公开(公告)号：JPH11139832A

公开(公告)日：1999-05-25

申请号：JP22520398

申请日：1998-07-27

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： BRAGLIA MARCO ,  DAI GUOJUN ,  MOSSO SABRINA

IPC: C03B5/02 ,  C03B5/08 ,  F27D11/06

Abstract: PROBLEM TO BE SOLVED: To provide an improved induction electric furnace from which the temp. nonuniformity between different regions is removed. SOLUTION: The supporting device 6' for a crucible 3 of the glass synthesizing induction electric furnace and more particularly the induction electric furnace for fluorozirconate used in an fiber for communication is connected to a pair of sleeves 7, 9 and an annular element 8 constituting an actual supporting member is inserted therebetween. The first sleeve 7 has a such a size in a longitudinal direction that the crucible 3 is supported within this annular element 8 apart a specified spacing from a plane element 5'. The second sleeve has such a size in a longitudinal direction that the top end of the second sleeve exists at a level higher than the top end of the crucible so as to allow the existence of the temp. region uniform over at least the entire height of the crucible.

公开(公告)号：DE894771T1

公开(公告)日：1999-08-19

申请号：DE98114074

申请日：1998-07-28

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： BRAGLIA MARCO ,  DAI GUOJUN ,  MOSSO SABRINA

IPC: C03B5/02 ,  C03B5/08 ,  F27D11/06 ,  H05B6/02

公开(公告)号：CA2243877C

公开(公告)日：2001-05-08

申请号：CA2243877

申请日：1998-07-27

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： BRAGLIA MARCO ,  MOSSO SABRINA ,  DAI GUOJUN

IPC: C03B5/02 ,  C03B5/08 ,  F27D11/06

Abstract: In an induction furnace for the synthesis of glasses, in particular fluorozi rconate glasses for optical fibres for telecommunications, the support device (6') f or the crucible (3) is associated with a pair of sleeves (7, 9) between which an annular ele ment (8) which constitutes the actual support element is inserted. The first sleeve ( 7) has such longitudinal dimensions that the crucible (3) is supported in the annular el ement (8) in such a way as to be spaced from the planar element (5'), and the second slee ve has such longitudinal dimensions that its top edge is at a level higher than tha t of the top edge of the crucible (3), to obtain a homogeneous temperature region extendi ng at least along the entire height of the crucible (3) (Fig.2).

公开(公告)号：IT1293654B1

公开(公告)日：1999-03-08

申请号：ITTO970677

申请日：1997-07-29

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： BRAGLIA MARCO ,  DAI GUOJUN ,  MOSSO SABRINA

IPC: C03B5/02 ,  C03B5/08 ,  F27D11/06

公开(公告)号：CA2243877A1

公开(公告)日：1999-01-29

申请号：CA2243877

申请日：1998-07-27

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： BRAGLIA MARCO ,  MOSSO SABRINA ,  DAI GUOJUN

IPC: C03B5/02 ,  C03B5/08 ,  F27D11/06

Abstract: In an induction furnace for the synthesis of glasses, in particular fluorozircon ate glasses for optical fibres for telecommunications, the support device (6') for t he crucible (3) is associated with a pair of sleeves (7, 9) between which an annular element (8) which constitutes the actual support element is inserted. The first sleeve (7) h as such longitudinal dimensions that the crucible (3) is supported in the annular elemen t (8) in such a way as to be spaced from the planar element (5'), and the second sleeve h as such longitudinal dimensions that its top edge is at a level higher than that of the top edge of the crucible (3), to obtain a homogeneous temperature region extending a t least along the entire height of the crucible (3) (Fig.2).