GB847417A - Improvements relating to electric discharge lamp circuits - Google Patents
Improvements relating to electric discharge lamp circuitsInfo
- Publication number
- GB847417A GB847417A GB4272/58A GB427258A GB847417A GB 847417 A GB847417 A GB 847417A GB 4272/58 A GB4272/58 A GB 4272/58A GB 427258 A GB427258 A GB 427258A GB 847417 A GB847417 A GB 847417A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistors
- winding
- discharge lamp
- feb
- feed back
- 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
- H05B41/26—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
-
- 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
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
847,417. Transistor inverter circuits. BRITISH THOMSON-HOUSTON CO. Ltd. Feb. 6, 1959 [Feb. 10, 1958], No. 4272/58. Class 40(6). [Also in Group XXXV] A transistor inverter comprises transistors 4, 5 connected to the centre tapped primary winding 7 and the feed back winding 8 of a high reactance transformer, the secondary winding 12, 14 of which supplies a low pressure discharge lamp 13, 15. Bias to the transistors is provided by a resistor 10 and capacitor 11 connected across a battery 6 and to the centre top of the feed back winding. Closing a switch 6 connects the positive battery terminal to the transistor emitter electrodes producing a bias voltage across the base and emitter electrodes. One of the transistors became conductive before the other thus oscillations commence. The circuit frequency increases with battery voltage and with secondary load.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4272/58A GB847417A (en) | 1958-02-10 | 1958-02-10 | Improvements relating to electric discharge lamp circuits |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4272/58A GB847417A (en) | 1958-02-10 | 1958-02-10 | Improvements relating to electric discharge lamp circuits |
Publications (1)
Publication Number | Publication Date |
---|---|
GB847417A true GB847417A (en) | 1960-09-07 |
Family
ID=9773987
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4272/58A Expired GB847417A (en) | 1958-02-10 | 1958-02-10 | Improvements relating to electric discharge lamp circuits |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB847417A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1126031B (en) * | 1960-12-28 | 1962-03-22 | Licentia Gmbh | Circuit arrangement for low-voltage fluorescent lamps that are fed from a vehicle battery or a similar direct voltage source |
US3457457A (en) * | 1966-10-19 | 1969-07-22 | Automatic Displays Inc | Illuminating control means |
US4150323A (en) * | 1975-10-01 | 1979-04-17 | Sonca Industries Ltd. | Intensity control of fluorescent lamps |
-
1958
- 1958-02-10 GB GB4272/58A patent/GB847417A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1126031B (en) * | 1960-12-28 | 1962-03-22 | Licentia Gmbh | Circuit arrangement for low-voltage fluorescent lamps that are fed from a vehicle battery or a similar direct voltage source |
US3457457A (en) * | 1966-10-19 | 1969-07-22 | Automatic Displays Inc | Illuminating control means |
US4150323A (en) * | 1975-10-01 | 1979-04-17 | Sonca Industries Ltd. | Intensity control of fluorescent lamps |
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