wola, wela, Icel. & Dan. vel, Sw. v[ a]l, Goth. wa[ i]la;… … The Collaborative International Dictionary of English
Well to do — Well Well, adv. [Compar. and superl. wanting, the deficiency being supplied by better and best, from another root.] [OE. wel, AS. wel; akin to OS., OFries., & D. wel, G. wohl, OHG. wola, wela, Icel. & Dan. vel, Sw. v[ a]l, Goth. wa[ i]la;… … The Collaborative International Dictionary of English
Well to live — Well Well, adv. [Compar. and superl. wanting, the deficiency being supplied by better and best, from another root.] [OE. wel, AS. wel; akin to OS., OFries., & D. wel, G. wohl, OHG. wola, wela, Icel. & Dan. vel, Sw. v[ a]l, Goth. wa[ i]la;… … The Collaborative International Dictionary of English
affected — affected1 /euh fek tid/, adj. 1. acted upon; influenced. 2. influenced in a harmful way; impaired, harmed, or attacked, as by climate or disease. 3. (of the mind or feelings) impressed; moved; touched: She was deeply affected by their generosity … Universalium
affected — I. /əˈfɛktəd / (say uh fektuhd) adjective 1. acted upon; influenced: the affected group. 2. influenced injuriously; impaired; attacked, as by climate, disease or pollution, etc.: *It only takes a small quantity of oil to create a mammoth… …
well — 1. adv., adj., & int. adv. (better, best) 1 in a satisfactory way (you have worked well). 2 in the right way (well said; you did well to tell me). 3 with some talent or distinction (plays the piano well). 4 in a kind way (treated me well). 5… … Useful english dictionary
affected — adjective Date: 1587 1. inclined, disposed < was well affected toward her > 2. a. given to or marked by affectation < spoke in an affected manner > b. assumed artificially or falsely ; pret … New Collegiate Dictionary
