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GB2179200B - Improvements in or relating to discharge lamps - Google Patents
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GB2179200B - Improvements in or relating to discharge lamps - Google Patents

Improvements in or relating to discharge lamps

Info

Publication number
GB2179200B
GB2179200B GB8616993A GB8616993A GB2179200B GB 2179200 B GB2179200 B GB 2179200B GB 8616993 A GB8616993 A GB 8616993A GB 8616993 A GB8616993 A GB 8616993A GB 2179200 B GB2179200 B GB 2179200B
Authority
GB
United Kingdom
Prior art keywords
relating
discharge lamps
lamps
discharge
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
GB8616993A
Other versions
GB2179200A (en
GB8616993D0 (en
Inventor
Ashutosh Roy
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.)
EMI Group Ltd
Original Assignee
Thorn EMI PLC
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 Thorn EMI PLC filed Critical Thorn EMI PLC
Publication of GB8616993D0 publication Critical patent/GB8616993D0/en
Publication of GB2179200A publication Critical patent/GB2179200A/en
Application granted granted Critical
Publication of GB2179200B publication Critical patent/GB2179200B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
GB8616993A 1985-07-12 1986-07-11 Improvements in or relating to discharge lamps Expired - Lifetime GB2179200B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB858517666A GB8517666D0 (en) 1985-07-12 1985-07-12 Discharge lamps

Publications (3)

Publication Number Publication Date
GB8616993D0 GB8616993D0 (en) 1986-08-20
GB2179200A GB2179200A (en) 1987-02-25
GB2179200B true GB2179200B (en) 1990-01-04

Family

ID=10582206

Family Applications (2)

Application Number Title Priority Date Filing Date
GB858517666A Pending GB8517666D0 (en) 1985-07-12 1985-07-12 Discharge lamps
GB8616993A Expired - Lifetime GB2179200B (en) 1985-07-12 1986-07-11 Improvements in or relating to discharge lamps

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB858517666A Pending GB8517666D0 (en) 1985-07-12 1985-07-12 Discharge lamps

Country Status (3)

Country Link
DE (1) DE3623436A1 (en)
FR (1) FR2584860B1 (en)
GB (2) GB8517666D0 (en)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3676083A (en) * 1969-01-21 1972-07-11 Sylvania Electric Prod Molybdenum base alloys
GB1571084A (en) * 1975-12-09 1980-07-09 Thorn Electrical Ind Ltd Electric lamps and components and materials therefor
GB1589473A (en) * 1977-07-11 1981-05-13 Thorn Emi Ltd Fluorescent lamps
DE3063533D1 (en) * 1979-11-12 1983-07-07 Emi Plc Thorn An electrically conducting cermet, its production and use
US4322248A (en) * 1979-11-15 1982-03-30 Gte Products Corporation Doped molybdenum-tantalum wire and method for making
JPS57123625A (en) * 1981-01-23 1982-08-02 Toshiba Corp Bulb
EP0070095B1 (en) * 1981-07-10 1985-09-18 THORN EMI plc Fluorescent lamp and electrode assembly for such a lamp
JPS60194043A (en) * 1984-03-14 1985-10-02 Toshiba Corp tube wells
JPS60230351A (en) * 1984-04-27 1985-11-15 Toshiba Corp Low pressure mercury vapor electric-discharge lamp

Also Published As

Publication number Publication date
GB2179200A (en) 1987-02-25
FR2584860A1 (en) 1987-01-16
GB8616993D0 (en) 1986-08-20
FR2584860B1 (en) 1994-04-15
GB8517666D0 (en) 1985-08-21
DE3623436A1 (en) 1987-01-15

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20020711