Title:
FLEXIBLE TYPE OPTICAL FIBER GUIDE PIPE
Document Type and Number:
Japanese Patent JP3448427
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To enable optionally changing of the shape of a feeding path for feeding an optical fiber when measuring temperature within molten metal by a method wherein an optical fiber wound on a bobbin is fed by a feeding mechanism into the molten metal passing through a tip guide to transmit and guide heat radiation light in the molten metal to a radiation thermometer at the tip of the optical fiber.
SOLUTION: A flexible type optical fiber guide pipe 21 is used at a bent part of a feeding path 25 provided between a bobbin 1 and a tip guide 11. The flexible type optical fiber guide pipe 21 has at least single or double coil springs 31 and 33 and the inner coil spring 31 comprises a wire with a smaller diameter to reduce friction with the optical fiber. The outer coil spring 33 comprises a wire with a sufficiently large diameter, thereby developing sufficiently large rigidity.
Inventors:
Atsushi Sakai
Shigeru Wakita
WAKAI
Zenkichi Yamanaka
Akira Matsubayashi
Akinori Kaihara
Shigeru Wakita
WAKAI
Zenkichi Yamanaka
Akira Matsubayashi
Akinori Kaihara
Application Number:
JP11198696A
Publication Date:
September 22, 2003
Filing Date:
April 09, 1996
Export Citation:
Assignee:
JFE Steel Corporation
Mentec Kiko Co., Ltd.
Mentec Kiko Co., Ltd.
International Classes:
G01J5/02; B65H57/08; C21B7/24; C21C1/00; C21C5/46; G01J5/00; G01J5/08; G02B6/00; (IPC1-7): G02B6/00; B65H57/08; C21B7/24; C21C1/00; C21C5/46; G01J5/02; G01J5/08
Domestic Patent References:
| JP7243912A | ||||
| JP4229806A |
Attorney, Agent or Firm:
Kawawa Takaho
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