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  • 21 Wollaston, William Hyde

    SUBJECT AREA: Metallurgy
    [br]
    b. 6 August 1766 East Dereham, Norfolk, England
    d. 22 December 1828 London, England
    [br]
    English chemist and metallurgist who discovered palladium and rhodium, pioneer in the fabrication of platinum.
    [br]
    Wollaston qualified in medicine at Cambridge University but gave up his practice in 1800 to devote himself to chemistry and metallurgy, funded from the profits from making malleable platinum. In partnership with Smithson Tennant, a friend from his Cambridge days, he worked on the extraction of platinum by dissolving it in aqua regia. In 1802 he found that in addition to platinum the solution contained a new metal, which he named palladium. Two years later he identified another new metal, rhodium.
    Wollaston developed a method of forming platinum by means of powder metallurgy and was the first to produce malleable and ductile platinum on a commercial scale. He produced platinum vessels for sulphuric acid manufacture and scientific apparatus such as crucibles. He devised an elegant method for forming fine platinum wire. He also applied his inventive talents to improving scientific apparatus, including the sextant and microscope and a reflecting goniometer for measuring crystal angles. In 1807 he was appointed Joint Secretary of the Royal Society with Sir Humphry Davy, which entailed a heavy workload and required them to referee all the papers submitted to the Society for publication.
    Wollaston's output of platinum began to decline after 1822. Due to ill health he ceased business operations in 1828 and at last made public the details of his secret platinum fabrication process. It was fully described in the Bakerian Lecture he delivered to the Royal Society on 28 November 1828, shortly before his death.
    [br]
    Principal Honours and Distinctions
    FRS 1793.
    Bibliography
    His scientific papers were published in various journals, nearly all listed in the Royal Society Catalogue of Scientific Papers.
    Further Reading
    There is no good general biography, the best general account being the entry in
    Dictionary of Scientific Biography.
    D.McDonald, 1960, A History of Platinum from the Earliest Times to the Eighteen- Eighties, London (provides a good discussion of his work on platinum).
    M.E.Weeks, 1939, "The discovery of the elements", Journal of Chemical Education: 184–5.
    ASD

    Biographical history of technology > Wollaston, William Hyde

  • 22 קטף

    קָטַף(b. h.; cmp. קטע, קטל, a. גדף) to cut, break off, pluck. Lam. R. to I, 12, v. עוֹלֵלָה.Part. pass. קָטוּף; f. קְטוּפָה. Ber.47a; Tosef.Meg.IV (III), 27, a. e. אמן ק׳, v. infra.Pirké dR. El. ch. XXIX עוללות קְטוּפִין premature (undeveloped) grapes. Nif. נִקְטָף, Hithpa. הִתְקטֵּף to be plucked, broken off. Tosef. l. c. העונה אמן … קטופה יִקָּטְפוּ שנותיו he who pronounces a broken Amen (v. אָמֵן II), his years shall be broken off; Ber. l. c. יִתְקַטְּפוּ; Y. ib. VIII, end, 12c תִּקָּטֵף נשמתו his soul shall be plucked off (he shall die before his time). Pl. קִיטֵּף 1) same. Esth. R. to I, 9, v. עוֹלֵלָה.Esp. ק׳ בעוללות ( to do plucking among the small single bunches, to initiate persecution with attempts to destroy the young generation. Gen. R. s. 42 הראשון התחיל מְקַטֵּף בע׳וכ׳ the first enemy began with breaking off the young bunches, the second with thinning the clusters (v. זִּנֵּב) ; Lev. R. s. 11; Ruth R. introd. ( ושם האיש).Nidd.66b בנתר משום דמקטף she must not wash her head with natron, because it plucks (uproots) the weakly rooted hairs (which left on the head prevent the water from immediate contact with the body; v. חוּץ); a. fr.Trnsf. (of fire) to creep along the ground of a field, opp. קָדַח. Y.B. Kam.VI, 5c top במְקַטֶּפֶת (Bab. ib. 61a בנכפפת), v. קָדַח. 2) to tear in pieces a lump of dough to form cakes, for which purpose the kneader moistens his hands with water, oil ; hence: to form dough and smoothen its surface. Y.Pes.II, end, 29c אין לשין … אבל מְקַטְּפִיןוכ׳ you must not knead unleavened bread (for the Passover night) with liquors (juice of fruit, oil) but you may form it with liquors; Bab. ib. 36a. Ib. את שלשין בו מקטפין בו only such liquid as may be used for kneading, should be used for forming. Ib. 42a אחד שמְקַטֶּפֶתוכ׳ one vessel in which she dips her hand when forming the cakes, and another ; a. e.Part. pass. מְקוּטָּף; f. מְקוּטֶּפֶת broken off, nipped Midr. Till. to Ps. 73:4 האשה … אחת מק׳ ואחת מעוכה ed. Bub. (ed. מעוסה, corr. acc.) when a woman spins a yarn, once a thread is broken (and must be knotted), and once it is rubbed off (crumbled, too thin). Gen. R. s. 99 יצא … ואזניו מק׳ Reuben came forth with his ears clipped (his pride humbled); (comment.: his ears hanging down like a nipped plant, i. e. saddened).

    Jewish literature > קטף

  • 23 קָטַף

    קָטַף(b. h.; cmp. קטע, קטל, a. גדף) to cut, break off, pluck. Lam. R. to I, 12, v. עוֹלֵלָה.Part. pass. קָטוּף; f. קְטוּפָה. Ber.47a; Tosef.Meg.IV (III), 27, a. e. אמן ק׳, v. infra.Pirké dR. El. ch. XXIX עוללות קְטוּפִין premature (undeveloped) grapes. Nif. נִקְטָף, Hithpa. הִתְקטֵּף to be plucked, broken off. Tosef. l. c. העונה אמן … קטופה יִקָּטְפוּ שנותיו he who pronounces a broken Amen (v. אָמֵן II), his years shall be broken off; Ber. l. c. יִתְקַטְּפוּ; Y. ib. VIII, end, 12c תִּקָּטֵף נשמתו his soul shall be plucked off (he shall die before his time). Pl. קִיטֵּף 1) same. Esth. R. to I, 9, v. עוֹלֵלָה.Esp. ק׳ בעוללות ( to do plucking among the small single bunches, to initiate persecution with attempts to destroy the young generation. Gen. R. s. 42 הראשון התחיל מְקַטֵּף בע׳וכ׳ the first enemy began with breaking off the young bunches, the second with thinning the clusters (v. זִּנֵּב) ; Lev. R. s. 11; Ruth R. introd. ( ושם האיש).Nidd.66b בנתר משום דמקטף she must not wash her head with natron, because it plucks (uproots) the weakly rooted hairs (which left on the head prevent the water from immediate contact with the body; v. חוּץ); a. fr.Trnsf. (of fire) to creep along the ground of a field, opp. קָדַח. Y.B. Kam.VI, 5c top במְקַטֶּפֶת (Bab. ib. 61a בנכפפת), v. קָדַח. 2) to tear in pieces a lump of dough to form cakes, for which purpose the kneader moistens his hands with water, oil ; hence: to form dough and smoothen its surface. Y.Pes.II, end, 29c אין לשין … אבל מְקַטְּפִיןוכ׳ you must not knead unleavened bread (for the Passover night) with liquors (juice of fruit, oil) but you may form it with liquors; Bab. ib. 36a. Ib. את שלשין בו מקטפין בו only such liquid as may be used for kneading, should be used for forming. Ib. 42a אחד שמְקַטֶּפֶתוכ׳ one vessel in which she dips her hand when forming the cakes, and another ; a. e.Part. pass. מְקוּטָּף; f. מְקוּטֶּפֶת broken off, nipped Midr. Till. to Ps. 73:4 האשה … אחת מק׳ ואחת מעוכה ed. Bub. (ed. מעוסה, corr. acc.) when a woman spins a yarn, once a thread is broken (and must be knotted), and once it is rubbed off (crumbled, too thin). Gen. R. s. 99 יצא … ואזניו מק׳ Reuben came forth with his ears clipped (his pride humbled); (comment.: his ears hanging down like a nipped plant, i. e. saddened).

    Jewish literature > קָטַף

  • 24 técnica

    f.
    1 technique, skill, expertise, know-how.
    2 procedure, method.
    * * *
    1 (tecnología) technique, technology
    2 (habilidad) technique, method
    3 (ingeniería) engineering
    * * *
    1. f., (m. - técnico) 2. noun f.
    skill, technique
    3. f., (m. - técnico)
    * * *
    SF
    1) (=método) technique
    2) (=tecnología) technology
    3) (=destreza) skill
    técnico
    * * *
    1)
    a) ( método) technique
    b) ( destreza) skill
    2) ( tecnología) technology
    3) ( en baloncesto) technical foul
    * * *
    = approach [approaches, -pl.], know-how, mechanics, skill, technique, technic.
    Ex. During the last twenty years the variety of approaches to the organisation of knowledge has proliferated with the introduction of computer-based methods.
    Ex. What was lacking, however, was the know-how for forming and running such groups.
    Ex. However, it is clear that the mechanics of searching post-coordinate indexes differ from those involved in searching pre-coordinate indexes.
    Ex. However, successful human free language indexing is very dependent upon the skills of the individual indexer.
    Ex. Improvements in document delivery services (DDS) via the further application of techniques such as facsimile transmission will also have an important role to play.
    Ex. The technic of automatic indexing indicates a list of key-words (simple and compound words) to an expert in a given field.
    ----
    * arte y técnica de escribir obras de teatro = playwriting.
    * desarrollar una técnica = develop + skill, build + skill.
    * dominar una técnica = master + technique.
    * técnica analítica = analytical technique.
    * técnica bibliométrica = bibliometric technique.
    * técnica bibliotecaria = library technique.
    * técnica cluster = clustering technique.
    * técnica convolucionista = convolution technique.
    * técnica de apoyo = enabling skill.
    * técnica de audio simultáneo = audio streaming.
    * técnica de búsqueda automatizada = computer-searching technique.
    * técnica de construcción = construction technique.
    * técnica de diseño = design technique.
    * técnica de encuadernación = binding technique.
    * técnica de fabricación = construction technique.
    * técnica de grupo nominal = nominal group technique.
    * técnica de incidencias = critical incident technique.
    * técnica de investigación = research technique.
    * técnica Delphi, la = Delphi technique, the.
    * técnica de mercado = merchandising technique.
    * técnica de navegación = navigational technique.
    * técnica de recuperación de información por coincidencia óptima = best match technique.
    * técnica de recuperación por medio de la lógica difusa = fuzzy IR technique.
    * técnica de repografía = reprography technique.
    * técnica de vídeo simultáneo = video streaming.
    * técnica documental = document-handling technique.
    * técnicas de composición escrita = writing skills.
    * técnicas de estudio = study skills.
    * técnicas de proyección = forecasting techniques.
    * técnicas de redacción = writing skills.
    * * *
    1)
    a) ( método) technique
    b) ( destreza) skill
    2) ( tecnología) technology
    3) ( en baloncesto) technical foul
    * * *
    = approach [approaches, -pl.], know-how, mechanics, skill, technique, technic.

    Ex: During the last twenty years the variety of approaches to the organisation of knowledge has proliferated with the introduction of computer-based methods.

    Ex: What was lacking, however, was the know-how for forming and running such groups.
    Ex: However, it is clear that the mechanics of searching post-coordinate indexes differ from those involved in searching pre-coordinate indexes.
    Ex: However, successful human free language indexing is very dependent upon the skills of the individual indexer.
    Ex: Improvements in document delivery services (DDS) via the further application of techniques such as facsimile transmission will also have an important role to play.
    Ex: The technic of automatic indexing indicates a list of key-words (simple and compound words) to an expert in a given field.
    * arte y técnica de escribir obras de teatro = playwriting.
    * desarrollar una técnica = develop + skill, build + skill.
    * dominar una técnica = master + technique.
    * técnica analítica = analytical technique.
    * técnica bibliométrica = bibliometric technique.
    * técnica bibliotecaria = library technique.
    * técnica cluster = clustering technique.
    * técnica convolucionista = convolution technique.
    * técnica de apoyo = enabling skill.
    * técnica de audio simultáneo = audio streaming.
    * técnica de búsqueda automatizada = computer-searching technique.
    * técnica de construcción = construction technique.
    * técnica de diseño = design technique.
    * técnica de encuadernación = binding technique.
    * técnica de fabricación = construction technique.
    * técnica de grupo nominal = nominal group technique.
    * técnica de incidencias = critical incident technique.
    * técnica de investigación = research technique.
    * técnica Delphi, la = Delphi technique, the.
    * técnica de mercado = merchandising technique.
    * técnica de navegación = navigational technique.
    * técnica de recuperación de información por coincidencia óptima = best match technique.
    * técnica de recuperación por medio de la lógica difusa = fuzzy IR technique.
    * técnica de repografía = reprography technique.
    * técnica de vídeo simultáneo = video streaming.
    * técnica documental = document-handling technique.
    * técnicas de composición escrita = writing skills.
    * técnicas de estudio = study skills.
    * técnicas de proyección = forecasting techniques.
    * técnicas de redacción = writing skills.

    * * *
    A
    1 (método) technique
    2 (habilidad, destreza) skill
    conduce con mucha técnica she's a very skilful driver
    B (tecnología) technology
    avances de la técnica advances in technology
    Compuestos:
    electronic technology
    hydraulic technology
    C (en baloncesto) technical foul
    * * *

     

    técnica sustantivo femenino
    1


    2 ( tecnología) technology
    3 ( en baloncesto) technical foul
    técnico,-a
    I adjetivo technical
    un problema técnico, a technical hitch
    II sustantivo masculino y femenino technician, technical expert
    técnica sustantivo femenino
    1 (método) technique
    2 (tecnología) technology
    ' técnica' also found in these entries:
    Spanish:
    calcografía
    - carrera
    - ensayar
    - escala
    - ficha
    - grabada
    - grabado
    - imprenta
    - inédita
    - inédito
    - inventar
    - ITV
    - maravilla
    - novedosa
    - novedoso
    - relojería
    - revista
    - tela
    - vídeo
    - aplicación
    - asistencia
    - dotar
    - fotografía
    - medio
    - modernizar
    English:
    carbon dating
    - mastery
    - oil painting
    - skill
    - technique
    - coach
    - extensively
    - manager
    * * *
    1. [procedimiento] technique;
    en Florencia aprendió la técnica pictórica del fresco in Florence he learned the fresco technique;
    tiene mucha técnica she has very good technique, she's very skilful
    técnicas de reproducción asistida assisted reproduction techniques;
    técnicas de venta sales techniques
    2. [tecnología] technology;
    los grandes avances de la técnica great advances in technology
    3. [en baloncesto] technical foul;
    el árbitro le pitó una técnica al entrenador the referee blew the whistle for a technical foul by the trainer
    * * *
    f
    1 technique
    2 en baloncesto: infracción technical foul
    * * *
    1) : technique, skill
    2) : technology
    * * *
    técnica n technique

    Spanish-English dictionary > técnica

  • 25 गोत्र


    gó-trá
    n. ( trai) protection orᅠ shelter for cows, cow-pen, cow-shed, stable for cattle, stable (in general), hurdle, enclosure RV. (once m. VIII, 50, 10);

    « family enclosed by the hurdle»,
    family, race, lineage, kin ChUp. ṠāṇkhṠr. Kauṡ. etc.
    (a polysyllabic fem. in ī shortens this vowel before gotra in comp. <e.g.. brāhmaṇigotrā,
    « a Brāhman woman only by descent orᅠ name» Kāṡ. > Pāṇ. 6-3, 43 ff.);
    the family name ĀṡvGṛ. MBh. XIII, 548 VarBṛS. ;
    name (in general) Ṡak. VI, 5 Ragh. etc.. ;
    (in Gr.) the grandson andᅠ his descendants if no older offspring of the same ancestor than this grandson lives
    (if the son lives the grandson is called yuvan)
    Pāṇ. 2-4, 63; IV, 1, 89 ff. and 162 ff.; 2, 111 and 3, 80 and 126 ;
    an affix used for forming a patr. L. ;
    a tribe, subdivision (in the Brāhman caste 49 Gotras are reckoned andᅠ supposed to be sprung from andᅠ named after celebrated teachers, as Ṡāṇḍilya, Kaṡyapa, Gautama, Bharad-vāja, etc.) W. ;
    a genus, class, species W. ;
    a multitude L. ;
    increase L. ;
    possession L. ;
    a forest L. ;
    a field L. ;
    an umbrella orᅠ parasol L. ;
    knowledge of probabilities L. ;
    (am) ind. after a verb denoting repetition andᅠ implying a blame Pāṇ. 8-1, 27 and 57 ;
    ( eṇa) instr. ind. with regard to one's family name gaṇa prakṛity-ādi;
    m. a mountain (a meaning probably derived fr. - bhíd) BhP. II, III, VI ;
    a cloud (cf. - bhíd) Naigh. I, 10 ;
    a road L. ;
    (ā) f. a herd of kine Pāṇ. 4-2, 51 ;
    the earth L. (cf. gotrêṡa);
    - kartṛi m. the founder of a family MBh. XIII, 248 ;
    - kārin mfn. founding a family Pravar. ;
    - kīlā f. (= acala-k-) the earth L. ;
    - kshānti f. N. of a Kiṃnara virgin Kāraṇḍ. I ;
    - ja mfn. born in the same family, relation (in law, nearly = « Gentile» of Roman law, andᅠ applied to kindred of the same general family, who are connected by offerings of food andᅠ water;
    hence opposed to bandhu orᅠ cognate kindred not partaking in the offerings to common ancestors)
    Yājñ. II, 135 BhP. III, 7, 24 Kathās. VI, XXII, IIC ;
    - devatā f. family deity Siṇhâs. IV ;
    - nāman n. the family name ṠāṇkhGṛ. I, 6, 4 ;
    - paṭa m. a genealogical table, pedigree Lāṭy. I, 2, 24 Sch. ;
    - pravara-dīpa, - ra-nirṇaya m. - ramañjarī f. N. of wks.;
    - bhāj mfn. belonging to the family Gaut. XXVIII, 33 ;
    - bhíd mfn. opening the cow-pens of the sky (« splitting the clouds orᅠ mountains» Sāy. ;
    said of Indra andᅠ Bṛihaspati's vehicle) RV. II, 23, 3; VI, 17, 2 and X, 103, 6 VS. XX, 38 ;
    m. « splitting the mountains (with his thunderbolt cf. adri-bhíd)», Indra Ragh. Kum. II, 52 ;
    « Indra» andᅠ « destroyer of families» Rājat. I, 92 ;
    « Indra» andᅠ « destroyer of names» Ṡiṡ. IX, 80 ;
    - bhūmi f. « family-range», one of the periods in a Ṡrāvaka's life Buddh. L. ;
    - maya mfn. forming a family (with kshātra, « a Kshatriya family») Bālar. III, 60 ;
    - riktha n. du. the family name andᅠ the inheritance Mn. IX, 142 ;
    -rikthâ̱ṉṡa, in comp. the family name andᅠ part of the inheritance, 165;
    - vat mfn. belonging to a noble family R. II, 98, 24 ;
    - vardhana m. N. of a prince Kathās. LXV ;
    - vṛiksha m. N. of a tree Bhpr. ;
    - vrata n. a family rule Bhartṛ. (Mudr. II, 18 Subh.) ;
    - sthiti f. id. andᅠ « standing like a mountain» ;
    -trâ̱khyā f. family name, patronymic L. ;
    -trâ̱di, a Gaṇa of Pāṇ. 8-1, 27 ;
    -trâ̱nta m. « destruction of families» andᅠ « destruction of mountains» Rājat. V, 377 ;
    (scil. ṡabda) « ending with a Gotra affix», a patronymic L. ;
    -trâ̱bhidhāyam ind. so as to name one's name Bhaṭṭ. III, 50 ;
    - trêṡa m. « earth-lord», a king;
    - trôccāra m. « recitation of the family pedigree»
    N. of a ceremony RTL. p. 407.

    Sanskrit-English dictionary > गोत्र

  • 26 עריכה

    עֲרִיכָהf. (עָיַךְ) arranging, ranging; rolling ( bread); use of the stem ערך. Y.Yoma II, end, 40a נאמר כאן ע׳וכ׳ the verb ʿarakh is used here (Lev. 1:7) Y.Snh.X, 29a top עֲרִיכָתוֹ the forming of the show-bread. Y.Sabb.VII, 10b bot. על לישתה ועל עֲרִיכָתָהּוכ׳ for kneading it, for forming it and for baking it; a. fr.Tanḥ. Bḥuck. 6 עֲרִיכַת גיהנם (prob. to be read: עֲרוּכַת, v. עֲרוּכָה) the pile of the fire of Gehenna (ref. to עדוך, Is. 30:33).Yalk. Ps. 662 פת עריכה, v. עָרַךְ.

    Jewish literature > עריכה

  • 27 עֲרִיכָה

    עֲרִיכָהf. (עָיַךְ) arranging, ranging; rolling ( bread); use of the stem ערך. Y.Yoma II, end, 40a נאמר כאן ע׳וכ׳ the verb ʿarakh is used here (Lev. 1:7) Y.Snh.X, 29a top עֲרִיכָתוֹ the forming of the show-bread. Y.Sabb.VII, 10b bot. על לישתה ועל עֲרִיכָתָהּוכ׳ for kneading it, for forming it and for baking it; a. fr.Tanḥ. Bḥuck. 6 עֲרִיכַת גיהנם (prob. to be read: עֲרוּכַת, v. עֲרוּכָה) the pile of the fire of Gehenna (ref. to עדוך, Is. 30:33).Yalk. Ps. 662 פת עריכה, v. עָרַךְ.

    Jewish literature > עֲרִיכָה

  • 28 conocimiento técnico

    (n.) = know-how, technical knowledge
    Ex. What was lacking, however, was the know-how for forming and running such groups.
    Ex. The benchtests in the journals are, generally speaking, more objective though they can rarely assess long-term reliability and in most cases assume a degree of technical knowledge.
    * * *
    (n.) = know-how, technical knowledge

    Ex: What was lacking, however, was the know-how for forming and running such groups.

    Ex: The benchtests in the journals are, generally speaking, more objective though they can rarely assess long-term reliability and in most cases assume a degree of technical knowledge.

    Spanish-English dictionary > conocimiento técnico

  • 29 Dobby Machines

    These are exceedingly useful machines for forming the shed in weaving, since they can be used for both simple and complicated weaves. There are many types in use, most of which are negative acting in so far as they only lift the healds, springs being used beneath the healds to bring them down again after being lifted by the dobby. In the cotton trade 16 up 20 jacks is usual. Dobbies in common use are known as single lift, double lift, negative, positive, open shed, closed shed, and crossborder. Single Lift - In this type there is a single knife or griffe in use to raise the heald stave. The whole of the shafts return to their original position after each pick. A fresh selection of staves to be raised is made for each pick. Looms fitted with this dobby run slower than others, about 140 picks per minute. Double Lift - These machines are fitted with double selecting and lifting parts which move at half the speed of the loom. They give an open or semi-open shed. The speed of the loom is considerably more than for the single-lift type. Crossborder - This machine is used when headings or a change of weave is required as for bordered handkerchiefs, serviettes, towels, etc. Positive - Dobby machines which make an open shed and positively lift and depress the heald staves as required by the design. Negative - Dobbies which only lift the heald staves, and require springs or other means to move the staves to the bottom position. Centre Shed - Every thread of the warp is moved for every new shed. The shed opens from the middle. Some healds ascend and the others descend. Closed Shed - So termed because all the warp threads are brought to one level after each succeeding pick as in single-lift machines. Open Shed - The type generally used for automatic looms, also the double-lift machines. After a heald stave is lifted it remains up until it is required to be down again. The warp threads constantly form two lines, upper and lower, and the only changes are when threads move from line to the other. Semi-open Shed - This shed has a stationary bottom line, and to make changes, threads pass from the top to the bottom, or from the bottom to the top. The threads which remain up for more than one pick in succession only fall halfway and then go to the top again.

    Dictionary of the English textile terms > Dobby Machines

  • 30 пресс для листовой штамповки

    Универсальный русско-английский словарь > пресс для листовой штамповки

  • 31 Cort, Henry

    SUBJECT AREA: Metallurgy
    [br]
    b. 1740 Lancaster, England
    d. 1800 Hampstead, near London, England
    [br]
    English ironmaster, inventor of the puddling process and grooved rollers for forming iron into bars.
    [br]
    His father was a mason and brickmaker but, anxious to improve himself, Cort set up in London in 1765 as a navy agent, said to have been a profitable business. He recognized that, at that time, the conversion of pig iron to malleable or wrought iron, which was needed in increasing quantities as developments in industry and mechanical engineering gathered pace, presented a bottleneck in the ironmaking process. The finery hearth was still in use, slow and inefficient and requiring the scarce charcoal as fuel. To tackle this problem, Cort gave up his business and acquired a furnace and slitting mill at Fontley, near Fareham in Hampshire. In 1784 he patented his puddling process, by which molten pig iron on the bed of a reverberatory furnace was stirred with an iron bar and, by the action of the flame and the oxygen in the air, the carbon in the pig iron was oxidized, leaving nearly pure iron, which could be forged to remove slag. In this type of furnace, the fuel and the molten iron were separated, so that the cheaper coal could be used as fuel. It was the stirring action with the iron bar that gave the name "puddling" to the process. Others had realized the problem and reached a similar solution, notably the brothers Thomas and George Cranage, but only Cort succeeded in developing a commercially viable process. The laborious hammering of the ball of iron thus produced was much reduced by an invention of the previous year, 1783. This too was patented. The iron was passed between grooved rollers to form it into bars. Cort entered into an agreement with Samuel Jellico to set up an ironworks at Gosport to exploit his inventions. Samuel's father Adam, Deputy Paymaster of the Navy, advanced capital for this venture, Cort having expended much of his own resources in the experimental work that preceded his inventions. However, it transpired that Jellico senior had, unknown to Cort, used public money to advance the capital; the Admiralty acted to recover the money and Cort lost heavily, including the benefits from his patents. Rival ironmasters were quick to pillage the patents. In 1790, and again the following year, Cort offered unsuccessfully to work for the military. Finally, in 1794, at the instigation of the Prime Minister, William Pitt the Younger, Cort was paid a pension of £200 per year in recognition of the value of his improvements in the technology of ironmaking, although this was reduced by deductions to £160. After his death, the pension to his widow was halved, while some of his children received a pittance. Without the advances made by Cort, however, the iron trade could not have met the rapidly increasing demand for iron during the industrial revolution.
    [br]
    Bibliography
    1787, A Brief State of Facts Relative to the New Method of Making Bar Iron with Raw Pit Coal and Grooved Rollers (held in the Science Museum Library archive collection).
    Further Reading
    H.W.Dickinson, 1941, "Henry Cort's bicentary", Transactions of the Newcomen Society 21: 31–47 (there are further references to grooved rollers and the puddling process in Vol. 49 of the same periodical (1978), on pp. 153–8).
    R.A.Mott, 1983, Henry Con, the Great Finery Creator of Puddled Iron, Sheffield: Historical Metallurgy Society.
    LRD

    Biographical history of technology > Cort, Henry

  • 32 Mannesmann, Reinhard

    SUBJECT AREA: Metallurgy
    [br]
    b. 13 May 1856 Remscheid, Bleidinghausen, Germany
    d. 22 February 1922 Remscheid, Bleidinghausen, Germany
    [br]
    German metallurgical engineer.
    [br]
    Reinhard Mannesmann and his four brothers developed the engineering works at Remscheid that had been founded by their father. With his brother Max, Reinhard devised c. 1885 a method of producing seamless tubes by a rolling process. Factories for manufacturing tubes by this process were established at Remscheid, at Bous in the Saar district and at Komotau in Bohemia. Further developments of the process were patented by the brothers in the years following the initial patent of 1885. The British patent rights for the Mannesmann process were purchased by the Landore Siemens Steel Company in 1888, and the Mannesmann Tube Company was established at Landore in South Wales. This company went into liquidation in 1899 after ten years of production and the Tube Works was then purchased by the Mannesmann family, and a new company, the British Mannesmann Tube Company, was formed. Reinhard and Max Mannesmann took up residence near the Landore works and the business prospered so that by 1914 Landore was employing 1,500 men and producing 35,000 tons of tubing each year. The company was taken over during the First World War by the Custodian of Enemy Property, and after the war a new tube works which had been planned in 1914 was built at Newport, Monmouthshire. The Mannesmann family were able to resume control in 1926 for some ten years, but in 1938 the company became part of the Stewarts \& Lloyds organization.
    [br]
    Further Reading
    G.Evans, 1934, Manufacture of Seamless Tubes Ferrous and Non-Ferrous, London; 1940, Proceedings of the Institution of Mechanical Engineers 143:62–3 (both provide technical details of the Mannesmann process for forming seamless tubes).
    RTS

    Biographical history of technology > Mannesmann, Reinhard

  • 33 Root, Elisha King

    [br]
    b. 10 May 1808 Ludlow, Massachusetts, USA
    d. 31 August 1865 Hartford, Connecticut, USA
    [br]
    American mechanical engineer and inventor.
    [br]
    After an elementary education, Elisha K.Root was apprenticed as a machinist and worked in that occupation at Ware and Chicopee Falls, Massachusetts. In 1832 he went to Collinsville, Connecticut, to join the Collins Company, manufacturers of axes. He started as a lathe hand but soon became Foreman and, in 1845, Superintendent. While with the company, he devised and patented special-purpose machinery for forming axes which transformed the establishment from a primitive workshop to a modern factory.
    In 1849 Root was offered positions by four different manufacturers and accepted the post of Superintendent of the armoury then being planned at Hartford, Connecticut, by Samuel Colt for the manufacture of his revolver pistol, which he had invented in 1835. Initial acceptance of the revolver was slow, but by the mid1840s Colt had received sufficient orders to justify the establishment of a new factory and Root was engaged to design and install the machinery. The principle of interchangeable manufacture was adopted, and Root devised special machines for boring, rifling, making cartridges, etc., and a system of jigs, fixtures, tools and gauges. One of these special machines was a drop hammer that he invented and patented in 1853 and which established the art of die-forging on a modern basis. He was also associated with F.A. Pratt in the design of the "Lincoln" milling machine in 1855.
    When Colt died in 1862, Root became President of the company and continued in that capacity until his own death. It was said that he was one of the ablest and most highly paid mechanics from New England and that he was largely responsible for the success of both the Collins and the Colt companies.
    [br]
    Further Reading
    J.W.Roe, 1916, English and American Tool Builders, New Haven; reprinted 1926, New York, and 1987, Bradley, Ill. (describes Root's work at the Colt Armory).
    Paul Uselding, 1974, "Elisha K.Root, Forging, and the “American System”", "Elisha K.Root, forging, and the “American System”", Technology and Culture 15:543–68 (provides further biographical details, his work with the Collins Company and a list of his patents).
    RTS

    Biographical history of technology > Root, Elisha King

  • 34 حرف

    حَرْف \ character: a kind of mark, sign, etc. used for a number or a letter; a kind of handwriting: These are printed characters. Arabic characters are formed from right to left. \ حَرْف (أو صوت) لِين \ vowel: a speech sound made with the open mouth, not using teeth, lips or tongue; a letter expressing such a sound: The main English vowels are a, e, i, o, u. \ حَرْف جَرّ \ preposition: a word like from or into. \ حَرْف ساكِن أو صامِت (في اللُّغَة)‏ \ consonant: (a letter which stands for) a sound which is not a vowel (such as b, d, k, s, f, etc.). \ حَرْف عَطْف \ conjunction: a word that joins others (such as and, but, or). \ حَرْف عِلَّة \ vowel: a speech sound made with the open mouth, not using teeth, lips or tongue; a letter expressing such a sound: The main English vowels are a, e, i, o, u. \ حَرْف كَبير \ capital letter,: the large form of a letter in English, such as A,C,Q. \ حَرْف من حروف الأبجدية \ letter: a sign (A, B, C, etc.) that is used for forming words.

    Arabic-English dictionary > حرف

  • 35 grammar

    'ɡræmə
    1) (the rules for forming words and for combining words to form sentences: He's an expert on French grammar.) gramática
    2) (a description or collection of the rules of grammar: Could you lend me your Latin grammar?; (also adjective) a grammar book.) gramática
    3) (a person's use of grammatical rules: This essay is full of bad grammar.) gramática
    - grammatically
    - grammar school

    grammar n gramática
    tr['græməSMALLr/SMALL]
    1 gramática
    \
    SMALLIDIOMATIC EXPRESSION/SMALL
    grammar school SMALLBRITISH ENGLISH/SMALL instituto de enseñanza secundaria (para alumnos de cierto nivel académico)
    grammar ['græmər] n
    : gramática f
    adj.
    de gramática adj.
    n.
    gramática s.f.
    'græmər, 'græmə(r)
    a) u gramática f
    b) c grammar (book) gramática f
    ['ɡræmǝ(r)]
    1. N
    2) (also: grammar book) libro m de gramática
    2.
    CPD

    grammar school N(Brit) instituto m de segunda enseñanza (al que se accede a través de pruebas selectivas)

    GRAMMAR SCHOOL En el Reino Unido, una grammar school es un centro estatal de educación secundaria selectiva que proporciona formación especialmente dirigida a los alumnos que vayan a continuar hasta una formación universitaria. Normalmente no son centros mixtos y para entrar en ellos se exige un examen escrito. Debido a la introducción en los años sesenta y setenta de las comprehensive schools para las que no hace falta una prueba de acceso, hoy día quedan pocas grammar schools, aunque sí que continúa el debate sobre si la calidad de la educación en estos centros es mejor o si solo sirven para favorecer el elitismo en la enseñanza.
    See:
    see cultural note COMPREHENSIVE SCHOOLS in comprehensive
    * * *
    ['græmər, 'græmə(r)]
    a) u gramática f
    b) c grammar (book) gramática f

    English-spanish dictionary > grammar

  • 36 Grammatik

    f; -, -en
    1. grammar
    2. Buch: grammar (book)
    * * *
    die Grammatik
    grammar
    * * *
    Gram|mạ|tik [gra'matɪk]
    f -, -en
    grammar; (= Grammatikbuch) grammar (book)
    * * *
    die
    1) (the rules for forming words and for combining words to form sentences: He's an expert on French grammar.) grammar
    2) (a description or collection of the rules of grammar: Could you lend me your Latin grammar?; ( also adjective) a grammar book.) grammar
    3) (a person's use of grammatical rules: This essay is full of bad grammar.) grammar
    * * *
    Gram·ma·tik
    <-, -en>
    [graˈmatɪk]
    f
    1. (Teil der Sprachwissenschaft) grammar
    2. (Lehrbuch der Grammatik) grammar [book]
    3. PHILOS, LING (gesetzmäßige Struktur) framework
    * * *
    die; Grammatik, Grammatiken
    2) (Lehrbuch) grammar [book]
    * * *
    Grammatik f; -, -en
    1. grammar
    2. Buch: grammar (book)
    * * *
    die; Grammatik, Grammatiken
    2) (Lehrbuch) grammar [book]
    * * *
    f.
    grammar n.

    Deutsch-Englisch Wörterbuch > Grammatik

  • 37 grammar

    noun
    (also book) Grammatik, die

    something is bad grammar — etwas ist grammat[ikal]isch nicht richtig od. korrekt

    * * *
    ['ɡræmə]
    1) (the rules for forming words and for combining words to form sentences: He's an expert on French grammar.) die Grammatik
    2) (a description or collection of the rules of grammar: Could you lend me your Latin grammar?; ( also adjective) a grammar book.) die Grammatik, Grammatik-...
    3) (a person's use of grammatical rules: This essay is full of bad grammar.) die Grammatik
    - academic.ru/32007/grammatical">grammatical
    - grammatically
    - grammar school
    * * *
    gram·mar
    [ˈgræməʳ, AM -ɚ]
    I. n
    1. no pl (rules) Grammatik f
    to be good/bad \grammar grammatikalisch richtig/falsch sein
    2. (book) Grammatik f
    II. n modifier (lesson, mistake, rule) Grammatik-
    * * *
    ['grmə(r)]
    n
    1) (= subject, book) Grammatik f, Sprachlehre f

    his grammar is excellentseine Grammatik ist fehlerfrei

    2)
    See:
    = grammar school
    * * *
    grammar [ˈɡræmə(r)] s
    1. Grammatik f (auch Lehrbuch):
    it is bad grammar es ist schlechter Sprachgebrauch oder grammatisch nicht richtig;
    he knows his grammar er beherrscht seine Sprache
    2. fig (Werk n über die) Grundbegriffe pl:
    the grammar of politics die Grundbegriffe oder Grundzüge der Politik
    * * *
    noun
    (also book) Grammatik, die

    something is bad grammar — etwas ist grammat[ikal]isch nicht richtig od. korrekt

    * * *
    n.
    Grammatik f.

    English-german dictionary > grammar

  • 38 grammar

    'ɡræmə
    1) (the rules for forming words and for combining words to form sentences: He's an expert on French grammar.) grammatikk
    2) (a description or collection of the rules of grammar: Could you lend me your Latin grammar?; ( also adjective) a grammar book.) grammatikk(bok)
    3) (a person's use of grammatical rules: This essay is full of bad grammar.) språkbruk
    - grammatically
    - grammar school
    grammatikk
    subst. \/ˈɡræmə\/
    1) grammatikk
    2) språkvitenskap
    3) språkbruk
    4) grunnleggende kunnskap
    5) grammatikkbok
    bad grammar dårlig språkbruk
    be grammar ( hverdagslig) være korrekt, være grammatisk riktig
    is that grammar?

    English-Norwegian dictionary > grammar

  • 39 grammar

    ['ɡræmə]
    1) (the rules for forming words and for combining words to form sentences: He's an expert on French grammar.) málfræði
    2) (a description or collection of the rules of grammar: Could you lend me your Latin grammar?; ( also adjective) a grammar book.) málfræðibók
    3) (a person's use of grammatical rules: This essay is full of bad grammar.) málnotkun
    - grammatically
    - grammar school

    English-Icelandic dictionary > grammar

  • 40 grammar

    nyelvtan
    * * *
    ['ɡræmə]
    1) (the rules for forming words and for combining words to form sentences: He's an expert on French grammar.) nyelvtan
    2) (a description or collection of the rules of grammar: Could you lend me your Latin grammar?; ( also adjective) a grammar book.) nyelvtan
    3) (a person's use of grammatical rules: This essay is full of bad grammar.) nyelvhelyesség
    - grammatically
    - grammar school

    English-Hungarian dictionary > grammar

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