GB532451A - Improvements in and relating to the sealing of tungsten objects in glass - Google Patents

Improvements in and relating to the sealing of tungsten objects in glass

Info

Publication number
GB532451A
GB532451A GB2009939A GB2009939A GB532451A GB 532451 A GB532451 A GB 532451A GB 2009939 A GB2009939 A GB 2009939A GB 2009939 A GB2009939 A GB 2009939A GB 532451 A GB532451 A GB 532451A
Authority
GB
United Kingdom
Prior art keywords
glass
tungsten
relating
objects
sealing
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
GB2009939A
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 Lamps Ltd
Koninklijke Philips NV
Original Assignee
Philips Lamps Ltd
Philips Gloeilampenfabrieken NV
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 Philips Lamps Ltd, Philips Gloeilampenfabrieken NV filed Critical Philips Lamps Ltd
Publication of GB532451A publication Critical patent/GB532451A/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
    • C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
    • C03C27/02—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing by fusing glass directly to metal
    • 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)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Compositions (AREA)

Abstract

532,451. Glass manufacture. PHILIPS LAMPS, Ltd. July 10, 1939, No. 20099. Convention date, July 13, 1938. [Class 56] [Also in Group XXXVI] Examples of glass into which tungsten can be sealed are (1) containing 43 per cent. of SiO 2 , 26 of B 2 O 3 , 20 of Al 2 O 3 , 3 of MgO and 8 of CaO and (2) 57 of SiO 2 , 5 of B 2 O 3 , 20.3 of Al 2 O 3 , 8.8 of MgO, 7.4 of CaO, 1 of BaO and 0.5 of K 2 O. The glasses have a softening temperature of 500‹-800‹C. and an alkaline oxide content of less than one per cent.
GB2009939A 1938-07-13 1939-07-10 Improvements in and relating to the sealing of tungsten objects in glass Expired GB532451A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL54839T 1938-07-13

Publications (1)

Publication Number Publication Date
GB532451A true GB532451A (en) 1941-01-24

Family

ID=32844951

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2009939A Expired GB532451A (en) 1938-07-13 1939-07-10 Improvements in and relating to the sealing of tungsten objects in glass

Country Status (6)

Country Link
BE (1) BE435393A (en)
CH (1) CH214493A (en)
DE (1) DE1079288B (en)
FR (1) FR857723A (en)
GB (1) GB532451A (en)
NL (1) NL54839C (en)

Also Published As

Publication number Publication date
FR857723A (en) 1940-09-26
DE1079288B (en) 1960-04-07
NL54839C (en) 1943-02-15
CH214493A (en) 1941-04-30
BE435393A (en) 1939-08-31

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