GB2147735B - Fluorescent lamps - Google Patents

Fluorescent lamps

Info

Publication number
GB2147735B
GB2147735B GB08423967A GB8423967A GB2147735B GB 2147735 B GB2147735 B GB 2147735B GB 08423967 A GB08423967 A GB 08423967A GB 8423967 A GB8423967 A GB 8423967A GB 2147735 B GB2147735 B GB 2147735B
Authority
GB
United Kingdom
Prior art keywords
fluorescent lamps
lamps
fluorescent
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
GB08423967A
Other versions
GB2147735A (en
GB8423967D0 (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 GB8423967D0 publication Critical patent/GB8423967D0/en
Publication of GB2147735A publication Critical patent/GB2147735A/en
Application granted granted Critical
Publication of GB2147735B publication Critical patent/GB2147735B/en
Expired 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
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/06—Main electrodes
    • H01J61/067—Main electrodes for low-pressure discharge lamps
GB08423967A 1983-10-08 1984-09-21 Fluorescent lamps Expired GB2147735B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB838326980A GB8326980D0 (en) 1983-10-08 1983-10-08 Reducing end darkening in fluorescent lamps

Publications (3)

Publication Number Publication Date
GB8423967D0 GB8423967D0 (en) 1984-10-31
GB2147735A GB2147735A (en) 1985-05-15
GB2147735B true GB2147735B (en) 1987-02-04

Family

ID=10549899

Family Applications (2)

Application Number Title Priority Date Filing Date
GB838326980A Pending GB8326980D0 (en) 1983-10-08 1983-10-08 Reducing end darkening in fluorescent lamps
GB08423967A Expired GB2147735B (en) 1983-10-08 1984-09-21 Fluorescent lamps

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB838326980A Pending GB8326980D0 (en) 1983-10-08 1983-10-08 Reducing end darkening in fluorescent lamps

Country Status (2)

Country Link
DE (1) DE8427957U1 (en)
GB (2) GB8326980D0 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004525494A (en) * 2001-05-08 2004-08-19 コーニンクレッカ　フィリップス　エレクトロニクス　エヌ　ヴィ Low pressure mercury vapor discharge lamp
US6614146B2 (en) * 2001-09-24 2003-09-02 Osram Sylvania Inc. Electrode shield for fluorescent lamp having a pair of spaced apart shield plates

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL59720C (en) * 1942-06-16
GB692693A (en) * 1948-01-02 1953-06-10 Philips Nv Improvements in or relating to vapour discharge lamps
US3121184A (en) * 1960-12-30 1964-02-11 Gen Electric Discharge lamp with cathode shields
US3525009A (en) * 1968-02-05 1970-08-18 Tokyo Shibaura Electric Co Low pressure mercury vapour discharge lamp including an alloy type getter coating
US4013914A (en) * 1975-11-26 1977-03-22 North American Philips Corporation electrode protecting means for electric discharge lamps
GB1589473A (en) * 1977-07-11 1981-05-13 Thorn Emi Ltd Fluorescent lamps

Also Published As

Publication number Publication date
GB2147735A (en) 1985-05-15
GB8326980D0 (en) 1983-11-09
GB8423967D0 (en) 1984-10-31
DE8427957U1 (en) 1985-01-03

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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: 19990921