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GB2125615B - Improvements in hp discharge lamps - Google Patents

Improvements in hp discharge lamps

Info

Publication number
GB2125615B
GB2125615B GB08320718A GB8320718A GB2125615B GB 2125615 B GB2125615 B GB 2125615B GB 08320718 A GB08320718 A GB 08320718A GB 8320718 A GB8320718 A GB 8320718A GB 2125615 B GB2125615 B GB 2125615B
Authority
GB
United Kingdom
Prior art keywords
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
Application number
GB08320718A
Other versions
GB8320718D0 (en
GB2125615A (en
Inventor
Richard John Seddon
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 GB08320718A priority Critical patent/GB2125615B/en
Publication of GB8320718D0 publication Critical patent/GB8320718D0/en
Publication of GB2125615A publication Critical patent/GB2125615A/en
Application granted granted Critical
Publication of GB2125615B publication Critical patent/GB2125615B/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
    • H01J61/24—Means for obtaining or maintaining the desired pressure within the vessel
    • H01J61/26—Means for absorbing or adsorbing gas, e.g. by gettering; Means for preventing blackening of the envelope
GB08320718A 1982-08-05 1983-08-01 Improvements in hp discharge lamps Expired GB2125615B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08320718A GB2125615B (en) 1982-08-05 1983-08-01 Improvements in hp discharge lamps

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8222650 1982-08-05
GB08320718A GB2125615B (en) 1982-08-05 1983-08-01 Improvements in hp discharge lamps

Publications (3)

Publication Number Publication Date
GB8320718D0 GB8320718D0 (en) 1983-09-01
GB2125615A GB2125615A (en) 1984-03-07
GB2125615B true GB2125615B (en) 1985-11-27

Family

ID=26283527

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08320718A Expired GB2125615B (en) 1982-08-05 1983-08-01 Improvements in hp discharge lamps

Country Status (1)

Country Link
GB (1) GB2125615B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1214196A (en) * 1983-02-14 1986-11-18 Jack M. Strok Color rendition high pressure sodium arc tubes having an oxygen getter
GB8616148D0 (en) * 1986-07-02 1986-08-06 Emi Plc Thorn Discharge lamps
GB8623296D0 (en) * 1986-09-27 1986-10-29 Emi Plc Thorn Hydrogen getter
HU207174B (en) * 1991-01-31 1993-03-01 Tungsram Reszvenytarsasag High pressure discharge lamp with a getter appliance increasing life
US20090296400A1 (en) * 2004-12-17 2009-12-03 Masaru Ikeda High-pressure mercury lamp, lamp unit, and image display apparatus
US20090267510A1 (en) * 2006-06-19 2009-10-29 Koninklijke Philips Electronics N.V. Discharge lamp

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB870614A (en) * 1958-05-15 1961-06-14 Standard Telephones Cables Ltd Improvements in or relating to thermionic valves
US3285687A (en) * 1963-12-30 1966-11-15 Gen Electric Gettering apparatus
FR1527220A (en) * 1967-04-21 1968-05-31 Csf Improvements to titanium sublimation filaments for application in vacuum techniques
NL6804720A (en) * 1968-04-04 1969-10-07
NL7108465A (en) * 1970-06-24 1971-12-28
US4025812A (en) * 1975-10-14 1977-05-24 General Electric Company Alumina ceramic alkali metal lamp having metal getter structure

Also Published As

Publication number Publication date
GB8320718D0 (en) 1983-09-01
GB2125615A (en) 1984-03-07

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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: 20030731