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become+aroused

  • 1 Plimsoll, Samuel

    SUBJECT AREA: Ports and shipping
    [br]
    b. 10 February 1824 Bristol, England
    d. 8 June 1898 Folkestone, Kent, England
    [br]
    English inventor of the Plimsoll Line on ships.
    [br]
    Plimsoll was educated privately and at Dr Eadon's school in Sheffield. On leaving school he became Clerk to a solicitor and then to a brewery, where he rose to become Manager. In 1851 he acted as an honorary secretary to the Great Exhibition. Two years later he went to London and set up as a coal merchant: he published two pamphlets on the coal trade in 1862. After several unsuccessful attempts, he managed to be elected as Member of Parliament for Derby in 1868, in the Radical interest. He concerned himself with mercantile shipping and in 1870 he began his campaign to improve safety at sea, particularly by the imposition of a load-line on vessels to prevent dangerous overloading. In 1871 he introduced a resolution into the House of Commons and also a bill, the Government also having proposed one on the same subject, but strong opposition from the powerful shipping-business interest forced a withdrawal. Plimsoll published a pamphlet, Our Seamen, bitterly attacking the shipowners. This aroused public feeling and controversy, and under pressure the Government appointed a Royal Commission in 1873, under the chairmanship of the Duke of Somerset, to examine the matter. Their report did not support Plimsoll's proposal for a load-line, but that did not prevent him from bringing forward his own bill, which was narrowly defeated by only three votes. The Government then introduced its own merchant shipping bill in 1875, but it was so mauled by the Opposition that the Prime Minister, Disraeli, threatened to withdraw it. That provoked a violent protest from Plimsoll in the House, including a description of the shipowners which earned him temporary suspension from the House. He was allowed to return after an apology, but the incident served to heighten public feeling for the seamen. The Government were obliged to hustle through the Merchant Shipping Act 1876, which ensured, among other things, that ships should be marked with what has become universally known as the Plimsoll Line; Plimsoll himself became known as "The Seamen's Friend".
    In 1880 he relinquished his parliamentary seat at Derby, but he continued his campaign to improve conditions for seamen and to ensure that the measures in the Act were properly carried out.
    LRD

    Biographical history of technology > Plimsoll, Samuel

  • 2 sexually

    adverb sexualmente
    tr['sekʃʊəlɪ]
    1 sexualmente
    \
    SMALLIDIOMATIC EXPRESSION/SMALL
    sexually transmitted disease enfermedad nombre femenino de transmisión sexual
    adv.
    • sexualmente adv.
    'sekʃuəli
    adverb sexualmente
    ['seksjʊǝlɪ]
    ADV sexualmente

    • to be sexually active — ser sexualmente activo

    • to become or get sexually aroused — excitarse sexualmente

    • to be sexually harassed — sufrir acoso sexual

    • to be sexually involved with sb — mantener relaciones sexuales con algn

    • sexually mature — sexualmente maduro

    • sexually transmitted disease — enfermedad f de transmisión sexual

    * * *
    ['sekʃuəli]
    adverb sexualmente

    English-spanish dictionary > sexually

  • 3 drive

    1. noun
    1) Fahrt, die

    a nine-hour drive, a drive of nine hours — eine neunstündige Autofahrt

    2) (street) Straße, die
    3) (private road) Zufahrt, die; (entrance to large building) Auffahrt, die
    4) (energy to achieve) Tatkraft, die
    5) (Commerc., Polit., etc.): (vigorous campaign) Aktion, die; Kampagne, die

    export/sales/recruiting drive — Export- / Verkaufs- / Anwerbekampagne, die

    6) (Psych.) Trieb, der
    7) (Motor Veh.): (position of steering wheel)

    left-hand/right-hand drive — Links-/Rechtssteuerung od. -lenkung, die

    8) (Motor Veh., Mech. Engin.): (transmission of power) Antrieb, der

    front-wheel/rear-wheel drive — Front-/Heckantrieb, der

    2. transitive verb,
    1) fahren [Auto, Lkw, Route, Strecke, Fahrgast]; lenken [Kutsche, Streitwagen]; treiben [Tier]
    2) (as job)

    drive a lorry/train — Lkw-Fahrer/Lokomotivführer sein

    3) (compel to move) vertreiben

    drive somebody out of or from a place/country — jemanden von einem Ort/aus einem Land vertreiben

    4) (chase, urge on) treiben [Vieh, Wild]
    5) (fig.)

    drive somebody out of his mind or wits — jemanden in den Wahnsinn treiben

    6) [Wind, Wasser:] treiben
    7) (cause to penetrate)

    drive something into something — etwas in etwas (Akk.) treiben

    8) (power) antreiben [Mühle, Maschine]

    be steam-driven or driven by steam — dampfgetrieben sein

    9) (incite to action) antreiben

    drive oneself [too] hard — sich [zu sehr] schinden

    3. intransitive verb,
    drove, driven

    in Great Britain we drive on the left — bei uns in Großbritannien ist Linksverkehr

    drive at 30 m.p.h. — mit 50 km/h fahren

    learn to drive — [Auto]fahren lernen; den Führerschein machen (ugs.)

    can you drive? — kannst du Auto fahren?

    2) (go by car) mit dem [eigenen] Auto fahren
    3) [Hagelkörner, Wellen:] schlagen
    Phrasal Verbs:
    - academic.ru/86427/drive_at">drive at
    * * *
    1. past tense - drove; verb
    1) (to control or guide (a car etc): Do you want to drive (the car), or shall I?) fahren
    2) (to take, bring etc in a car: My mother is driving me to the airport.) fahren
    3) (to force or urge along: Two men and a dog were driving a herd of cattle across the road.) treiben
    4) (to hit hard: He drove a nail into the door; He drove a golf-ball from the tee.) schlagen
    5) (to cause to work by providing the necessary power: This mill is driven by water.) betreiben
    2. noun
    1) (a journey in a car, especially for pleasure: We decided to go for a drive.) die Fahrt
    2) (a private road leading from a gate to a house etc: The drive is lined with trees.) die Auffahrt
    3) (energy and enthusiasm: I think he has the drive needed for this job.) die Tatkraft
    4) (a special effort: We're having a drive to save electricity.) der Antrieb
    5) (in sport, a hard stroke (with a golf-club, a cricket bat etc).) der Stoß
    6) ((computers) a disk drive.)
    •
    - driver
    - driver's license
    - drive-in
    - drive-through
    - driving licence
    - be driving at
    - drive off
    - drive on
    * * *
    [draɪv]
    I. n
    1. (trip) Fahrt f
    to go for a \drive eine Spazierfahrt machen, spazieren fahren
    let's go for a \drive in the new car lass uns eine Spritztour mit dem neuen Wagen machen fam
    to go for a \drive to the mountains/seaside in die Berge/ans Meer fahren
    to take sb [out] for [or on] a \drive mit jdm eine Spazierfahrt machen [o spazieren fahren]
    shall I take you for a \drive to the seaside? wollen wir ans Meer fahren?
    2. no pl (distance) Fahrt f
    it is a 20-mile/20-minute \drive to the airport der Flughafen ist 30 Kilometer/20 Minuten [Autofahrt] entfernt, zum Flughafen sind es [mit dem Auto] 30 Kilometer/20 Minuten
    a day's \drive eine Tagesfahrt
    to be an hour's \drive away/within an hour's \drive eine/keine Autostunde entfernt sein
    to be an hour's \drive from/within an hours' \drive of sth eine/keine Autostunde von etw dat entfernt sein
    3. (road, street) [Fahr]straße f; (lane) [Fahr]weg m; (approaching road) Zufahrt f; (car entrance) Einfahrt f; (to a large building) Auffahrt f
    4. no pl AUTO, TECH (transmission) Antrieb m
    all-wheel \drive Allradantrieb m
    front-wheel \drive Vorderradantrieb m, Frontantrieb m
    5. no pl (steering)
    left-/right-hand \drive Links-/Rechtssteuerung f
    6. no pl (energy) Tatkraft f, Energie f; (élan, vigour) Schwung m, Elan m, Drive m; (motivation) Tatendrang m; (persistence) Biss m fam
    she lacks \drive es fehlt ihr an Elan
    we need a manager with \drive wir brauchen einen tatkräftigen [o dynamischen] Manager
    to have [no] \drive [keinen] Schwung [o Elan] haben
    he has the \drive to succeed er hat den nötigen Biss, um es zu schaffen fam
    7. no pl PSYCH Trieb m
    sex \drive Geschlechtstrieb m, Sexualtrieb m, Libido f fachspr
    8. (campaign) Aktion f, Kampagne f
    economy \drive Sparmaßnahmen pl
    to be on an economy \drive Sparmaßnahmen durchführen
    fund-raising \drive Spenden[sammel]aktion f
    to organize a \drive to collect money eine Sammelaktion organisieren
    recruitment \drive Anwerbungskampagne f
    membership [recruitment] \drive Mitgliederwerbeaktion f, Mitglieder-Anwerbungskampagne f
    9. SPORT (in golf, tennis) Treibschlag m BRD, ÖSTERR fachspr, Drive m fachspr; (in badminton) Treibball m BRD, ÖSTERR fachspr
    10. COMPUT Laufwerk nt
    disk \drive Diskettenlaufwerk nt
    CD-ROM \drive CD-ROM-Laufwerk nt
    hard \drive Festplatte f
    cattle \drive Viehtrieb m
    II. vt
    <drove, -n>
    ▪ to \drive sth etw fahren
    to \drive a racing car einen Rennwagen steuern
    to \drive a bus/coach einen Bus lenken; (as a job) Busfahrer(in) m(f) sein
    ▪ to \drive sb jdn fahren
    to \drive sb home/to school jdn nach Hause/zur Schule fahren
    3. (force onward[s])
    ▪ to \drive sb/an animal jdn/ein Tier antreiben; ( fig)
    to \drive oneself too hard sich dat zu viel zumuten
    4. (force, make go)
    ▪ to \drive sb/sth against/into sth jdn/etw gegen/in etw akk treiben
    the rain was \driven against the windows by the wind der Wind peitschte den Regen gegen die Fenster
    the wind drove the snow into my face der Wind wehte mir den Schnee ins Gesicht
    the storm threatened to \drive us against the cliffs der Sturm drohte uns gegen die Klippen zu schleudern
    ▪ to \drive an animal into/out of sth ein Tier in etw akk /aus etw dat heraus treiben
    ▪ to \drive sb/an animal to sth jdn/ein Tier zu etw dat treiben
    to \drive sb to the border/woods jdn zur Grenze/in den Wald treiben
    5. (expel)
    to \drive sb from [or out of] sth jdn aus etw dat vertreiben [o verjagen]
    to be \driven from [or out of] the city/country aus der Stadt/dem Land vertrieben werden
    to \drive sb from [or out of] the house jdn aus dem Haus jagen
    ▪ to \drive sb/sth jdn/etw treiben
    he was \driven by greed Gier bestimmte sein Handeln
    the government has \driven the economy into deep recession die Regierung hat die Wirtschaft in eine tiefe Rezession gestürzt
    the scandal drove the minister out of office der Skandal zwang den Minister zur Amtsniederlegung
    banning boxing would \drive the sport underground ein Verbot des Boxsports würde dazu führen, dass dieser Sport heimlich weiterbetrieben wird
    to \drive sb to despair jdn zur Verzweiflung treiben
    to \drive sb to drink jdn zum Trinker werden lassen
    to \drive sb to suicide jdn in den Selbstmord treiben
    ▪ to \drive sb to do sth jdn dazu treiben [o bewegen] [o bringen], etw zu tun
    it was the arguments that drove her to leave home wegen all der Streitereien verließ sie schließlich ihr Zuhause
    7. (render)
    to \drive sb mad [or crazy] [or insane] ( fam) jdn zum Wahnsinn treiben, jdn wahnsinnig [o verrückt] machen fam
    it's driving me mad! das macht mich noch wahnsinnig! fam
    to \drive an animal wild ein Tier wild machen
    to \drive sb wild (crazy, angry) jdn wahnsinnig machen fam; (aroused) jdn heißmachen sl
    8. (hit into place)
    ▪ to \drive sth between/into/through sth etw zwischen/in/durch etw akk schlagen [o treiben]
    to \drive a post into the ground einen Pfosten in den Boden rammen
    ▪ to \drive sth engine etw antreiben; COMPUT interface etw treiben [o steuern]
    steam-\driven dampfbetrieben, dampfangetrieben
    to \drive a ball einen Ball treiben [o fachspr driven
    11.
    ▶ to \drive a coach and horses through sth ( fam) etw auseinandernehmen fig fam
    ▶ to \drive a hard bargain hart verhandeln
    you really want £2,000 for that? you certainly \drive a hard bargain! Sie wollen tatsächlich 2.000 Pfund dafür? das ist ja wohl total überzogen! fam
    ▶ to \drive one's message [or point] home seinen Standpunkt klarmachen
    ▶ to \drive a wedge between two people einen Keil zwischen zwei Menschen treiben
    III. vi
    <drove, -n>
    1. (steer vehicle) fahren
    can you \drive? kannst du Auto fahren?
    can you \drive home? kannst du nach Hause fahren?
    who was driving at the time of the accident? wer saß zur Zeit des Unfalls am Steuer?
    to learn to \drive [Auto] fahren lernen, den Führerschein [o SCHWEIZ Fahrausweis] machen
    2. (move) fahren; (travel) mit dem Auto fahren
    are you going by train? — no, I'm driving fahren Sie mit dem Zug? — nein, mit dem Auto
    to \drive on/past weiter-/vorbeifahren
    3. (function) fahren, laufen
    4. rain, snow peitschen; clouds jagen
    the rain was driving down der Regen peitschte herab
    the snow was driving into my face der Schnee peitschte mir ins Gesicht
    the clouds were driving across the sky die Wolken jagten vorbei [o über den Himmel]
    * * *
    [draɪv] vb: pret drove, ptp driven
    1. n
    1) (AUT: journey) (Auto)fahrt f
    2) (into house) Einfahrt f; (longer) Auffahrt f, Zufahrt f
    3) (GOLF, TENNIS) Treibschlag m
    5) (= energy) Schwung m, Elan m, Tatendrang m

    you're losing your drive —

    6) (COMM, POL ETC) Aktion f
    See:
    → export
    7) (MIL: offensive) kraftvolle Offensive
    8) (MECH: power transmission) Antrieb m

    front-wheel/rear-wheel drive — Vorderrad-/Hinterradantrieb m

    9) (AUT) Steuerung f
    10)
    See:
    → whist
    11) (COMPUT) Laufwerk nt
    2. vt
    1) (= cause to move) people, animals, dust, clouds etc treiben

    to drive a nail/stake into sth — einen Nagel/Pfahl in etw (acc) treiben

    2) cart, car, train fahren

    he drives a taxi (for a living) — er ist Taxifahrer, er fährt Taxi (inf)

    3) (= convey in vehicle) person fahren

    I'll drive you home —

    4) (= provide power for, operate) motor (belt, shaft) antreiben; (electricity, fuel) betreiben; (COMPUT) steuern

    a car driven by electricity — ein Auto nt mit Elektroantrieb

    5) (TENNIS, GOLF) ball driven (spec)
    6) (= cause to be in a state or to become) treiben

    to drive sb to murder —

    who/what drove you to do that? — wer/was trieb or brachte Sie dazu(, das zu tun)?

    7) (= force to work hard) person hart herannehmen, schinden (pej)
    8) tunnel treiben; well ausheben; nail schlagen
    3. vi
    1) (= travel in vehicle) fahren

    to drive at 50 km an hour —

    did you come by train? – no, we drove — sind Sie mit der Bahn gekommen? – nein, wir sind mit dem Auto gefahren

    driving while intoxicated (US) — Fahren nt in betrunkenem Zustand, Trunkenheit f am Steuer

    2) (= move violently) schlagen, peitschen
    * * *
    drive [draıv]
    A s
    1. Fahrt f, besonders Ausfahrt f, Spazierfahrt f, Ausflug m:
    take a drive, go for a drive → drive out A 2;
    the drive back die Rückfahrt;
    an hour’s drive away eine Autostunde entfernt
    2. a) Treiben n (von Vieh, Holz etc)
    b) Zusammentreiben n (von Vieh)
    c) zusammengetriebene Tiere pl
    3. JAGD Treibjagd f
    4. besonders Tennis, Golf: Drive m, Treibschlag m
    5. MIL Vorstoß m (auch fig)
    6. fig Kampagne f, (besonders Werbe) Feldzug m, (besonders Sammel) Aktion f
    7. fig Schwung m, Elan m, Dynamik f
    8. fig Druck m:
    I’m in such a drive that … ich stehe so sehr unter Druck, dass …
    9. a) Tendenz f, Neigung f ( auch PSYCH)
    b) PSYCH Trieb m: → sexual
    10. a) Fahrstraße f, -weg m
    b) (private) Auffahrt (zu einer Villa etc)
    c) Zufahrtsstraße f, -weg m
    11. a) TECH Antrieb m
    b) COMPUT Laufwerk n
    12. AUTO (Links- etc) Steuerung
    B v/t prät drove [drəʊv], obs drave [dreıv], pperf driven [ˈdrıvn]
    1. (vorwärts)treiben, antreiben:
    drive all before one fig jeden Widerstand überwinden, unaufhaltsam sein
    2. fig treiben:
    drive sb to death (suicide) jemanden in den Tod (zum oder in den Selbstmord) treiben; → bend A 1, corner A 3, crazy 1, desperation 1, mad A 1, wall Bes Redew, wild A 9
    3. einen Nagel etc treiben, schlagen, einen Pfahl rammen ( alle:
    into in akk):
    drive sth into sb fig jemandem etwas einbläuen; → home C 3, wedge A 1
    4. (zur Arbeit) antreiben, hetzen:
    a) jemanden schinden,
    b) jemanden in die Enge treiben
    5. jemanden veranlassen (to, into zu; to do zu tun), bringen (to, into zu), dazu bringen oder treiben ( to do zu tun):
    be driven by hunger vom Hunger getrieben werden
    6. jemanden nötigen, zwingen ( beide:
    to, into zu;
    to do zu tun)
    7. zusammentreiben
    8. vertreiben, verjagen ( beide:
    from von)
    9. JAGD treiben, hetzen, jagen
    10. ein Auto etc lenken, steuern, fahren:
    drive one’s own car seinen eigenen Wagen fahren
    11. (im Auto etc) fahren, befördern, bringen ( alle:
    to nach)
    12. TECH (an)treiben:
    driven by steam mit Dampf betrieben, mit Dampfantrieb
    13. zielbewusst durchführen:
    drive a good bargain ein Geschäft zu einem vorteilhaften Abschluss bringen;
    a) hart verhandeln,
    b) überzogene Forderungen stellen;
    he drives a hard bargain auch mit ihm ist nicht gut Kirschen essen
    14. ein Gewerbe (zielbewusst) (be)treiben
    15. einen Tunnel etc bohren, vortreiben
    16. besonders Tennis, Golf: den Ball driven
    C v/i
    1. (dahin)treiben, (dahin)getrieben werden:
    drive before the wind vor dem Wind treiben
    2. rasen, brausen, jagen, stürmen
    3. a) (Auto) fahren, chauffieren, einen oder den Wagen steuern
    b) kutschieren:
    can you drive? können Sie (Auto) fahren?;
    he drove into a wall er fuhr gegen eine Mauer;
    drive above the speed limit das Tempolimit überschreiten
    4. (spazieren) fahren
    5. sich gut etc fahren lassen:
    6. besonders Tennis, Golf: driven, einen Treibschlag spielen
    7. zielen (at auf akk): → let1 Bes Redew
    8. ab-, hinzielen ( beide:
    at auf akk):
    what is he driving at? worauf will er hinaus?, was meint oder will er eigentlich?
    9. schwer arbeiten (at an dat)
    * * *
    1. noun
    1) Fahrt, die

    a nine-hour drive, a drive of nine hours — eine neunstündige Autofahrt

    2) (street) Straße, die
    3) (private road) Zufahrt, die; (entrance to large building) Auffahrt, die
    4) (energy to achieve) Tatkraft, die
    5) (Commerc., Polit., etc.): (vigorous campaign) Aktion, die; Kampagne, die

    export/sales/recruiting drive — Export- / Verkaufs- / Anwerbekampagne, die

    6) (Psych.) Trieb, der
    7) (Motor Veh.): (position of steering wheel)

    left-hand/right-hand drive — Links-/Rechtssteuerung od. -lenkung, die

    8) (Motor Veh., Mech. Engin.): (transmission of power) Antrieb, der

    front-wheel/rear-wheel drive — Front-/Heckantrieb, der

    2. transitive verb,
    1) fahren [Auto, Lkw, Route, Strecke, Fahrgast]; lenken [Kutsche, Streitwagen]; treiben [Tier]

    drive a lorry/train — Lkw-Fahrer/Lokomotivführer sein

    3) (compel to move) vertreiben

    drive somebody out of or from a place/country — jemanden von einem Ort/aus einem Land vertreiben

    4) (chase, urge on) treiben [Vieh, Wild]
    5) (fig.)

    drive somebody out of his mind or wits — jemanden in den Wahnsinn treiben

    6) [Wind, Wasser:] treiben
    8) (power) antreiben [Mühle, Maschine]

    be steam-driven or driven by steam — dampfgetrieben sein

    9) (incite to action) antreiben

    drive oneself [too] hard — sich [zu sehr] schinden

    3. intransitive verb,
    drove, driven

    drive at 30 m.p.h. — mit 50 km/h fahren

    learn to drive — [Auto]fahren lernen; den Führerschein machen (ugs.)

    2) (go by car) mit dem [eigenen] Auto fahren
    3) [Hagelkörner, Wellen:] schlagen
    Phrasal Verbs:
    * * *
    (computers) n.
    Laufwerk -e n. n.
    Antrieb -e m.
    Aussteuerung f.
    Drang ¨-e m.
    Fahrt -en f.
    Fahrweg -e m.
    Schwung -¨e m.
    Steuerung f.
    Trieb -e m.
    Triebwerk n. (sink) into the ground expr.
    in den Boden bohren ausdr. v.
    (§ p.,p.p.: drove, driven)
    = ansteuern v.
    antreiben v.
    fahren v.
    (§ p.,pp.: fuhr, ist/hat gefahren)
    lenken v.
    treiben v.
    (§ p.,pp.: trieb, getrieben)

    English-german dictionary > drive

  • 4 Health

       Although public health has improved considerably in the past two decades, and there has been a greater rate of improvement in this area since the Revolution of 25 April 1974, severe public health problems continue to plague Portugal. The death rate has decreased and life expectancy has increased (in 1989-90, life expectancy was about 71 for males and 78 for females, and by 2000 this had increased), but public health problems in Portugal continue to be severe; statistics especially in rural Portugal were typical of many poor countries. Recent improvements in the health picture include an improved medical educational system, better medical technology, and an increased number of doctors and medical personnel. There has also been some increase in the number of hospitals (in 1975, there were 229 hospitals and, in 1990, 239) and the number of beds available for patients. Basic health knowledge in the general population, however, remains low, especially in rural areas. Traditionally, medical resources continue to be most available in the major cities of Lisbon, Oporto, and Coimbra.
       Along with increased migration from Portugal's former colonies and with European Union membership and its concomitant freer traffic across land frontiers, there has been an increase in the numbers of human immunodeficiency virus/acquired immune deficiency (HIV/AIDS) cases. Although not on the scale of some other Western European or North African countries, Portugal's HIV/AIDS situation has aroused national concern.
       An important sign of improving health care is that, as more women enter professional fields, more women choose to become doctors. Observers note that public health and medical improvements remain closely linked to reforms in education and better living conditions in both urban and rural areas where substandard housing, sanitation facilities, hygiene, and clean water supplies remain persistent problems.

    Historical dictionary of Portugal > Health

  • 5 Ellehammer, Jacob Christian Hansen

    SUBJECT AREA: Aerospace
    [br]
    b. 14 June 1871 South Zealand, Denmark
    d. b. 20 May 1946 Copenhagen, Denmark
    [br]
    Danish inventor who took out some four hundred patents for his inventions, including aircraft.
    [br]
    Flying kites as a boy aroused Ellehammer's interest in aeronautics, and he developed a kite that could lift him off the ground. After completing an apprenticeship, he started his own manufacturing business, whose products included motor cycles. He experimented with model aircraft as a sideline and used his mo tor-cycle experience to build an aero engine during 1903–4. It had three cylinders radiating from the crankshaft, making it, in all probability, the world's first air-cooled radial engine. Ellehammer built his first full-size aircraft in 1905 and tested it in January 1906. It ran round a circular track, was tethered to a central mast and was unmanned. A more powerful engine was needed, and by September Ellehammer had improved his engine so that it was capable of lifting him for a tethered flight. In 1907 Ellehammer produced a new five-cylinder radial engine and installed it in the first manned tri-plane, which made a number of free-flight hops. Various wing designs were tested and during 1908–9 Ellehammer developed yet another radial engine, which had six cylinders arranged in two rows of three. Ellehammer's engines had a very good power-to-weight ratio, but his aircraft designs lacked an understanding of control; consequently, he never progressed beyond short hops in a straight line. In 1912 he built a helicopter with contra-rotating rotors that was a limited success. Ellehammer turned his attention to his other interests, but if he had concentrated on his excellent engines he might have become a major aero engine manufacturer.
    [br]
    Bibliography
    1931, Jeg fløj [I Flew], Copenhagen (Ellehammer's memoirs).
    Further Reading
    C.H.Gibbs-Smith, 1965, The Invention of the Aeroplane 1799–1909, London (contains concise information on Ellehammer's aircraft and their performance).
    J.H.Parkin, 1964, Bell and Baldwin, Toronto (provides more detailed descriptions).
    JDS

    Biographical history of technology > Ellehammer, Jacob Christian Hansen

  • 6 Guinand, Pierre Louis

    [br]
    b. 20 April 1748 Brenets, Neuchâtel, Switzerland
    d. 13 February 1824 Brenets, Neuchâtel, Switzerland
    [br]
    Swiss optical glassmaker.
    [br]
    Guinand received little formal education and followed his father's trade of joiner. He specialized in making clock cases, but after learning how to cast metals he took up the more lucrative work of making watch cases. When he was about 20 years old, in a customer's house he caught sight of an English telescope, a rarity in a Swiss mountain village. Intrigued, he obtained permission to examine it. This aroused his interest in optical matters and he began making spectacles and small telescopes.
    Achromatic lenses were becoming known, their use being to remove the defect of chromatic aberration or coloured optical images, but there remained defects due to imperfections in the glass itself. Stimulated by offers of prizes by scientific bodies, including the Royal Society of London, for removing these defects, Guinand set out to remedy them. He embarked in 1784 on a long and arduous series of experiments, varying the materials and techniques for making glass. The even more lucrative trade of making bells for repeaters provided the funds for a furnace capable of holding 2 cwt (102 kg) of molten glass. By 1798 or so he had succeeded in making discs of homogeneous glass. He impressed the famous Parisian astronomer de Lalande with them and his glass became well enough known for scientists to visit him. In 1805 Fraunhofer persuaded Guinand to join his optical-instrument works at Benediktheurn, in Bavaria, to make lenses. After nine years, Guinand returned to Brenets with a pension, on condition he made no more glass and disclosed no details of his methods. After two years these conditions had become irksome and he relinquished the pension. On 19 February 1823 Guinand described his discoveries in his classic "Memoir on the making of optical glass, more particularly of glass of high refractive index for use in the production of achromatic lenses", presented to the Société de Physique et d'Histoire Naturelle de Genève. This gives details of his experiments and investigations and discusses a suitable pot-clay stirrer and stirring mechanism for the molten glass, with temperature control, to overcome optical-glass defects such as bubbles, seeds, cords and colours. Guinand was hailed as the man in Europe who had achieved this and has thus rightly been called the founder of the era of optical glassmaking.
    [br]
    Further Reading
    The fullest account in English of Guinand's life and work is 'Some account of the late M. Guinand and of the discovery made by him in the manufacture of flint glass for large telescopes by F.R., extracted from the Bibliothèque Universelle des Sciences, trans.
    C.F.de B.', Quart.J.Sci.Roy.Instn.Lond. (1825) 19: 244–58.
    M.von Rohr, 1924, "Pierre Louis Guinand", Zeitschrift für Instr., 46:121, 139, with an English summary in J.Glass. Tech., (1926) 10: abs. 150–1.
    LRD

    Biographical history of technology > Guinand, Pierre Louis

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