GB860434A - Improvements in the production of optical lenses - Google Patents

Improvements in the production of optical lenses

Info

Publication number
GB860434A
GB860434A GB3692856A GB3692856A GB860434A GB 860434 A GB860434 A GB 860434A GB 3692856 A GB3692856 A GB 3692856A GB 3692856 A GB3692856 A GB 3692856A GB 860434 A GB860434 A GB 860434A
Authority
GB
United Kingdom
Prior art keywords
glass
frame
lens
assembly
shape
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
GB3692856A
Inventor
William Joseph Scott
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries 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 Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB3692856A priority Critical patent/GB860434A/en
Publication of GB860434A publication Critical patent/GB860434A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/20—Seals between parts of vessels
    • H01J5/22—Vacuum-tight joints between parts of vessel
    • H01J5/26—Vacuum-tight joints between parts of vessel between insulating and conductive parts of vessel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0033—Vacuum connection techniques applicable to discharge tubes and lamps
    • H01J2893/0037—Solid sealing members other than lamp bases
    • H01J2893/0041—Direct connection between insulating and metal elements, in particular via glass material
    • H01J2893/0043—Glass-to-metal or quartz-to-metal, e.g. by soldering

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Joining Of Glass To Other Materials (AREA)

Abstract

860,434. Glass-metal seals. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Jan. 10, 1958 [Dec. 3, 1956], No. 36928/56. Class 36. [Also in Group XXIII] A lens is formed by fusing within a substantially circular metal frame, arranged with its axis vertically, a body of glass, the volume of which is such that the opposed surfaces of the glass both acquire-solely as a result of surface tension and gravity-a spherical configuration while the glass is soft and retain this shape as the glass solidifies. As shown in Fig. 1, the frame 1 has a flange 2 and the glass body initially has the shape 5. In Fig. 4, the frame is a tube 1 having an internally projecting flange 12. The glass body may be shaped to form a bead prior to being brought into contact with the frame or a larger quantity of glass may be sealed to the frame, the excess removed by rough grinding and the assembly reheated to form the lens. The assembly may be inverted periodically during sealing to modify the curvature of the surfaces. Specification 572,020 is referred to.
GB3692856A 1956-12-03 1956-12-03 Improvements in the production of optical lenses Expired GB860434A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3692856A GB860434A (en) 1956-12-03 1956-12-03 Improvements in the production of optical lenses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3692856A GB860434A (en) 1956-12-03 1956-12-03 Improvements in the production of optical lenses

Publications (1)

Publication Number Publication Date
GB860434A true GB860434A (en) 1961-02-08

Family

ID=10392322

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3692856A Expired GB860434A (en) 1956-12-03 1956-12-03 Improvements in the production of optical lenses

Country Status (1)

Country Link
GB (1) GB860434A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4224047A (en) * 1979-01-25 1980-09-23 The Singer Company Method of fusing a sight glass to a metal part

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4224047A (en) * 1979-01-25 1980-09-23 The Singer Company Method of fusing a sight glass to a metal part

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