GB851099A - Seed-glass tubes and rods - Google Patents

Seed-glass tubes and rods

Info

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
Application number
GB2169159A
Inventor
Frederick Theodor Buhlmann
John Mckerrow
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.)
Philips Components Ltd
Original Assignee
Mullard 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 Mullard Ltd filed Critical Mullard Ltd
Priority to GB2169159A priority Critical patent/GB851099A/en
Publication of GB851099A publication Critical patent/GB851099A/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
    • C03B19/08—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.
GB2169159A 1959-06-24 1959-06-24 Seed-glass tubes and rods Expired GB851099A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
GB844570A (en) Improvements in or relating to apparatus for use in melting a zone of a rod of semi-conductor material
GB851099A (en) Seed-glass tubes and rods
GB1087689A (en) Heat treatment of tubes
GB978251A (en) Discharge device
GB552126A (en) Improvements in the manufacture of metal tubing
GB1102390A (en) Method and device for supervising and controlling the course of the reaction in the basic-oxygen process
US3013958A (en) Isotopic labelling
US3189990A (en) Method of preparing small diameter tubes and the like
FR2391799A1 (en) Electromagnetic atomisation of molten metals - via rapidly rotating magnetic field in nozzle through which metal flows
GB922286A (en) Improvements in or relating to purification of semi-conductor material by zone drawing
GB950188A (en) Improvements in electrical vapor detector
GB937289A (en) Method and device for producing metal wire
GB955655A (en) Improvements relating to electric discharge lamps
JPS5481541A (en) Sheath heater
DE733957C (en) Process for melting power leads for electrical discharge vessels using power supply rods provided with tubular metal shells
GB840858A (en) Improvements in or relating to methods of heat-treatment of a body consisting of semi-conducting material
DE533576C (en) Process for removing gases and vapors from a metal part of the cover of discharge vessels that is connected to the glass part of the cover
GB937040A (en) Improvements in methods and apparatus for making glass rods and glass tubes
GB874757A (en) Improvements in electric heaters
GB1035224A (en) Method and apparatus for heating liquids
GB925600A (en) Improvements in or relating to furnaces
GB808199A (en) Improvements in or relating to methods of relatively fixing in predetermined position one or more metallic electrodes, more particularly electrodes for cathode-ray tubes
JPS5412856A (en) Detecting coil for metal detectors
JPS5260454A (en) Sheathed heater
GB974419A (en) Electric arc discharge device