GB2318932B - Fluorescent lamp failure warning system - Google Patents

Fluorescent lamp failure warning system

Info

Publication number
GB2318932B
GB2318932B GB9714763A GB9714763A GB2318932B GB 2318932 B GB2318932 B GB 2318932B GB 9714763 A GB9714763 A GB 9714763A GB 9714763 A GB9714763 A GB 9714763A GB 2318932 B GB2318932 B GB 2318932B
Authority
GB
United Kingdom
Prior art keywords
fluorescent lamp
warning system
failure warning
lamp failure
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 - Fee Related
Application number
GB9714763A
Other versions
GB2318932A (en
GB9714763D0 (en
Inventor
Robert Joseph Desbois
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.)
LAB CRAFT Ltd
Original Assignee
LAB CRAFT Ltd
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 LAB CRAFT Ltd filed Critical LAB CRAFT Ltd
Publication of GB9714763D0 publication Critical patent/GB9714763D0/en
Publication of GB2318932A publication Critical patent/GB2318932A/en
Application granted granted Critical
Publication of GB2318932B publication Critical patent/GB2318932B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H05B41/295—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 and specially adapted for lamps with preheating electrodes, e.g. for fluorescent lamps
    • H05B41/298—Arrangements for protecting lamps or circuits against abnormal operating conditions
    • H05B41/2981—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
    • H05B41/2985—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal lamp operating conditions
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20—Responsive to malfunctions or to light source life; for protection
GB9714763A 1996-11-01 1997-07-15 Fluorescent lamp failure warning system Expired - Fee Related GB2318932B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB9622768.1A GB9622768D0 (en) 1996-11-01 1996-11-01 Fluorescent lamp failure warning device

Publications (3)

Publication Number Publication Date
GB9714763D0 GB9714763D0 (en) 1997-09-17
GB2318932A GB2318932A (en) 1998-05-06
GB2318932B true GB2318932B (en) 2000-09-06

Family

ID=10802290

Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB9622768.1A Pending GB9622768D0 (en) 1996-11-01 1996-11-01 Fluorescent lamp failure warning device
GB9714763A Expired - Fee Related GB2318932B (en) 1996-11-01 1997-07-15 Fluorescent lamp failure warning system

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB9622768.1A Pending GB9622768D0 (en) 1996-11-01 1996-11-01 Fluorescent lamp failure warning device

Country Status (1)

Country Link
GB (2) GB9622768D0 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2326543B (en) 1997-06-19 1999-12-08 Toshiba Lighting & Technology Lighting apparatus
GB2405734B (en) * 2003-09-04 2006-03-15 Sandra Hardy Light Bulb
WO2009062552A1 (en) * 2007-11-15 2009-05-22 Osram Gesellschaft mit beschränkter Haftung Apparatus and method for testing of wiring for at least one discharge lamp

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4616158A (en) * 1982-12-23 1986-10-07 Siemens Aktiengesellschaft Arrangement for shutting off an inverter
US4667131A (en) * 1984-05-18 1987-05-19 Nilssen Ole K Protection circuit for fluorescent lamp ballasts
US4949013A (en) * 1988-02-22 1990-08-14 Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen M.B.H. High-frequency operating circuit for a fluorescent lamp
EP0422594A1 (en) * 1989-10-12 1991-04-17 Honeywell Inc. Alternating cathode fluorescent lamp dimmer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4616158A (en) * 1982-12-23 1986-10-07 Siemens Aktiengesellschaft Arrangement for shutting off an inverter
US4667131A (en) * 1984-05-18 1987-05-19 Nilssen Ole K Protection circuit for fluorescent lamp ballasts
US4949013A (en) * 1988-02-22 1990-08-14 Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen M.B.H. High-frequency operating circuit for a fluorescent lamp
EP0422594A1 (en) * 1989-10-12 1991-04-17 Honeywell Inc. Alternating cathode fluorescent lamp dimmer

Also Published As

Publication number Publication date
GB2318932A (en) 1998-05-06
GB9714763D0 (en) 1997-09-17
GB9622768D0 (en) 1997-01-08

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Legal Events

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

Effective date: 20060715