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121 criterion
критерий, показатель; условие; признакairworthiness criterionattitude criterionbuckling criterionbuffet criterionconvergence criterioncreep-rupture criterioncumulative damage criteriondamage tolerance criteriondeparture criteriondeparture prediction criterionderating criteriondesign criterionempirical criterionestimation criterionfail-safe criterionfailure criterionflight path criterionflying qualities criterionfracture criterionfrequency domain criterionfrequency response criteriong-tolerance criterionGriffith's criterionhandling qualities criterionhigh-angle-of-attack criterionicing criterionidentification criterionLighthill's criterionlight-loss criterionload factor response criterionlongitudinal criterionLyapunov criterionmaneuvering criterionmission-oriented criterionNeal-Smith criterionNyquist criterionopen-loop criterionoptimality criterionparametric criterionperformance criterionpilot-centered criterionpitch sensitivity criterionpredictive criterionrecovery criterionrough runway criterionRouth-Hurwitz criterionSchuler criterionsecond tier criterionseparation criterionshort period criterionsmoothness criterionstability criterionstrength criterionTau criteriontracking criteriontransition criterionTresca`s yield criteriontrim-slope criterionvisual criterionvon Mises' yield criterionyield criterion -
122 control
управление; регулирование; контроль; орган [рычаг] управления; руль; pl. система управления или регулирования; управлять; регулироватьback seat flight control — управление ЛА из задней кабины [с места заднего лётчика]; pl. дублирующие органы управления в задней кабине
be out of control — терять управление [управляемость]; выходить из-под управления [контроля]
continuously variable thrust control — плавное [бесступенчатое] регулирование тяги
control c.g. control — регулирование центровки (ЛА)
control of missile attitude — стабилизация ракеты; управление пространственным положением ракеты
control of the air — превосходство или господство в воздухе; превосходство в области авиации [в авиационной технике]; контроль воздушного пространства
control of the yoke — разг. управление штурвалом
control of thrust orientation — управление ориентированием [направлением вектора] тяги
flight deck lighting controls — органы управления [ручки регулировки] освещением кабины экипажа
fling the controls over — перебрасывать органы управления (в противоположную сторону),
flow control with altitude compensation — регулятор расхода [подачи] с высотным корректором
fuel dump valve control — кран [рычаг крана] аварийного слива топлива
gas jet attitude control — управление пространственным положением с помощью системы газоструйных рулей
go out of control — терять управление, выходить из-под управления [контроля]
ground rollout rudder steering control — управление пробегом [на пробеге] с помощью руля направления
interconnected fuel and propeller controls — объединённая система регулирования подачи топлива и шага винта
jet tab thrust vector control — управление вектором тяги с помощью газовых рулей; дефлекторное управление вектором тяги
jet(-deflection, -direction) control — реактивное [струйное] управление; управление изменением направления тяги; струйный руль
manual mixture shut-off control — рычаг отсечки подачи горючей смеси, рычаг останова [выключения] двигателя
maximum boundary layer control — управление пограничным слоем при наибольшей эффективности [производительности, интенсивности работы] системы
recover the control — восстанавливать управление [управляемость]
respond to the controls — реагировать [отвечать] на отклонение рулей [органов управления]
space shuttle orbiter control — управление орбитальной ступенью челночного воздушно-космического аппарата
throttle and collective pitch control — верт. рычаг «шаг — газ»
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123 установка
installation (instl)
- (агрегат, блок) — unit
- (комплекс оборудования или агрегатов, объединенный общим назначением, процесс монтажа) — installation
- (процесс и состояние установки подвижных элементов, органов управления, задатчиков н т.п. в определенное положение) — setting, selection, positioning (of controls, selectors, etc. to desired position)
- (пульт контроля управления) — set, unit
-, аварийная силовая — emergency power unit (epu)
-, автоматическая, пусковая (апу, для запуска бортовых ракет и спец. снарядов) — launcher
- аэродромной проверки и запуска, электрическая — ground power unit for servicing and starting (gpu)
- аэродромного питания — ground power unit (gpu)
- в нуль (сигнала) — (signal) zeroing
- воздушного запуска (увз) — ground pneumatic start unit
-, вспомогательная силовая (всу) — auxiliary power unit (apu)
- вспомогательная силовая установка (раздел 049) — airborne auxiliary power
бортовые силовые установки (двигатели), предназначенные для выработки электрической, гидравлической или пневматической энергии для питания систем ла. — those airborne power plants (engines) installed on the aircraft for the purpose of generating and supplying a single type or combination of auxiliary electric, hydraulic, pneumatic or other power.
всу состоит из гтд со свободной турбиной для привода эл. генератора и воздушного компрессора. — the apu consists of а turboshaft engine driving а free turbine, which in turn оperates an electric generator and air compressor.
- высотомера — altimeter setting
a pressure reading set into an altimeter to adjust for a given barometric pressure.
- высотомера пo давлению у земли (на уровне аэродрома) — qfe setting
- высотомера по давлению приведенному к уровню моря — qnh setting set the altimeter to actual qnh at transition level.
- гидродробеструйная — hydraulic shot-blast unit
- двигателя — engine installation
- (для) заправки гидросистемы — hydraulic system servicing set
- для заправки топливом в полете, подвесная — refueling pod /store/
- для зарядки кислородом — oxygen charging set
- для испытания расходомером — flowmeter test set
- для испытания тахометров — tachometer test set
- для проверки герметичности кабин — (pressurized) cabin leak test set
- для проверки гидросистемы (самолета) — aircraft hydraulic test set /rig/
- для проверки гироприборов (упг) — turn table
- для проверки пневмосистемы — pneumatic test set /rig/
- для прокачки (гироскопических приборов) — turn table
- для прокачки (жидкостных систем) — flushing unit
- домкратов (под переднюю и основную опору шасси, схема) — nose and main wheel jacking
- дробеструйная _ закрылков, автоматическая — shot-blast unit automatic flap positiong
- зарядная (заправочная) — charging set
-, измерительная — measuring set
-,испытательная (поверочная) — test set
- испытательная (стенд) "- карты ручная" (навигац. планшета) — test rig (map) man slew
-, контрольная тахометрическая (кту) — tachometer test set
-, контрольно-поверочная (комплекс, пульт, станция) — test set
- контрольно-поверочная (поворотная платформа для проверки гироскопических приборов) — turn table (to test gyroscopic instruments)
- контрольно-поверочная (стенд) — test stand /rig/
-, контрольно-поверочная (тестер) — tester
-, контрольно-поверочная (устройство) — test unit
- крепежной детали — installation of fastener
необходимо предусмотреть невозможность неправильной установки крепежной детали (болта), если ее неправильная установка может привести к опасным последствиям. — if incorrect or incomplete installation of fastener (bolt) would introduce detrimental effects, proper means must be provided to prevent incorrect installation.
-, наземная поверочная — ground test set /rig/
- (монтаж) на самолет — installation (of unit) on airplane
- на самолет (графа формуляpa двигателя) — installed on airplane
-, обезличенная (деталей) — indiscriminate installation (of parts)
never interchange the mating parts indiscriminately.
-, переносная контрольноповерочная — portable test unit, portable tester
-, поверочная (комплекс) — test set
-, поверочная (стенд) — test stand
-, поверочная (тестер) — tester
-, поверочная (устройство) — test unit
- поворотная (упг, для проверки гироскопических приборов) — turn table
-, подвесная пушечная (ппу) — gun pod (g/pod)
-, подвесная, пушечная, внешняя (внутренняя) — outboard (inboard) gun pod (outbd or inbd g/pod)
-, подвижная пушечная (гондола для установки пушки, управляемой в вертикальной плоскости) — flexible gun pod
-, пушечная — gun (installation)
- режима работы (двигателя) — power setting
при изменении режима работы двигателя, рычаг управления двигателем должен перемещаться плавно. — in changing the power setting, the power control lever must be moved gradually.
-, силовая (раздел 071) — power plant
силовая установка ла включает собственно двигатель, воздухозаборник,подвеску (крепление) двигателя, капоты, воздухозаборники систем и агрегатов, регулируемые створки капота. — the overall power package inclusive оf engine, air intake, mount, cowling, scoops, cowl flaps.
-, силовая (двигатель) — power unit
-, силовая (группа двигателей) — power unit
система, состоящая из одного или нескольких двигателей, узлов и агрегатов, обеспечивающая тягу независимо от др. силовых установок, но не включающая устройств для кратковременного увеличения тяги. — power unit is а system of one or more engin which are together necessary to provide thrust, independently of other power unit(s), but not including short period thrust producing devices.
-, силовая (параграф разд. "ограничения" рлэ) — power plant
в данном разделе указываются ограничения, обуславливающие безопасность эксплуатации двигателя, возд. винтов и агрегатов силовой установки ла. — the limitations to ensure the safe operation of the engine, propellers, and power plant accessories as installed in the airplane should be given.
- силовой установки — power plant installation
the complete installation forming a power plant.
- синусоидальных колебаний, двухстепенная (для проверки гироскопов) — turn table
-, случайная (непригодных деталей) — inadvertent return to service
на крепежные детали, имеющие износ и непригодные к дальнейшей эксплуатации, но no внешнему виду кажущиеся исправными, должны наноситься четкие метки, чтобы нe допустить их случайной установки. — fasteners determined to be worn and inairworthy but which give appearance of suitability for installation should be marked conspicuously to prevent their inadvertent return to service.
- с питанием от сети, наземная пусковая — ground starter unit operating on mains supply
- стабилизатора, взлетная — stabilizer takeoff setting
- стабилизатора, посадочная — stabilizer landing setting
-, стрелково-пушечная, подвижная — flexible gun
- трапа (бортового) в рабочее положение — airstairs extension the airstairs extension and retraction is actuated electrically.
-, турбогенераторная (тг, вспомогательная силовая) — auxiliary power unit (apu)
-, турбонасосная (тну, гидравлический насос с воздушным приводом) — turbine-driven hydraulic pump
-, турбохолодильная (тху системы кондиционир. воздуха) — cooling turbine (turb)
-, турельная (пулеметная) — (gun) turret
-, ультразвуковая (очистительная ванна) — supersonic bath
- шага возд. винта — propeller pitch setting
-, шкворневая (для стрельбы из личного оружия десантников) — gun pivot
выбор силовой у. — selection of the power plant
дата у. (изделия) — date installed
порядок у. — installation procedure
порядок обратный у. — reverse procedure of installationРусско-английский сборник авиационно-технических терминов > установка
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124 эксплуатация
operation, service
- (техническое обслуживание) — maintenance
-, безаварийная (агрегата) — trouble-free operation
-, безаварийная (самолета), — accident-free operation
-, безопасная — safe operation
- в аварийных условиях (разд. 3 рлэ) — emergency procedures
данный раздел должен включать основные действия (экипажа) в аварийных условиях. — this section should contain essential operating procedures for emergency conditions.
под аварийными условиями понимаются возможные, но необычные условия эксплуатации ла, требующие незамедлительных и точных действий для существенного уменьшения опасности. — an emergency, in this context, is defined as a foreseeable, but unusual, situation in which immediate and precise action will substantially reduce the risk of disaster.
- в метеоусловиях категории (1, 2, 3) — operation to category (1, 2, 3) limits, category (1, 2, 3) operation
- в нормальных условиях (разд. 4 рлэ) — normal procedures
данный раздел должен включать действия экипажа в нормальных условиях эксплуатации и в случаях отказов /неисправностей, не указанных в разд. 3. — this section should contain normal procedures and those procedures in the event of malfunctioning which are not included in section 3.
- в нормальных метеоусловиях — normal weather operation
- в полете — in-flight procedures
- в сложных метеоусловиях — low weather operation
- в тропиках — operation in tropic area
- в условиях высоких температур — hot weather operation
- в условиях низких (пониженных) температур — cold weather operation in cold weather operation the generator may be slow to produce stabilized power.
-, грамотная (техническое обслуживание) — intelligent maintenance perform maintenance intelligently.
-, дальнейшая восстановить агрегат для дальнейшей эксплуатации. — further service recondition the unit for further service.
- летательных аппаратов тяжелее воздуха — aviation the operation of heavierthan-air aircraft.
-, летная — flight operation
-, наземная — ground operation
насос предназначается для наземной эксплуатации (работы) системы. — the pump is provided for the ground operation of the system
-, наземная (действия, производимые с ла на земле) — ground handling
-, нормальная — normal procedures
- по состоянию (использование в работе с контролем состояния) — on-condition use
- по состоянию, техническая — on-condition maintenance, oc maintenance
a failure preventive maintenance process.
- систем самолета — management of airplane systems
- систем самолета (раздел рлэ) — systems
- систем экипажем в полете — crew operating procedures to use systems in flight
находиться вне э. (о ла) — be inactive
в э. — in service /operation/
ввод в э. — introduction into service
(случай) возможный в э. — expected in operation /service/
дата ввода в э. — date placed in service
заметки по э. (раздел формуляра или паспорта) — notes
ненаходящийся в э. — out-of-serviee
ненаходящийся в э. (временно не эксплуатируемый) — during period of idleness
непригодный к э. — unserviceable
опыт э. — operational experience
особенности э. — peculiarities of operation
практика э. — maintenance practices
практически возможный в э. — operationally practicable
простота э. — operational simplicity
с момента ввода в э. — since placed in service
с начала э. — since placed in service
снятие с э. — withdrawal from service
удобство э. — ease of handling
условия э. — operating conditions
вводить в э. — place /put/ in service
вводиться в э. — enter service
the а/с first entered service in may 1980 with b.e.a.
допускать к дальнейшей э. — return to service
return the unit to service as serviceable.
допускать к дальнейшей э. (считать работоспособным) — consider serviceable
не находиться в э. более чем... — be out of use for more than...
признавать (считать) годным к (летной) эксплуатации — determine to be in airworthy condition, certify as airworthy
считать ла или указанные части годными к эксплуатации после переборки, ремонтa, модификации или установки. — certify that an aircraft or parts thereof comply with the current airworthiness requirements after being overhauled, repaired, modified, or installed.
снимать с э. — withdraw from serviceРусско-английский сборник авиационно-технических терминов > эксплуатация
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125 этап
stage, phase, element
- (испытательный двигателя) — run
длительные испытания двигателя состоят из нескольких этапов. — the engine endurance test consists of series of runs.
- (переход при выполнении работ) — step step-by-step instructions for accomplishing the work.
- (участок траектории) — segment, (flight) leg
- взлета, (первый, второй, третий, четвертый, рис. 114) — (first, second, etc.) segment the gradient in the first segment.
- входа в луч (глиссадного или курсового радиомаяка) — (glide-slope or localizer) beam interception phase
- выполнения работы — operation /procedure/ step
operating procedure requires breakdown of job into logical steps or operations.
- выполнения работы, основной — basic (operation) step
- выполнения работы (являющийея частью основного этапа) — detail (operation) step detail step-by-step procedure for testing and adjust
- выставки (инерциальной навигационной системы) — align stage
- горизонтального разгона по траектории начального набоpa высоты — horizontal acceleration element in takeoff flight path
- демонтажа — removal step
этап демонтажа при замене гидробака. — removal step in replacement of hydraulic reservoir.
- захвата луча (грм или крм) — (glide-slope of localizer) beam capture phase
- захода на посадку, конечный — final approach
- захода на посадку, начальный — initial approach
- захода на посадку, промежуточный — intermediate approach
- испытаний (двигателя), состоящий из минутных пeриодов (на взлетном режиме) — (engine) run consisting of alternate periods of... minutes (at takeoff power with takeoff speed)
-, контрольный (кэ, участок полета) — route check leg (cl)
- набора высоты — climb element
- начального набора высоты (первый - четвертый, рис. 114) — takeoff flight path segment
- маневра — stage /element/ or maneuver
- маршрута — route stage
- полета — stage of filght
- приемки — acceptance phase
- проверки — check phase
- работы, основной — basic operation step
основные этапы работы no замене агрегата включают: подготовку, демонтаж, монтаж, проверку, регулировку. — basic steps in replacement of unit involve: job set-up, removal, installation, test, adjustment.
- разборки — disassembly (procedure) step
- разгона (ла) — acceleration element
- режима (при испытании дв.) — (engine) power period
during the third and sixth takeoff power periods.
- сборки — assembly (procedure) step
- установки (монтажа) — installation step
- ухода на второй круг, начальный — initial stage of go-around adequate acceleration in initial stage of go-around.
- чистой траектории начальногo набора высоты, второй, первый, третий, четвертый (см. "участок") — second (first, third, fourth) segment of net takeoff flight path
прохождение э. выставки (инерциальной системы) — alignment stage progression
выполнять плавный и безопасный переход от одного — accomplish safe and smooth transition between each
э. маневра к другому — stage of maneuver
выполнять ч-л. в (два) этапа — perform smth in sequence of (2) events
разбиваться) на э. (переходы) — break down into stepsРусско-английский сборник авиационно-технических терминов > этап
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126 Leonardo da Vinci
[br]b. 15 April 1452 Vinci, near Florence, Italy,d. 2 May 1519 St Cloux, near Amboise, France.[br]Italian scientist, engineer, inventor and artist.[br]Leonardo was the illegitimate son of a Florentine lawyer. His first sixteen years were spent with the lawyer's family in the rural surroundings of Vinci, which aroused in him a lifelong love of nature and an insatiable curiosity in it. He received little formal education but extended his knowledge through private reading. That gave him only a smattering of Latin, a deficiency that was to be a hindrance throughout his active life. At sixteen he was apprenticed in the studio of Andrea del Verrochio in Florence, where he received a training not only in art but in a wide variety of crafts and technical arts.In 1482 Leonardo went to Milan, where he sought and obtained employment with Ludovico Sforza, later Duke of Milan, partly to sculpt a massive equestrian statue of Ludovico but the work never progressed beyond the full-scale model stage. He did, however, complete the painting which became known as the Virgin of the Rocks and in 1497 his greatest artistic achievement, The Last Supper, commissioned jointly by Ludovico and the friars of Santa Maria della Grazie and painted on the wall of the monastery's refectory. Leonardo was responsible for the court pageants and also devised a system of irrigation to supply water to the plains of Lombardy. In 1499 the French army entered Milan and deposed Leonardo's employer. Leonardo departed and, after a brief visit to Mantua, returned to Florence, where for a time he was employed as architect and engineer to Cesare Borgia, Duke of Romagna. Around 1504 he completed another celebrated work, the Mona Lisa.In 1506 Leonardo began his second sojourn in Milan, this time in the service of King Louis XII of France, who appointed him "painter and engineer". In 1513 Leonardo left for Rome in the company of his pupil Francesco Melzi, but his time there was unproductive and he found himself out of touch with the younger artists active there, Michelangelo above all. In 1516 he accepted with relief an invitation from King François I of France to reside at the small château of St Cloux in the royal domain of Amboise. With the pension granted by François, Leonardo lived out his remaining years in tranquility at St Cloux.Leonardo's career can hardly be regarded as a success or worthy of such a towering genius. For centuries he was known only for the handful of artistic works that he managed to complete and have survived more or less intact. His main activity remained hidden until the nineteenth and twentieth centuries, during which the contents of his notebooks were gradually revealed. It became evident that Leonardo was one of the greatest scientific investigators and inventors in the history of civilization. Throughout his working life he extended a searching curiosity over an extraordinarily wide range of subjects. The notes show careful investigation of questions of mechanical and civil engineering, such as power transmission by means of pulleys and also a form of chain belting. The notebooks record many devices, such as machines for grinding and polishing lenses, a lathe operated by treadle-crank, a rolling mill with conical rollers and a spinning machine with pinion and yard divider. Leonardo made an exhaustive study of the flight of birds, with a view to designing a flying machine, which obsessed him for many years.Leonardo recorded his observations and conclusions, together with many ingenious inventions, on thousands of pages of manuscript notes, sketches and drawings. There are occasional indications that he had in mind the publication of portions of the notes in a coherent form, but he never diverted his energy into putting them in order; instead, he went on making notes. As a result, Leonardo's impact on the development of science and technology was virtually nil. Even if his notebooks had been copied and circulated, there were daunting impediments to their understanding. Leonardo was left-handed and wrote in mirror-writing: that is, in reverse from right to left. He also used his own abbreviations and no punctuation.At his death Leonardo bequeathed his entire output of notes to his friend and companion Francesco Melzi, who kept them safe until his own death in 1570. Melzi left the collection in turn to his son Orazio, whose lack of interest in the arts and sciences resulted in a sad period of dispersal which endangered their survival, but in 1636 the bulk of them, in thirteen volumes, were assembled and donated to the Ambrosian Library in Milan. These include a large volume of notes and drawings compiled from the various portions of the notebooks and is now known as the Codex Atlanticus. There they stayed, forgotten and ignored, until 1796, when Napoleon's marauding army overran Italy and art and literary works, including the thirteen volumes of Leonardo's notebooks, were pillaged and taken to Paris. After the war in 1815, the French government agreed to return them but only the Codex Atlanticus found its way back to Milan; the rest remained in Paris. The appendix to one notebook, dealing with the flight of birds, was later regarded as of sufficient importance to stand on its own. Four small collections reached Britain at various times during the seventeenth and eighteenth centuries; of these, the volume in the Royal Collection at Windsor Castle is notable for its magnificent series of anatomical drawings. Other collections include the Codex Leicester and Codex Arundel in the British Museum in London, and the Madrid Codices in Spain.Towards the end of the nineteenth century, Leonardo's true stature as scientist, engineer and inventor began to emerge, particularly with the publication of transcriptions and translations of his notebooks. The volumes in Paris appeared in 1881–97 and the Codex Atlanticus was published in Milan between 1894 and 1904.[br]Principal Honours and Distinctions"Premier peintre, architecte et mécanicien du Roi" to King François I of France, 1516.Further ReadingE.MacCurdy, 1939, The Notebooks of Leonardo da Vinci, 2 vols, London; 2nd edn, 1956, London (the most extensive selection of the notes, with an English translation).G.Vasari (trans. G.Bull), 1965, Lives of the Artists, London: Penguin, pp. 255–271.C.Gibbs-Smith, 1978, The Inventions of Leonardo da Vinci, Oxford: Phaidon. L.H.Heydenreich, Dibner and L. Reti, 1981, Leonardo the Inventor, London: Hutchinson.I.B.Hart, 1961, The World of Leonardo da Vinci, London: Macdonald.LRD / IMcN -
127 Nobel, Alfred Bernhard
[br]b. 21 October 1833 Stockholm, Swedend. 10 December 1896 San Remo, Italy[br]Swedish industrialist, inventor of dynamite, founder of the Nobel Prizes.[br]Alfred's father, Immanuel Nobel, builder, industrialist and inventor, encouraged his sons to follow his example of inventiveness. Alfred's education was interrupted when the family moved to St Petersburg, but was continued privately and was followed by a period of travel. He thus acquired a good knowledge of chemistry and became an excellent linguist.During the Crimean War, Nobel worked for his father's firm in supplying war materials. The cancellation of agreements with the Russian Government at the end of the war bankrupted the firm, but Alfred and his brother Immanuel continued their interest in explosives, working on improved methods of making nitroglycerine. In 1863 Nobel patented his first major invention, a detonator that introduced the principle of detonation by shock, by using a small charge of nitroglycerine in a metal cap with detonating or fulminating mercury. Two years later Nobel set up the world's first nitroglycerine factory in an isolated area outside Stockholm. This led to several other plants and improved methods for making and handling the explosive. Yet Nobel remained aware of the dangers of liquid nitroglycerine, and after many experiments he was able in 1867 to take out a patent for dynamite, a safe, solid and pliable form of nitroglycerine, mixed with kieselguhr. At last, nitroglycerine, discovered by Sobrero in 1847, had been transformed into a useful explosive; Nobel began to promote a worldwide industry for its manufacture. Dynamite still had disadvantages, and Nobel continued his researches until, in 1875, he achieved blasting gelatin, a colloidal solution of nitrocellulose (gun cotton) in nitroglycerine. In many ways it proved to be the ideal explosive, more powerful than nitroglycerine alone, less sensitive to shock and resistant to moisture. It was variously called Nobel's Extra Dynamite, blasting gelatin and gelignite. It immediately went into production.Next, Nobel sought a smokeless powder for military purposes, and in 1887 he obtained a nearly smokeless blasting powder using nitroglycerine and nitrocellulose with 10 per cent camphor. Finally, a progressive, smokeless blasting powder was developed in 1896 at his San Remo laboratory.Nobel's interests went beyond explosives into other areas, such as electrochemistry, optics and biology; his patents amounted to 355 in various countries. However, it was the manufacture of explosives that made him a multimillionaire. At his death he left over £2 million, which he willed to funding awards "to those who during the preceding year, shall have conferred the greatest benefit on mankind".[br]Bibliography1875, On Modern Blasting Agents, Glasgow (his only book).Further ReadingH.Schuck et al., 1962, Nobel, the Man and His Prizes, Amsterdam.E.Bergengren, 1962, Alfred Nobel, the Man and His Work, London and New York (includes a supplement on the prizes and the Nobel institution).LRD -
128 Preece, Sir William Henry
[br]b. 15 February 1834 Bryn Helen, Gwynedd, Walesd. 6 November 1913 Penrhos, Gwynedd, Wales[br]Welsh electrical engineer who greatly furthered the development and use of wireless telegraphy and the telephone in Britain, dominating British Post Office engineering during the last two decades of the nineteenth century.[br]After education at King's College, London, in 1852 Preece entered the office of Edwin Clark with the intention of becoming a civil engineer, but graduate studies at the Royal Institution under Faraday fired his enthusiasm for things electrical. His earliest work, as connected with telegraphy and in particular its application for securing the safe working of railways; in 1853 he obtained an appointment with the Electric and National Telegraph Company. In 1856 he became Superintendent of that company's southern district, but four years later he moved to telegraph work with the London and South West Railway. From 1858 to 1862 he was also Engineer to the Channel Islands Telegraph Company. When the various telegraph companies in Britain were transferred to the State in 1870, Preece became a Divisional Engineer in the General Post Office (GPO). Promotion followed in 1877, when he was appointed Chief Electrician to the Post Office. One of the first specimens of Bell's telephone was brought to England by Preece and exhibited at the British Association meeting in 1877. From 1892 to 1899 he served as Engineer-in-Chief to the Post Office. During this time he made a number of important contributions to telegraphy, including the use of water as part of telegraph circuits across the Solent (1882) and the Bristol Channel (1888). He also discovered the existence of inductive effects between parallel wires, and with Fleming showed that a current (thermionic) flowed between the hot filament and a cold conductor in an incandescent lamp.Preece was distinguished by his administrative ability, some scientific insight, considerable engineering intuition and immense energy. He held erroneous views about telephone transmission and, not accepting the work of Oliver Heaviside, made many errors when planning trunk circuits. Prior to the successful use of Hertzian waves for wireless communication Preece carried out experiments, often on a large scale, in attempts at wireless communication by inductive methods. These became of historic interest only when the work of Maxwell and Hertz was developed by Guglielmo Marconi. It is to Preece that credit should be given for encouraging Marconi in 1896 and collaborating with him in his early experimental work on radio telegraphy.While still employed by the Post Office, Preece contributed to the development of numerous early public electricity schemes, acting as Consultant and often supervising their construction. At Worcester he was responsible for Britain's largest nineteenth-century public hydro-electric station. He received a knighthood on his retirement in 1899, after which he continued his consulting practice in association with his two sons and Major Philip Cardew. Preece contributed some 136 papers and printed lectures to scientific journals, ninety-nine during the period 1877 to 1894.[br]Principal Honours and DistinctionsCB 1894. Knighted (KCB) 1899. FRS 1881. President, Society of Telegraph Engineers, 1880. President, Institution of Electrical Engineers 1880, 1893. President, Institution of Civil Engineers 1898–9. Chairman, Royal Society of Arts 1901–2.BibliographyPreece produced numerous papers on telegraphy and telephony that were presented as Royal Institution Lectures (see Royal Institution Library of Science, 1974) or as British Association reports.1862–3, "Railway telegraphs and the application of electricity to the signaling and working of trains", Proceedings of the ICE 22:167–93.Eleven editions of Telegraphy (with J.Sivewright), London, 1870, were published by 1895.1883, "Molecular radiation in incandescent lamps", Proceedings of the Physical Society 5: 283.1885. "Molecular shadows in incandescent lamps". Proceedings of the Physical Society 7: 178.1886. "Electric induction between wires and wires", British Association Report. 1889, with J.Maier, The Telephone.1894, "Electric signalling without wires", RSA Journal.1898, "Aetheric telegraphy", Proceedings of the Institution of Electrical Engineers.Further ReadingJ.J.Fahie, 1899, History of Wireless Telegraphy 1838–1899, Edinburgh: Blackwood. E.Hawkes, 1927, Pioneers of Wireless, London: Methuen.E.C.Baker, 1976, Sir William Preece, F.R.S. Victorian Engineer Extraordinary, London (a detailed biography with an appended list of his patents, principal lectures and publications).D.G.Tucker, 1981–2, "Sir William Preece (1834–1913)", Transactions of the Newcomen Society 53:119–36 (a critical review with a summary of his consultancies).GW / KFBiographical history of technology > Preece, Sir William Henry
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