GB851099A - Seed-glass tubes and rods - Google Patents
Seed-glass tubes and rodsInfo
- Publication number
- GB851099A GB851099A GB2169159A GB2169159A GB851099A GB 851099 A GB851099 A GB 851099A GB 2169159 A GB2169159 A GB 2169159A GB 2169159 A GB2169159 A GB 2169159A GB 851099 A GB851099 A GB 851099A
- Authority
- GB
- United Kingdom
- Prior art keywords
- glass
- rod
- tube
- bubbles
- copper
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/08—Other methods of shaping glass by foaming
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/02—Other methods of shaping glass by casting molten glass, e.g. injection moulding
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/04—Re-forming tubes or rods
- C03B23/047—Re-forming tubes or rods by drawing
- C03B23/0476—Re-forming tubes or rods by drawing onto a forming die, e.g. a mandrel or a wire
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
- Resistance Heating (AREA)
- Joining Of Glass To Other Materials (AREA)
Abstract
851,099. Glass tubes or rods. MULLARD Ltd. June 24, 1959, No. 21691/59. Class 56. A glass rod or tube has a precision-formed cylindrical surface adjacent which the glass contains small cavities or bubbles. The rod or tube is shaped with the aid of a metal former containing occluded gas by heating the temperature being such that the gas is given off to form bubbles adjacent the surface of the glass which lies against the former. Preferably a copper or nickel-iron alloy former is used which has been stoved in a hydrogen atmosphere which it absorbs. For a glass tube, a copper rod with precision-formed outer surface is inserted into the tube which is shrunk onto the rod in known manner by gas burners. The rod may be additionally heated by passing an electric current through the rod or by eddy currents. After cooling, the copper rod is placed under tension so that it stretches slightly and is withdrawn. In a glass rod, a precision-bore copper tube with one end sealed has a glass rod inserted and heated till the glass fits the tube. Similar heating and additional heating is used The cooled tube is dissolved away by acid. The rate at which the gas is given off is controlled and may be chosen so that the surface contains half-formed bubbles or round pits. The usual diameter of the bubbles in the glass is from 0.1 to 0À5 mms. but bubbles up to 1À5 mms. are also formed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2169159A GB851099A (en) | 1959-06-24 | 1959-06-24 | Seed-glass tubes and rods |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2169159A GB851099A (en) | 1959-06-24 | 1959-06-24 | Seed-glass tubes and rods |
Publications (1)
Publication Number | Publication Date |
---|---|
GB851099A true GB851099A (en) | 1960-10-12 |
Family
ID=10167225
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2169159A Expired GB851099A (en) | 1959-06-24 | 1959-06-24 | Seed-glass tubes and rods |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB851099A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0019210A2 (en) * | 1979-05-11 | 1980-11-26 | Hitachi, Ltd. | Acoustic spherical lens and method of manufacturing the same |
-
1959
- 1959-06-24 GB GB2169159A patent/GB851099A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0019210A2 (en) * | 1979-05-11 | 1980-11-26 | Hitachi, Ltd. | Acoustic spherical lens and method of manufacturing the same |
EP0019210A3 (en) * | 1979-05-11 | 1981-01-07 | Hitachi, Ltd. | Acoustic spherical lens and method of manufacturing the same |
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