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GB1470010A - Optical fibre manufacture - Google Patents

Optical fibre manufacture

Info

Publication number
GB1470010A
GB1470010A GB3184974A GB3184974A GB1470010A GB 1470010 A GB1470010 A GB 1470010A GB 3184974 A GB3184974 A GB 3184974A GB 3184974 A GB3184974 A GB 3184974A GB 1470010 A GB1470010 A GB 1470010A
Authority
GB
United Kingdom
Prior art keywords
chamber
outlet
fibre
bushing
torr
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3184974A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB3184974A priority Critical patent/GB1470010A/en
Priority to CH914775A priority patent/CH603498A5/xx
Priority to FR7522515A priority patent/FR2278639A1/en
Publication of GB1470010A publication Critical patent/GB1470010A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/225—Refining
    • C03B5/2252—Refining under reduced pressure, e.g. with vacuum refiners
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
    • C03B37/022—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from molten glass in which the resultant product consists of different sorts of glass or is characterised by shape, e.g. hollow fibres, undulated fibres, fibres presenting a rough surface
    • C03B37/023—Fibres composed of different sorts of glass, e.g. glass optical fibres, made by the double crucible technique

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

1470010 Forming optical fibres STANDARD TELEPHONES & CABLES Ltd 18 July 1974 31849/74 Heading C1M In producing an optical fibre, the fibre is caused to flow from the outlet 18 of a double bushing whose inner bushing 10 and outer bushing 12 contain melts of core glass 11 and cladding glass 13 respectively, the melts being exposed to a first vacuum in chamber 16, the fibre passing into a second, less highly evacuated, chamber 17 before passing through outlet 19. The first chamber 16 may be at a pressure of about 10<SP>-4</SP> Torr, and the second chamber 17 at about 1 Torr. The inner and outer bushings 10, 12 may be of silica. Outlet 19 may comprise an iris diaphragm. The apparatus may comprise a radiant heater 14 and reflector 15, and a further radiant heater 20 focused on a point just above outlet 18.
GB3184974A 1974-07-18 1974-07-18 Optical fibre manufacture Expired GB1470010A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB3184974A GB1470010A (en) 1974-07-18 1974-07-18 Optical fibre manufacture
CH914775A CH603498A5 (en) 1974-07-18 1975-07-14
FR7522515A FR2278639A1 (en) 1974-07-18 1975-07-18 OPTICAL FIBER AND ITS MANUFACTURING PROCESS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3184974A GB1470010A (en) 1974-07-18 1974-07-18 Optical fibre manufacture

Publications (1)

Publication Number Publication Date
GB1470010A true GB1470010A (en) 1977-04-14

Family

ID=10329318

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3184974A Expired GB1470010A (en) 1974-07-18 1974-07-18 Optical fibre manufacture

Country Status (3)

Country Link
CH (1) CH603498A5 (en)
FR (1) FR2278639A1 (en)
GB (1) GB1470010A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10055969C1 (en) * 2000-11-11 2002-05-02 Schott Glas Process for refining a glass melt comprises feeding the glass flow through vacuum chambers, and reducing the pressure in the chambers to atmospheric pressure

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1179876B (en) * 1984-12-18 1987-09-16 Cselt Centro Studi Lab Telecom EQUIPMENT FOR THE CONTINUOUS PRODUCTION OF OPTICAL FIBERS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10055969C1 (en) * 2000-11-11 2002-05-02 Schott Glas Process for refining a glass melt comprises feeding the glass flow through vacuum chambers, and reducing the pressure in the chambers to atmospheric pressure

Also Published As

Publication number Publication date
FR2278639B1 (en) 1982-04-02
FR2278639A1 (en) 1976-02-13
CH603498A5 (en) 1978-08-15

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee