GB755776A - Improvements in or relating to electric circuits for starting and operating fluorescent lamps - Google Patents
Improvements in or relating to electric circuits for starting and operating fluorescent lampsInfo
- Publication number
- GB755776A GB755776A GB14283/54A GB1428354A GB755776A GB 755776 A GB755776 A GB 755776A GB 14283/54 A GB14283/54 A GB 14283/54A GB 1428354 A GB1428354 A GB 1428354A GB 755776 A GB755776 A GB 755776A
- Authority
- GB
- United Kingdom
- Prior art keywords
- winding
- lamp
- impedance
- extension
- starting
- 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
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
- H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
- H05B41/20—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch
- H05B41/23—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode
- H05B41/232—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode for low-pressure lamps
- H05B41/2325—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode for low-pressure lamps provided with pre-heating electrodes
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
755,776. Supply systems for space discharge lamps. TELEFONAKTIEBOLAGET L. M. ERICSSON. May 14, 1954 [May 16, 1953], No. 14283/54. Class 38 (4). A fluorescent electric discharge lamp starting and operating circuit, comprising a filamentary preheatable electrode gas-discharge lamp 1 serially connected with an inductive ballast winding 4 across A.C. source terminals A, B, in parallel with a similar lamp 2 serially connected with an inductive ballast winding 5 and at least one condenser 6 across said source terminals, is provided with an electrode heating transformer 8 for heating one or both electrodes 3 of each lamp at least during starting thereof, the primary winding of the transformer 8 being connected to the source terminals A, B, respectively through a part only of the first winding 4 and at least through an impedance, as shown, an extension of the second winding 5; the voltage appearing across the impedance is arranged to be dependent upon the current passing through the second lamp 2 and the value of the impedance is such that the primary winding voltage when the lamps are operating is less than that across terminals A, B or is substantially zero, whereby the electrode heating current is reduced from the value obtaining before the lamps started running. In modifications various arrangements and connections of the winding 5, its extension and the condenser 6 are described, and a further condenser 6 may replace the extension of winding 5.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE755776X | 1953-05-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB755776A true GB755776A (en) | 1956-08-29 |
Family
ID=20326594
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB14283/54A Expired GB755776A (en) | 1953-05-16 | 1954-05-14 | Improvements in or relating to electric circuits for starting and operating fluorescent lamps |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB755776A (en) |
-
1954
- 1954-05-14 GB GB14283/54A patent/GB755776A/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB755776A (en) | Improvements in or relating to electric circuits for starting and operating fluorescent lamps | |
GB919753A (en) | Circuit arrangement for energizing electric discharge devices | |
ES267433A1 (en) | High frequency lighting systems and ballast circuits therefor | |
GB1317661A (en) | Circuit arrangements for dimming discharge lamps | |
GB760674A (en) | Improvements relating to starting circuits for electric discharge lamps | |
GB713734A (en) | Improvements in supply circuits for electric discharge tubes | |
GB739045A (en) | Improvements in dimming circuits for electric discharge lamps | |
GB762489A (en) | Improvements in or relating to electric circuit arrangements for starting and operating at least one low pressure electric discharge lamp | |
GB723932A (en) | Improvements relating to circuit arrangements for starting and operating hot-cathodeelectric discharge lamps | |
GB639295A (en) | Improvements in supply circuits for electric discharge tubes | |
GB912181A (en) | Improvements in or relating to circuit arrangements for fluorescent lamps | |
GB757080A (en) | Improvements in and relating to operating circuits for electric discharge lamps | |
GB720264A (en) | Improvements in operating circuits for electric discharge lamps | |
GB587660A (en) | Circuit arrangements for electric discharge lamps | |
GB828750A (en) | Improvements in circuits for electric discharge lamps | |
GB703255A (en) | Improvements in electric circuit arrangements for operating low pressure electric discharge lamps having preheatable electrodes | |
GB567377A (en) | Improved circuit arrangement for operating electric discharge lamps | |
GB786067A (en) | Improvements in or relating to electric circuit arrangements for operating gas or vapour filled electric discharge lamps | |
GB730024A (en) | Improvements in or relating to circuit arrangements for operating electric dischargelamps having heatable electrodes | |
GB830202A (en) | Improvements in or relating to circuit arrangem operating electric lamps | |
GB756431A (en) | Improvements in and relating to circuits for starting and operating electric discharge tubes | |
GB754993A (en) | Improvements in or relating to circuits comprising two gas and/or vapour filled electric discharge tubes | |
GB712815A (en) | Improvements in or relating to circuits for operating electric discharge lamps | |
GB782854A (en) | Improvements in and relating to electric discharge tube circuits | |
GB772525A (en) | Improvements in or relating to circuit arrangements comprising gas and/or vapour filled electric discharge tubes |