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GB2269700B - Discharge lamps - Google Patents

Discharge lamps

Info

Publication number
GB2269700B
GB2269700B GB9315708A GB9315708A GB2269700B GB 2269700 B GB2269700 B GB 2269700B GB 9315708 A GB9315708 A GB 9315708A GB 9315708 A GB9315708 A GB 9315708A GB 2269700 B GB2269700 B GB 2269700B
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 - Fee Related
Application number
GB9315708A
Other versions
GB9315708D0 (en
GB2269700A (en
Inventor
Neil Anthony Fox
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.)
Smiths Group PLC
Original Assignee
Smiths Group 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
Priority claimed from GB929216785A external-priority patent/GB9216785D0/en
Application filed by Smiths Group PLC filed Critical Smiths Group PLC
Priority to GB9315708A priority Critical patent/GB2269700B/en
Publication of GB9315708D0 publication Critical patent/GB9315708D0/en
Publication of GB2269700A publication Critical patent/GB2269700A/en
Application granted granted Critical
Publication of GB2269700B publication Critical patent/GB2269700B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H01J61/0672—Main electrodes for low-pressure discharge lamps characterised by the construction of the electrode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/02—Details
    • H01J17/04—Electrodes; Screens
    • H01J17/06—Cathodes
    • H01J17/066—Cold cathodes
    • 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
    • H01J61/76—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a filling of permanent gas or gases only
    • H01J61/78—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a filling of permanent gas or gases only with cold cathode; with cathode heated only by discharge, e.g. high-tension lamp for advertising
GB9315708A 1992-08-07 1993-07-29 Discharge lamps Expired - Fee Related GB2269700B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9315708A GB2269700B (en) 1992-08-07 1993-07-29 Discharge lamps

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB929216785A GB9216785D0 (en) 1992-08-07 1992-08-07 Gas discharge electrodes
GB9315708A GB2269700B (en) 1992-08-07 1993-07-29 Discharge lamps

Publications (3)

Publication Number Publication Date
GB9315708D0 GB9315708D0 (en) 1993-09-15
GB2269700A GB2269700A (en) 1994-02-16
GB2269700B true GB2269700B (en) 1996-03-06

Family

ID=26301390

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9315708A Expired - Fee Related GB2269700B (en) 1992-08-07 1993-07-29 Discharge lamps

Country Status (1)

Country Link
GB (1) GB2269700B (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB384857A (en) * 1931-03-14 1932-12-15 Gen Electric Co Ltd Improvements in luminous electric discharge tubes
GB669679A (en) * 1948-11-22 1952-04-09 Western Electric Co Improvements in or relating to cold-cathode gaseous electric discharge devices
GB701589A (en) * 1949-12-10 1953-12-30 Loewe Opta Ag Electric discharge tube for emission of visible light
GB1222089A (en) * 1968-07-10 1971-02-10 Sylvania Electric Prod Electric discharge lamp
WO1988000758A1 (en) * 1986-07-11 1988-01-28 Fox Leslie Z A high-frequency fluorescent lamp
WO1989012905A1 (en) * 1988-06-16 1989-12-28 Hughes Aircraft Company Plasma switch with chrome, perturbated cold cathode
GB2244855A (en) * 1990-03-31 1991-12-11 Smiths Industries Plc Gas discharge electrodes.

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB384857A (en) * 1931-03-14 1932-12-15 Gen Electric Co Ltd Improvements in luminous electric discharge tubes
GB669679A (en) * 1948-11-22 1952-04-09 Western Electric Co Improvements in or relating to cold-cathode gaseous electric discharge devices
GB701589A (en) * 1949-12-10 1953-12-30 Loewe Opta Ag Electric discharge tube for emission of visible light
GB1222089A (en) * 1968-07-10 1971-02-10 Sylvania Electric Prod Electric discharge lamp
WO1988000758A1 (en) * 1986-07-11 1988-01-28 Fox Leslie Z A high-frequency fluorescent lamp
WO1989012905A1 (en) * 1988-06-16 1989-12-28 Hughes Aircraft Company Plasma switch with chrome, perturbated cold cathode
GB2244855A (en) * 1990-03-31 1991-12-11 Smiths Industries Plc Gas discharge electrodes.

Also Published As

Publication number Publication date
GB9315708D0 (en) 1993-09-15
GB2269700A (en) 1994-02-16

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19970729