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1 Bouchon, Basile
SUBJECT AREA: Textiles[br]fl. c.1725 Lyon, France[br]French pioneer in automatic pattern selection for weaving.[br]In the earliest draw looms, the pattern to be woven was selected by means of loops of string that were loosely tied round the appropriate leashes, which had to be lifted to make that pick of the pattern by raising the appropriate warp threads. In Isfahan, Persia, looms were seen in the 1970s where a boy sat in the top of the loom. Before the weaver could weave the next pick, the boy selected the appropriate loop of string, pulled out those leashes which were tied in it and lifted them up by means of a forked stick. The weaver below him held up these leashes by a pair of wooden sticks and sent the shuttle through that shed while the boy was sorting out the next loop of string with its leashes. When the pick had been completed, the first loop was dropped further down the leashes and, presumably, when the whole sequence of that pattern was finished, all the loops had be pushed up the leashes to the top of the loom again.Models in the Conservatoire National des Arts et Métiers, Paris, show that in 1725 Bouchon, a worker in Lyon, dispensed with the loops of string and selected the appropriate leashes by employing a band of pierced paper pressed against a row of horizontal wires by the drawboy using a hand-bar so as to push forward those which happened to lie opposite the blank spaces. These connected with loops at the lower extremity of vertical wires linked to the leashes at the top of the loom. The vertical wires could be pulled down by a comb-like rack beside the drawboy at the side of the loom in order to pull up the appropriate leashes to make the next shed. Bouchon seems to have had only one row of needles or wires, which must have limited the width of the patterns. This is an early form of mechanical memory, used in computers much later. The apparatus was improved subsequently by Falcon and Jacquard.[br]Further ReadingA.Barlow, 1878, The History and Principles of Weaving by Hand and by Power, London (a brief description of Bouchon's apparatus).M.Daumas (ed.), 1968, Histoire générale des techniques Vol. III: L'Expansion dumachinisme, Paris (a description of this apparatus, with a diagram). Conservatoire National des Arts et Métiers, 1942, Catalogue du musée, section T, industries textiles, teintures et apprêts, Paris (another brief description; a model can be seen in this museum).C.Singer, (ed.), 1957, A History of Technology, Vol. III, Oxford: Clarendon Press (provides an illustration of Bouchon's apparatus).RLH -
2 pitch
pitch [pɪtʃ]∎ figurative she found herself pitched into the political arena elle se trouva propulsée dans l'arène politique;∎ he pitched a great game last night (in baseball) il a très bien joué hier soir∎ I can't pitch my voice any higher je n'arrive pas à chanter dans un ton ou un registre plus aigu;∎ the music was pitched too high/low for her le ton était trop haut/bas pour elle∎ we must pitch the price at the right level il faut fixer le prix au bon niveau;∎ our prices are pitched too high nos prix sont trop élevés;∎ he pitched his speech at the level of the man in the street son discours était à la portée de l'homme de la rue, il avait rendu son discours accessible à l'homme de la rue;∎ stories pitched at older children histoires écrites pour des enfants plus âgés(d) (set up → camp) établir;∎ let's pitch camp here établissons notre camp ou dressons nos tentes ici;∎ to pitch wickets (in cricket) planter ou dresser les guichets(a) (fall over) tomber;∎ he pitched into the water il est tombé dans l'eau;∎ to pitch headlong tomber la tête la première;∎ the passengers pitched forwards/backwards les passagers ont été projetés en avant/en arrière(b) (bounce → ball) pitcher(d) (in baseball → player) lancer, être lanceur;∎ American familiar figurative to be in there pitching y mettre du sien□(e) (slope → roof) être incliné;∎ the roof pitches sharply le toit est fortement incliné(g) (in golf → player) pitcher;∎ she pitched to within three feet of the hole elle a pitché à moins d'un mètre du trou3 noun∎ the pitch of his voice grew higher and higher sa voix devint de plus en plus aiguë;∎ to give the orchestra the pitch donner le ton à l'orchestre;∎ to rise in pitch monter de ton∎ a high pitch of excitement was reached l'excitation était presque à son comble;∎ how did their relationship reach such a pitch? comment leurs relations ont-elles pu se détériorer à ce point?;∎ the suspense was at its highest pitch le suspense était à son comble∎ rugby pitch terrain m de rugby(d) (act of throwing) lancer m, lancement m;∎ the ball went full pitch through the window la balle passa à travers la vitre sans rebondir∎ the salesman's pitch le boniment du vendeur(g) (slope → of roof) pente f, inclinaison f; (→ of staircase) pente f, rampant m; Technology (→ of plane) inclinaison f, basile f(h) (movement → of boat, aircraft) tangage m;∎ angle of pitch angle m de tangage(i) Technology (of rivets, holes) espacement m, écartement m; (of screw, cogwheel, rotor) pas m; Typography (of characters) pas m(m) (in climbing) longueur f∎ to make a pitch for sth jeter son dévolu sur qch□ ;∎ he made a pitch at her il lui a fait du plat, il a essayé de la draguer►► pitch angle angle m de tangage;pitch circle cercle m primitif; (of wheel) ligne f d'engrènement;pitch mark (in golf) pitch m;pitch pine pitchpin m;Music pitch pipe diapason m (sifflet)(start work) s'attaquer au travail; (lend a hand) donner un coup de main;∎ everybody is expected to pitch in on attend de chacun qu'il mette la main à la pâte(attack) s'en prendre à;∎ to pitch into a task se mettre à une tâche;∎ they pitched into the meal ils ont attaqué le repaschoisir, opter pour -
3 Textiles
See also: INDEX BY SUBJECT AREA[br]Dore, Samuel GriswoldHeilmann, JosuéLevers, JohnLister, Samuel CunliffeMa JunSong Yingxing
См. также в других словарях:
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