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21 Perkins, Jacob
[br]b. 9 July 1766 Newburyport, Massachusetts, USAd. 30 July 1849 London, England[br]American inventor of a nail-making machine and a method of printing banknotes, investigator of the use of steam at very high pressures.[br]Perkins's occupation was that of a gold-and silversmith; while he does not seem to have followed this after 1800, however, it gave him the skills in working metals which he would continue to employ in his inventions. He had been working in America for four years before he patented his nail-making machine in 1796. At the time there was a great shortage of nails because only hand-forged ones were available. By 1800, other people had followed his example and produced automatic nail-making machines, but in 1811 Perkins' improved machines were introduced to England by J.C. Dyer. Eventually Perkins had twenty-one American patents for a range of inventions in his name.In 1799 Perkins invented a system of engraving steel plates for printing banknotes, which became the foundation of modern siderographic work. It discouraged forging and was adopted by many banking houses, including the Federal Government when the Second United States Bank was inaugurated in 1816. This led Perkins to move to Philadelphia. In the intervening years, Perkins had improved his nail-making machine, invented a machine for graining morocco leather in 1809, a fire-engine in 1812, a letter-lock for bank vaults and improved methods of rolling out spoons in 1813, and improved armament and equipment for naval ships from 1812 to 1815.It was in Philadelphia that Perkins became interested in the steam engine, when he met Oliver Evans, who had pioneered the use of high-pressure steam. He became a member of the American Philosophical Society and conducted experiments on the compressibility of water before a committee of that society. Perkins claimed to have liquified air during his experiments in 1822 and, if so, was the real discoverer of the liquification of gases. In 1819 he came to England to demonstrate his forgery-proof system of printing banknotes, but the Bank of England was the only one which did not adopt his system.While in London, Perkins began to experiment with the highest steam pressures used up to that time and in 1822 took out his first of nineteen British patents. This was followed by another in 1823 for a 10 hp (7.5 kW) engine with only 2 in. (51 mm) bore, 12 in. (305 mm) stroke but a pressure of 500 psi (35 kg/cm2), for which he claimed exceptional economy. After 1826, Perkins abandoned his drum boiler for iron tubes and steam pressures of 1,500 psi (105 kg/cm2), but the materials would not withstand such pressures or temperatures for long. It was in that same year that he patented a form of uniflow cylinder that was later taken up by L.J. Todd. One of his engines ran for five days, continuously pumping water at St Katherine's docks, but Perkins could not raise more finance to continue his experiments.In 1823 one his high-pressure hot-water systems was installed to heat the Duke of Wellington's house at Stratfield Saye and it acquired a considerable vogue, being used by Sir John Soane, among others. In 1834 Perkins patented a compression ice-making apparatus, but it did not succeed commercially because ice was imported more cheaply from Norway as ballast for sailing ships. Perkins was often dubbed "the American inventor" because his inquisitive personality allied to his inventive ingenuity enabled him to solve so many mechanical challenges.[br]Further ReadingHistorical Society of Pennsylvania, 1943, biography which appeared previously as a shortened version in the Transactions of the Newcomen Society 24.D.Bathe and G.Bathe, 1943–5, "The contribution of Jacob Perkins to science and engineering", Transactions of the Newcomen Society 24.D.S.L.Cardwell, 1971, From Watt to Clausius. The Rise of Thermodynamics in the Early Industrial Age, London: Heinemann (includes comments on the importance of Perkins's steam engine).A.F.Dufton, 1940–1, "Early application of engineering to warming of buildings", Transactions of the Newcomen Society 21 (includes a note on Perkins's application of a high-pressure hot-water heating system).RLH -
22 Stanhope, Charles, 3rd Earl
[br]b. 3 August 1753 London, Englandd. 15 December 1816 Chevening, Kent, England[br]English politician, scientist and inventor.[br]Stanhope's schooling at Eton was interrupted in 1764 when the family moved to Geneva; there, he soon showed a talent for scientific pursuits. In 1771 he contributed a paper on the pendulum to the Swedish Academy, which awarded him a prize for it. After his return to London in 1774, he threw himself into politics, earning himself not only a reputation for promoting the liberty of the individual, but also unpopularity for championing the French Revolution.Stanhope is best known for his inventions in printing. In 1800 he introduced the first successful iron press, known by his name. Its iron frame enabled a whole forme to be printed at one pull, thus speeding up production. The press retained the traditional screw but incorporated a system of levers which increased the pressure on the platen up to the moment of contact with the type, so that fine, sharp impressions were obtained and the work of the pressman was made easier. Stanhope's process for moulding and reproducing formes, known as stereotyping, became important when curved formes were required for cylinder presses. His invention of logotypes for casting type, however, proved a failure. Throughout his political activities, Stanhope devoted time and money to scientific and mechanical matters. Of these, the development of steamships is noteworthy. He took out patents in 1790 and 1807, and in 1796 he constructed the Kent for the Admiralty, but it was unsuccessful. In 1810, however, he claimed that a vessel 110 ft (33.5 m) long and 7 ft (2.1 m) in draught "outsailed the swiftest vessels in the Navy".[br]Further ReadingG.Stanhope, 1914, The Life of Charles, Third Earl Stanhope, London.H.Hart, 1966, Charles Earl Stanhope and the Oxford University Press, London: Printing Historical Society (a reprint of a paper, originally published in 1896, describing Stanhope's printing inventions; with copious quotations from Stanhope's own writings, together with an essay on the Stanhope press by James Moran).LRDBiographical history of technology > Stanhope, Charles, 3rd Earl
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23 Dickinson, John
SUBJECT AREA: Paper and printing[br]b. 29 March 1782d. 11 January 1869 London, England[br]English papermaker and inventor of a papermaking machine.[br]After education at a private school, Dickinson was apprenticed to a London stationer. In 1806 he started in business as a stationer, in partnership with George Longman; they transferred to 65 Old Bailey, where the firm remained until their premises were destroyed during the Second World War. In order to secure the supply of paper and be less dependent on the papermakers, Dickinson turned to making paper on his own account. In 1809 he acquired Apsley Mill, near Hemel Hempstead on the river Gade in Hertfordshire. There, he produced a new kind of paper for cannon cartridges which, unlike the paper then in use, did not smoulder, thus reducing the risk of undesired explosions. The new paper proved very useful during the Napoleonic War.Dickinson developed a continuous papermaking machine about the same time as the Fourdrinier brothers, but his worked on a different principle. Instead of a continuous flat wire screen, Dickinson used a wire-covered cylinder which dipped into the dilute pulp as it revolved. A felt-covered roller removed the layer of wet pulp, which was then subjected to drying, as in the Fourdrinier machine. The latter was first in use at Frogmore, just upstream from Apsley Mill on the river Gade. Dickinson patented his machine in 1809 and claimed that it was superior for some kinds of paper. In feet, both types of machine have survived, in much enlarged and modified form: the Fourdrinier for general papermaking, the Dickinson cylinder for the making of board. In 1810 Dickinson acquired the nearby Nash Mill, and over the years he extended the scope of his papermaking business, introducing many technical improvements. Among his inventions was a machine to paste together continuous webs of paper to form cardboard. Another, patented in 1829, was a process for incorporating threads of cotton, flax or silk into the body of the paper to make forgery more difficult. He became increasingly prosperous, overcoming labour disputes with unemployed hand-papermakers. and lawsuits against a canal company which threatened the water supply to his mills. Dickinson was the first to use percolation gauges to predict river flow, and his work on water supply brought him election to a Fellowship of the Royal Society in 1845.[br]Principal Honours and DistinctionsFRS 1845.Further ReadingR.H.Clapperton, 1967, The Paper-making Machine, Oxford: Pergamon Press, pp. 331–5 (provides a biography and full details of Dickinson's inventions).LRD -
24 plancha
f.1 iron.pasar la plancha a algo to give something a quick ironodio la plancha I hate ironingesas camisas necesitan una plancha those shirts need ironingplancha de vapor steam iron2 grill.a la plancha grilled3 plate (placa).4 boob, blunder (informal) (metedura de pata).5 dangerous tackle.6 plate (Imprenta).7 electric iron, smoothing iron.8 hotplate, griddle.9 embarrassment.10 boner.pres.indicat.3rd person singular (él/ella/ello) present indicative of spanish verb: planchar.imperat.2nd person singular (tú) Imperative of Spanish verb: planchar.* * *1 (de metal) plate, sheet3 (placa de cocina) griddle, hotplate5 (al saltar al agua) belly flop; (en fútbol) diving header6 (de imprenta) plate\a la plancha grilledhacer una plancha familiar to boob, make a boob* * *noun f.1) iron2) grill* * *SF1) (=lámina) plate, sheet; (=losa) slab; (Tip) plate; (Náut) gangway; (Med) dental platehacer la plancha — [bañista] to float
2) (=utensilio) iron; (=acción) ironing; [de traje] pressing; (=ropa para planchar) ironingplancha a o de vapor — steam iron
3) (Culin) grill; Cono Sur griddle pan4) (=ejercicio) press-up5) * (=error) bloomer *hacer o tirarse una plancha — to drop a clanger **, put one's foot in it
6) (Dep) dive* * *1)a) ( electrodoméstico) ironb) ( acto) ironing; ( ropa para planchar) ironing2)a) (Const, Tec) sheetb) (Impr) platec) (Chi) ( con inscripción) plaque3) ( utensilio) griddle; ( parte de la cocina) hotplate, griddle4) ( en natación)5)a) (fam) ( metedura de pata) boo-boo (colloq), boob (colloq)tirarse una plancha — (Esp fam) to put one's foot in it (colloq), to goof (colloq)
b) (Chi fam) ( vergüenza) embarrassmentqué plancha pasé! — I was o felt so embarrassed!
* * *1)a) ( electrodoméstico) ironb) ( acto) ironing; ( ropa para planchar) ironing2)a) (Const, Tec) sheetb) (Impr) platec) (Chi) ( con inscripción) plaque3) ( utensilio) griddle; ( parte de la cocina) hotplate, griddle4) ( en natación)5)a) (fam) ( metedura de pata) boo-boo (colloq), boob (colloq)tirarse una plancha — (Esp fam) to put one's foot in it (colloq), to goof (colloq)
b) (Chi fam) ( vergüenza) embarrassmentqué plancha pasé! — I was o felt so embarrassed!
* * *plancha11 = flat-iron, iron.Ex: As with all electrical devices, be cautious when using blow-dryers and flat-irons around water and/or children.
Ex: She was arrested and charged with burning her 11-year-old daughter with an iron.* plancha de la ropa = flat-iron.* plancha de vapor = steam iron.* remate en plancha = diving header.* tabla de la plancha = ironing board.plancha22 = griddle, hotplate.Ex: The griddle is ready when a few drops of water sprinkled on it form fast-moving bubbles
.Ex: This range of hotplates covers a variety of sizes in cast iron and aluminium on request.* a la plancha = griddled, on the griddle, on the hotplate.* asar a la plancha = griddle.* filete a la plancha = griddled steak.* hacer una plancha a partir de un molde = cast + plate + from mould.* impresión en plancha de madera = woodblock printing.* litografía en plancha de zinc = zinc-plate lithograph.* número de plancha = plate number.* plancha cilíndrica = plate cylinder.* plancha de cobre para la impresión en huecograbado = intaglio copperplate.* plancha de cocinar = griddle, hotplate.* plancha de estereotipia = stereotype plate.* plancha de impresión = plate, printing plate.* plancha de impresión de cobre = copperplate.* plancha de impresión de latón = pewter plate.* plancha de impresión en relieve de cobre = engraved copper plate.* plancha de impresión litográfica = lithographic plate.* plancha del techo = ceiling tile.* plancha de madera = wood block [woodblock].* plancha de moqueta = carpet tile.* plancha de zinc = zinc plate.* plancha eléctrica = electric hotplate.* plancha eléctrica de cocinar = electric hotplate.* plancha para hacer gofres = waffle iron.* plancha xilográfica = relief woodcut.* plancha zincográfica = zincograph.* preparar a la plancha = griddle.plancha33 = boner.Ex: Inferencing skills can be learned as students clarify contextual meanings of ambiguous statements, mispronunciations, and boners that may be found in newspaper headlines, texts, and conversations.
* tirarse una placha = make + a bloomer.* tirarse una plancha = put + Posesivo + foot in it, put + Posesivo + foot in + Posesivo + mouth, stick + Posesivo + foot in it, drop + a clanger, drop + a bollock, make + a blunder, blunder.* * *A1 (electrodoméstico) ironpásale la plancha run the iron over it, iron it, give it an iron2 (acto) ironingesa camisa no necesita plancha that shirt doesn't need ironing3 (ropa para planchar) ironingCompuestos:steam ironelectric ironBacero en planchas sheet steeluna pared revestida con planchas de madera a wood-paneled wall2 ( Impr) plate3 ( Chi) (con una inscripción) plaqueCompuesto:plancha de vela or de windsurfsailboard, windsurferC (utensilio) griddle; (parte de la cocina) hotplate, griddleun filete a la plancha a grilled steakD(en natación): hacer la plancha to floatE¡qué plancha pasé! I was o felt so embarrassed!* * *
Del verbo planchar: ( conjugate planchar)
plancha es:
3ª persona singular (él/ella/usted) presente indicativo2ª persona singular (tú) imperativo
Multiple Entries:
plancha
planchar
plancha sustantivo femenino
1
( ropa para planchar) ironing
2a) (Const, Tec) sheetb) (Impr) plate
3 ( utensilio de cocina) griddle;
4
planchar ( conjugate planchar) verbo transitivo ‹sábana/mantel› to iron;
‹ pantalones› to press, iron;
‹ traje› to press
verbo intransitivo ( con la plancha) to do the ironing
plancha sustantivo femenino
1 (para ropa) iron
2 (para alimentos) grill, griddle
planchar verbo transitivo to iron
' plancha' also found in these entries:
Spanish:
hacer
- hoja
- horror
- montaña
- odiar
- vapor
- calentar
- chapa
- estirar
- lámina
- pasar
- placa
- planchar
- quemar
English:
blow
- drip-dry
- griddle
- hotplate
- iron
- gang
- plate
- press
- service
- sheet
* * *plancha nf1. [aparato para planchar] iron;pasar la plancha a algo to give sth a quick iron;odio la plancha I hate ironing;esas camisas necesitan una plancha those shirts need ironingplancha de vapor steam iron2. [ropa planchada] ironing3. [para cocinar] grill;a la plancha grilled4. [placa] plate;[de madera] sheet6. [en fútbol] dangerous tackle [with studs showing];entrar en plancha to go in studs first7. Imprenta plate9. RP, Ven [lista] slate, ticketser una plancha to be a pain in the neck;darle plancha a alguien to stand sb up;pegarse plancha to get a nasty shock* * *fno precisa plancha it doesn’t need ironing2 en cocina broiler, Brgrill;a la plancha broiled, Br grilled3 de metal sheet5 TIP plate* * *plancha nf1) : iron, ironing2) : grill, griddlea la plancha: grilled3) : sheet, plateplancha para hornear: baking sheet* * *plancha n1. (para planchar) iron2. (para cocinar) grill -
25 cut
1. резка, разрезка; рубка; высечка; резать, разрезать, нарезать, обрезатьcut set — разрез; сечение
2. отрезанный лист3. вырезка; сокращать, урезатьa cut from the joint — вырезка, филей
4. гравюра; гравировать5. выгравированная линия6. клише7. оттиск с клише8. ослабление9. выемка на переднем обрезеto cut down — отрезать, нарезать на части
to cut off — отрезать, обрезать
calender cuts — морщины, образующиеся при каландрировании
10. штриховая гравюра11. штриховое клише -
26 Theophilus Presbyter
[br]fl. late eleventh/early twelfth century[br]German author of the most detailed medieval treatise relating to technology.[br]The little that is known of Theophilus is what can be inferred from his great work, De diversis artibus. He was a Benedictine monk and priest living in north-west Germany, probably near an important art centre. He was an educated man, conversant with scholastic philosophy and at the same time a skilled, practising craftsman. Even his identity is obscure: Theophilus is a pseudonym, possibly for Roger of Helmarshausen, for the little that is known of both is in agreement.Evidence in De diversis suggests that it was probably composed during 1110 to 1140. White (see Further Reading) goes on to suggest late 1122 or early 1123, on the grounds that Theophilus only learned of St Bernard of Clairvaulx's diatribe against lavish church ornamentation during the writing of the work, for it is only in the preface to Book 3 that Theophilus seeks to justify his craft. St Bernard's Apologia can be dated late 1122. No other medieval work on art combines the comprehensive range, orderly presentation and attention to detail as does De diversis. It has been described as an encyclopedia of medieval skills and crafts. It also offers the best and often the only description of medieval technology, including the first direct reference to papermaking in the West, the earliest medieval account of bell-founding and the most complete account of organ building. Many metallurgical techniques are described in detail, such as the making of a crucible furnace and bloomery hearth.The treatise is divided into three books, the first on the materials and art of painting, the second on glassmaking, including stained glass, glass vessels and the blown-cylinder method for flat glass, and the final and longest book on metalwork, including working in iron, copper, gold and silver for church use, such as chalices and censers. The main texts are no mere compilations, but reveal the firsthand knowledge that can only be gained by a skilled craftsman. The prefaces to each book present perhaps the only medieval expression of an artist's ideals and how he sees his art in relation to the general scheme of things. For Theophilus, his art is a gift from God and every skill an act of praise and piety. Theophilus is thus an indispensable source for medieval crafts and technology, but there are indications that the work was also well known at the time of its composition and afterwards.[br]BibliographyThe Wolfenbuttel and Vienna manuscripts of De diversis are the earliest, both dating from the first half of the twelfth century, while the British Library copy, in an early thirteenth-century hand, is the most complete. Two incomplete copies from the thirteenth century held at Cambridge and Leipzig offer help in arriving at a definitive edition.There are several references to De diversis in sixteenth-century printed works, such as Cornelius Agrippa (1530) and Josias Simmler (1585). The earliest printed edition ofDe diversis was prepared by G.H.Lessing in 1781 with the title, much used since, Diversarium artium schedula.There are two good recent editions: Theophilus: De diversis artibus. The Various Arts, 1964, trans. with introd. by C.R.Dodwell, London: Thomas Nelson, and On Diverse Arts. The Treatise of Theophilus, 1963, trans. with introd. and notes by J.G.Harthorne and C.S.Smith, Chicago University Press.Further ReadingLynn White, 1962, "Theophilus redivivus", Technology and Culture 5:224–33 (a comparative review of Theophilus (op. cit.) and On Diverse Arts (op. cit.)).LRD -
27 impression
impression [ɪm'preʃən](a) (impact → on person, mind, feelings) impression f;∎ to make a good/bad impression (on) faire bonne/mauvaise impression (sur);∎ he made a strong impression on them il leur a fait une forte impression;∎ he always tries to make an impression il essaie toujours d'impressionner les gens;∎ my words made no impression on him whatsoever mes paroles n'ont eu absolument aucun effet sur lui;∎ they got a good impression of my brother mon frère leur a fait bonne impression(b) (idea, thought) impression f;∎ to create or give the impression that… donner ou produire l'impression que…;∎ I don't know where she got that impression from je ne sais pas où elle est allée chercher ça;∎ you should never trust first impressions il ne faut pas se fier aux premières impressions;∎ it's my impression or I have the impression that she's rather annoyed with us j'ai l'impression qu'elle est en colère contre nous;∎ what were your impressions of Tokyo? quelles ont été vos impressions de Tokyo?;∎ I was under the impression that you were unable to come j'étais persuadé que vous ne pouviez pas venir(c) (mark, imprint) marque f, empreinte f;∎ to take an impression of sth prendre l'empreinte ou l'impression de qch;∎ impression cylinder cylindre m de rotative(e) (impersonation) imitation f;∎ to do impressions faire des imitations;∎ she does a very good impression of the Queen elle imite très bien la reine
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