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  • 61 McNeill, Sir James McFadyen

    SUBJECT AREA: Ports and shipping
    [br]
    b. 19 August 1892 Clydebank, Scotland
    d. 24 July 1964 near Glasgow, Scotland
    [br]
    Scottish naval architect, designer of the Cunard North Atlantic Liners Queen Mary and Queen Elizabeth.
    [br]
    McNeill was born in Clydebank just outside Glasgow, and was to serve that town for most of his life. After education at Clydebank High School and then at Allan Glen's in Glasgow, in 1908 he entered the shipyard of John Brown \& Co. Ltd as an apprentice. He was encouraged to matriculate at the University of Glasgow, where he studied naval architecture under the (then) unique Glasgow system of "sandwich" training, alternately spending six months in the shipyard, followed by winter at the Faculty of Engineering. On graduating in 1915, he joined the Army and by 1918 had risen to the rank of Major in the Royal Field Artillery.
    After the First World War, McNeill returned to the shipyard and in 1928 was appointed Chief Naval Architect. In 1934 he was made a local director of the company. During the difficult period of the 1930s he was in charge of the technical work which led to the design, launching and successful completion of the great liners Queen Mary and Queen Elizabeth. Some of the most remarkable ships of the mid-twentieth century were to come from this shipyard, including the last British battleship, HMS Vanguard, and the Royal Yacht Britannia, completed in 1954. From 1948 until 1959, Sir James was Managing Director of the Clydebank part of the company and was Deputy Chairman by the time he retired in 1962. His public service was remarkable and included chairmanship of the Shipbuilding Conference and of the British Ship Research Association, and membership of the Committee of Lloyd's Register of Shipping.
    [br]
    Principal Honours and Distinctions
    Knight Commander of the Royal Victorian Order 1954. CBE 1950. FRS 1948. President, Institution of Engineers and Shipbuilders in Scotland 1947–9. Honorary Vice-President, Royal Institution of Naval Architects. Military Cross (First World War).
    Bibliography
    1935, "Launch of the quadruple-screw turbine steamer Queen Mary", Transactions of the Institution of Naval Architects 77:1–27 (in this classic paper McNeill displays complete mastery of a difficult subject; it is recorded that prior to launch the estimate for travel of the ship in the River Clyde was 1,194 ft (363.9 m), and the actual amount recorded was 1,196 ft (364.5m)!).
    FMW

    Biographical history of technology > McNeill, Sir James McFadyen

  • 62 Meek, Marshall

    SUBJECT AREA: Ports and shipping
    [br]
    b. 22 April 1925 Auchtermuchty, Fife, Scotland
    [br]
    Scottish naval architect and leading twentieth-century exponent of advanced maritime technology.
    [br]
    After early education at Cupar in Fife, Meek commenced training as a naval architect, taking the then popular sandwich apprenticeship of alternate half years at the University of Glasgow (with a Caird Scholarship) and at a shipyard, in his case the Caledon of Dundee. On leaving Dundee he worked for five years with the British Ship Research Association before joining Alfred Holt \& Co., owners of the Blue Funnel Line. During his twenty-five years at Liverpool, he rose to Chief Naval Architect and Director and was responsible for bringing the cargo-liner concept to its ultimate in design. When the company had become Ocean Fleets, it joined with other British shipowners and looked to Meek for the first purpose-built containership fleet in the world. This required new ship designs, massive worldwide investment in port facilities and marketing to win public acceptance of freight containers, thereby revolutionizing dry-cargo shipping. Under the houseflag of OCL (now POCL), this pioneer service set the highest standards of service and safety and continues to operate on almost every ocean.
    In 1979 Meek returned to the shipbuilding industry when he became Head of Technology at British Shipbuilders. Closely involved in contemporary problems of fuel economy and reduced staffing, he held the post for five years before his appointment as Managing Director of the National Maritime Institute. He was deeply involved in the merger with the British Ship Research Association to form British Maritime Technology (BMT), an organization of which he became Deputy Chairman.
    Marshall Meek has held many public offices, and is one of the few to have been President of two of the United Kingdom's maritime institutions. He has contributed over forty papers to learned societies, has acted as Visiting Professor to Strathclyde University and University College London, and serves on advisory committees to the Ministry of Defence, the Department of Transport and Lloyd's Register of Shipping. While in Liverpool he served as a Justice of the Peace.
    [br]
    Principal Honours and Distinctions
    CBE 1989. Fellow of the Royal Academy of Engineering 1990. President, Royal Institution of Naval Architects 1990–3; North East Coast Institution of Engineers and Shipbuilders 1984–6. Royal Designer for Industry (RDI) 1986. Royal Institution of Naval Architects Silver Medal (on two occasions).
    Bibliography
    1970, "The first OCL containerships", Transactions of the Royal Institution of Naval Architects.
    FMW

    Biographical history of technology > Meek, Marshall

  • 63 Mitchell, Reginald Joseph

    SUBJECT AREA: Aerospace
    [br]
    b. 20 May 1895 Talke, near Stoke-on-Trent, Staffordshire, England
    d. 11 June 1937 Southampton, England
    [br]
    English aircraft designer.
    [br]
    He was the son of a headmaster who, when Mitchell was aged 6 years, set up his own printing business. Mitchell was apprenticed at the age of 16 to a locomotive builder in Stoke and also studied engineering, mechanics, mathematics and drawing at night-school. With the outbreak of war in 1914 he became increasingly interested in aircraft and in 1916 joined the Supermarine Aviation Works at Southampton. Such was his talent for aviation design that within three years he had risen to be Chief Engineer Designer. Initially Mitchell's work was concentrated on flying boats, but with the resurrection after the First World War of the biennial Schneider Trophy races for seaplanes he turned his attention increasingly to high-speed floatplanes. He first achieved success with his S-5 in the 1927 race at Venice and followed it up with further victories in 1929 and 1931 with the S-6 and S-6B, enabling Britain to win the trophy outright (See also Royce, Sir Frederick Henry). Using the experience gained from the Schneider Trophy races, Mitchell now began to design fighter aircraft. He was dissatisfied with his first attempt, which was to produce a fighter to an Air Ministry specification, and started afresh on his own. The result was the Supermarine Spitfire, which was to become one of the outstanding aircraft of the Second World War. Sadly, he died of cancer before his project came to full fruition, with the Spitfire not entering Royal Air Force service until June 1938. The success of Mitchell's designs was due to his ability to combine good engineering with aerodynamic grace.
    [br]
    Principal Honours and Distinctions
    Royal Aeronautical Society Silver Medal 1927. CBE 1931.
    Further Reading
    Ralph Barker, 1971, The Schneider Trophy Races, London: Chatto \& Windus.
    CM

    Biographical history of technology > Mitchell, Reginald Joseph

  • 64 Mole, Lancelot de

    SUBJECT AREA: Weapons and armour
    [br]
    b. 13 March 1880 Adelaide, Australia
    d. 6 May 1950 Sydney, Australia
    [br]
    Australian engineer and early tank designer.
    [br]
    De Mole's father was an architect and surveyor and he himself followed a similar avenue as a draughtsman working on mining, surveying and engineering projects in Australia. It was in 1911, while surveying in particularly rough terrain in Western Australia, that he first conceived the idea of the tank as a tracked, armoured vehicle capable of traversing the most difficult ground. He drew up detailed plans and submitted them to the War Office in London the following year, but although they were rejected, not all the plans were returned to him. When war broke out in 1914 he tried without success to interest the Australian authorities, even after he had constructed a model at their request. A further blow came in 1916, when the first tanks, built by the British, appeared on the battlefields of France and looked remarkably similar in design to his own. Believing that he could play a significant role in further tank development, but lacking the funds to travel to Britain, de Mole eventually succeeded, after an initial rejection by a medical board, in enlisting in the Australian Army, which got him to England at the beginning of 1918. He immediately took his model to the British Inventions Committee, who were sufficiently impressed to pass it to the Tank Board, who promptly mislaid it for six weeks. Meanwhile, in March 1918, Private de Mole was ordered to France and was unable to take matters further. On his return to England in early 1919 he made a formal claim for a reward for his invention, but this was turned down on the grounds that no direct link could be established between his design and the first tanks that were built. Even so, the Inventions Committee did authorize a sum of money to cover his expenses, and in 1920 de Mole was a made a Commander of the Order of the British Empire.
    Returning to Australia, de Mole worked as an engineer in the design branch of the Sydney Water Board. He continued to invent, but none of his designs, which covered a wide range of items, were ever taken up.
    [br]
    Principal Honours and Distinctions
    CBE 1920.
    Further Reading
    Australian Dictionary of Biography, 1918, Vol. 8.
    A.J.Smithers, 1986, A New Excalibur: The Development of the Tank 1909–1939, London: Leo Cooper (for illustrations of the model of his tank).
    Mention of his invention is made in a number of books on the history of the tank.
    CM

    Biographical history of technology > Mole, Lancelot de

  • 65 Moulton, Alexander

    [br]
    b. 9 April 1920 Stratford-on-Avon
    [br]
    English inventor of vehicle suspension systems and the Moulton bicycle.
    [br]
    He spent his childhood at The Hall in Bradfordon-Avon. He was educated at Marlborough College, and in 1937 was apprenticed to the Sentinel Steam Wagon Company of Shrewsbury. About that same time he went to King's College, Cambridge, where he took the Mechanical Sciences Tripos. It was then wartime, and he did research on aero-engines at the Bristol Aeroplane Company, where he became Personal Assistant to Sir Roy Fedden. He left Bristol's in 1945 to join his family firm, Spencer \& Moulton, of which he eventually became Technical Director and built up the Research Department. In 1948 he invented his first suspension unit, the "Flexitor", in which an inner shaft and an outer shell were separated by an annular rubber body which was bonded to both.
    In 1848 his great-grandfather had founded the family firm in an old woollen mill, to manufacture vulcanized rubber products under Charles Goodyear's patent. The firm remained a family business with Spencer's, consultants in railway engineering, until 1956 when it was sold to the Avon Rubber Company. He then formed Moulton Developments to continue his work on vehicle suspensions in the stables attached to The Hall. Sponsored by the British Motor Corporation (BMC) and the Dunlop Rubber Company, he invented a rubber cone spring in 1951 which was later used in the BMC Mini (see Issigonis, Sir Alexander Arnold Constantine): by 1994 over 4 million Minis had been fitted with these springs, made by Dunlop. In 1954 he patented the Hydrolastic suspension system, in which all four wheels were independently sprung with combined rubber springs and damper assembly, the weight being supported by fluid under pressure, and the wheels on each side being interconnected, front to rear. In 1962 he formed Moulton Bicycles Ltd, having designed an improved bicycle system for adult use. The conventional bicycle frame was replaced by a flat-sided oval steel tube F-frame on a novel rubber front and rear suspension, with the wheel size reduced to 41 cm (16 in.) with high-pressure tyres. Raleigh Industries Ltd having refused his offer to produce the Moulton Bicycle under licence, he set up his own factory on his estate, producing 25,000 bicycles between 1963 and 1966. In 1967 he sold out to Raleigh and set up as Bicycle Consultants Ltd while continuing the suspension development of Moulton Developments Ltd. In the 1970s the combined firms employed some forty staff, nearly 50 per cent of whom were graduates.
    He won the Queen's Award for Industry in 1967 for technical innovation in Hydrolastic car suspension and the Moulton Bicycle. Since that time he has continued his innovative work on suspensions and the bicycle. In 1983 he introduced the AM bicycle series of very sophisticated space-frame design with suspension and 43 cm (17 in.) wheels; this machine holds the world speed record fully formed at 82 km/h (51 mph). The current Rover 100 and MGF use his Hydragas interconnected suspension. By 1994 over 7 million cars had been fitted with Moulton suspensions. He has won many design awards and prizes, and has been awarded three honorary doctorates of engineering. He is active in engineering and design education.
    [br]
    Principal Honours and Distinctions
    Queen's Award for Industry 1967; CBE; RDI. Fellow of the Royal Academy of Engineering.
    Further Reading
    P.R.Whitfield, 1975, Creativity in Industry, London: Penguin Books.
    IMcN

    Biographical history of technology > Moulton, Alexander

  • 66 Rickover, Admiral Hyman George

    [br]
    b. 27 January 1900 Russian Poland
    d. 8 July 1986 Arlington, Virginia, USA
    [br]
    Polish/American naval officer, one of the principal architects of the United States nuclear submarine programme.
    [br]
    Born in Poland, Rickover was brought to the United States early in his life by his father, who settled in Chicago as a tailor. Commissioned into the US Navy in 1922, he specialized in electrical engineering (graduating from the US Naval Postgraduate School, Columbia, in 1929), quali-fied as a Submariner in 1931 and then held various posts until appointed Head of the Electrical Section of the Bureau of Ships in 1939. He held this post until the end of the Second World War.
    Rickover was involved briefly in the "Manhattan" atomic bomb project before being assigned to an atomic energy submarine project in 1946. Ultimately he was made responsible for the development and building of the world's first nuclear submarine, the USS Nautilus. He was convinced of the need to make the nuclear submarine an instrument of strategic importance, and this led to the development of the ballistic missile submarine and the Polaris programme.
    Throughout his career he was no stranger to controversy; indeed, his remaining on the active service list as a full admiral until the age of 82 (when forced to retire on the direct intervention of the Navy Secretary) indicates a man beyond the ordinary. He imposed his will on all around him and backed it with a brilliant and clear-thinking brain; his influence was even felt by the Royal Navy during the building of the first British nuclear submarine, HMS Dreadnought. He made many friends, but he also had many detractors.
    [br]
    Principal Honours and Distinctions
    US Distinguished Service Medal with Gold Star. Honorary CBE. US Congress Special Gold Medal 1959. Numerous awards and honorary degrees.
    Bibliography
    Rickover wrote several treatises on education and on the education of engineers. He also wrote on several aspects of the technical history of the US Navy.
    Further Reading
    W.R.Anderson and C.Blair, 1959, Nautilus 90 North, London: Hodder \& Stoughton. E.L.Beach, 1986, The United States Navy, New York: Henry Holt.
    FMW

    Biographical history of technology > Rickover, Admiral Hyman George

  • 67 Sopwith, Sir Thomas (Tommy) Octave Murdoch

    SUBJECT AREA: Aerospace
    [br]
    b. 18 January 1888 London, England
    d. 27 January 1989 Stockbridge, Hampshire, England
    [br]
    English aeronautical engineer and industrialist.
    [br]
    Son of a successful mining engineer, Sopwith did not shine at school and, having been turned down by the Royal Navy as a result, attended an engineering college. His first interest was motor cars and, while still in his teens, he set up a business in London with a friend in order to sell them; he also took part in races and rallies.
    Sopwith's interest in aviation came initially through ballooning, and in 1906 he purchased his own balloon. Four years later, inspired by the recent flights across the Channel to France and after a joy-ride at Brooklands, he bought an Avis monoplane, followed by a larger biplane, and taught himself to fly. He was awarded the Royal Aero Society's Aviator Certificate No. 31 on 21 November 1910, and he quickly distinguished himself in flying competitions on both sides of the Atlantic and started his own flying school. In his races he was ably supported by his friend Fred Sigrist, a former motor engineer. Among the people Sopwith taught to fly were an Australian, Harry Hawker, and Major Hugh Trenchard, who later became the "father" of the RAF.
    In 1912, depressed by the poor quality of the aircraft on trial for the British Army, Sopwith, in conjunction with Hawker and Sigrist, bought a skating rink in Kingston-upon-Thames and, assisted by Fred Sigrist, started to design and build his first aircraft, the Sopwith Hybrid. He sold this to the Royal Navy in 1913, and the following year his aviation manufacturing company became the Sopwith Aviation Company Ltd. That year a seaplane version of his Sopwith Tabloid won the Schneider Trophy in the second running of this speed competition. During 1914–18, Sopwith concentrated on producing fighters (or "scouts" as they were then called), with the Pup, the Camel, the 1½ Strutter, the Snipe and the Sopwith Triplane proving among the best in the war. He also pioneered several ideas to make flying easier for the pilot, and in 1915 he patented his adjustable tailplane and his 1 ½ Strutter was the first aircraft to be fitted with air brakes. During the four years of the First World War, Sopwith Aviation designed thirty-two different aircraft types and produced over 16,000 aircraft.
    The end of the First World War brought recession to the aircraft industry and in 1920 Sopwith, like many others, put his company into receivership; none the less, he immediately launched a new, smaller company with Hawker, Sigrist and V.W.Eyre, which they called the H.G. Hawker Engineering Company Ltd to avoid any confusion with the former company. He began by producing cars and motor cycles under licence, but was determined to resume aircraft production. He suffered an early blow with the death of Hawker in an air crash in 1921, but soon began supplying aircraft to the Royal Air Force again. In this he was much helped by taking on a new designer, Sydney Camm, in 1923, and during the next decade they produced a number of military aircraft types, of which the Hart light bomber and the Fury fighter, the first to exceed 200 mph (322 km/h), were the best known. In the mid-1930s Sopwith began to build a large aviation empire, acquiring first the Gloster Aircraft Company and then, in quick succession, Armstrong-Whitworth, Armstrong-Siddeley Motors Ltd and its aero-engine counterpart, and A.V.Roe, which produced Avro aircraft. Under the umbrella of the Hawker Siddeley Aircraft Company (set up in 1935) these companies produced a series of outstanding aircraft, ranging from the Hawker Hurricane, through the Avro Lancaster to the Gloster Meteor, Britain's first in-service jet aircraft, and the Hawker Typhoon, Tempest and Hunter. When Sopwith retired as Chairman of the Hawker Siddeley Group in 1963 at the age of 75, a prototype jump-jet (the P-1127) was being tested, later to become the Harrier, a for cry from the fragile biplanes of 1910.
    Sopwith also had a passion for yachting and came close to wresting the America's Cup from the USA in 1934 when sailing his yacht Endeavour, which incorporated a number of features years ahead of their time; his greatest regret was that he failed in his attempts to win this famous yachting trophy for Britain. After his retirement as Chairman of the Hawker Siddeley Group, he remained on the Board until 1978. The British aviation industry had been nationalized in April 1977, and Hawker Siddeley's aircraft interests merged with the British Aircraft Corporation to become British Aerospace (BAe). Nevertheless, by then the Group had built up a wide range of companies in the field of mechanical and electrical engineering, and its board conferred on Sopwith the title Founder and Life President.
    [br]
    Principal Honours and Distinctions
    Knighted 1953. CBE 1918.
    Bibliography
    1961, "My first ten years in aviation", Journal of the Royal Aeronautical Society (April) (a very informative and amusing paper).
    Further Reading
    A.Bramson, 1990, Pure Luck: The Authorized Biography of Sir Thomas Sopwith, 1888– 1989, Wellingborough: Patrick Stephens.
    B.Robertson, 1970, Sopwith. The Man and His Aircraft, London (a detailed publication giving plans of all the Sopwith aircraft).
    CM / JDS

    Biographical history of technology > Sopwith, Sir Thomas (Tommy) Octave Murdoch

  • 68 Wallace, Sir William

    SUBJECT AREA: Ports and shipping
    [br]
    b. 25 August 1881 Leicester, England
    d. 27 May 1963 Edinburgh, Scotland
    [br]
    English engineer; developer of the Denny-Brown fin stabilizer for ships.
    [br]
    Wallace was brought up just outside Glasgow, and educated at Paisley Grammar School and later at the Anderson College in Glasgow. The next few years were typical of the early years in the life of many young engineers: he served an apprenticeship at the Paisley shipyard of Bow, MacLachlan, before joining the British and Burmese Steam Navigation Company (Paddy Henderson's Line) as a junior engineer. After some years on the Glasgow to Rangoon service, he rose to the rank of Chief Engineer early in life and then came ashore in 1911.
    He joined the old established Edinburgh engineering company of Brown Brothers as a draughtsman, but by 1917 had been promoted Managing Director. He was appointed Chairman in 1946. During his near thirty years at the helm, he experimented widely and was the engineering force behind the development of the Denny-Brown ship stabilizer which was jointly pursued by Brown Brothers and the Dumbarton shipyard of William Denny \& Brothers. The first important installation was on the cross-channel steamer Isle of Sark, built at Dumbarton for the Southern Railway in 1932. Over the years countless thousands of these installations have been fitted on liners, warships and luxury yachts. Brown Brothers produced many other important engineering innovations at this time, including the steam catapult for aircraft carriers.
    In later years Sir William (now knighted) took an active part in the cultural life of Edinburgh and of Scotland. From 1952 to 1954 he served as President of the Institution of Engineers and Shipbuilders in Scotland.
    [br]
    Principal Honours and Distinctions
    Knighted 1951. CBE 1944. Fellow of the Royal Society of Edinburgh. President, Institution of Engineers and Shipbuilders in Scotland 1952–4; Gold Medal.
    Bibliography
    1954–5 "Experiences in the stabilization of ships", Transactions of the Institution of Engineers and Shipbuilders in Scotland 98:197–266.
    FMW

    Biographical history of technology > Wallace, Sir William

  • 69 Watson-Watt, Sir Robert Alexander

    [br]
    b. 13 April 1892 Brechin, Angus, Scotland
    d. 6 December 1973 Inverness, Scotland
    [br]
    Scottish engineer and scientific adviser known for his work on radar.
    [br]
    Following education at Brechin High School, Watson-Watt entered University College, Dundee (then a part of the University of St Andrews), obtaining a BSc in engineering in 1912. From 1912 until 1921 he was Assistant to the Professor of Natural Philosophy at St Andrews, but during the First World War he also held various posts in the Meteorological Office. During. this time, in 1916 he proposed the use of cathode ray oscillographs for radio-direction-finding displays. He joined the newly formed Radio Research Station at Slough when it was opened in 1924, and 3 years later, when it amalgamated with the Radio Section of the National Physical Laboratory, he became Superintendent at Slough. At this time he proposed the name "ionosphere" for the ionized layer in the upper atmosphere. With E.V. Appleton and J.F.Herd he developed the "squegger" hard-valve transformer-coupled timebase and with the latter devised a direction-finding radio-goniometer.
    In 1933 he was asked to investigate possible aircraft counter-measures. He soon showed that it was impossible to make the wished-for radio "death-ray", but had the idea of using the detection of reflected radio-waves as a means of monitoring the approach of enemy aircraft. With six assistants he developed this idea and constructed an experimental system of radar (RAdio Detection And Ranging) in which arrays of aerials were used to detect the reflected signals and deduce the bearing and height. To realize a practical system, in September 1936 he was appointed Director of the Bawdsey Research Station near Felixstowe and carried out operational studies of radar. The result was that within two years the East Coast of the British Isles was equipped with a network of radar transmitters and receivers working in the 7–14 metre band—the so-called "chain-home" system—which did so much to assist the efficient deployment of RAF Fighter Command against German bombing raids on Britain in the early years of the Second World War.
    In 1938 he moved to the Air Ministry as Director of Communications Development, becoming Scientific Adviser to the Air Ministry and Ministry of Aircraft Production in 1940, then Deputy Chairman of the War Cabinet Radio Board in 1943. After the war he set up Sir Robert Watson-Watt \& Partners, an industrial consultant firm. He then spent some years in relative retirement in Canada, but returned to Scotland before his death.
    [br]
    Principal Honours and Distinctions
    Knighted 1942. CBE 1941. FRS 1941. US Medal of Merit 1946. Royal Society Hughes Medal 1948. Franklin Institute Elliot Cresson Medal 1957. LLD St Andrews 1943. At various times: President, Royal Meteorological Society, Institute of Navigation and Institute of Professional Civil Servants; Vice-President, American Institute of Radio Engineers.
    Bibliography
    1923, with E.V.Appleton \& J.F.Herd, British patent no. 235,254 (for the "squegger"). 1926, with J.F.Herd, "An instantaneous direction reading radio goniometer", Journal of
    the Institution of Electrical Engineers 64:611.
    1933, The Cathode Ray Oscillograph in Radio Research.
    1935, Through the Weather Hours (autobiography).
    1936, "Polarisation errors in direction finders", Wireless Engineer 13:3. 1958, Three Steps to Victory.
    1959, The Pulse of Radar.
    1961, Man's Means to his End.
    Further Reading
    S.S.Swords, 1986, Technical History of the Beginnings of Radar, Stevenage: Peter Peregrinus.
    KF

    Biographical history of technology > Watson-Watt, Sir Robert Alexander

  • 70 Williams, Sir Frederic Calland

    [br]
    b. 26 June 1911 Stockport, Cheshire, England
    d. 11 August 1977 Prestbury, Cheshire, England
    [br]
    English electrical engineer who invented the Williams storage cathode ray tube, which was extensively used worldwide as a data memory in the first digital computers.
    [br]
    Following education at Stockport Grammar School, Williams entered Manchester University in 1929, gaining his BSc in 1932 and MSc in 1933. After a short time as a college apprentice with Metropolitan Vickers, he went to Magdalen College, Oxford, to study for a DPhil, which he was awarded in 1936. He returned to Manchester University that year as an assistant lecturer, gaining his DSc in 1939. Following the outbreak of the Second World War he worked for the Scientific Civil Service, initially at the Bawdsey Research Station and then at the Telecommunications Research Establishment at Malvern, Worcestershire. There he was involved in research on non-incandescent amplifiers and diode rectifiers and the development of the first practical radar system capable of identifying friendly aircraft. Later in the war, he devised an automatic radar system suitable for use by fighter aircraft.
    After the war he resumed his academic career at Manchester, becoming Professor of Electrical Engineering and Director of the University Electrotechnical Laboratory in 1946. In the same year he succeeded in developing a data-memory device based on the cathode ray tube, in which the information was stored and read by electron-beam scanning of a charge-retaining target. The Williams storage tube, as it became known, not only found obvious later use as a means of storing single-frame, still television images but proved to be a vital component of the pioneering Manchester University MkI digital computer. Because it enabled both data and program instructions to be stored in the computer, it was soon used worldwide in the development of the early stored-program computers.
    [br]
    Principal Honours and Distinctions
    Knighted 1976. OBE 1945. CBE 1961. FRS 1950. Hon. DSc Durham 1964, Sussex 1971, Wales 1971. First Royal Society of Arts Benjamin Franklin Medal 1957. City of Philadelphia John Scott Award 1960. Royal Society Hughes Medal 1963. Institution of Electrical Engineers Faraday Medal 1972. Institute of Electrical and Electronics Engineers Pioneer Award 1973.
    Bibliography
    Williams contributed papers to many scientific journals, including Proceedings of the Royal Society, Proceedings of the Cambridge Philosophical Society, Journal of the Institution of Electrical Engineers, Proceedings of the Institution of Mechanical Engineers, Wireless Engineer, Post Office Electrical Engineers' Journal. Note especially: 1948, with J.Kilburn, "Electronic digital computers", Nature 162:487; 1949, with J.Kilburn, "A storage system for use with binary digital computing machines", Proceedings of the Institution of Electrical Engineers 96:81; 1975, "Early computers at Manchester University", Radio \& Electronic Engineer 45:327. Williams also collaborated in the writing of vols 19 and 20 of the MIT Radiation
    Laboratory Series.
    Further Reading
    B.Randell, 1973, The Origins of Digital Computers, Berlin: Springer-Verlag. M.R.Williams, 1985, A History of Computing Technology, London: Prentice-Hall. See also: Stibitz, George R.; Strachey, Christopher.
    KF

    Biographical history of technology > Williams, Sir Frederic Calland

  • 71 undervoltage release

    1. расцепитель минимального напряжения
    2. минимальный расцепитель напряжения
    3. автоматическое выключение цепи от понижения напряжения

     

    автоматическое выключение цепи от понижения напряжения

    [Я.Н.Лугинский, М.С.Фези-Жилинская, Ю.С.Кабиров. Англо-русский словарь по электротехнике и электроэнергетике, Москва]

    Тематики

    • электротехника, основные понятия

    EN

     

    минимальный расцепитель напряжения
    Расцепитель, автоматически срабатывающий, когда подаваемое напряжение опускается ниже заданного уровня.
    [ ГОСТ Р 50030.4.1-2002 (МЭК 60947-4-1-2000)]

    минимальное реле или минимальной расцепитель напряжения
    Реле или расцепитель, допускающие размыкание или замыкание контактного коммутационного аппарата с выдержкой времени или без нее, когда напряжение на выводах этого реле или расцепителя падает ниже заданной величины
    [ ГОСТ Р 50030. 1-2000 ( МЭК 60947-1-99)]

    EN

    under-voltage release
    a shunt release which permits a mechanical switching device to open or close, with or without time-delay, when the voltage across the terminals of the release falls below a predetermined value.
    [IEC 62271-100, ed. 2.0 (2008-04)


    undervoltage release
    release which causes a CBE to open, with or without delay, when the voltage across the terminals of the release falls below a predetermined value
    [IEC 60934, ed. 3.0 (2000-10)]

    FR

    déclencheur à minimum de tension
    déclencheur shunt qui permet l’ouverture ou la fermeture, avec ou sans retard, d’un appareil mécanique de connexion lorsque la tension aux bornes du déclencheur tombe au-dessous d’une valeur prédéterminée.
    [IEC 62271-100, ed. 2.0 (2008-04)]


    déclencheur à manque de tension
    déclencheur qui provoque l'ouverture du DPE avec ou sans retard, lorsque la tension aux bornes du déclencheur tombe au-dessous d'une valeur prédéterminée
    [IEC 60934, ed. 3.0 (2000-10)]


    Параллельные тексты EN-RU

    The undervoltage trip automatically opens a circuit breaker when voltage drops to a value ranging between 35% to 70% of the line voltage.

    The operation is instantaneous, and the circuit breaker cannot be reclosed until the voltage returns to 85% of line voltage.

    Continuously energized, the undervoltage trip must be operating before the circuit breaker can be closed.

    [LS Industrial Systems]

    Минимальный расцепитель напряжения вызывает срабатывание автоматического выключателя, если линейное напряжение защищаемой цепи падает до 35-70 % от номинального значения.

    Срабатывание происходит мгновенно, после чего автоматический выключатель невозможно перевести во включенное положение до тех, пока линейное напряжение защищаемой цепи не повысится до 85 %.

    Минимальный расцепитель постоянно находится под напряжением защищаемой цепи и всегда успевает сработать до того, как будет предпринята попытка включения автоматического выключателя.

    [Перевод Интент]


    В низковольтных автоматических выключателеях минимальный расцепитель напряжения является дополнительной принадлежностью, которая встраивается в гнездо автоматического выключателя

    3429_1
    Дополнительные (электрические) принадлежности, встраиваемые в специальные гнезда автоматического выключателя:
    1 - Левое гнездо;
    2 - Автоматический выключатель;
    3 - Правое гнездо.
    Рис. LS Industrial Systems

    Недопустимые, нерекомендуемые

    Тематики

    Классификация

    >>>

    EN

    FR

     

    расцепитель минимального напряжения

    [Я.Н.Лугинский, М.С.Фези-Жилинская, Ю.С.Кабиров. Англо-русский словарь по электротехнике и электроэнергетике, Москва, 1999 г.]

    Тематики

    • электротехника, основные понятия

    EN

    Англо-русский словарь нормативно-технической терминологии > undervoltage release

  • 72 low-voltage release

    1. расцепитель минимального напряжения
    2. минимальный расцепитель напряжения
    3. автоматическое размыкание (цепи) при пониженном напряжении

     

    автоматическое размыкание (цепи) при пониженном напряжении

    [Я.Н.Лугинский, М.С.Фези-Жилинская, Ю.С.Кабиров. Англо-русский словарь по электротехнике и электроэнергетике, Москва]

    Тематики

    • электротехника, основные понятия

    EN

     

    минимальный расцепитель напряжения
    Расцепитель, автоматически срабатывающий, когда подаваемое напряжение опускается ниже заданного уровня.
    [ ГОСТ Р 50030.4.1-2002 (МЭК 60947-4-1-2000)]

    минимальное реле или минимальной расцепитель напряжения
    Реле или расцепитель, допускающие размыкание или замыкание контактного коммутационного аппарата с выдержкой времени или без нее, когда напряжение на выводах этого реле или расцепителя падает ниже заданной величины
    [ ГОСТ Р 50030. 1-2000 ( МЭК 60947-1-99)]

    EN

    under-voltage release
    a shunt release which permits a mechanical switching device to open or close, with or without time-delay, when the voltage across the terminals of the release falls below a predetermined value.
    [IEC 62271-100, ed. 2.0 (2008-04)


    undervoltage release
    release which causes a CBE to open, with or without delay, when the voltage across the terminals of the release falls below a predetermined value
    [IEC 60934, ed. 3.0 (2000-10)]

    FR

    déclencheur à minimum de tension
    déclencheur shunt qui permet l’ouverture ou la fermeture, avec ou sans retard, d’un appareil mécanique de connexion lorsque la tension aux bornes du déclencheur tombe au-dessous d’une valeur prédéterminée.
    [IEC 62271-100, ed. 2.0 (2008-04)]


    déclencheur à manque de tension
    déclencheur qui provoque l'ouverture du DPE avec ou sans retard, lorsque la tension aux bornes du déclencheur tombe au-dessous d'une valeur prédéterminée
    [IEC 60934, ed. 3.0 (2000-10)]


    Параллельные тексты EN-RU

    The undervoltage trip automatically opens a circuit breaker when voltage drops to a value ranging between 35% to 70% of the line voltage.

    The operation is instantaneous, and the circuit breaker cannot be reclosed until the voltage returns to 85% of line voltage.

    Continuously energized, the undervoltage trip must be operating before the circuit breaker can be closed.

    [LS Industrial Systems]

    Минимальный расцепитель напряжения вызывает срабатывание автоматического выключателя, если линейное напряжение защищаемой цепи падает до 35-70 % от номинального значения.

    Срабатывание происходит мгновенно, после чего автоматический выключатель невозможно перевести во включенное положение до тех, пока линейное напряжение защищаемой цепи не повысится до 85 %.

    Минимальный расцепитель постоянно находится под напряжением защищаемой цепи и всегда успевает сработать до того, как будет предпринята попытка включения автоматического выключателя.

    [Перевод Интент]


    В низковольтных автоматических выключателеях минимальный расцепитель напряжения является дополнительной принадлежностью, которая встраивается в гнездо автоматического выключателя

    3429_1
    Дополнительные (электрические) принадлежности, встраиваемые в специальные гнезда автоматического выключателя:
    1 - Левое гнездо;
    2 - Автоматический выключатель;
    3 - Правое гнездо.
    Рис. LS Industrial Systems

    Недопустимые, нерекомендуемые

    Тематики

    Классификация

    >>>

    EN

    FR

     

    расцепитель минимального напряжения

    [Я.Н.Лугинский, М.С.Фези-Жилинская, Ю.С.Кабиров. Англо-русский словарь по электротехнике и электроэнергетике, Москва, 1999 г.]

    Тематики

    • электротехника, основные понятия

    EN

    Англо-русский словарь нормативно-технической терминологии > low-voltage release

  • 73 computer-based education

    1. компьютеризованное обучение

     

    компьютеризованное обучение

    [Е.С.Алексеев, А.А.Мячев. Англо-русский толковый словарь по системотехнике ЭВМ. Москва 1993]

    Тематики

    EN

    Англо-русский словарь нормативно-технической терминологии > computer-based education

  • 74 over-voltage release

    1. максимальный расцепитель напряжения

     

    максимальный расцепитель напряжения
    -
    [ ГОСТ 17703-72]

    EN

    over-voltage release
    release which causes a CBE to open, with or without delay, when the voltage across the terminals of the release rises above a predetermined value.
    [IEC 60934, ed. 3.0 (2000-10)]

    FR

    déclencheur de surtension
    déclencheur qui provoque l'ouverture d'un DPE, avec ou sans retard, lorsque la tension aux bornes du déclencheur dépasse une valeur prédéterminée.
    [IEC 60934, ed. 3.0 (2000-10)]


     

    Недопустимые, нерекомендуемые

    Классификация

    >>>

    EN

    FR

    Англо-русский словарь нормативно-технической терминологии > over-voltage release

  • 75 overvoltage release

    1. расцепитель максимального напряжения
    2. размыкание по максимальному напряжению
    3. максимальный расцепитель напряжения

     

    максимальный расцепитель напряжения
    -
    [ ГОСТ 17703-72]

    EN

    over-voltage release
    release which causes a CBE to open, with or without delay, when the voltage across the terminals of the release rises above a predetermined value.
    [IEC 60934, ed. 3.0 (2000-10)]

    FR

    déclencheur de surtension
    déclencheur qui provoque l'ouverture d'un DPE, avec ou sans retard, lorsque la tension aux bornes du déclencheur dépasse une valeur prédéterminée.
    [IEC 60934, ed. 3.0 (2000-10)]


     

    Недопустимые, нерекомендуемые

    Классификация

    >>>

    EN

    FR

     

    размыкание по максимальному напряжению

    [Я.Н.Лугинский, М.С.Фези-Жилинская, Ю.С.Кабиров. Англо-русский словарь по электротехнике и электроэнергетике, Москва, 1999 г.]

    Тематики

    • электротехника, основные понятия

    EN

     

    расцепитель максимального напряжения

    [Я.Н.Лугинский, М.С.Фези-Жилинская, Ю.С.Кабиров. Англо-русский словарь по электротехнике и электроэнергетике, Москва, 1999 г.]

    Тематики

    • электротехника, основные понятия

    EN

    Англо-русский словарь нормативно-технической терминологии > overvoltage release

  • 76 undervoltage trip

    1. минимальный расцепитель напряжения
    2. минимальный автомат

     

    минимальный автомат

    [Я.Н.Лугинский, М.С.Фези-Жилинская, Ю.С.Кабиров. Англо-русский словарь по электротехнике и электроэнергетике, Москва]

    Тематики

    • электротехника, основные понятия

    EN

     

    минимальный расцепитель напряжения
    Расцепитель, автоматически срабатывающий, когда подаваемое напряжение опускается ниже заданного уровня.
    [ ГОСТ Р 50030.4.1-2002 (МЭК 60947-4-1-2000)]

    минимальное реле или минимальной расцепитель напряжения
    Реле или расцепитель, допускающие размыкание или замыкание контактного коммутационного аппарата с выдержкой времени или без нее, когда напряжение на выводах этого реле или расцепителя падает ниже заданной величины
    [ ГОСТ Р 50030. 1-2000 ( МЭК 60947-1-99)]

    EN

    under-voltage release
    a shunt release which permits a mechanical switching device to open or close, with or without time-delay, when the voltage across the terminals of the release falls below a predetermined value.
    [IEC 62271-100, ed. 2.0 (2008-04)


    undervoltage release
    release which causes a CBE to open, with or without delay, when the voltage across the terminals of the release falls below a predetermined value
    [IEC 60934, ed. 3.0 (2000-10)]

    FR

    déclencheur à minimum de tension
    déclencheur shunt qui permet l’ouverture ou la fermeture, avec ou sans retard, d’un appareil mécanique de connexion lorsque la tension aux bornes du déclencheur tombe au-dessous d’une valeur prédéterminée.
    [IEC 62271-100, ed. 2.0 (2008-04)]


    déclencheur à manque de tension
    déclencheur qui provoque l'ouverture du DPE avec ou sans retard, lorsque la tension aux bornes du déclencheur tombe au-dessous d'une valeur prédéterminée
    [IEC 60934, ed. 3.0 (2000-10)]


    Параллельные тексты EN-RU

    The undervoltage trip automatically opens a circuit breaker when voltage drops to a value ranging between 35% to 70% of the line voltage.

    The operation is instantaneous, and the circuit breaker cannot be reclosed until the voltage returns to 85% of line voltage.

    Continuously energized, the undervoltage trip must be operating before the circuit breaker can be closed.

    [LS Industrial Systems]

    Минимальный расцепитель напряжения вызывает срабатывание автоматического выключателя, если линейное напряжение защищаемой цепи падает до 35-70 % от номинального значения.

    Срабатывание происходит мгновенно, после чего автоматический выключатель невозможно перевести во включенное положение до тех, пока линейное напряжение защищаемой цепи не повысится до 85 %.

    Минимальный расцепитель постоянно находится под напряжением защищаемой цепи и всегда успевает сработать до того, как будет предпринята попытка включения автоматического выключателя.

    [Перевод Интент]


    В низковольтных автоматических выключателеях минимальный расцепитель напряжения является дополнительной принадлежностью, которая встраивается в гнездо автоматического выключателя

    3429_1
    Дополнительные (электрические) принадлежности, встраиваемые в специальные гнезда автоматического выключателя:
    1 - Левое гнездо;
    2 - Автоматический выключатель;
    3 - Правое гнездо.
    Рис. LS Industrial Systems

    Недопустимые, нерекомендуемые

    Тематики

    Классификация

    >>>

    EN

    FR

    Англо-русский словарь нормативно-технической терминологии > undervoltage trip

  • 77 under voltage release

    1. минимальный расцепитель напряжения

     

    минимальный расцепитель напряжения
    Расцепитель, автоматически срабатывающий, когда подаваемое напряжение опускается ниже заданного уровня.
    [ ГОСТ Р 50030.4.1-2002 (МЭК 60947-4-1-2000)]

    минимальное реле или минимальной расцепитель напряжения
    Реле или расцепитель, допускающие размыкание или замыкание контактного коммутационного аппарата с выдержкой времени или без нее, когда напряжение на выводах этого реле или расцепителя падает ниже заданной величины
    [ ГОСТ Р 50030. 1-2000 ( МЭК 60947-1-99)]

    EN

    under-voltage release
    a shunt release which permits a mechanical switching device to open or close, with or without time-delay, when the voltage across the terminals of the release falls below a predetermined value.
    [IEC 62271-100, ed. 2.0 (2008-04)


    undervoltage release
    release which causes a CBE to open, with or without delay, when the voltage across the terminals of the release falls below a predetermined value
    [IEC 60934, ed. 3.0 (2000-10)]

    FR

    déclencheur à minimum de tension
    déclencheur shunt qui permet l’ouverture ou la fermeture, avec ou sans retard, d’un appareil mécanique de connexion lorsque la tension aux bornes du déclencheur tombe au-dessous d’une valeur prédéterminée.
    [IEC 62271-100, ed. 2.0 (2008-04)]


    déclencheur à manque de tension
    déclencheur qui provoque l'ouverture du DPE avec ou sans retard, lorsque la tension aux bornes du déclencheur tombe au-dessous d'une valeur prédéterminée
    [IEC 60934, ed. 3.0 (2000-10)]


    Параллельные тексты EN-RU

    The undervoltage trip automatically opens a circuit breaker when voltage drops to a value ranging between 35% to 70% of the line voltage.

    The operation is instantaneous, and the circuit breaker cannot be reclosed until the voltage returns to 85% of line voltage.

    Continuously energized, the undervoltage trip must be operating before the circuit breaker can be closed.

    [LS Industrial Systems]

    Минимальный расцепитель напряжения вызывает срабатывание автоматического выключателя, если линейное напряжение защищаемой цепи падает до 35-70 % от номинального значения.

    Срабатывание происходит мгновенно, после чего автоматический выключатель невозможно перевести во включенное положение до тех, пока линейное напряжение защищаемой цепи не повысится до 85 %.

    Минимальный расцепитель постоянно находится под напряжением защищаемой цепи и всегда успевает сработать до того, как будет предпринята попытка включения автоматического выключателя.

    [Перевод Интент]


    В низковольтных автоматических выключателеях минимальный расцепитель напряжения является дополнительной принадлежностью, которая встраивается в гнездо автоматического выключателя

    3429_1
    Дополнительные (электрические) принадлежности, встраиваемые в специальные гнезда автоматического выключателя:
    1 - Левое гнездо;
    2 - Автоматический выключатель;
    3 - Правое гнездо.
    Рис. LS Industrial Systems

    Недопустимые, нерекомендуемые

    Тематики

    Классификация

    >>>

    EN

    FR

    Англо-русский словарь нормативно-технической терминологии > under voltage release

  • 78 under voltage trip

    1. минимальный расцепитель напряжения

     

    минимальный расцепитель напряжения
    Расцепитель, автоматически срабатывающий, когда подаваемое напряжение опускается ниже заданного уровня.
    [ ГОСТ Р 50030.4.1-2002 (МЭК 60947-4-1-2000)]

    минимальное реле или минимальной расцепитель напряжения
    Реле или расцепитель, допускающие размыкание или замыкание контактного коммутационного аппарата с выдержкой времени или без нее, когда напряжение на выводах этого реле или расцепителя падает ниже заданной величины
    [ ГОСТ Р 50030. 1-2000 ( МЭК 60947-1-99)]

    EN

    under-voltage release
    a shunt release which permits a mechanical switching device to open or close, with or without time-delay, when the voltage across the terminals of the release falls below a predetermined value.
    [IEC 62271-100, ed. 2.0 (2008-04)


    undervoltage release
    release which causes a CBE to open, with or without delay, when the voltage across the terminals of the release falls below a predetermined value
    [IEC 60934, ed. 3.0 (2000-10)]

    FR

    déclencheur à minimum de tension
    déclencheur shunt qui permet l’ouverture ou la fermeture, avec ou sans retard, d’un appareil mécanique de connexion lorsque la tension aux bornes du déclencheur tombe au-dessous d’une valeur prédéterminée.
    [IEC 62271-100, ed. 2.0 (2008-04)]


    déclencheur à manque de tension
    déclencheur qui provoque l'ouverture du DPE avec ou sans retard, lorsque la tension aux bornes du déclencheur tombe au-dessous d'une valeur prédéterminée
    [IEC 60934, ed. 3.0 (2000-10)]


    Параллельные тексты EN-RU

    The undervoltage trip automatically opens a circuit breaker when voltage drops to a value ranging between 35% to 70% of the line voltage.

    The operation is instantaneous, and the circuit breaker cannot be reclosed until the voltage returns to 85% of line voltage.

    Continuously energized, the undervoltage trip must be operating before the circuit breaker can be closed.

    [LS Industrial Systems]

    Минимальный расцепитель напряжения вызывает срабатывание автоматического выключателя, если линейное напряжение защищаемой цепи падает до 35-70 % от номинального значения.

    Срабатывание происходит мгновенно, после чего автоматический выключатель невозможно перевести во включенное положение до тех, пока линейное напряжение защищаемой цепи не повысится до 85 %.

    Минимальный расцепитель постоянно находится под напряжением защищаемой цепи и всегда успевает сработать до того, как будет предпринята попытка включения автоматического выключателя.

    [Перевод Интент]


    В низковольтных автоматических выключателеях минимальный расцепитель напряжения является дополнительной принадлежностью, которая встраивается в гнездо автоматического выключателя

    3429_1
    Дополнительные (электрические) принадлежности, встраиваемые в специальные гнезда автоматического выключателя:
    1 - Левое гнездо;
    2 - Автоматический выключатель;
    3 - Правое гнездо.
    Рис. LS Industrial Systems

    Недопустимые, нерекомендуемые

    Тематики

    Классификация

    >>>

    EN

    FR

    Англо-русский словарь нормативно-технической терминологии > under voltage trip

  • 79 under voltage trip coil

    1. минимальный расцепитель напряжения

     

    минимальный расцепитель напряжения
    Расцепитель, автоматически срабатывающий, когда подаваемое напряжение опускается ниже заданного уровня.
    [ ГОСТ Р 50030.4.1-2002 (МЭК 60947-4-1-2000)]

    минимальное реле или минимальной расцепитель напряжения
    Реле или расцепитель, допускающие размыкание или замыкание контактного коммутационного аппарата с выдержкой времени или без нее, когда напряжение на выводах этого реле или расцепителя падает ниже заданной величины
    [ ГОСТ Р 50030. 1-2000 ( МЭК 60947-1-99)]

    EN

    under-voltage release
    a shunt release which permits a mechanical switching device to open or close, with or without time-delay, when the voltage across the terminals of the release falls below a predetermined value.
    [IEC 62271-100, ed. 2.0 (2008-04)


    undervoltage release
    release which causes a CBE to open, with or without delay, when the voltage across the terminals of the release falls below a predetermined value
    [IEC 60934, ed. 3.0 (2000-10)]

    FR

    déclencheur à minimum de tension
    déclencheur shunt qui permet l’ouverture ou la fermeture, avec ou sans retard, d’un appareil mécanique de connexion lorsque la tension aux bornes du déclencheur tombe au-dessous d’une valeur prédéterminée.
    [IEC 62271-100, ed. 2.0 (2008-04)]


    déclencheur à manque de tension
    déclencheur qui provoque l'ouverture du DPE avec ou sans retard, lorsque la tension aux bornes du déclencheur tombe au-dessous d'une valeur prédéterminée
    [IEC 60934, ed. 3.0 (2000-10)]


    Параллельные тексты EN-RU

    The undervoltage trip automatically opens a circuit breaker when voltage drops to a value ranging between 35% to 70% of the line voltage.

    The operation is instantaneous, and the circuit breaker cannot be reclosed until the voltage returns to 85% of line voltage.

    Continuously energized, the undervoltage trip must be operating before the circuit breaker can be closed.

    [LS Industrial Systems]

    Минимальный расцепитель напряжения вызывает срабатывание автоматического выключателя, если линейное напряжение защищаемой цепи падает до 35-70 % от номинального значения.

    Срабатывание происходит мгновенно, после чего автоматический выключатель невозможно перевести во включенное положение до тех, пока линейное напряжение защищаемой цепи не повысится до 85 %.

    Минимальный расцепитель постоянно находится под напряжением защищаемой цепи и всегда успевает сработать до того, как будет предпринята попытка включения автоматического выключателя.

    [Перевод Интент]


    В низковольтных автоматических выключателеях минимальный расцепитель напряжения является дополнительной принадлежностью, которая встраивается в гнездо автоматического выключателя

    3429_1
    Дополнительные (электрические) принадлежности, встраиваемые в специальные гнезда автоматического выключателя:
    1 - Левое гнездо;
    2 - Автоматический выключатель;
    3 - Правое гнездо.
    Рис. LS Industrial Systems

    Недопустимые, нерекомендуемые

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    Англо-русский словарь нормативно-технической терминологии > under voltage trip coil

  • 80 under voltage trip device

    1. минимальный расцепитель напряжения

     

    минимальный расцепитель напряжения
    Расцепитель, автоматически срабатывающий, когда подаваемое напряжение опускается ниже заданного уровня.
    [ ГОСТ Р 50030.4.1-2002 (МЭК 60947-4-1-2000)]

    минимальное реле или минимальной расцепитель напряжения
    Реле или расцепитель, допускающие размыкание или замыкание контактного коммутационного аппарата с выдержкой времени или без нее, когда напряжение на выводах этого реле или расцепителя падает ниже заданной величины
    [ ГОСТ Р 50030. 1-2000 ( МЭК 60947-1-99)]

    EN

    under-voltage release
    a shunt release which permits a mechanical switching device to open or close, with or without time-delay, when the voltage across the terminals of the release falls below a predetermined value.
    [IEC 62271-100, ed. 2.0 (2008-04)


    undervoltage release
    release which causes a CBE to open, with or without delay, when the voltage across the terminals of the release falls below a predetermined value
    [IEC 60934, ed. 3.0 (2000-10)]

    FR

    déclencheur à minimum de tension
    déclencheur shunt qui permet l’ouverture ou la fermeture, avec ou sans retard, d’un appareil mécanique de connexion lorsque la tension aux bornes du déclencheur tombe au-dessous d’une valeur prédéterminée.
    [IEC 62271-100, ed. 2.0 (2008-04)]


    déclencheur à manque de tension
    déclencheur qui provoque l'ouverture du DPE avec ou sans retard, lorsque la tension aux bornes du déclencheur tombe au-dessous d'une valeur prédéterminée
    [IEC 60934, ed. 3.0 (2000-10)]


    Параллельные тексты EN-RU

    The undervoltage trip automatically opens a circuit breaker when voltage drops to a value ranging between 35% to 70% of the line voltage.

    The operation is instantaneous, and the circuit breaker cannot be reclosed until the voltage returns to 85% of line voltage.

    Continuously energized, the undervoltage trip must be operating before the circuit breaker can be closed.

    [LS Industrial Systems]

    Минимальный расцепитель напряжения вызывает срабатывание автоматического выключателя, если линейное напряжение защищаемой цепи падает до 35-70 % от номинального значения.

    Срабатывание происходит мгновенно, после чего автоматический выключатель невозможно перевести во включенное положение до тех, пока линейное напряжение защищаемой цепи не повысится до 85 %.

    Минимальный расцепитель постоянно находится под напряжением защищаемой цепи и всегда успевает сработать до того, как будет предпринята попытка включения автоматического выключателя.

    [Перевод Интент]


    В низковольтных автоматических выключателеях минимальный расцепитель напряжения является дополнительной принадлежностью, которая встраивается в гнездо автоматического выключателя

    3429_1
    Дополнительные (электрические) принадлежности, встраиваемые в специальные гнезда автоматического выключателя:
    1 - Левое гнездо;
    2 - Автоматический выключатель;
    3 - Правое гнездо.
    Рис. LS Industrial Systems

    Недопустимые, нерекомендуемые

    Тематики

    Классификация

    >>>

    EN

    FR

    Англо-русский словарь нормативно-технической терминологии > under voltage trip device

См. также в других словарях:

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  • CBE — abbrev. Commander of (the Order of) the British Empire …   English World dictionary

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  • CBE — abbr. Commander of the Order of the British Empire. * * * abbrev Commander of the (Order of the) British Empire * * * CBE UK [ˌsiː biː ˈiː] US [ˌsi bi ˈi] noun [countable] [singular CBE plural CBEs] Commander of the British Empire: a special titl …   Useful english dictionary

  • CBE-FM — Infobox Radio Station name = CBE FM airdate = October 15 1978 frequency = 89.9 MHz (FM) area = Windsor, Ontario format = public broadcasting owner = Canadian Broadcasting Corporation erp = 100,000 watts branding = CBC Radio Two slogan = class =… …   Wikipedia

  • CBE — Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom.   Sigles d’une seule lettre   Sigles de deux lettres > Sigles de trois lettres   Sigles de quatre lettres …   Wikipédia en Français

  • CBE — UK [ˌsiː biː ˈiː] / US [ˌsɪ bɪ ˈɪ] noun [countable] Word forms CBE : singular CBE plural CBEs Commander of the British Empire: a special title given to someone in the UK whose work has helped the country …   English dictionary

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