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lines+of+longitude

  • 1 longitude

    خَطّ العَرْض \ latitude: one of a set of imaginary lines round the world that are usual on maps to show how far north or south sth. is (see longitude): In northern latitudes, daylight lasts for 20 hours in the summer. parallel: an imaginary line on a map, for describing the position of anything (see latitude): The 49th parallel (of latitude) forms a border between Canada and the USA.

    Arabic-English glossary > longitude

  • 2 longitude

    خَطّ الطُّول \ longitude: one of a set of imaginary lines round the world that are drawn on maps to show how far east or west sth. is (see latitude).

    Arabic-English glossary > longitude

  • 3 południkow|y

    adj. longitudinal, meridional
    - linie południkowe lines of longitude
    - w kierunku południkowym longitudinally

    The New English-Polish, Polish-English Kościuszko foundation dictionary > południkow|y

  • 4 خط

    خَطّ \ band: a line of material that is different from the rest, esp. in colour: A red band was painted round the tin. line: a long thin mark: a pencil line; the white lines on a football field. streak: an irregular thin strip of colour: streaks of red cloud at sunset. stripe: a long narrow band of colour: a flag with green, yellow and blue stripes. trail: a track left by sb. or sth.: The storm left a trail of destruction. The police were on his trail (were following signs, in search of him). \ See Also شريط (شَرِيط)، أَثَر \ خَطّ \ graph: a line drawn on squared paper, to show the change in amount at different times or under different conditions: He drew a graph of the monthly rainfall. \ See Also رَسْم بَيَانِيّ \ خَطّ الاسْتِواء \ equator: an imaginary line around the earth, halfway between its most northern and southern points. \ خَطّ أنابِيب \ pipeline: a large pipe through which liquid or gas is carried for long distances (esp. oil from an oilfield to a port). \ خَطّ قَضيب سِكّة الحديد \ railway, railroad: a track along which trains run: The road crosses the railway (line) by a bridge. \ خَطّ كتَابة باليَد \ handwriting: sb.’s way of writing: I can’t read your handwriting. \ خَطّ مَجْرى التَّفْكير \ line: the course of an idea: a line of thought. \ خَطّ حَديدي جانِبِيّ \ siding: a short piece of railway track beside a main line (for loading goods, etc.). \ خَطّ السَّاحِل \ coastline: a line following the shape of the coast, esp. as seen from the sea. \ خَطّ سَفَر جَوِّي \ airline: air transport system for public use. \ خَطّ سِكَّة الحَديد \ line: a railway track: the main line to London; a branch line. \ خَطّ السَّمْت \ meridian: an imaginary line drawn from the top point of the earth to the bottom, used on maps to show position. \ خَطّ سَيْر \ line: a course; a direction: One road follows the line of the river; the other follows the coastline. path: the line along which sth. moves: the moon’s path round the earth. route: the way that one takes from one place to another: Which is the safest route up the mountain?. \ See Also طريق (طَرِيق)‏ \ خَطّ الطُّول \ longitude: one of a set of imaginary lines round the world that are drawn on maps to show how far east or west sth. is (see latitude). \ خَطّ العَرْض \ latitude: one of a set of imaginary lines round the world that are usual on maps to show how far north or south sth. is (see longitude): In northern latitudes, daylight lasts for 20 hours in the summer. parallel: an imaginary line on a map, for describing the position of anything (see latitude): The 49th parallel (of latitude) forms a border between Canada and the USA. \ خَطّ القِتال \ line: (in war) a row of defended positions: in the front line; behind the enemy lines. \ خَطّ قَصير (عَلامَة وَصْل) (شَرْطَة قصيرة)‏ \ hyphen: (-) that is used for joining two words, as in: blood-red. \ خَطّ قُطْري \ diagonal: (in the direction of) a straight line joining two opposite corners of a square; (of) any straight line which runs in a sloping direction: a cloth with a diagonal pattern. \ خَطّ اليَد \ script: handwriting, not printing. \ خَطّ الدَّرْز \ seam: the line where two edges of cloth or leather meet (and are sewn or stuck together): the seam of one’s trouser leg. \ خَطّ حُدود مَلْعَب (الكُرَة)‏ \ touchline: the line down each side of a football field. \ خُطوطٌ رئيسيَّة \ outline: a statement of the main facts: an outline of English history. \ خَطَأٌ \ amiss: wrong; out of order: There’s something amiss with this telephone. error: mistake. fault: sth. that is wrong; a weakness: The lights have gone out; there must be an electrical fault. mistake: an incorrect act or thought: It was a mistake to lend him money. Your English is full of mistakes. wrong: not right; unjust; against custom; against the law: It is wrong to tell lies or to steal, not correct; mistaken; unsuitable That’s the wrong answer, and the wrong way to do it. She came in the wrong clothes for riding, (a) wrong action, a crime; an injustice If you do no wrong, you will not be punished. \ أَخْطَاء (أَغلاطٌ كِتابيَّة أو مَطبعيَّة)‏ \ errata.

    Arabic-English dictionary > خط

  • 5 меридиан (рис. 126)


    meridian
    -, базовый — prime meridian, meridian (passing) through the origin axis z2 lies parallel to the meridian through the origin.
    -, базовый географический — geographic prime meridian
    -, географический (истинный) — geographical meridian
    меридиан, проходящий через географические полюса земли, — the meridians of the earth, which pass through the earth's geographical poles.
    -, гринвичский — greenwich meridian
    -, истинный (географический, си) — true meridian
    -, компасный (ск) (рис. 126) — compass meridian
    -, магнитный (см) — magnetic meridian
    меридиан, проходящий через магнитные полюса земли, — а meridian which passes through both north and south magnetic poles.
    - места (местоположения ла)position meridian
    -, местный — local meridian
    -, начальный — prime meridian
    меридиан долготы 0град. служащий началом отсчета долготы места. — the meridian of longitude 0°, used as the origin for measurement of longitude.
    -, начальный ортодромический (для определения долготы) — prime transverse meridian used to define longitude.
    начальный условныйprime grid meridian
    -, небесный (астр.) — celestial meridian

    a great circle of the celestial sphere, through the celestial pоles and zenith.
    -, нулевой — prime meridian
    -, нулевой ортодромический — prime transverse meridian
    -, опорный — reference meridian
    -, ортодромический — transverse meridian
    -, ортодромичеекий, начальный — prime transverse meridian
    -, ортодромический, нулевой — prime transverse meridian
    -, текущий — present meridian
    - точки места ла, ортодромический — transverse meridian including aircraft position
    -, условно-принятый fictious — meridian

    one of a series of great circles or lines used in place of a meridian for certain purposes.
    -, условный (cy) — grid meridian
    направление, в общем случае не совпадающее с истинным или магнитным меридианом, относительно которого в данном полете измеряется курс самолета, пеленги, путевые углы, направление ветра. условные меридианы на полетной карте параллельны друг другу. — the grid meridians are series of lines, usually straight and parallel, superimposed on a chart to serve as a directional reference for navigation.
    -, условный начальный — prime grid meridian
    относительно истинного м. — relative /referenced/ to true north

    Русско-английский сборник авиационно-технических терминов > меридиан (рис. 126)

  • 6 координаты


    coordinates
    -, астрономические — celestial /astronomic/ coordinates
    - аэродрома, географические (известные, заданные) — aerodrome reference points the designated geographical location of an aerodrome.
    -, базовые — basic coordinates, basic coordinate frames

    basic coordinate frames are used to mechanize the inertial navigator.
    - в проекции меркатораmercator coordinates
    - визирной оси телескопа (астроориентатора) (в noлe поиска)coordinates of telescope line of sight (in field of view)
    -, выведенные на индикацию — displayed coordinates
    -, географические — geographi(cal) coordinates
    координаты, определяющие местоположение точки на земле: широта (f) и долгота (l). — coordinates defining a point on the surface of the earth, usually latitude and longitude
    -, географические (местоположение ла, определяемое радиотехническими средствами, визуальным или астрономическим наблюдением). — ground /navigational/ position, fix а fix may be obtained by radio, by visual observation, by celestial (astronomical) observation.
    - геодезическиеgeodetic coordinates
    -, геоцентрические — geocentric coordinates
    -гироплатформы, центр которых связан с ла — aircraft-centered platform сoordinates
    - главноортодромическиеprimary great circle (spherical) coordinates
    - декартовыcartesian coordinates
    - жестко связанные с землейearth axes
    система взаимноперпендикулярных осей, с вертикальной осью направленной к центру земли, для определения местоположения ла. — set of mutually perpendicular axes established with the upright axis pointing to the center of the earth, used in describing the position or performance of an aircraft in flight.
    - жестко связанные с (гиро)платформой — platform coordinates, coordinates fixed with (stable) platform
    - звездыstar coordinates
    -, индицируемые — displayed coordinates
    -, инерциальные — inertial coordinates

    carious acceleration is measured in an inertial coordinate system.
    -, инерциальные, с центром связанным с центром земли — earth-centered inertial coordinates
    - истинного местоположения самолета, частноортодромические — navigation leg actual aircraft position coordinates
    -, картографические (условные) — map-grid coordinates
    - касательной (тангенциальной) плоскости — tangent plane coordinates. coordinates parallel to the locally level axes at some destination point.
    - контрольного ориентира (ко)checkpoint coordinates
    - места (местоположения) самолета (mс)aircraft position coordinates
    выраженные широтой и долготой. — expessed in latitude and longitude.
    - места (местоположения ла), ортодромические — (aircraft) position transversepole spherical coordinates
    - места самолета по широте и долготе с точностью до 1/10 градуса (или минуты) — aircraft present position coordinates in latitude and longitude to the nearest tenth of a degree (or an arc minute)
    - места самолета, текущие (tkmc) — aircraft present position coordinates, (present) position (pos, p)
    - места старта — departure /starting/ point coordinates, initial position coordinates
    - места стоянкиramp position coordinates
    - местоположения (инерциальной) системы(inertial) system position coordinates
    -, навигационные — navigation coordinates
    -, начальные — initial position coordinates
    -, начальные, нормально-ортодромические (на аэродроме в момент начала работы системы координаты места старта). — initial position normal transverse-pole spherical coordinates
    -, начальные ортодромические (хо, уо) (места самолета) — initial position transverse-pole spherical coordinates
    -, небесные (астрономические) — selestial coordinates
    -, неподвижные — fixed coordinates
    -, нормально-ортодромические — normal transverse-pole spherical coordinates
    -, обобщенные — generalized coordinates
    любая система координат, характеризующих состояние рассматриваемой системы. — any set of coordinates specifying the state of the system under consideration.
    - оборудования (снаряжения) ла (сидения, гардеробы,туалеты, плоты, жилеты, топливо в баках) — equipment/furnishings and fuel stowage coordinates
    -, ортогональные — orthogonal coordinates
    -, ортодромические (х, у) — transverse-pole (spherical) coordinates, space polar coordinates
    сферическая система координат с произвольным расположением полюса. ортодромическая широта (х) и долгота (у) - координаты точки. — coordinates analogus to geocentriс spherical coordinates except that their poles are deliberatory displaced from the geographic north and south poles.
    -, ортодромические, в проекции меркатора (равноугольной цилиндрической проекции) — transverse (-pole) mercator coordinates
    - ортодромические, прямоугольные (при счислении пути на условной плоскости земли) — transverse-pole rectangular coordinates on а flat earth, the (grid) north and (grid) east distances travelled, used for dr.
    -, относительные — relative coordinates a particle moving in a relative coordinate system.
    - полюса ортодромии (ф, l) — transverse-pole coordinates
    -, полярные — polar coordinates
    - ппм (промежуточного пункта маршрута)waypoint coordinates
    -, пространственные — space coordinates
    -, прямоугольные — rectangular coordinates
    к. с началом отсчета в центре массы земли с осью yз по оси вращения земли (рис. 111), — with origin at the mass center of tfie earth, whose yз axis lies along the earth's spin axis.
    -, прямоугольные, центр которых связан с (ла) — rectangular aircraft-centered navigation coordinates
    - равноугольной цилиндрической проекцииtransverse (-pole) mercator coordinates
    - радиостанции (широта, долгота) — radio station coordinates /locations/ (latitude, longitude)
    -, расчетные — computational coordinates a heading reference is required to resolve the velocities into the computational coordinates
    - светила, экваториальные — star equatorial coordinates
    -, связанные — body axes
    система координатных осей, жестко связанная с самолетoм. (рис. 133) — а system of coordinate axes fixed in the aircraft.
    - связанные с (гиро)платформойplatform coordinates
    -, связанные с центром земли — earth-centered /-fixed/ coordinates
    -, скоростные — wind axes
    система осей с началом координат в точке, лежащей в пределах фюзеляжа самолета и направлением, определяемым относительно набегающего потока. — а system of coordinate axes with the origin in the aircraft and the direction fixed by that of the relative airflow.
    - старта — departure /starting/ point coordinates, initial position coordinates
    -, стояночные (ла) — ramp position coordinates
    -, сферические (см. долгота (lc), широта (fс) сферические) fc - угол между плоскостью экватора и направлением на данную точку из центра земли. lc - угол между плоскостью начального меридиана и плоскостью меридиана данной точки. — spherical coordinates system of coordinates defining a point on a sphere (spheroid) by its angular distances from а primary great circle and from а reference secondary great circle, as latitude and longitude.
    -, сферические, геодезические — geodetic spherical coordinates
    сферические координаты перпендикуляра к референцэллипсоиду. — these are spherical coordinates of the normal to the reference ellipsoid.
    -, сферические, геоцентрические — geocentric spherical coordinates

    these are the spherical coordinates of the radius vector
    -, сферические, обобщенные — generalized spherical coordinates
    -, сферические, ортодромические — transverse-pole spherical coordinates
    - тангенциальной (касательной) плоскостиtangent plane coordinates
    применяются при полетах на малые расстояния (несколько сот миль) до одного пункта назначения. — useful for flight operations within а few hundred miles of а single destination.
    -, текущие (местоположение ла в данный момент) (тксм) — present position coordinates /data/
    - точки (на карте)coordinates of point
    пересечение заданных величин долготы и широты определяет координаты точки. — intersection of the latitude and longitude lines gives соordinates of the point.
    - точки старта — departure /starting/ point coordinates, coordinates of departure coordinats
    -, условные (картографические) — map-grid coordinats the navigation computer can calculate position in map-grid coordinates.
    -, усповные (на карте) — grid directions
    -, условные (ортодромические, с произвольным полюсом) — transverse-pole spherical coordinates
    -, фактические (места ла) — fix coordinates
    - цветности (напр., ано) — illumination chromaticity coordinates
    - целиtarget position (coordinates)
    -, центр которых связан с ла — aircraft /vehicle/-centered navigation coordinates
    -, цилиндрические — cylinder /cylindrical/ coordinates
    -, цилиндрические, тангенциальные — tangent cylinder coordinates cylinder is tangent to the sphere.
    -, частно-ортодромические — navigation leg waypoint coordinates

    a navigation leg is defined using waypoints coordinates inserted.
    -, экваториальные — equatorial (system) coordinates

    a set of celestial coordinates based on celestial equator as the primary great circle.
    -, экваториальные, первой и второй звезд (прямое воcхождение) — equatorial (system) coordinates of star 1 and star 2 (right ascension)
    -, экваториальные, первой и второй звезд (склонение) — equatorial (system) coordinates of star 1 and star 2 (declination)
    мои к... (широты)... (долготы) — my position is...(latitude)... (longitude).
    начало к. — origin of coordinates, zero reference point
    оси к. — coordinate axes
    оси связанной системы к. самолета — body axes
    система (осей) к. — coordinate system
    скоростная система к. — wind axes
    управление относительно трех осей к. — three-axis control
    уточнение к. (ла) — precise determination of the aircraft definite fix
    вводить к. (в навигационную систему) — enter coordinates
    вводить (правильные) к., повторно — reenter (proper) coordinates
    корректировать ткмсupdate (present) position
    корректировать координаты системыupdate the system position
    наносить к. места (на карту) — plot the position
    строить график в к. "х-у" — plot а curve on "х-у" coordinates
    уточнять к. (ла) — determine the aircraft definite fix
    уточнять (корректировать) к. места — updat position (coordinates)

    Русско-английский сборник авиационно-технических терминов > координаты

  • 7 रेखा _rēkhā

    रेखा [लिख्-अच् लस्य]
    1 A line, streak; मदरेखा, दानरेखा, रागरेखा &c.
    -2 The measure of a line, small portion, as much as a line; न रेखामात्रमपि व्यतीयुः R.1.17.
    -3 A row, range, line, series; मुदाश्रु मोक्ष्यसे क्षिप्रं मेघरेखेव वार्षिकी Rām.2.44.27.
    -4 Delineation, sketch, drawing; लावण्यरेखया किंचिदन्वितम् Ś.6.13.
    -5 The first or prime meridian of the Indian astronomers drawn from Laṅkā to Meru and passing through Ujjayinī.
    -6 Fulness, satisfaction.
    -7 Deceit, fraud.
    -8 A straight position of all limbs in dancing.
    -Comp. -अंशः a degree of longi- tude.
    -अन्तरम् distance east or west from the first meridian, longitude of a place.
    -आकार a. lineal, formed in lines, striped.
    -गणितम् geometry.
    -न्यासः the marking down of lines.
    -मात्रम् ind. even by a line.

    Sanskrit-English dictionary > रेखा _rēkhā

  • 8 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

  • 9 लम्बन


    lambana
    mfn. hanging down orᅠ causing to hang down (said of Ṡiva) MBh. ;

    m. a camp-follower, soldier's boy Hcar. ;
    phlegm, the phlegmatic humour L. ;
    N. of a son of Jyotish-mat VP. ;
    n. hanging down, depending, falling W. ;
    a partic. mode of fighting Hariv. ;
    the moon's parallax in longitude, the interval of the lines between the earth's centre andᅠ surface Sūryas. Gol.;
    a fringe L. ;
    a long necklace (depending from the neck to the navel) L. ;
    N. of a Varsha in Kuṡa-dvīpa MārkP. ;
    - लम्बनविधि

    Sanskrit-English dictionary > लम्बन

  • 10 ввод


    input
    (агрегата, блока, системы, цепи)
    кпеммы или другие точки агрегата (блока), на которые подается электрический сигнал (напряжение) или прикладываетея механическое усилие. — terminals ог other places where current, voltage, power or driving force may be applied to а circuit or device.
    - (клавиша ввода информпции, инерц. системы) — insert (1)
    "-" (клавиша ввода данных) — entry (ent)
    "-" (лампа сигнализации ввода информации в нав. сист. "омега") — enter, entry (ent)
    - антенныantenna lead-in
    проводник, соединяющий антенну c передатчиком или приемником. — the wire of other conductor connecting the antenna electrically with the transmitting and receiving equipment.
    - в эксплуатациюintroduction into service
    - гринвичского времени и даты полета — greenwich mean time/date entry
    - данных (подача сигналов на вход блока)data input
    - данных (при помощи задающего устройства) — data entry /insertion/ the data entry light illuminates during data insertion.
    - данных с помощью наборного поля — data entry /insertion/ from a keyboard
    - данных, трехступенчатый — three-step data entry

    enter (or insert) the data in a three-step process.
    - долготы (в курсовую енотему) — longitude data entry /insertion/
    - 3k (заданного курса в пнп)hdg select
    - индикации — data display entry /insertion/
    - индикации no кнопке "ввод" — data display insertion /entry/ by pressing the insert /entry/ button
    - информации в память вычислителя (клавиша пульта управления и индикации системы "омега") — enter, entry (ent)
    - исходного места самолетаinitial position entry
    - координат исходного места самолетаinitial position (coordinate) entry
    - координат ппм — waypoint coordinate entry /insertion/
    - места самолета (мс) (инерциальная система)position (pos) insertion
    - места самолета (мс) (сист. "омега") — position entry
    - начальных координат — initial position insert /insertion/
    - нового ппм — new waypoint (wpt) entry /insertion/
    - ортодромических координат — transverse (-pole) coordinate entry /insertion/
    -, ошибочный (к-л величины на наборном попе) — incorrect /illegal/ entry rotate the selector switch to cancel illegal entry
    - параметров ветра в рожимe счисления путиmanual wind entry (when) in dr mode
    - параметров, ручной — manual data insert /entry, loading/
    - парашютаparachute deployment
    выпуск купола и строп из ранца, — the withdrawal of the canopy and rigging lines from the pack.
    - парашютной системы, принудительный — parachute system static (link) deployment
    - повторный (данных при помощи клавиш) — reinsert, reentry
    - поправок в... — introduction of the correction into...
    - программы (в эвм)program input
    - разрешения неопределенности следования (заданному) маршруту, принудительный — manual initiation of lane ambiguity resolution (lar) routine
    - режима полета по условным меридианамgrid mode entry
    - текущего значения местопопожения (ла)present position entry (procedure)
    - тормозного парашютаdrag parachute deployment
    - участка маршрута (клавиша блока управления и индикации системы "омега") — leg chg (navigation leg change)
    - фактического путевого угла и путевой скорости — manual tk/gs entry
    -· широты (в курсовую систему) — latitude data entry /insertion/
    с момента в. в эксплуатацию — since first put /placed/ into service
    начинать в. данных с нулей — proceed the data with zeros
    прекращать в. данных — cancel data entry

    Русско-английский сборник авиационно-технических терминов > ввод

  • 11 Ramsden, Jesse

    [br]
    b. 6 October 1735 (?) Halifax, Yorkshire, England
    d. 5 November 1800 Brighton, Sussex, England
    [br]
    English instrument-maker who developed machines for accurately measuring angular and linear scales.
    [br]
    Jesse Ramsden was the son of an innkeeper but received a good general education: after attending the free school at Halifax, he was sent at the age of 12 to his uncle for further study, particularly in mathematics. At the age of 16 he was apprenticed to a cloth-worker in Halifax and on completion of the apprenticeship in 1755 he moved to London to work as a clerk in a cloth warehouse. In 1758 he became an apprentice in the workshop of a London mathematical instrument-maker named Burton. He quickly gained the skill, particularly in engraving, and by 1762 he was able to set up on his own account. He married in 1765 or 1766 the youngest daughter of the optician John Dollond FRS (1706– 61) and received a share of Dollond's patent for making achromatic lenses.
    Ramsden's experience and reputation increased rapidly and he was generally regarded as the leading instrument-maker of his time. He opened a shop in the Haymarket and transferred to Piccadilly in 1775. His staff increased to about sixty workers and apprentices, and by 1789 he had constructed nearly 1,000 sextants as well as theodolites, micrometers, balances, barometers, quadrants and other instruments.
    One of Ramsden's most important contributions to precision measurement was his development of machines for obtaining accurate division of angular and linear scales. For this work he received a premium from the Commissioners of the Board of Longitude, who published his descriptions of the machines. For the trigonometrical survey of Great Britain, initiated by General William Roy FRS (1726–90) and continued by the Board of Ordnance, Ramsden supplied a 3 ft (91 cm) theodolite and steel measuring chains, and was also engaged to check the glass tubes used to measure the fundamental base line.
    [br]
    Principal Honours and Distinctions
    FRS 1786; Royal Society Copley Medal 1795. Member, Imperial Academy of St Petersburg 1794. Member, Smeatonian Society of Civil Engineers 1793.
    Bibliography
    Instruments, London.
    1779, "Description of two new micrometers", Philosophical Transactions of the Royal Society 69:419–31.
    1782, "A new construction of eyeglasses for such telescopes as may be applied to mathematical instruments", Philosophical Transactions of the Royal Society 73:94–99.
    Further Reading
    R.S.Woodbury, 1961, History of the Lathe to 1850, Cleveland, Ohio; W.Steeds, 1969, A History of Machine Tools 1700–1910, Oxford (both provide a brief description of Ramsden's dividing machines).
    RTS

    Biographical history of technology > Ramsden, Jesse

  • 12 latitude

    خَطّ العَرْض \ latitude: one of a set of imaginary lines round the world that are usual on maps to show how far north or south sth. is (see longitude): In northern latitudes, daylight lasts for 20 hours in the summer. parallel: an imaginary line on a map, for describing the position of anything (see latitude): The 49th parallel (of latitude) forms a border between Canada and the USA.

    Arabic-English glossary > latitude

  • 13 parallel

    خَطّ العَرْض \ latitude: one of a set of imaginary lines round the world that are usual on maps to show how far north or south sth. is (see longitude): In northern latitudes, daylight lasts for 20 hours in the summer. parallel: an imaginary line on a map, for describing the position of anything (see latitude): The 49th parallel (of latitude) forms a border between Canada and the USA.

    Arabic-English glossary > parallel

См. также в других словарях:

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  • History of longitude — The history of longitude is a record of the effort, by navigators and scientists over several centuries, to discover a means of determining longitude. The measurement of longitude is important to both cartography and navigation. Historically, the …   Wikipedia

  • Hard lines — Line Line, n. [OE. line, AS. l[=i]ne cable, hawser, prob. from L. linea a linen thread, string, line, fr. linum flax, thread, linen, cable; but the English word was influenced by F. ligne line, from the same L. word linea. See {Linen}.] 1. A… …   The Collaborative International Dictionary of English

  • Line of lines — Line Line, n. [OE. line, AS. l[=i]ne cable, hawser, prob. from L. linea a linen thread, string, line, fr. linum flax, thread, linen, cable; but the English word was influenced by F. ligne line, from the same L. word linea. See {Linen}.] 1. A… …   The Collaborative International Dictionary of English

  • latitude and longitude — Coordinate system by which the position or location of any place on the Earth s surface can be determined and described. Latitude is a measurement of location north or south of the Equator. Lines of latitude are known as parallels, or parallels… …   Universalium

  • Circles of longitude — Circle Cir cle (s[ e]r k l), n. [OE. cercle, F. cercle, fr. L. circulus (Whence also AS. circul), dim. of circus circle, akin to Gr. kri kos, ki rkos, circle, ring. Cf. {Circus}, {Circum }.] [1913 Webster] 1. A plane figure, bounded by a single… …   The Collaborative International Dictionary of English

  • Degree of longitude — Degree De*gree , n. [F. degr[ e], OF. degret, fr. LL. degradare. See {Degrade}.] 1. A step, stair, or staircase. [Obs.] [1913 Webster] By ladders, or else by degree. Rom. of R. [1913 Webster] 2. One of a series of progressive steps upward or… …   The Collaborative International Dictionary of English

  • observed longitude — The longitude determined from observations, which results in lines of position extending in a generally north south direction …   Aviation dictionary

  • Sundial — A sundial is a device that measures time by the position of the Sun. In common designs such as the horizontal sundial, the sun casts a shadow from its style (a thin rod or a sharp, straight edge) onto a flat surface marked with lines indicating… …   Wikipedia

  • Navigation — This article is about determination of position and direction on or above the surface of the earth. For other uses, see Navigation (disambiguation). Table of geography, hydrography, and navigation, from the 1728 Cyclopaedia. Navigation is the… …   Wikipedia

  • Latitude — This article is about the geographical reference system. For other uses, see Latitude (disambiguation). Map of Earth Longitude (λ) Lines of longitude appear vertical with varying curvature in this projection, but are actually halves of great… …   Wikipedia

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