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AIR TWIST [3 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2017-04-27

English

Subject field(s)
  • Ornamental Glassware
  • Glass Manufacturing
DEF

A twist in which is embedded one or several twisted columns of air.

OBS

Its origin and development are essentially English. It was one of the earliest styles of decorating stems, dating from c. 1735 to c. 1770.

French

Domaine(s)
  • Verrerie d'art
  • Fabrication du verre
CONT

Il suffit d'introduire des bulles d'air, suivant un dessin régulier, dans un bloc de verre pâteux, et ensuite d'étirer et de tordre [...] les bulles s'allongent indéfiniment jusqu'à former un réseau de tubulures presque capillaires. À l'œil, le filigrane d'air apparaît argenté.

Spanish

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Record 2 2013-07-26

English

Subject field(s)
  • Aerodynamics and Theory of Gases
  • Electric Rotary Machines - Types
  • Wind Energy
CONT

Twist. The tips of a WT [wind turbine] blade move through the air faster than the roots in the direction of rotation, but the oncoming wind speed is similar at all points along the blade. Hence, to achieve the optimal angle of attack along its length, a WT blade is twisted so that the pitch of the blade reduces from the root to the tip.

French

Domaine(s)
  • Théorie des gaz et aérodynamique
  • Machines tournantes électriques - types
  • Énergie éolienne
DEF

Géométrie d'une pale d'éolienne dont la conformation hélicoïdale permet une réduction du pas, du pied à l'extrémité, permettant ainsi d'optimiser l'angle d'attaque.

Spanish

Campo(s) temático(s)
  • Aerodinámica y teoría de los gases
  • Máquinas rotativas eléctricas - tipos
  • Energía eólica
Save record 2

Record 3 2006-09-25

English

Subject field(s)
  • Thread Spinning (Textiles)
  • Textiles: Preparation and Processing
DEF

A system of staple-fibre spinning which utilises air to apply the twisting couple to the yarn during its formation.

OBS

The air is blown through small holes arranged tangentially to the yarn surface and this causes the yarn to rotate. The majority of systems using this technique produce fasciated yarns, but by using two air jets operating in opposing twist directions it is possible to produce yarns with more controlled properties but of more complex structure.

French

Domaine(s)
  • Filature (Textiles)
  • Apprêt et traitements divers (Textiles)
CONT

[...] le Tribunal était d'avis que les fils cardés et les fils peignés produits par filature à fibres libérées et par filature à jet d'air n'étaient pas substituables aux fils en question.

Spanish

Save record 3

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