GB658750A - Improvements in electrical circuits for use with discharge devices - Google Patents
Improvements in electrical circuits for use with discharge devicesInfo
- Publication number
- GB658750A GB658750A GB35377/47A GB3537747A GB658750A GB 658750 A GB658750 A GB 658750A GB 35377/47 A GB35377/47 A GB 35377/47A GB 3537747 A GB3537747 A GB 3537747A GB 658750 A GB658750 A GB 658750A
- Authority
- GB
- United Kingdom
- Prior art keywords
- discharge
- switch
- main
- auxiliary
- circuit
- 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
658,750. Supply systems for space discharge lamps. BRITISH THOMSON-HOUSTON CO., Ltd. Dec. 31, 1947, Nos. 35377 and 35378. Convention dates, Dec. 24, 1946, and July 24, 1947. [Class 38 (iv)] The heating circuit for the thermionic electrodes 2, 3 of a discharge device 1 is separate from the main discharge circuit and arranged to be open - circuited upon initiation of the discharge by a thermal or electromagnetic switch 36 actuated by all or part of the discharge current. The electrodes may be supplied from the secondaries 5, 6 of a heating transformer, the primary 4 of which is connected across the main supply leads through the normally closed contacts 8 of the switch, the actuating coil 7 of which is included in the discharge circuit of the device. To prevent repeated operation of the switch contacts in the event of a faulty discharge device the switch may include a voltage holding coil 37 connected across the main supply leads through contact 38 when the switch is actuated by the discharge current. To facilitate initiation of the discharge an auxiliary electrode 16 may be provided, juxtaposed to the outer wall of the discharge device, with an auxiliary voltage applied between the auxiliary and a main electrode.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR658750X | 1946-12-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB658750A true GB658750A (en) | 1951-10-10 |
Family
ID=9009280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB35377/47A Expired GB658750A (en) | 1946-12-24 | 1947-12-31 | Improvements in electrical circuits for use with discharge devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB658750A (en) |
-
1947
- 1947-12-31 GB GB35377/47A patent/GB658750A/en not_active Expired
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