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GB1439261A - Production of clad glass rod - Google Patents

Production of clad glass rod

Info

Publication number
GB1439261A
GB1439261A GB4088973A GB4088973A GB1439261A GB 1439261 A GB1439261 A GB 1439261A GB 4088973 A GB4088973 A GB 4088973A GB 4088973 A GB4088973 A GB 4088973A GB 1439261 A GB1439261 A GB 1439261A
Authority
GB
United Kingdom
Prior art keywords
glass
crucible
rod
production
charge
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
GB4088973A
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 GB4088973A priority Critical patent/GB1439261A/en
Priority to DE2440770A priority patent/DE2440770A1/en
Priority to NL7411367A priority patent/NL7411367A/en
Priority to IT2666674A priority patent/IT1020238B/en
Priority to JP49099043A priority patent/JPS5073648A/ja
Priority to CH1472274A priority patent/CH592029A5/xx
Publication of GB1439261A publication Critical patent/GB1439261A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/653—Processes involving a melting step
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B15/00—Drawing glass upwardly from the melt
    • C03B15/14—Drawing tubes, cylinders, or rods from the melt
    • C03B15/16—Drawing tubes, cylinders or rods, coated with coloured layers
    • 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
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/01265—Manufacture of preforms for drawing fibres or filaments starting entirely or partially from molten glass, e.g. by dipping a preform in a melt
    • C03B37/01274—Manufacture of preforms for drawing fibres or filaments starting entirely or partially from molten glass, e.g. by dipping a preform in a melt by extrusion or drawing
    • 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
    • C03B5/02—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces, e.g. by dielectric heating
    • C03B5/021—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces, e.g. by dielectric heating by induction heating
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/22—Furnaces without an endless core
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/36—Coil arrangements
    • H05B6/367—Coil arrangements for melting furnaces
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2201/00—Type of glass produced
    • C03B2201/06—Doped silica-based glasses
    • C03B2201/30—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi
    • C03B2201/50—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi doped with alkali metals
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2201/00—Type of glass produced
    • C03B2201/06—Doped silica-based glasses
    • C03B2201/30—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi
    • C03B2201/54—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi doped with beryllium, magnesium or alkaline earth metals
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2205/00—Fibre drawing or extruding details
    • C03B2205/02—Upward drawing

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Glass Compositions (AREA)
  • Glass Melting And Manufacturing (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)

Abstract

1439261 Production of a clad glass rod STANDARD TELEPHONES & CABLES Ltd 30 Aug 1973 40889/73 Heading C1M A glass rod consisting of a central core region of a first glass and a cladding of a second glass is produced by heating a glass melt 23 of the first glass contained in a first crucible 22, placing a second crucible 25 containing a charge 26 on to the surface of the melt 23, the crucible 25 having a hole 27 in its base, and dipping as each rod 28 into the second glass 26 and then withdrawing the second rod at a controlled rate. The crucibles are formed of natural silica which is stated to resist attack as a result of a layer of cristobalite formed on the inner wall of the crucible during use. The two glasses are heated by a radiofrequency induction coil 10. The charge of second glass is preferably a casting which has been cast into a vitreous carbon mould.
GB4088973A 1973-08-30 1973-08-30 Production of clad glass rod Expired GB1439261A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GB4088973A GB1439261A (en) 1973-08-30 1973-08-30 Production of clad glass rod
DE2440770A DE2440770A1 (en) 1973-08-30 1974-08-26 METHOD OF MANUFACTURING A COVERED GLASS ROD
NL7411367A NL7411367A (en) 1973-08-30 1974-08-27 METHOD OF DRAWING A GLASS BAR WITH A COMPOSITE STRUCTURE.
IT2666674A IT1020238B (en) 1973-08-30 1974-08-28 PRODUCTION OF A COATED GLASS WAND
JP49099043A JPS5073648A (en) 1973-08-30 1974-08-30
CH1472274A CH592029A5 (en) 1973-08-30 1974-11-04

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB4088973A GB1439261A (en) 1973-08-30 1973-08-30 Production of clad glass rod
CH1472274A CH592029A5 (en) 1973-08-30 1974-11-04

Publications (1)

Publication Number Publication Date
GB1439261A true GB1439261A (en) 1976-06-16

Family

ID=25714996

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4088973A Expired GB1439261A (en) 1973-08-30 1973-08-30 Production of clad glass rod

Country Status (5)

Country Link
JP (1) JPS5073648A (en)
CH (1) CH592029A5 (en)
DE (1) DE2440770A1 (en)
GB (1) GB1439261A (en)
NL (1) NL7411367A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1487446A (en) * 1975-05-13 1977-09-28 Standard Telephones Cables Ltd Glass manufacture
US4110090A (en) * 1977-03-02 1978-08-29 Gte Laboratories Incorporated Method of forming optical fibers
JP2694860B2 (en) * 1992-04-28 1997-12-24 セントラル硝子株式会社 Method for manufacturing fluoride glass preform
JP4844368B2 (en) * 2006-11-30 2011-12-28 パナソニック電工株式会社 Cabinet with slide step

Also Published As

Publication number Publication date
JPS5073648A (en) 1975-06-17
CH592029A5 (en) 1977-10-14
DE2440770A1 (en) 1975-03-06
NL7411367A (en) 1975-03-04

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee