C - Chemistry – Metallurgy – 03 – B
Patent
C - Chemistry, Metallurgy
03
B
C03B 37/029 (2006.01) C03B 37/025 (2006.01) E04C 3/42 (2006.01) H05B 6/02 (2006.01) H05B 6/36 (2006.01)
Patent
CA 2083858
An induction furnace 2 for reflowing a portion of an optical preform 10 in order to draw a lightguide fiber 12 therefrom. The furnace 2 has an axially located tubular iridium susceptor 42 which is centrally disposed within a beaker 36 and a sleeve is positioned concentrically around the susceptor 42. The sleeve 48 is surrounded by an insulating grain 46. A high frequency coil 50 is energized to couple its electromagnetic field to the iridium susceptor 42 to heat and reflow a portion of the preform 10 in order to draw the fiber 12 therefrom. The furnace housing 20 is sealed to provide an inert, non-oxidizing atmosphere for the iridium susceptor 42.
Four à induction (2) pour la fabrication de fibres optiques (12) à partir de préformes (10), comportant un suscepteur en iridium (42) de forme tubulaire, disposé dans l'axe du four dans un récipient (36) et entouré d'une enveloppe (48), elle-même entourée d'une gaine isolante (46). Une bobine d'induction haute fréquence (50) transfert son énergie électromagnétique au suscepteur (42), qui transmet la chaleur induite à la partie de la préforme (10) à fibrer, pour la ramollir. La chambre (20) du four est étanche et conserve le suscepteur (42) dans une atmosphère inerte et non oxydante.
American Telephone And Telegraph Company
Kirby Eades Gale Baker
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