公开(公告)号：GB2192698B

公开(公告)日：1990-06-20

申请号：GB8617158

申请日：1986-07-15

Applicant: STC PLC

Inventor： TOMLINSON PAUL GERARD ,  NEWBOULD RICHARD THOMAS ,  SEARLE ANDREW ARTHUR

IPC: C03B37/029 ,  F27B9/06 ,  H05B6/02

公开(公告)号：GB2192698A

公开(公告)日：1988-01-20

申请号：GB8617158

申请日：1986-07-15

Applicant: STC PLC

Inventor： TOMLINSON PAUL GERARD ,  NEWBOULD RICHARD THOMAS ,  SEARLE ANDREW ARTHUR

IPC: C03B37/029 ,  F27B9/06 ,  H05B6/02 ,  F27B14/10 ,  C03B37/02 ,  F27B14/14

Abstract: An induction furnace for drawing glass optical fibres from a preform has a R.F. powdered (7) susceptor element comprising a zirconia ring (1) within which the work if heated, located end wise between upper and lower rings (3), e.g. of silica, silicon carbide, alumina, titania, the zirconia ring (1) along its entire length reaching temperatures above any phase change so that the preform and fibre are not contaminated by zirconia particles. The three rings are located inside a tubular-zirconia support 4 and a silica "can" 6.