GB2305540B - Gas discharge lamps and systems - Google Patents

Gas discharge lamps and systems

Info

Publication number
GB2305540B
GB2305540B GB9618088A GB9618088A GB2305540B GB 2305540 B GB2305540 B GB 2305540B GB 9618088 A GB9618088 A GB 9618088A GB 9618088 A GB9618088 A GB 9618088A GB 2305540 B GB2305540 B GB 2305540B
Authority
GB
United Kingdom
Prior art keywords
systems
gas discharge
discharge lamps
lamps
gas
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
GB9618088A
Other versions
GB2305540A (en
GB9618088D0 (en
Inventor
Peter Michael Tyler
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 GBGB9519283.7A external-priority patent/GB9519283D0/en
Application filed by Smiths Group PLC filed Critical Smiths Group PLC
Priority to GB9618088A priority Critical patent/GB2305540B/en
Publication of GB9618088D0 publication Critical patent/GB9618088D0/en
Publication of GB2305540A publication Critical patent/GB2305540A/en
Application granted granted Critical
Publication of GB2305540B publication Critical patent/GB2305540B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
    • H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/64—Cathode glow lamps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/92—Lamps with more than one main discharge path
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/39—Controlling the intensity of light continuously
    • H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
    • H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations
    • H05B41/3927—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations by pulse width modulation
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/40—Controlling the intensity of light discontinuously
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
GB9618088A 1995-09-21 1996-08-29 Gas discharge lamps and systems Expired - Lifetime GB2305540B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9618088A GB2305540B (en) 1995-09-21 1996-08-29 Gas discharge lamps and systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9519283.7A GB9519283D0 (en) 1995-09-21 1995-09-21 Gas discharge lamps and systems
GB9618088A GB2305540B (en) 1995-09-21 1996-08-29 Gas discharge lamps and systems

Publications (3)

Publication Number Publication Date
GB9618088D0 GB9618088D0 (en) 1996-10-09
GB2305540A GB2305540A (en) 1997-04-09
GB2305540B true GB2305540B (en) 1999-02-17

Family

ID=26307792

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9618088A Expired - Lifetime GB2305540B (en) 1995-09-21 1996-08-29 Gas discharge lamps and systems

Country Status (1)

Country Link
GB (1) GB2305540B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9803587D0 (en) 1998-02-23 1998-04-15 Smiths Industries Plc Gas discharge lamps and systems

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB236155A (en) * 1924-06-25 1926-03-30 Philips Nv Improvements in or relating to electric gasfilled discharge tubes
GB404448A (en) * 1931-12-24 1934-01-18 Gen Electric Co Ltd Improvements in luminous electric discharge tubes
EP0653903A2 (en) * 1993-11-15 1995-05-17 Meggitt (U.K.) Limited Fluorescent tube assembly and method
US5420481A (en) * 1993-09-27 1995-05-30 Smiths Industries Fluorescent lamp with wide range of luminous intensities

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB236155A (en) * 1924-06-25 1926-03-30 Philips Nv Improvements in or relating to electric gasfilled discharge tubes
GB404448A (en) * 1931-12-24 1934-01-18 Gen Electric Co Ltd Improvements in luminous electric discharge tubes
US5420481A (en) * 1993-09-27 1995-05-30 Smiths Industries Fluorescent lamp with wide range of luminous intensities
EP0653903A2 (en) * 1993-11-15 1995-05-17 Meggitt (U.K.) Limited Fluorescent tube assembly and method

Also Published As

Publication number Publication date
GB2305540A (en) 1997-04-09
GB9618088D0 (en) 1996-10-09

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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

Expiry date: 20160828