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material+method

  • 101 константа

    ж. constant

    константа взаимодействия — coupling constant; force constant

    константа типа C; символьная константа — C-type constant

    Русско-английский большой базовый словарь > константа

  • 102 порошковый

    1. powder-like
    2. powder
    3. powdered

    Русско-английский большой базовый словарь > порошковый

  • 103 Blanket-Stitch Seam

    A method of joining two edges of material in an open seam by means of a single-purl buttonhole stitch, three stitches being taken on one side and then three on the opposite.

    Dictionary of the English textile terms > Blanket-Stitch Seam

  • 104 Coffering

    A method of crimping and shaping material by means of stamping, pressure and heat. Employed in making millinery trimmings, goffered slik, etc.

    Dictionary of the English textile terms > Coffering

  • 105 Honeycombing

    A method of arranging fullness similar to smocking, but diamond-shaped in structure and having each stitch run through two flutes of material rather than one.

    Dictionary of the English textile terms > Honeycombing

  • 106 Mark-Stitching

    A method of marking seam lines in material.

    Dictionary of the English textile terms > Mark-Stitching

  • 107 Mitering

    A method of joining two pieces of material, such as lace, insertion, embroidery, or finishing a hem, at an equally divided angle, as a corner.

    Dictionary of the English textile terms > Mitering

  • 108 Plated Hosiery

    A system of knitting two yarns together in the same stitch of which one thread is arranged to lie behind the other in the fabric, this being usually done to produce fabrics of greater strength and higher wearing power. It is a method adopted to enable a more costly material to appear on the face, with a sub-stratum of a cheaper yarn.

    Dictionary of the English textile terms > Plated Hosiery

  • 109 Preparation Yarn

    Coarse yarns spun from the waste of the spinner and used as warp for cheap cotton suitings, towels, sheetings, sponge cloth, etc. Its chief characteristic is strength, so it is generally used for warp yarns. The method of spinning diners from that for condenser yarns. As with the condenser system there are two kinds of preparation spinning. The hard waste section includes cop waste, reelers', winders', doublers', ring waste, etc. The soft waste section produces yarns from comber waste, strips, blowings, fly, droppings, etc. The machinery used in the average hard waste mill comprises cop bottom breakers, scutchers, breaker cards, Derby doublers, finisher cards, roving frames, mule or ring frames. The manipulation of the material is the same as for condenser spinning up to and including the Derby doubler. The laps from the Derby doubler are fed to the finisher card in the usual way. As the web reaches the doffer it is divided into four, five, or sometimes six slivers. Each sliver is then drawn through a " trumpet" by rollers, and thence through a coiler into a can (see waste)

    Dictionary of the English textile terms > Preparation Yarn

  • 110 Silver Cloth

    A dress material of French manufacture made of special yarns, composed of 80 per cent of wool and 20 per cent of vegetable silk, or Asclepios cotton. Mostly plain weave. A silver cloth was patented in 1934 after considerable research. The method finally covered by patent was to immerse the cloth in a solution of silver nitrate and follow this treatment by precipitation of the silver in the fibres by means of sodium carbonate. The resulting silver cloth actually contains about 9 per cent of silver and has a decided brown colour due to the silver oxide.

    Dictionary of the English textile terms > Silver Cloth

  • 111 Luso-Tropicalism

       An anthropological and sociol ogical theory or complex of ideas allegedly showing a process of civilization relating to the significance of Portuguese activity in the tropics of Africa, Asia, and the Americas since 1415. As a theory and method of social science analysis, Luso-Tropicalism is a 20th-century phenomenon that has both academic and political (foreign and colonial policy) relevance. While the theory was based in part on French concepts of the "science of tropicology" in anthropology, it was Gilberto Freyre, an eminent Brazilian sociologist-anthropologist, who developed Luso-Tropicalism as an academic theory of the unique qualities of the Portuguese style of imperial activity in the tropics. In lectures, articles, and books during the period 1930-60, Freyre coined the term Luso-Tropicalism to describe Portuguese civilization in the tropics and to claim that the Portuguese, more than any other European colonizing people, successfully adapted their civilization to the tropics.
       From 1960 on, the academic theory was co-opted to lend credence to Portugal's colonial policy and determination to continue colonial rule in her large, remaining African empire. Freyre's Luso-Tropicalism theme was featured in the elaborate Fifth Centenary of the Death of Prince Henry the Navigator celebrations held in Lisbon in 1960 and in a massive series of publications produced in the 1960s to defend Portugal's policies in its empire, the first to be established and the last to decolonize in the Third World. Freyre's academic theory and his international prestige as a scholar who had put the sociology of Brazil on the world map were eagerly adopted and adapted by the Estado Novo. A major thesis of this interesting but somewhat disorganized mass of material was that the Portuguese were less racist and prejudiced toward the tropical peoples they encountered than were other Europeans.
       As African wars of insurgency began in Portugal's empire during 1961-64, and as the United Nations put pressures on Portugal, Luso-Tropicalism was tested and contested not only in academia and the press, but in international politics and diplomacy. Following the decolonization of Portugal's empire during 1974 and 1975 (although Macau remained the last colony to the late 1990s), debate over the notion of Luso-Tropicalism died down. With the onset of the 500-year anniversary celebrations of the Portuguese Age of Discoveries and Exploration, beginning in 1988, however, a whiff of the essence of Luso- Tropicalism reappeared in selected aspects of the commemorative literature.

    Historical dictionary of Portugal > Luso-Tropicalism

  • 112 работа


    work
    (выполняемая человеком или совершаемая машиной) — instructions for accomplishing the work.
    указания no выполнению работ(ы). содержание работы, тепловая энергия горячего воздуха, подаваемого в турбохолодильник, преобразуется в работу, вызывая охлажние воздуха на выходе из tх — description of work. h energy passing through the cooling turbine is converted into work, thus causing a temperature drop across the turbine.
    - (нагруженного элемента конструкции) — stress carrying
    "-" (надпись у выключателя противопожарной системы) — (fire) agent arm
    - (обрабатываемая заготовка или деталь) тиски применяются для зажима обрабатываемого материала или работы. — job. vices are used to grip firmly the material or job upon which work is being done.
    "-" (положение рычага останова двигателя) — run, fuel on, open
    "-" (режим работы навигационной инерциальной системы) — navigate (nav) mode. set the ins mode selector switch to nav position.
    - (фунхционирование, действие, операция) — operation, action
    данная глава содержит щие сведения о принципе работы насоса. — this chapter contains general information on principle of the pump operation.
    - абсу в штурвальном рожиме — afcs operation under manual control
    -, автоматическая — automatic operation
    -, автоматическая (двигателя после нар) — (engine) governed run
    - агрегата — unit operation
    -, безотказная (бееперебой — trouble-free operation
    -, бесшумная — noise-free operation
    - в автоматическом режиме — automatic operation
    - (выполняемая) в заводских условиях или в мастерских — shop work
    инструкции по ремонту составлены для механизмов, выполняющих работу в стационарных мастерских, а не дпя механиков-эксплуатационников. — the overhaul instructions are prepared for mechanic who normally performs shop work and not for the aircraft service mechanic.
    -, внерегламентная — unscheduled maintenance check
    -, внеочередная регламентная — unscheduled maintenance check
    - в ручном режиме — manual operation
    - выполняемая при нахождении самолета вне эксплуатации сроком до (одного) mесяца — maintenance of aircraft during an inaction period of (one) month
    -, выполняемая своими силами (на своих базах) — work accomplished "in house"
    работа, выполняется своими силами, вместо того, чтобы выполнять эту работу силами изготовителя. — work accomplished in house versus "return to vendor" philosophy.
    - генераторов, непараллельная — unparalleled operation of generators
    - генераторов, непараллельная (табло) — unparalleled generators: generators unparalleled (gen unparl'd)
    - генераторов, параллельная — paralleled operation of generators, generators operating paral leled
    - генераторов, параллельная (табло) — paralleled generators, generators paralleled (gen parl'd)
    - генераторов, раздельная (в отличие от параллельной) — independent operation of generators
    - двигателя — engine operation /running/
    работа двигателя во всем диапазоне эксплуатационных (полетных) режимов, — the engine operation throughout the flight power range.
    - двигателя (этап) — engine run
    30-часовой этап работы двигателя на чередующихся режимах: взлетном и мпр. — 30-hour run (of engine) consisting of alternate periods at takeoff power and at maximum cruising power.
    -, заключительная — conclusive operation
    - летчика (нагрузка) — pilot work load
    наличие автоматического включения реверса тяги облегчает работу летчика при посадке, — installation of automatic thrust reversal control reduces pilot work load during landing.
    - на большом газе (двиг.) — engine run /operation/ at full throttle
    - на валу — shaft work
    - на взлетном режиме (двиг.) — (engine) operation at takeoff power, takeoff power operation
    -, надежная — reliable /dependable/ operation
    - на завышенных оборотах (двиг.) (этап испытаний) — overspeed run
    работа двигателя на завыщенных оборотах должна чередоваться с работой на стабилизирующих режимах. — the overspeed runs must be alternated with stabilizing runs.
    - на максимальном продолжительном режиме (мпр) (двиг.) — engine operation at maximum continuous power
    - на малом газе (двиг.) — (engine) operation at idle power, idling
    работа на возможно малых оборотах, не приводящая к останову двигателя, — engine running at lowest speed possible, without stopping.
    - на малых оборотах (двиг.) — engine low speed operation
    - на "номинальном" режиме (на mпp) (двиг.) — (engine) operation at maximum continuous power
    - (вертолета) на привязи — (helicopter) tie-down run
    -, научно-исследовательская — research work
    -, на холостом ходу (двиг.) — idling
    -, непрерывная — continuous operation
    -, неустойчивая — unstable operation
    -, осмотровая — inspection
    -, плановая (оперативная по регламенту техобслуживания) — line maintenance
    -, погрузочно-разгрузочная — cargo handling (operation)
    -, подготовительная работа по подготовке обо_ рудования к установке на ла. — preparatory procedure
    -, полезная — useful work
    - по разработке бортового оборудования ла — development work on airborne equipment
    - по техническому обслуживанию (осмотру) — inspection and maintenance work /action/
    -, профилактическая (техобслуживания) — preventive maintenance operation
    -, регламентная — scheduled maintenance action /check, inspection/
    выполнение программы надежности является лучшим методом для обеспечения надежности работы систем в периоды между регламентными работами. — the reliability program is the best method of controlling the interval between scheduled maintenance actions.
    -, регламентная (50-) часовая — (50-)hour scheduled maintenance check
    -, регламентная (50-) часовая (в летных часах) — (50-)flight hour (fh) maintenаncе cheek
    -, ремонтная (текущий ремонт) — repair work
    -, совместная — work in unison

    systems operate conjointly or in unison.
    -, с перебоями (двиг.) — rough (engine) operation
    двигатель работает с перебоями при неисправности системы зажигания или питания топливом, — an engine that is running or firing unevenly, usually due to а faulty condition in either the fuel or ignition systems.
    -, строго регламентированная — hard-time (ht) process /action/
    вид профилактической технической проверки в результате которой изделие (агрегат) должен быть снят с самолета и направлен в ремонт до истечения срока регламентных работ по данному изделию, — нт is а failure preventive primary maintenance (overhaul control) process which requires that the item be removed from the airplane and overhauled (or replaced) before exceeding the specified time (interval).
    - схемы (раздел описания работы электр. схемы системы блока и т.п.) — detailed circuit description
    -, текущая — current work
    -, типовая — routine
    - "уравновешивающая" (этап испытаний двиг.) — stabilizing run
    работа двигателя на повышенном режиме должна чередоваться е работой на уравновешивающем режиме. — overspeed runs must be alternated with stabilizing runs.
    - установившаяся — steady operation
    -, устойчивая — stable operation
    -, экспериментальная — experimental work
    .нарушение нормальной р. (агрегата системы) — malfunction
    объем р. — scope of work
    описание и р. (раздел руководства) — description and operation
    порядок выполнения р. (раздел бюллетеня) — accomplishment instructions
    при р. с (на) прибором, (самелете) — when working on indicator (airplane)
    схема р. — functional diagram
    часы р. — hours of operation
    выполнять р. — accomplish work
    выполнять р. на агрегате (работать с агрегатом) — perform work on unit
    зажимать р. в тисках — grip а job in the vice
    нарушать нормальную р. (агрегата, системы) — cause malfunction
    проводить р. на /с/... — work оп...

    Русско-английский сборник авиационно-технических терминов > работа

  • 113 сопротивление


    resistance
    (величина эл. сопротивления)
    сопротивление, которое оказывает электрическая цепь (проводник) движущимся в ней электрическим зарядам, выражается в омах. — а property of conductors which, depending on their dimensions, material, and temperature, determines the current produced by a given difference of potential. the practical unit of resistance is ohm.
    - (механическое, как мера прочности) — strength
    - (элемент, создающий электрическое сопротивление) — resistor
    устройство, включенное в эл. цепь для создания сопротивления протекающему току, сопротивления бывают постоянными и переменными. — а device connected into an electrical circuit to resist the flow of electric current in a circuit. there are two types - fixed and variable.
    -, активное (эл.) — resistance
    -, аэродинамическое — drag (d)
    -, балансировочное — trim drag
    -, буксировочное — tawing drag
    -, включенное в цепь — resistor connected in circuit
    -, волновое — wave drag
    -, выносное (эл.) — remote resistor
    -, гидравлическое — hydraulic resistance
    -, добавочное (омическое) — additional resistance
    -, дополнительное лобовое — additional drag
    -, емкостное (эл.) — capacitive reactance

    opposition offered by capacitors.
    - жидкости — resistance of fluid
    жидкость поглощает основную часть энергии амортстойки, преодолевая сопротивление жидкости, проходящей no каналам. — fluid absorbs most of impact energy of the shock strut, in overcoming resistance of fluid flowing through passages.
    - изоляции — insulation resistance
    -, индуктивное (аэродин.) — induced drag
    составляющая полного лобового сопротивления крыла, изменяющаяся в зависимости от подъемной силы. — the part of the drag associated with the lift.
    -, индуктивное (эл.) — inductive reactance
    электрическое сопротивление, обусловленное индукционностью цепи синусоидального тока. — opposition to flow of alterhating or pulsating current by the inductance of a circuit.
    -, кажущееся лобовое — apparent drag
    - коррозии — resistance to corrosion
    -, лобовое — drag (d)
    проекция полной аэродинамической силы на направление полета (потока) или составляющая этой силы, направленная против движения самолета. — а retarding force acting upon а body in motion through а fluid (air) parallel to the direction of motion of the body.
    -, магнитное — reluctance
    отношение магнитодвижущей силы к магнитному потоку. — resistance of а magnetic path to flow of magnetic lines of force.
    - материалов — strength of materials
    -, нелинейное — nonlinear resistance
    -, общее (напр., потенциометpa) — total resistance. ratio of output resistance to total resistance.
    -, омическое — ohmic resistance
    сопротивление постоянному — resistance to direct current.
    -, относительное (отношение активного сопротивления к омическому) — resistance ratio, relative resistаnce
    -, относительное, выходное — output resistance ratio
    -, переменное — variable resistor
    резистор с изменяемым cопротивлением. напр., реостат, потенциометр. — resistor, the resistance of which may be changed. (rheostat and potentiometer)
    -, переходное (эл.) — contact resistance
    - переходного контакта — contact resistance
    - поверхностного трения — surface-friction drag

    the part of the drag due to the tangential forces on the surface.
    -, подборное (регулируемое) — adjustable resistor
    -, полное (эл.) — impedance
    полное сопротивление (омическое и реактивное), создаваемое цепью при прохождении переменного тока. измеряется в омах. — the total opposition (i.e. resistance and reactance) a circult offers to a.c. flow. measured in ohms.
    -, полное лобовое — total drag
    -, постоянное (резистор) — fixed resistor
    нерегулируемый резистор, создающий заданную величину сопротивления в электрической цепи. — а resistor designed to introduce only а predetermined amount of resistance into ал electrical circuit and not adjustable.
    - при нулевой подъемной силе, лобовое — zero-lift drag
    правило площадей применяется при расчетах конструкции для получения минимального сопротивления при нулевой подъемной силе. — area rule is а method of design for obtaining minimum zero-lift drag.
    -, профильное — profile drag

    the sum of the surface-friction and form drags.
    -, развязывающее — decoupling resistor
    -, реактивное (эл.) — reactance

    opposition to ас flow.
    -, регулируемое — adjustable resistor

    the resistor which can be adjusted occasionally by the user (by means of a screw).
    - с отводом (эл.) — tapped resistor
    -, суммарное лобовое — total drag
    - трения — surface-friction drag
    -, угольное (регулятора напряжений) — carbon pile resistor
    - (лобового стекла) удару при столкновении с птицей (прочность) — bird strike resistance (of windscreen)
    -, удельное (эл.) — specific resistance

    resistance of а conductor expressed in ohms per unit length per unit area.
    - формы (аэродинамического профиля, тела) — form drag. pressure drag less induced
    -, электрическое — electric resistance

    an ohmmeter is an instrument for measuring electric resistance.
    включать с. (в эл. цепь) — connect the resistor (in circuit)
    оказывать с. (эл.) — offer opposition

    capacitive reactance is opposition offered by capacitors.

    Русско-английский сборник авиационно-технических терминов > сопротивление

  • 114 personalization

    E-com
    the process by which a Web site presents customers with selected information on their specific needs. To do this, personal information is collected on the individual user, and employed to customize the Web site for that person. Used properly, personalization is a powerful tool that allows customers to access the right content more quickly, thus saving them valuable time. Personalization is particularly useful if a Web site contains a very large quantity of material, meaning that a visitor is slow in finding the information they seek. It also requires a large number of visitors to the Web site, because personalization systems are complex and expensive to install.
         Information on the customer is usually collected in one of two ways. Either the individual is asked to fill out a personal profile, perhaps informing the organization of the type of product and service he or she is interested in, or the organization uses software that tracks the way a customer uses the Web site. For example, a customer interested in Product X last week, might receive details of an update for Product X upon their next visit to the Web site. A popular method by which such tracking is carried out is the use of cookies, which reside on an individual’s browser and collect information on that person’s Web behavior. Because it requires the collection of personal information, personalization raises key privacy policy issues.

    The ultimate business dictionary > personalization

  • 115 resource allocation

    Ops
    the process of assigning human and material resources to projects to ensure that they are used in the optimum way. Resource allocation is used in conjunction with network analysis techniques such as critical-path method. Basic data assembled for a project is displayed as a bar chart with start and finish times and resources required for each day of the project being easily identifiable. If there is a mismatch between planned resources and those available, resources can be reallocated or smoothed by manipulating start and finish times, or changing activities around. Resource allocation is usually computerized.

    The ultimate business dictionary > resource allocation

  • 116 Albert, Wilhelm August Julius

    [br]
    b. 24 January 1787 Hannover, Germany
    d. 4 July 1846 Clausthal, Harz, Germany
    [br]
    German mining official, successful applier of wire cable.
    [br]
    After studying law at the University of Göttingen, Albert turned to the mining industry and in 1806 started his career in mining administration in the Harz district, where he became Chief Inspector of mines thirty years later. His influence on the organization of the mining industry was considerable and he contributed valuable ideas for the development of mining technology. For example, he initiated experiments with Reichenbach's water-column pump in Harz when it had been working successfully in the transportation of brine in Bavaria, and he encouraged Dörell to work on his miner's elevator.
    The increasing depths of shafts in the Harz district brought problems with hoisting as the ropes became too heavy and tended to break. At the beginning of the nineteenth century, iron link chains replaced the hempen ropes which were expensive and wore out too quickly, especially in the wet conditions in the shafts. After he had experimented for six years using counterbalancing iron link chains, which broke too easily, in 1834 he conceived the idea of producing stranded cables from iron wires. Their breaking strength and flexibility depended greatly on the softness of the iron and the way of laying the strands. Albert produced the cable by attaching the wires to strings which he turned evenly; this method became known as "Albert lay". He was not the first to conceive the idea of metal cables: there exists evidence for such cables as far back as Pompeii; Leonardo da Vinci made sketches of cables made from brass wires; and in 1780 the French engineer Reignier applied iron cables for lightning conductors. The idea also developed in various other mining areas, but Albert cables were the first to gain rapidly direct common usage worldwide.
    [br]
    Bibliography
    1835, "Die Anfertigung von Treibseilen aus geflochtenem Eisendraht", Karstens Archiv 8: 418–28.
    Further Reading
    K.Karmarsch, "W.A.J.Albert", Allgemeine deutsche Biographie 1:212–3.
    W.Bornhardt, 1934, W.A.J.Albert und die Erfindung der Eisendrahtseile, Berlin (a detailed description of his inventions, based on source material).
    C.Bartels, 1992, Vom frühneuzeitlichen Montangewerbe zur Bergbauindustrie, Bochum: Deut sches Bergbau-Museum (evaluates his achievements within the framework of technological development in the Harz mining industry).
    WK

    Biographical history of technology > Albert, Wilhelm August Julius

  • 117 Boulsover, Thomas

    [br]
    b. 1704
    d. 1788
    [br]
    English cutler, metalworker and inventor of Sheffield plate.
    [br]
    Boulsover, originally a small-scale manufacturer of cutlery, is believed to have specialized in making knife-handle components. About 1742 he found that a thin sheet of silver could be fused to copper sheet by rolling or beating to flatten it. Thus he developed the plating of silver, later called Sheffield plate.
    The method when perfected consisted of copper sheet overlaid by thin sheet silver being annealed by red heat. Protected by iron sheeting, the copper and silver were rolled together, becoming fused to a single plate capable of undergoing further manufacturing processes. Later developments included methods of edging the fused sheets and the placing of silver sheet on both lower and upper surfaces of copper, to produce high-quality silver plate, in much demand by the latter part of the century. Boulsover himself is said to have produced only small articles such as buttons and snuff boxes from this material, which by 1758 was being exploited more commercially by Joseph Hancock in Sheffield making candlesticks, hot-water pots and coffee pots. Matthew Boulton introduced its manufacture in very high-quality products during the 1760s to Birmingham, where the technique was widely adopted later. By the 1770s Boulsover was engaged in rolling his plated copper for industry elsewhere, also trading in iron and purchasing blister steel which he converted by the Huntsman process to crucible steel. Blister steel was converted on his behalf to shear steel by forging. He is thought to have also been responsible for improving this product further, introducing "double-shear steel", by repeating the forging and faggoting of shear steel bars. Thomas Boulsover had become a Sheffield entrepreneur, well known for his numerous skills with metals.
    [br]
    Further Reading
    H.W.Dickinson, 1937, Matthew Boulton, Cambridge: Cambridge University Press (describes Boulsover's innovation and further development of Sheffield plate).
    J.Holland, 1834, Manufactures in Metal III, 354–8.
    For activities in steel see: K.C.Barraclough, 1991, "Steel in the Industrial Revolution", in J.Day and R.F.Tylecote (eds), The Industrial Revolution in Metals, The Institute of Metals.
    JD

    Biographical history of technology > Boulsover, Thomas

  • 118 Girard, Philippe de

    SUBJECT AREA: Textiles
    [br]
    b. 1775 France
    d. 1845
    [br]
    French developer of a successful flax-heckling machine for the preparation of fibres for power-spinning.
    [br]
    Early drawing and spinning processes failed to give linen yarn the requisite fineness and homogeneity. In 1810 Napoleon offered a prize of a million francs for a successful flax-spinning machine as part of his policy of stimulating the French textile industries. Spurred on by this offer, Girard suggested three improvements. He was too late to win the prize, but his ideas were patented in England in 1814, although not under his own name. He proposed that the fibres should be soaked in a very hot alkaline solution both before drawing and immediately before they went to the spindles. The actual drawing was to be done by passing the dried material through combs or gills that moved alternately; gill drawing was taken up in England in 1816. His method of wet spinning was never a commercial success, but his processes were adopted in part and developed in Britain and spread to Austria, Poland and France, for his ideas were essentially good and produced a superior product. The successful power-spinning of linen thread from flax depended primarily upon the initial processes of heckling and drawing. The heckling of the bundles or stricks of flax, so as to separate the long fibres of "line" from the shorter ones of "tow", was extremely difficult to mechanize, for each strick had to be combed on both sides in turn and then in the reverse direction. It was to this problem that Girard next turned his attention, inventing a successful machine in 1832 that subsequently was improved in England. The strick was placed between two vertical sheets of combs that moved opposite to each other, depositing the tow upon a revolving cylinder covered with a brush at the bottom of the machine, while the holder from which the strick was suspended moved up and down so as to help the teeth to penetrate deeper into the flax. The tow was removed from the cylinder at the bottom of the machine and taken away to be spun like cotton. The long line fibres were removed from the top of the machine and required further processing if the yarn was to be uniform.
    When N.L.Sadi Carnot's book Réflexions sur la puissance motrice du feu, was published in 1824, Girard made a favourable report on it.
    [br]
    Further Reading
    M.Daumas (ed.), 1968, Histoire générale des techniques, Vol. III: L'Expansion du
    Machinisme, Paris.
    C.Singer (ed.), 1958, A History of'Technology, Vol. IV, Oxford: Clarendon Press. T.K.Derry and T.I.Williams, 1960, A Short History of Technology from the Earliest
    Times to AD 1900, Oxford.
    W.A.McCutcheon, 1966–7, "Water power in the North of Ireland", Transactions of the Newcomen Society 39 (discusses the spinning of flax and mentions Girard).
    RLH

    Biographical history of technology > Girard, Philippe de

  • 119 Greathead, James Henry

    [br]
    b. 6 August 1844 Grahamstown, Cape Colony (now South Africa)
    d. 21 October 1896 Streatham, London, England
    [br]
    British civil engineer, inventor of the Greathead tunnelling shield.
    [br]
    Greathead came to England in 1859 to complete his education. In 1864 he began a three-year pupillage with the civil engineer Peter W. Barlow, after which he was engaged as an assistant engineer on the extension of the Midland Railway from Bedford to London. In 1869 he was entrusted with the construction of the Tower Subway under the River Thames; this was carried out using a cylindrical wrought-iron shield which was forced forward by six large screws as material was excavated in front of it. This work was completed the same year. In 1870 he set himself up as a consulting engineer, and from 1873 he was Resident Engineer on the Hammersmith and Richmond extensions of the Metropolitan District Railway. He assisted in the preparation of several other railway projects including the Regent's Canal Railway in 1880, the Dagenham Dock and the Metropolitan Outer Circle Railways in 1881, a new line from London to Eastbourne and a number of Irish light railways. He worked on a bill for the City and South London Railway, which was built between 1886 and 1890; here compressed air was used to prevent the inrush of water, a method for tunnelling which was generally adopted from then on. He invented apparatus for the application of water to excavate in front of the shield as well as for injecting cement-grout behind the lining of the tunnel.
    He was joint engineer with Sir Douglas Fox for the construction of the Liverpool Overhead Railway, and held the same post with W.R.Galbraith on the Waterloo and City Railway; he was also associated with Sir John Fowler and Sir Benjamin Baker in the construction of the Central London Railway. He died, aged 52, before the completion of some of these projects.
    [br]
    Further Reading
    Obituary, 1896, Proceedings of the Institution of Mechanical Engineers.
    O.Green, 1987, The London Underground: An Illustrated History', London: Ian Allan (in association with the London Transport Museum).
    P.P.Holman, 1990, The Amazing Electric Tube: A History of the City and South London
    Railway, London: London Transport Museum.
    IMcN

    Biographical history of technology > Greathead, James Henry

  • 120 Lippman, Gabriel

    [br]
    b. 16 August 1845 Hallerick, Luxembourg
    d. 14 July 1921 at sea, in the North Atlantic
    [br]
    French physicist who developed interference colour photography.
    [br]
    Born of French parents, Lippman's work began with a distinguished career in classics, philosophy, mathematics and physics at the Ecole Normale in Luxembourg. After further studies in physics at Heidelberg University, he returned to France and the Sorbonne, where he was in 1886 appointed Director of Physics. He was a leading pioneer in France of research into electricity, optics, heat and other branches of physics.
    In 1886 he conceived the idea of recording the existence of standing waves in light when it is reflected back on itself, by photographing the colours so produced. This required the production of a photographic emulsion that was effectively grainless: the individual silver halide crystals had to be smaller than the shortest wavelength of light to be recorded. Lippman succeeded in this and in 1891 demonstrated his process. A glass plate was coated with a grainless emulsion and held in a special plate-holder, glass towards the lens. The back of the holder was filled with mercury, which provided a perfect reflector when in contact with the emulsion. The standing waves produced during the exposure formed laminae in the emulsion, with the number of laminae being determined by the wavelength of the incoming light at each point on the image. When the processed plate was viewed under the correct lighting conditions, a theoretically exact reproduction of the colours of the original subject could be seen. However, the Lippman process remained a beautiful scientific demonstration only, since the ultra-fine-grain emulsion was very slow, requiring exposure times of over 10,000 times that of conventional negative material. Any method of increasing the speed of the emulsion also increased the grain size and destroyed the conditions required for the process to work.
    [br]
    Principal Honours and Distinctions
    Royal Photographic Society Progress Medal 1897. Nobel Prize (for his work in interference colour photography) 1908.
    Further Reading
    J.S.Friedman, 1944, History of Colour Photography, Boston.
    Brian Coe, 1978, Colour Photography: The First Hundred Years, London. Gert Koshofer, 1981, Farbfotografie, Vol. I, Munich.
    BC

    Biographical history of technology > Lippman, Gabriel

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