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GB2137407B - Low pressure discharge lamps - Google Patents

Low pressure discharge lamps

Info

Publication number
GB2137407B
GB2137407B GB08308104A GB8308104A GB2137407B GB 2137407 B GB2137407 B GB 2137407B GB 08308104 A GB08308104 A GB 08308104A GB 8308104 A GB8308104 A GB 8308104A GB 2137407 B GB2137407 B GB 2137407B
Authority
GB
United Kingdom
Prior art keywords
low pressure
pressure discharge
discharge lamps
lamps
low
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
GB08308104A
Other versions
GB2137407A (en
GB8308104D0 (en
Inventor
Michael Wilfred Kirby
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
Priority to GB08308104A priority Critical patent/GB2137407B/en
Publication of GB8308104D0 publication Critical patent/GB8308104D0/en
Publication of GB2137407A publication Critical patent/GB2137407A/en
Application granted granted Critical
Publication of GB2137407B publication Critical patent/GB2137407B/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
    • H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
    • H01J61/74—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a main light-emitting filling of difficult vaporisable metal vapour, e.g. sodium
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/52—Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space
    • H01J61/523—Heating or cooling particular parts of the lamp
GB08308104A 1983-03-24 1983-03-24 Low pressure discharge lamps Expired GB2137407B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08308104A GB2137407B (en) 1983-03-24 1983-03-24 Low pressure discharge lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08308104A GB2137407B (en) 1983-03-24 1983-03-24 Low pressure discharge lamps

Publications (3)

Publication Number Publication Date
GB8308104D0 GB8308104D0 (en) 1983-05-05
GB2137407A GB2137407A (en) 1984-10-03
GB2137407B true GB2137407B (en) 1986-09-24

Family

ID=10540125

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08308104A Expired GB2137407B (en) 1983-03-24 1983-03-24 Low pressure discharge lamps

Country Status (1)

Country Link
GB (1) GB2137407B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9016904U1 (en) * 1990-12-14 1991-03-07 Fritz Eichenauer GmbH & Co. KG Fabrik elektr. Spezialartikel, 6744 Kandel Electrical device for preheating the glass bulbs of compact fluorescent lamps
WO2015054912A1 (en) * 2013-10-19 2015-04-23 黑龙江龙态环保科技发展有限公司 Method of manufacturing multiple u-shaped sodium lamp inner tubes, and compact plasma sodium lamp employing same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL42087C (en) * 1933-11-06
NL7810672A (en) * 1978-10-26 1980-04-29 Philips Nv LOW-PRESSURE MERCURY DISCHARGE LAMP.
NL185546C (en) * 1981-10-08 1990-05-01 Philips Nv GAS AND / OR VAPOR DISCHARGE LAMP FITTED WITH A U-SHAPED DISCHARGE TUBE.

Also Published As

Publication number Publication date
GB2137407A (en) 1984-10-03
GB8308104D0 (en) 1983-05-05

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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)
PE20 Patent expired after termination of 20 years

Effective date: 20030323