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21 стойкое повреждение
1) Engineering: stable failure, sustained fault2) Oil: sustained failure3) Aviation medicine: permanent damageУниверсальный русско-английский словарь > стойкое повреждение
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22 duradero
adj.durable, permanent, abiding, long-lasting.* * *► adjetivo1 durable, lasting* * *(f. - duradera)adj.durable, lasting* * *ADJ [ropa, tela] hard-wearing; [paz, efecto] lasting; [relación] lasting, long-term antes de s* * *- ra adjetivo <amistad/recuerdo> lasting (before n); <ropa/zapatos> hardwearing, longwearing (AmE)* * *= durable, sustained, lasting, enduring, everlasting, long-lasting, serviceable, abiding, enduringly + Adjetivo, long-lived, hard-wearing.Ex. The slips are cheaper, but less durable than cards.Ex. Research has shown that strong centralized control of employees is not the best way to achieve operational efficiency or sustained productivity.Ex. Only as his experience grew did this young man see that what he did was littered as much, if not more, with failure as it was crowned with success of a lasting kind.Ex. Archives are set of non-current archival documents preserved, with or without selection, by those responsible for their creation or by their successors for their own use or by other organizations because of their enduring value.Ex. Appraisal is the single most important function performed by an archivist because it has wide-reaching and everlasting social implications.Ex. By means of this method copies are long-lasting and do not fade.Ex. Plain calico makes a serviceable book cover but it looks better when it is coloured.Ex. The revision and correction of reference works is an abiding concern to the librarian and the user.Ex. Thus we need money, intellectual property agreements, and library collaborations to build the massive and accessible collections of enduringly valuable cultural resources that I am proposing.Ex. The author proposes a number of suggestions that could improve the market and solve some of its long-lived problems.Ex. The manufacturers of this type of artificial turf say that while the grass is soft and springy underfoot it is extremely tough and hard-wearing.----* amor duradero = lasting love.* bienes duraderos = durable goods.* consecuencia duradera = long-lasting effect.* efecto duradero = lasting effect, long-lasting effect.* impacto duradero = lasting impact.* impresión duradera = lasting impression.* más duradero = longer-lasting.* papel duradero = durable paper.* * *- ra adjetivo <amistad/recuerdo> lasting (before n); <ropa/zapatos> hardwearing, longwearing (AmE)* * *= durable, sustained, lasting, enduring, everlasting, long-lasting, serviceable, abiding, enduringly + Adjetivo, long-lived, hard-wearing.Ex: The slips are cheaper, but less durable than cards.
Ex: Research has shown that strong centralized control of employees is not the best way to achieve operational efficiency or sustained productivity.Ex: Only as his experience grew did this young man see that what he did was littered as much, if not more, with failure as it was crowned with success of a lasting kind.Ex: Archives are set of non-current archival documents preserved, with or without selection, by those responsible for their creation or by their successors for their own use or by other organizations because of their enduring value.Ex: Appraisal is the single most important function performed by an archivist because it has wide-reaching and everlasting social implications.Ex: By means of this method copies are long-lasting and do not fade.Ex: Plain calico makes a serviceable book cover but it looks better when it is coloured.Ex: The revision and correction of reference works is an abiding concern to the librarian and the user.Ex: Thus we need money, intellectual property agreements, and library collaborations to build the massive and accessible collections of enduringly valuable cultural resources that I am proposing.Ex: The author proposes a number of suggestions that could improve the market and solve some of its long-lived problems.Ex: The manufacturers of this type of artificial turf say that while the grass is soft and springy underfoot it is extremely tough and hard-wearing.* amor duradero = lasting love.* bienes duraderos = durable goods.* consecuencia duradera = long-lasting effect.* efecto duradero = lasting effect, long-lasting effect.* impacto duradero = lasting impact.* impresión duradera = lasting impression.* más duradero = longer-lasting.* papel duradero = durable paper.* * *duradero -ra* * *
duradero
‹ropa/zapatos› hardwearing, longwearing (AmE)
duradero,-a adjetivo durable, lasting
' duradero' also found in these entries:
Spanish:
duradera
- resistente
- secular
- agudeza
- agudo
English:
continued
- durable
- enduring
- hardwearing
- lasting
- long-lasting
- serviceable
- long
* * *duradero, -a adj1. [que permanece] lasting;es una vacuna de efecto duradero it is a long-acting vaccine2. [ropa, zapatos] hard-wearing* * ** * *duradero, -ra adj: durable, lasting* * *duradero adj lasting -
23 блок
unit, block;
- (агрегат) — unit
- (ролик, тросовый) — pulley
- (такелажный, погрузочный) — pulley block
- а, д, е (бытовых приборов) — unit а, d, е
- аварийных и предупреждающих сигналов (бап) — warning/caution signal unit
- автоматики (ба, инерц. сист.) — automatic control unit
- автоматического триммирования (бат), автотриммирования — autotrim control unit
-, антенно-электронный — antenna/electronic unit
- баланса (электрического баланса, системы сп-50) — balance control unit
-, балансировки (бб) — stable platform gyro bias drift
дпя компенсации систематической составляющей собственного дрейфа гироскопов гироплатформы по трем осям. — compensator
- ввода начальных данных (пв, инерциальной системы) — control display unit (cdu)
- воздушных параметров (бвп) — air data unit
-, "врубной" — plug-in unit
- bcmb (системы cbc, вычислитепь скорости, чиспа м и высоты) — air data computer
-, вычислительно-усилительный (вуб, инерциальной системы) — computer-amplifier unit
- гиромагнитной коррекции (бгмк) — gyro/mag monitor
-, гидравлический — hydraulic unit (pack)
- датчиков угловых скоростей — rate gyro unit /group/
- демпфирующих гироскопов — rate gyro unit
- дистанционной (дискретной) коррекции (бдк) — navigation computer correction selector
задатчик, устанавливаемый на приборной доске и служащий для компенсации систематической погрешности курсовой системы или цепи счисления пути в нав. вычислитепь (нву) (рис. 69). — selector is installed on сopilot's instrument panel, and is used to compensate systematic errors оf compass system or а/с position reckoning circuit in navigation computer.
- добавочного сопротивления (для ограничения токов в цепи якоря электродвигателя.) — additional resistance unit
- заданной информации по траектории полета — flight path data storage unit (fdsu)
- задатчика скорости (приборной) — ias selector unit
- задающий (в сист. управления) — master unit
- зажигания — ignition unit
-, законченный — definite-purpose unit
- защиты двигателя (бзд) — engine protection unit
- защиты и управления (бзу) — protection and control unit
-, инерциально-навигационный (с гироплатформой) — inertial navigation unit (inu)
- искрогашения (рад.) — spark quench unit
-, исполнительный — actuating unit
- камеры сгорания — combustion section
- кислородного питания, переносной — portable oxygen unit
- кислородного питания (бкп), переносной (аварийный баллон с редуктором и манометром) — (emergency) portable /walkaround/ oxygen cylinder
- кислородного питания (бкп), стационарный — oxygen supply cylinder (unit)
- кислородного оборудования (бко состоит из укладочного блока и кислородной маски) — oxygen unit
- коммутации — switching unit
- коммутации навигационного оборудования (бкн) — navigation equipment switching unit
- коммутации шин (автомат переключения шин) — bus tie relay (unit)
-, конструктивно-законченный — definite-purpose unit
- контроля — monitor
- контроля (переносного типа "тестер") — tester
- контроля исправности (системы) — (system) integrity monitor /monitoring unit/
- контроля кренов (бкк) (сравнивает углы крена и тангажа, индицируемые на обоих пкп и измеряемые резервной курсовертикалью, и при необходимости вырабатывает сигнал отказа.) — attitude monitor (атт mntr)
- коррекции и связи (бкс, инерциальной навигационной системы) — coupler
- кресел (пассажирских) — seat unit
- кресел, двухместный — double-place seat unit
- кресел, трехместный — triple-place seat unit
-, легкосъемный (со штырьевым разъемом) — plug-and-socket quick release unit
- масляных насосов (маслоагрегат) — oil pump block
-, модульный — module
- на твердых схемах (электронный) — solid state circuitry unit (all-solid state circuitry is used in many key chassis areas.)
- наведения (бн) — guidance unit
в системе сау для управления механизмом триммерного эффекта продольного канала. — directs an aircraft with referеncе 'to selection of a flight path.
-, натяжной (для регулирования натяжения тросовой проводки) — cable tensioning pulley
-, натяжной (оттяжной, тросовой проводки) — idle pulley block
- неуправляемых ракет (подвесной) — rocket pod
- ограничения режимов (автопилота, бор) — mode limiter
- опасной высоты (автопилота,бов) — preselected radio altitude unit
- оперативной памяти (устройство) — random-access memory (ram) ram output data is transferred on the memory bus.
- (иммитации) отказов (системы сау) — failure simulator
- отключения генератора (бог) — generator cut-out unit
-, оттяжной (тросовой проводки) — idle pulley block
- очередности (очереди работы озу) — queue control block (а block that is used to regulate the sequential use of a programmer.)
- памяти (внешней) — storage unit
- памяти воздушных сигналов — air data storage unit
- передачи данных — data transmitter
-, перекидной (роликовый) — guide pulley block
- переключения потребителей (бпп) — load monitor relay (unit) (lmr)
- переключения шин (автомат) — bus tie relay unit (btr)
- перекрестных связей (бпс) — cross-coupling unit
- питания — power unit
- питания потребителей (бпп) — power unit
- пластин (аккумулятора), отрицательный — negative plate group
- пластин (аккумулятора), положительный — positive plate group
-, погрузочный (тросовой проводки с лебедкой) — (cargo) loading /handling/ pulley block
- подрыва (сро) — destructor (unit)
- подшипника, внутренний — bearing inner race and cage assembly
-, полностью собранный на транзисторах — all-transistorized unit
- полупроводниковых приборов(бпп) — semiconductor module
- постоянной памяти (устройство) — read-only memory (rom) rom output data is transferred on the memory bus.
- постоянной памяти (внешнее устройство) — permanent storage
- преобразования (системы свс) — converter
- преобразования сигналов (системы мсрп) — signal conditioning unit
- приема данных — data receiver
- приема и обработки сигналов (навигац.системы "омега") — receiver-processor unit (rpu)
-,приемо-вычислительный (системы "омега") — receiver processor unit (rpu)
-,приемо-процессорный (системы "омега") — receiver processor unit (rpu) contains the circuitry to process the received omega and vlf signals.
-, процессорно-вычислительный (пb, системы "омега") — receiver-processor unit (rpu)
- разовых команд (брк) — event signal unit
- распределения углов (бру, крена, курса, тангажа инерциальной системы) — pitch, roll and heading angular information distributor (used to transfer pitch, roll and heading angular information to respective systems.)
- растормаживания (блок тормоза) — brake retraction mechanism
- реактивных орудий (подвесной) — rocket pod
- регулирования частоты генератора (брч) — generator frequency control unit
- регулировочно-коммутационный (автопилота) — coupler
- речевой информации (ри) — voice warning unit (vwu)
- речевых команд (брк) — voice warding unit (vwu)
- (2-х) роликовый — (twin) pulley block
-,рулевой (рб,автопилота) — servo (unit)
- ручного триммирования — manual trim control unit
- связи — coupling unit, coupler
-, связи аналого-цифровой (ацбс) — analog-digital coupler
служит для преобразования входных данных в цифровой код и цифрового кода в выходные данные. — converts input data into digital code, and then digital code into output signals.
- связи, антенный (системы "омега") — antenna coupler (acu)
- связи низкой частоты доплеровского измерителя скорости и сноса — doppler lf coupler
- связи с антенной — antenna coupler unit
- связи с курсовой системой — compass system coupling unit /coupler/
- связи с радиолокационным оборудованием — radar coupling unit /coupler/
- сигнализации нарушения питания (снп) — power fail relay (unit)
- сигнализации предельных кренов (бспк для включения табло крен лев (прав) велик) — limit bank warn(ing) unit (to operate high l(r) bank annunciators)
- сигналов отказа (бсо) — failure signal unit
- сидений (кресел, двух-трехместный) — (double-, triple-place) seat unit
- скоростных гироскопов — rate gyro unit/group/
- собранный на транзисторах — transistorized unit
- согласования (автопилота) — synchronizer
- согласования (сарпп) — signal conditioning unit
- согласования (сист. высотноскоростных параметров) — synchronizer
- согласования курса (бск, сист. бскв) — heading synchronizer
- согласующих устройств (бсу, системы мсрп) — signal conditioning unit
- сопряжения антенн (системы омега) — antenna coupler unit (acu)
- специализированного питания (бсп, инерциональной системы) — power unit
- сравнения — comparator
- сравнения гировертикалей (бсг) — vertical gyro comparator, vg comparator
- сравнения сигналов компасов — compass signal comparator
- страниц — page block
а normal blank page within a page block (e.g. the back of a fold-out page) shall be identified as follows. pages 823/824 (ata-1oo, 1-1-1, p.2)
- страниц раздела технология обслуживания, включает: обслуживание (стр. 301-400) демонтаж/монтаж (стр. 401-500) регулировка/испытание (стр. 501-600) осмотр/проверка (стр. 601-700) очистка/окраска (стр. 701-800) 1 текущий ремонт (стр. 801-900) — maintenance practices page number blocks are as follows: servicing (pages 301-400) removal/installation (401-500) adjustment/test (501-600) inspection/check (601-700) cleaning/painting (701-800) approved repairs (801-900)
- страниц, стандартный — standard page number block
standard page number blocks to be used for the maintenance manual are as follows:
(напр. описание и работа стр. 1-1oo — description and operation, pages 1 to 100
отыскание неисправности стр. 101-200 и т.д.) — trouble shooting, pages 101-200
maintenance practices, pages 201-300 servicing pages 301-400 (ata-1oo, 2-1-1 p.2)
- суммарного измерения (топливомера (бси) — fuel quantity totalizer
- суммарной сигнализации (топливомера) (бсс) — total fuel indication unit
- (-) схема — block diagram
блок-схемы используются в описательной части руководств для общего ознакомления с работой и соединениями сложной эпектрической или электронной системы (рис. 95). — the block diagram shall be used in the descriptive portion of the manuals to simplify complex circuits to understand the system function and operation.
- (-) схема (подрисуночная надпись, напр. "блоксхема доплеровекого измерителя) — block schematic туре 72 doppler - block schematic
- топливомера (электронный) — fuel quantity unit
- тормоза (колеса) — brake unit
- траекторного управления (бту системы сту) — flight director unit, fd unit
- трансформаторно-выпрямительный — transformer-rectifier unit (tr, tru, t/r;
-, укладочный (для кислородной маски и шланга) — (oxygen mask) container
-, унифицированный (уб для pc) — rocket pod (rkt pod)
- управления — control unit
- управления и индикации (нав. сист. "омега") — control display unit (cdu)
- управления и индикации расстояния до пункта назначения и отклонения от курса — along/across track display controller
- управления сигнализацией — warning system control unit
- усилителя сервопривода крена (бус крена) — aileron servo amplifier (unit)
- усилителя сервопривода тангажа (бус тангажа) — elevator servo amplifier (unit)
- усилителей сервоприводов (бус, автопилота) — servo amplifier unit, autopilot amplifier unit
provides power outputs to drive the control surface servos.
-, усилительный (автопилота) — autopilot amplifier
-, усилительный, крена (тангажа, рыскания) — roll (pitch, yaw) channel amplifier unit
- формирования (сигналов) и контроля — signal conditioning and monitor unit
бфк, формирует сигналы h, m, vпр) и вырабат. сигналы отказа датчиков
-, функционально-законченный — definite-purpose unit
- центровки самолета (сист. топливомера) (бцс) — fuel equalizer
- цилиндров — cylinder block
соединение нескольких цилиндров в общем конструктивном узле
- цилиндров (тормоза колеса) (рис. 32) — cylinder block
силовой узел тормоза, воздействующий при подаче давления на нажимной диск, сжимающий тормозные (вращающиеся и неподвижные) диски, — the two sets of four piston and cylinder assemblies are incorporated in the torque plate of the cylinder block to provide fully dupplicated and independent application of brake.
- чередования фаз (бчф) — phase-sequence (relay) unit
- электроники (бэ, инерц. сист.) — electronic unitРусско-английский сборник авиационно-технических терминов > блок
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24 shutdown of production
Opsthe action of stopping production due to a lack of resources or components, equipment failure or installation, or industrial action by workers. Shutdown of production may also be instigated by management to reduce output. A shutdown can be a temporary measure, for example, in holiday periods, but it can also be permanent, for example, when a manufacturing company closes down after business failure. -
25 постоянный отказ
1) Engineering: permanent fault2) Telecommunications: deterioration failure -
26 узел (агрегат, блок)
assembly, unit
ряд деталей или подузлов, соединенных вместе для выполнения определенной функции. — а number of parts or subassemblies or any combination thereof joined together to perform a specific function.
- (единица скорости) морская миля (1852 м в час) — knot (к, kt) а nautical mile per hour.
- (изделие) количество деталей на изделие (графа таблицы). — assembly (assy) units per assy.
- (составная часть агрегата, блока, установки) — sub-assembly, subassembly
две или более деталей, о6разующих часть агрегата (сборки) или блока и заменяемых как одно целое, но включающее деталь (детали), подлежащие индивидуальной замене. — two оr more parts which form а portion of an assembly or а unit replaceable as а whole, but having а part or parts which are individually replaceable.
- а (обозначение на чертеже) — detail а
- (часть) агрегата — sub-assembly, assembly
the distinction between an assembly and sub-assembly is not always exact.
- баков (масляных) (блок) — oil tank assembly
два отдельных бака установлены в одном узле. — two separate tanks are housed within the tank assembly.
-, гиростабилизированный, на карданном подвесе — gyro stabilized gimbal assembly
- гироскопа — gyro assembly
- дозирующей иглы (топлива) — throttle valve assembly
-, законченный (конструктивно) — definite-purpose assembly
-, качающий — pumping unit
насос имеет два отдельных качающих узла, состоящих из блока плунжеров, вращающихся no скошенной пяте. — the pump has two independent pumping units consisting of pfunger rotating assembly working against a variable angle swash plate.
- клапана (поддержания) постоянного (пропорционального) перепада давлений (насоса-регулятора) — proportioning valve unit
- компрессора (двиг.) — compressor section
- компрессора (подраздел 72-30) — compressor section
- контроля (блока питания) — monitoring device
работа основана на сравнении контролируемых напряжений с эталонными.
- крепления — attach(ment) fitting
- крепления груза (на борту ла) — cargo tie-down fitting
- крепления двигателя — engine mounting attachment
узлы крепления двигателя и конструкция, несущая эти узлы, должны выдерживать указанные нагрузки без разрушения, поломки или остаточной деформации. — the engine mounting attachments and related structure must be able to withstand the specified loads without failure, malfunction, or permanent deformation.
- крепления закрылка — flap attach(ment) fitting
- крепления крыла — wing attachment fitting
узлы служат для крепления крыла к фюзеляжу. — the fittings on the wing used to attach the wing to the fuselage.
- крепления оси колес (к стойке шасси) — wheel axle attachment fitting
- крепления руля высоты (или направления) — elevator (or rudder) hinge /attach/ fitting
- крепления опоры шасси, (передний, задний) — (forward, aft) landing gear strut attachment fitting
- крепления страховочных строп (или троса) — safety harness (or line) attach(ment) point /receptacle/
- крепления, шарнирный — hinge fitting
- крепления элерона — aileron hinge /attach/ fitting
-, магнито-индукционный (тахометра) — magnetic-drag assembly
-, манометрический — pressure capsule assembly
-, манометрический (трубка бурдона) — bourdon tube assembly
-, мембранный — (pressure) capsule assembly
- мембранный (указателя скорости) — airspeed capsule
- навески (общий термин) — attach(ment) fitting
узлы, служащие для крепления стабилизатора, руля высоты, триммеров, обтекателей. — the fittings on the stabilizers used for attachment of stabilizers, elevators, rudder tabs, fillets/fairings.
- навески (шарнирный) (рис. 10) — hinge fitting
- навески закрылка — flap attach(ment) fitting
- навески руля высоты (направления или элерона) — elevator (rudder or aileron) hinge fitting
- навески руля направления, верхний (нижний) — rudder top (bottom) hinge fitting
- навески руля высоты (или элерона), внешний — elevator (or aileron) outboard hinge fitting
- навески руля высоты (или элерона), внутренний (корневой) — elevator (or aileron) inboard hinge fitting
- навески руля (или элерона), средний — elevator (оr aileron) center hinge fitting
- навески триммера — trim tab hinge fitting
- навески шасси — landing gear (shock strut) attachment fitting
- насоса, управляющий — pump controlling section
- ограничения (раскрутки) оборотов (насоса-регулятора) — overspeed limiting control
- основной дозирующей иглы (командно-топливного агрегата или насоса-регулятора) — throttle valve (sub-) assembly (of fuel flow control unit)
- плунжерный качающий (наcoca) — plunger rotating assembly
- поворота крыла (в горизонтальной плоскости) — wing pivot (assembly)
- подвески вооружения на пилоне — weapon-pylon base
- подвески двигателя — engine mount
каркас, поддерживающий двигатель и крепящий его к мотогондоле или пилону. — the framework which supports an engine and attach it to the nacelle or pylon.
-, поршневой (узел цилиндров тормоза колеса) — cylinder assembly
- приемника-процессора, электронный — receiver-processor electronic assembly
- прямой (завязки шнуров, тросов) — square knot
- разъема коммуникаций, унифицированный (уурк) — combined services connector
- растормаживания (тормоза колеса) — (brake) retraction mechanism
для возвращения (после снятия давления в тормозе) нажимного диска в исходное положение, т.е. для растормаживания колеса. — the brake has automatic adjustment, integral with the retraction mechanism built into each piston, movement of the piston compresses the retraction springs.
-, регулируемой подпитки (топливом гтд) — variable enrichment unit
-, рифовый (завязки строп) — reef knot
-, рычажно-кулачковый (дозир. иглы) — throttle valve cam and lever assembly
-, силовой (блок цилиндров тормоза колеса) — cylinder assembly
-, скоростной (указателя скорости) — airspeed capsule
-, страховочный (для крепления страховочного троса или ремня) — safety rоре (or belt) attach fitting /point/
-, стыковой (стыковочный) (рис. 16) — attachment fitting
-, такелажный (точка подъема) (рис. 10) — hoist point
- такелажный (деталь) — hoist fitting
- турбины — turbine section
состоит из ступеней высок. и низк. давлений, приводящих во вращение соответствующие компрессоры. — consists of hp and lp stages, each driving their own compressors through concentric shafts.
- турбины (подраздел 72 - 50) — turbine section
- турбины и реактивного сопла — turbine and exhaust section /unit/
- (-) удавка (завязки шнуров, тросов) — running knot, slip knot
- управления и блокировки реверса тяги (насоса-регулятора) — thrust reverser control and interlocking unit
- управления приемистостью (топливного насоса-регулятора) — acceleration control (unit)
-, функционально законченный — definite-purpose assembly
- цилиндров (блок тормоза колеса) — cylinder assembly
-, швартовочный (груза на борту ла) — tie-down fitting
-, швартовочный (швартовый, ла) (рис. 150) — mooring fitting
- штока амортизатора (шасси), нижний — shock strut piston lower fitting
- электро-гидравлический /электро-гидромеханический / (гидроусилителя) — electro-hydraulic unit
командные эл. сигналы подаются в электрогидравлический узел гидроусилителя (бустера), в котором они преобразуются в механическое перемещение соответствующих золотников. — autocontrol demands are signalled electrically to the electrohydraulic unit on each surface drive (hydraulic booster) which converts them to mechanical movements (of corresponding slide valves)
завязывать у. — tie a knot
развязывать у. — loose a knot
определять дефект в у. (точнo устанавливать отказавший узел) — isolate the trouble into sub-assemblyРусско-английский сборник авиационно-технических терминов > узел (агрегат, блок)
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27 Chevenard, Pierre Antoine Jean Sylvestre
SUBJECT AREA: Metallurgy[br]b. 31 December 1888 Thizy, Rhône, Franced. 15 August 1960 Fontenoy-aux-Roses, France[br]French metallurgist, inventor of the alloys Elinvar and Platinite and of the method of strengthening nickel-chromium alloys by a precipitate ofNi3Al which provided the basis of all later super-alloy development.[br]Soon after graduating from the Ecole des Mines at St-Etienne in 1910, Chevenard joined the Société de Commentry Fourchambault et Decazeville at their steelworks at Imphy, where he remained for the whole of his career. Imphy had for some years specialized in the production of nickel steels. From this venture emerged the first austenitic nickel-chromium steel, containing 6 per cent chromium and 22–4 per cent nickel and produced commercially in 1895. Most of the alloys required by Guillaume in his search for the low-expansion alloy Invar were made at Imphy. At the Imphy Research Laboratory, established in 1911, Chevenard conducted research into the development of specialized nickel-based alloys. His first success followed from an observation that some of the ferro-nickels were free from the low-temperature brittleness exhibited by conventional steels. To satisfy the technical requirements of Georges Claude, the French cryogenic pioneer, Chevenard was then able in 1912 to develop an alloy containing 55–60 per cent nickel, 1–3 per cent manganese and 0.2–0.4 per cent carbon. This was ductile down to −190°C, at which temperature carbon steel was very brittle.By 1916 Elinvar, a nickel-iron-chromium alloy with an elastic modulus that did not vary appreciably with changes in ambient temperature, had been identified. This found extensive use in horology and instrument manufacture, and even for the production of high-quality tuning forks. Another very popular alloy was Platinite, which had the same coefficient of thermal expansion as platinum and soda glass. It was used in considerable quantities by incandescent-lamp manufacturers for lead-in wires. Other materials developed by Chevenard at this stage to satisfy the requirements of the electrical industry included resistance alloys, base-metal thermocouple combinations, magnetically soft high-permeability alloys, and nickel-aluminium permanent magnet steels of very high coercivity which greatly improved the power and reliability of car magnetos. Thermostatic bimetals of all varieties soon became an important branch of manufacture at Imphy.During the remainder of his career at Imphy, Chevenard brilliantly elaborated the work on nickel-chromium-tungsten alloys to make stronger pressure vessels for the Haber and other chemical processes. Another famous alloy that he developed, ATV, contained 35 per cent nickel and 11 per cent chromium and was free from the problem of stress-induced cracking in steam that had hitherto inhibited the development of high-power steam turbines. Between 1912 and 1917, Chevenard recognized the harmful effects of traces of carbon on this type of alloy, and in the immediate postwar years he found efficient methods of scavenging the residual carbon by controlled additions of reactive metals. This led to the development of a range of stabilized austenitic stainless steels which were free from the problems of intercrystalline corrosion and weld decay that then caused so much difficulty to the manufacturers of chemical plant.Chevenard soon concluded that only the nickel-chromium system could provide a satisfactory basis for the subsequent development of high-temperature alloys. The first published reference to the strengthening of such materials by additions of aluminium and/or titanium occurs in his UK patent of 1929. This strengthening approach was adopted in the later wartime development in Britain of the Nimonic series of alloys, all of which depended for their high-temperature strength upon the precipitated compound Ni3Al.In 1936 he was studying the effect of what is now known as "thermal fatigue", which contributes to the eventual failure of both gas and steam turbines. He then published details of equipment for assessing the susceptibility of nickel-chromium alloys to this type of breakdown by a process of repeated quenching. Around this time he began to make systematic use of the thermo-gravimetrie balance for high-temperature oxidation studies.[br]Principal Honours and DistinctionsPresident, Société de Physique. Commandeur de la Légion d'honneur.Bibliography1929, Analyse dilatométrique des matériaux, with a preface be C.E.Guillaume, Paris: Dunod (still regarded as the definitive work on this subject).The Dictionary of Scientific Biography lists around thirty of his more important publications between 1914 and 1943.Further Reading"Chevenard, a great French metallurgist", 1960, Acier Fins (Spec.) 36:92–100.L.Valluz, 1961, "Notice sur les travaux de Pierre Chevenard, 1888–1960", Paris: Institut de France, Académie des Sciences.ASDBiographical history of technology > Chevenard, Pierre Antoine Jean Sylvestre
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28 Swan, Sir Joseph Wilson
[br]b. 31 October 1828 Sunderland, Englandd. 27 May 1914 Warlingham, Surrey, England[br]English chemist, inventor in Britain of the incandescent electric lamp and of photographic processes.[br]At the age of 14 Swan was apprenticed to a Sunderland firm of druggists, later joining John Mawson who had opened a pharmacy in Newcastle. While in Sunderland Swan attended lectures at the Athenaeum, at one of which W.E. Staite exhibited electric-arc and incandescent lighting. The impression made on Swan prompted him to conduct experiments that led to his demonstration of a practical working lamp in 1879. As early as 1848 he was experimenting with carbon as a lamp filament, and by 1869 he had mounted a strip of carbon in a vessel exhausted of air as completely as was then possible; however, because of residual air, the filament quickly failed.Discouraged by the cost of current from primary batteries and the difficulty of achieving a good vacuum, Swan began to devote much of his attention to photography. With Mawson's support the pharmacy was expanded to include a photographic business. Swan's interest in making permanent photographic records led him to patent the carbon process in 1864 and he discovered how to make a sensitive dry plate in place of the inconvenient wet collodian process hitherto in use. He followed this success with the invention of bromide paper, the subject of a British patent in 1879.Swan resumed his interest in electric lighting. Sprengel's invention of the mercury pump in 1865 provided Swan with the means of obtaining the high vacuum he needed to produce a satisfactory lamp. Swan adopted a technique which was to become an essential feature in vacuum physics: continuing to heat the filament during the exhaustion process allowed the removal of absorbed gases. The inventions of Gramme, Siemens and Brush provided the source of electrical power at reasonable cost needed to make the incandescent lamp of practical service. Swan exhibited his lamp at a meeting in December 1878 of the Newcastle Chemical Society and again the following year before an audience of 700 at the Newcastle Literary and Philosophical Society. Swan's failure to patent his invention immediately was a tactical error as in November 1879 Edison was granted a British patent for his original lamp, which, however, did not go into production. Parchmentized thread was used in Swan's first commercial lamps, a material soon superseded by the regenerated cellulose filament that he developed. The cellulose filament was made by extruding a solution of nitro-cellulose in acetic acid through a die under pressure into a coagulating fluid, and was used until the ultimate obsolescence of the carbon-filament lamp. Regenerated cellulose became the first synthetic fibre, the further development and exploitation of which he left to others, the patent rights for the process being sold to Courtaulds.Swan also devised a modification of Planté's secondary battery in which the active material was compressed into a cellular lead plate. This has remained the central principle of all improvements in secondary cells, greatly increasing the storage capacity for a given weight.[br]Principal Honours and DistinctionsKnighted 1904. FRS 1894. President, Institution of Electrical Engineers 1898. First President, Faraday Society 1904. Royal Society Hughes Medal 1904. Chevalier de la Légion d'Honneur 1881.Bibliography2 January 1880, British patent no. 18 (incandescent electric lamp).24 May 1881, British patent no. 2,272 (improved plates for the Planté cell).1898, "The rise and progress of the electrochemical industries", Journal of the Institution of Electrical Engineers 27:8–33 (Swan's Presidential Address to the Institution of Electrical Engineers).Further ReadingM.E.Swan and K.R.Swan, 1968, Sir Joseph Wilson Swan F.R.S., Newcastle upon Tyne (a detailed account).R.C.Chirnside, 1979, "Sir Joseph Swan and the invention of the electric lamp", IEEElectronics and Power 25:96–100 (a short, authoritative biography).GWBiographical history of technology > Swan, Sir Joseph Wilson
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