GB399750A - Improvements in and relating to methods of making articles of refractory material such as silica - Google Patents

Improvements in and relating to methods of making articles of refractory material such as silica

Info

Publication number
GB399750A
GB399750A GB13484/33A GB1348433A GB399750A GB 399750 A GB399750 A GB 399750A GB 13484/33 A GB13484/33 A GB 13484/33A GB 1348433 A GB1348433 A GB 1348433A GB 399750 A GB399750 A GB 399750A
Authority
GB
United Kingdom
Prior art keywords
silica
layer
support
transparent
refractory material
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
GB13484/33A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB399750A publication Critical patent/GB399750A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B19/00—Other methods of shaping glass
    • C03B19/01—Other methods of shaping glass by progressive fusion or sintering of powdered glass onto a shaping substrate, i.e. accretion, e.g. plasma oxidation deposition

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Compositions (AREA)

Abstract

399,750. Fused silica. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Thomson, E. ; 22, Monument Avenue, Swampscott, Massachusetts, U.S.A.) May 9, 1933, No. 13484. Convention date, May 10, 1932. [Class 56.] Relates to the method of making a massive article of fused silica, such as a mirror for an astronomical telescope, by depositing fused silica on a base by means of a flame, as described in Specification 296,059, [Class 56, Glass]. According to the present invention, a layer of transparent vitreous silica is deposited on a support, and the rate of deposition is then increased to form a backing of less density on the transparent layer. The support 5, which may have any suitable configuration, consists of a refractory material and is enclosed in a furnace by which it is heated to a temperature of about 1000‹ C. Comminuted silica is projected by a burner 7 against the support until it forms a layer 4 of transparent vitreous silica. After this layer has attained the desired thickness, the rate of feed of the silica to the burner is increased so that a backing 15 is formed which is less dense than the transparent silica and may contain gas bubbles. Finally, the completed composite article is removed from the support and the surface of the layer 4 is ground and polished. Specification 399,749 is referred to.
GB13484/33A 1932-05-10 1933-05-09 Improvements in and relating to methods of making articles of refractory material such as silica Expired GB399750A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US399750XA 1932-05-10 1932-05-10

Publications (1)

Publication Number Publication Date
GB399750A true GB399750A (en) 1933-10-12

Family

ID=21908393

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13484/33A Expired GB399750A (en) 1932-05-10 1933-05-09 Improvements in and relating to methods of making articles of refractory material such as silica

Country Status (1)

Country Link
GB (1) GB399750A (en)

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