GB661791A - Improved starting arrangements for electric discharge lamps - Google Patents
Improved starting arrangements for electric discharge lampsInfo
- Publication number
- GB661791A GB661791A GB990249A GB990249A GB661791A GB 661791 A GB661791 A GB 661791A GB 990249 A GB990249 A GB 990249A GB 990249 A GB990249 A GB 990249A GB 661791 A GB661791 A GB 661791A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contacts
- lamps
- circuit
- preheating
- relay
- 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
- H05B41/02—Details
- H05B41/04—Starting switches
- H05B41/06—Starting switches thermal only
Landscapes
- Discharge Lamps And Accessories Thereof (AREA)
Abstract
661,791. Control systems for space discharge. lamps. VAUGHAN, C. H., and GRAHAM & CO., Ltd.,. A. April 6, 1950 [April 12, 1949], No. 9902/49. [Class 38 (iv)] A starting arrangement for one or several series-connected discharge lamps L1, L2, having filamentary electrodes, includes a thermal switch having a resistance heater HW and normally-closed contacts bm to provide the time delay for preheating and an electromagnetic relay having an operating coil R and contacts r1-r4 to obtain rapid interruption of the preheating circuit and so ensure a high voltage pulse to start the lamps, the arrangement being such that upon connection to the supply, contacts bm open under delay to remove the short-circuit on relay coil R, thereby causing the contacts r2, r3 to open, r4 to close and so short-circuit the resistance heater and r1 to open and so disconnect contacts bm, which eventually reclose. The relay will continue to re-operate immediately until the lamp starts or contacts bm reclose, whereupon the preheating cycle will repeat. The invention operates from A.C. or D.C. The voltage pulse in the latter case may be obtained from the relay coil, instead of from an inductance in series with the ballast resistance B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB990249A GB661791A (en) | 1949-04-12 | 1949-04-12 | Improved starting arrangements for electric discharge lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB990249A GB661791A (en) | 1949-04-12 | 1949-04-12 | Improved starting arrangements for electric discharge lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB661791A true GB661791A (en) | 1951-11-28 |
Family
ID=9880908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB990249A Expired GB661791A (en) | 1949-04-12 | 1949-04-12 | Improved starting arrangements for electric discharge lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB661791A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1025529B (en) * | 1956-11-16 | 1958-03-06 | Bbc Brown Boveri & Cie | Delay circuit for switching on the anode voltage in gas discharge tubes by means of a thermal switch |
| DE1029476B (en) * | 1954-05-31 | 1958-05-08 | Gottlob Widmann & Soehne Komma | Ignition and operating device for electric discharge lamps |
| DE1035768B (en) * | 1954-05-31 | 1958-08-07 | Gottlob Widmann & Soehne K G | Ignition and operating device for electric discharge lamps with preheatable glow cathodes |
| DE1073624B (en) * | 1960-01-21 | Gottlieb Widmann 6. Söhne Kommanditgesellschaft, Schwenningen/Neckar | Ignition and operating equipment for electric discharge lamps with preheatable hot cathodes |
-
1949
- 1949-04-12 GB GB990249A patent/GB661791A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1073624B (en) * | 1960-01-21 | Gottlieb Widmann 6. Söhne Kommanditgesellschaft, Schwenningen/Neckar | Ignition and operating equipment for electric discharge lamps with preheatable hot cathodes | |
| DE1029476B (en) * | 1954-05-31 | 1958-05-08 | Gottlob Widmann & Soehne Komma | Ignition and operating device for electric discharge lamps |
| DE1035768B (en) * | 1954-05-31 | 1958-08-07 | Gottlob Widmann & Soehne K G | Ignition and operating device for electric discharge lamps with preheatable glow cathodes |
| DE1025529B (en) * | 1956-11-16 | 1958-03-06 | Bbc Brown Boveri & Cie | Delay circuit for switching on the anode voltage in gas discharge tubes by means of a thermal switch |
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