GB631730A - Improvements in and relating to circuits for a plurality of electric discharge lamps - Google Patents
Improvements in and relating to circuits for a plurality of electric discharge lampsInfo
- Publication number
- GB631730A GB631730A GB20627/46A GB2062746A GB631730A GB 631730 A GB631730 A GB 631730A GB 20627/46 A GB20627/46 A GB 20627/46A GB 2062746 A GB2062746 A GB 2062746A GB 631730 A GB631730 A GB 631730A
- Authority
- GB
- United Kingdom
- Prior art keywords
- starting
- parallel
- inductance
- lamp
- circuits
- 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
- H05B41/18—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 a starting switch
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
631,730. Control systems for space discharge apparatus. BRITISH THOMSON-HOUSTON CO., Ltd. July 10, 1946, No. 20627. Convention date, July 11, 1945. [Class 38 (iv)] A plurality of discharge or fluorescent lamps 1, the cathodes 2, 2 being filamentary or otherwise, are connected in parallel across an A:C. supply circuit 6, 6 and controlled by a switch 8. Each lamp has a stabilizing inductance 7 in series, and a starting inductance 10 in parallel, with a condenser 13 to give resonance at starting all starting circuits are in parallel and connected across the supply circuit by a switch 12 which is opened after starting. The high impedance between adjacent lamps ensures stability at starting. The condensers 13 may be arranged in the starting circuit 9 or in the lamp circuit 5 and both arrangements may be run in parallel. Windings for supplying filament heating currents may be placed on the inductances 10, which may have a core in common with the inductance 7 for the same lamp. Specification 569,685, [Group XL], is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US631730XA | 1945-07-11 | 1945-07-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB631730A true GB631730A (en) | 1949-11-09 |
Family
ID=22047430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB20627/46A Expired GB631730A (en) | 1945-07-11 | 1946-07-10 | Improvements in and relating to circuits for a plurality of electric discharge lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB631730A (en) |
-
1946
- 1946-07-10 GB GB20627/46A patent/GB631730A/en not_active Expired
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