GB676679A - Improvements in and relating to electrode seals - Google Patents

Improvements in and relating to electrode seals

Info

Publication number
GB676679A
GB676679A GB30896/50A GB3089650A GB676679A GB 676679 A GB676679 A GB 676679A GB 30896/50 A GB30896/50 A GB 30896/50A GB 3089650 A GB3089650 A GB 3089650A GB 676679 A GB676679 A GB 676679A
Authority
GB
United Kingdom
Prior art keywords
bush
bead
ceramic
casing
glass
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
GB30896/50A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB676679A publication Critical patent/GB676679A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/32Seals for leading-in conductors
    • H01J5/40End-disc seals, e.g. flat header
    • H01J5/42End-disc seals, e.g. flat header using intermediate part
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00Discharge tubes and lamps
    • H01J2893/0033Vacuum connection techniques applicable to discharge tubes and lamps
    • H01J2893/0034Lamp bases

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

676,679. Ceramic-metal seals. BRITISH THOMSON-HOUSTON CO., Ltd. Dec. 19, 1950 [Dec. 31, 1949], No. 30896/50. Class 36. A lead-in conductor 3 is passed through a ceramic bush 4 having a glass bead 9 sealed around a substantially central portion thereof by fusion, the glass having a smaller coefficient of expansion than the ceramic, a metal sleeve 5 being positioned around the bush 4 so that one end thereof is embedded in the bead 9, the other end being hermetically sealed to the conductor 3. The bead 9 may be sealed directly to the glass envelope of an electronic discharge device, or a second metal sleeve 8 surrounding the bush 4 may have one end embedded in the bead 9, the other end being welded to the rim of an aperture in a metal casing 2. The end of the bush within the casing 2 may be provided with a counterbore 10 to increase the length of the leakage path from the casing to the leadconductor.
GB30896/50A 1949-12-31 1950-12-19 Improvements in and relating to electrode seals Expired GB676679A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US676679XA 1949-12-31 1949-12-31

Publications (1)

Publication Number Publication Date
GB676679A true GB676679A (en) 1952-07-30

Family

ID=22077560

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30896/50A Expired GB676679A (en) 1949-12-31 1950-12-19 Improvements in and relating to electrode seals

Country Status (1)

Country Link
GB (1) GB676679A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1017238B (en) * 1954-05-24 1957-10-10 Siemens Ag Electrical implementation with a solid, cast glass body as an insulating part
DE1032354B (en) * 1953-11-25 1958-06-19 Hydrawerk Ag Electrode feed-through

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1032354B (en) * 1953-11-25 1958-06-19 Hydrawerk Ag Electrode feed-through
DE1017238B (en) * 1954-05-24 1957-10-10 Siemens Ag Electrical implementation with a solid, cast glass body as an insulating part

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