US2338538A - Glass-to-metal seal - Google Patents

Glass-to-metal seal Download PDF

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Publication number
US2338538A
US2338538A US276928A US27692839A US2338538A US 2338538 A US2338538 A US 2338538A US 276928 A US276928 A US 276928A US 27692839 A US27692839 A US 27692839A US 2338538 A US2338538 A US 2338538A
Authority
US
United States
Prior art keywords
glass
cobalt
iron
sleeve
alloy
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 - Lifetime
Application number
US276928A
Other languages
English (en)
Inventor
Pulfrich Hans
Magner Richard
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Application granted granted Critical
Publication of US2338538A publication Critical patent/US2338538A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • C03C27/04—Joining glass to metal by means of an interlayer
    • C03C27/042—Joining glass to metal by means of an interlayer consisting of a combination of materials selected from glass, glass-ceramic or ceramic material with metals, metal oxides or metal salts
    • C03C27/046—Joining glass to metal by means of an interlayer consisting of a combination of materials selected from glass, glass-ceramic or ceramic material with metals, metal oxides or metal salts of metals, metal oxides or metal salts only
    • 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
    • H01J5/32—Seals for leading-in conductors
    • H01J5/40—End-disc seals, e.g. flat header
    • H01J5/42—End-disc seals, e.g. flat header using intermediate part
    • 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
    • H01J2893/0034—Lamp bases
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/21—Utilizing thermal characteristic, e.g., expansion or contraction, etc.
    • Y10T403/217—Members having different coefficients of expansion

Definitions

  • the present invention relates to glass-tometal seals and more particularly to an improved method and means for sealing glass to iron.
  • a so-called soft glass i, e., a glass with a coefcient of thermal expansion of from 80 10I to 100 l07' centimeters per centimeter per degree centigrade.
  • a glass with a coefcient of thermal expansion of from 80 10I to 100 l07' centimeters per centimeter per degree centigrade.
  • Sendlinger glass which is free from lead and' which contains a substantial quantity of barium oxide. This glass has a coefficient of expansion of about 95 101.
  • a'seal which comprises a metal sleeve l, a body of glass 2, and a, leadin wire 3 which passes through the body of glass.
  • the sleeve is preferably 'constituted of iron having an alloyed surface prepared in accordance with the method described in the foregoing.
  • the conductor 3 may be of similar composition if. desired.
  • the density of the stipping applied to the sleeve I is an indication of the varying concentration of the coating metal from pointto point in the iron. It will be noted that the sleeve is alloyed only on its innerA side, the outer side being preferably free from coating in order to facilitate Welding of the sleeve to other metal parts.
  • a sleeve provided with an annular flange 5.
  • the cobalt or molybdenum coating is preferably applied only to the cylindrical portion 6 of the sleeve, being excluded, for example, from the surface of the nange 5.
  • a glass-to-metal seal including a body which consists mainly of iron, the outer layer of said body comprising an alloy of iron with a metal selected from the group consisting of cobalt and molybdenum, and a body of glass adhering to said alloy layer.
  • a glass-to-metal seal including a body which consists mainly of iron, the outer layer of said body comprising an alloy consisting substantially of iron and cobalt, and a body of glass fused to said layer, the content of cobalt in the alloy layer at the region of fusion with the glass being from about 15% to ⁇ about 30%.
  • a lead-in arrangement including a tubular iron sleeve having a layer of cobalt:iron alloy on the interiorl surface thereof; the cobalt content of said layer diminishing inwardly from the surface, a body of glass within the sleeve and sealed to the surface of said layer, and a conductor sealed through said glass and supported thereby in spaced relation to the sleeve, 'the content of cobalt in the said cobalt-iron layer at the region of fusion with the glass being from about 15% to about 30%.
  • said layer a conductor sealed throughsaid glass and supported thereby in spaced relation to the sleeve, and a laterally extending ange at one end of the said sleeve, the surfaces of said flange being lfree of cobalt'to facilitate welding' of the flange to other metallic par-ts.
  • a glass-to-metal seal including a metal body, the outer layer of said body comprising an alloy of iron and cobalt and a body of glass fused to the surface of said alloy layer, the content of cobalt in the alloy at the glass Surface being about 15 to 30 per cent and the cobalt content diminishing from the surface toward the interior.

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  • 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)
  • Joining Of Glass To Other Materials (AREA)
US276928A 1938-07-11 1939-06-01 Glass-to-metal seal Expired - Lifetime US2338538A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET2843D DE897454C (de) 1938-07-11 1938-07-11 Verfahren zur Herstellung einer Huelse fuer isolierte Stromdurchfuehrungen, insbesondere fuer elektrische Entladungsgefaesse

Publications (1)

Publication Number Publication Date
US2338538A true US2338538A (en) 1944-01-04

Family

ID=7544117

Family Applications (1)

Application Number Title Priority Date Filing Date
US276928A Expired - Lifetime US2338538A (en) 1938-07-11 1939-06-01 Glass-to-metal seal

Country Status (3)

Country Link
US (1) US2338538A (en))
DE (1) DE897454C (en))
NL (1) NL57479C (en))

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2511914A (en) * 1950-06-20 Method of and apparatus for fabri
US2515337A (en) * 1947-06-24 1950-07-18 Bell Telephone Labor Inc Metal to glass seal and method of producing same
US2670572A (en) * 1950-08-22 1954-03-02 Firth Vickers Stainless Steels Ltd Method of making glass-to-metal seals
US2784532A (en) * 1946-06-21 1957-03-12 Itt Method for making electrical terminals
US2821811A (en) * 1953-05-28 1958-02-04 Philips Corp Method of manufacturing cathode-ray tubes
US3204326A (en) * 1960-12-19 1965-09-07 American Optical Corp Multi-element energy-conducting structures and method of making the same
US3370874A (en) * 1966-07-21 1968-02-27 Isotronics Inc Hermetic metal-to-glass seal and application thereof
US3657076A (en) * 1970-12-17 1972-04-18 Us Army Method of bonding quartz to metal
US4029897A (en) * 1975-08-07 1977-06-14 Quality Hermetics Limited Glass seal
US4128697A (en) * 1977-04-22 1978-12-05 Corning Glass Works Hermetic glass-metal compression seal

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE577794C (de) * 1928-05-01 1933-06-03 Johannes Nienhold Verfahren zum Einschmelzen von Elektrodendurchfuehrungen

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2511914A (en) * 1950-06-20 Method of and apparatus for fabri
US2784532A (en) * 1946-06-21 1957-03-12 Itt Method for making electrical terminals
US2515337A (en) * 1947-06-24 1950-07-18 Bell Telephone Labor Inc Metal to glass seal and method of producing same
US2670572A (en) * 1950-08-22 1954-03-02 Firth Vickers Stainless Steels Ltd Method of making glass-to-metal seals
US2821811A (en) * 1953-05-28 1958-02-04 Philips Corp Method of manufacturing cathode-ray tubes
US3204326A (en) * 1960-12-19 1965-09-07 American Optical Corp Multi-element energy-conducting structures and method of making the same
US3370874A (en) * 1966-07-21 1968-02-27 Isotronics Inc Hermetic metal-to-glass seal and application thereof
US3657076A (en) * 1970-12-17 1972-04-18 Us Army Method of bonding quartz to metal
US4029897A (en) * 1975-08-07 1977-06-14 Quality Hermetics Limited Glass seal
US4128697A (en) * 1977-04-22 1978-12-05 Corning Glass Works Hermetic glass-metal compression seal

Also Published As

Publication number Publication date
NL57479C (en)) 1944-09-15
DE897454C (de) 1953-11-23

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