C - Chemistry – Metallurgy – 03 – B
Patent
C - Chemistry, Metallurgy
03
B
C03B 29/02 (2006.01) F23D 99/00 (2010.01) C03B 23/043 (2006.01) C03B 37/018 (2006.01)
Patent
CA 2064110
A glass tube (31) from which optical fiber is to be drawn is heated by a torch assembly comprising a plurality of nozzles (54-54) disposed on a carriage. In order to avoid contamination of the tube by particles of the torch assembly resulting from thermal degradation, the nozzles are disposed in a plane which is normal to an axis (36) of the tube with each nozzle axis inclined so that flame fronts associated with the nozzles are substantially closer to the tube than to the torch assembly. Reaction of materials which are flowed into the tube is enhanced by including a second row of nozzles (91-91) which are inclined within a plane which is inclined to the longitudinal axis of the tube. In order to collapse the tube into a rod, a muffle member (100) preferably is caused to be disposed about the tube with an opening in the periphery of the muffle member to allow portions of the gas flows to converge and to allow heat energy to be transferred from the flame fronts to the tube.
Un tube de verre (31) destiné à l'étirage pour la production d'une fibre optique est chauffé par un ensemble brûleur constitué d'une pluralité de buses (54-54) montées sur un support mobile. Dans le but d'éviter la contamination du tube par les particules issues de la dégradation thermique qui pourrait survenir au niveau de l'ensemble brûleur, les buses de chauffage sont disposées sur un plan normal par rapport à l'axe (36) du tube, mais inclinées de manière à porter le front de flamme plus près du tube que de l'ensemble brûleur. La réaction des matières circulant à l'intérieur du tube est amplifiée par la présence d'une deuxième série de buses (91-91) montées sur un plan incliné par rapport à l'axe longitudinal du tube. La réduction du diamètre du tube de verre est assurée par un moufle qui, disposé à la périphérie du tube, présente une ouverture à sa partie inférieure pour permettre le passage de gaz chauds et du front de flamme.
D'annessa Anthony Thomas
Elliott Ray Stahl
Haney Eugene Andrew
American Telephone And Telegraph Company
Kirby Eades Gale Baker
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