GB543171A - Improvements in operating circuit arrangements for electric discharge devices - Google Patents
Improvements in operating circuit arrangements for electric discharge devicesInfo
- Publication number
- GB543171A GB543171A GB1215/41A GB121541A GB543171A GB 543171 A GB543171 A GB 543171A GB 1215/41 A GB1215/41 A GB 1215/41A GB 121541 A GB121541 A GB 121541A GB 543171 A GB543171 A GB 543171A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contact
- lamp
- reduces
- heating
- electric discharge
- 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
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
543,171. Electric supply to discharge apparatus. BRITISH THOMSON-HOUSTON CO., Ltd. Jan. 30, 1941, No. 1215. Convention date, Feb. 1, 1940. [Class 38 (iv)] [Also in Group XL] The pre-heated electrodes of a discharge device, e.g. a lamp, are supplied through the heating element 13 of a thermal switch 10, the contact member 11 of which bends under time delay and breaks contact at 12 thereby putting the full voltage on the lamp and starting it. When fully bent, the contact-member engages with the contact 14 which introduces the resistance 15 in parallel with the heater 13 and reduces the heating of 13 to the minimum so that the contact member is in an unstable position ready, withbut delay, to re-connect the filaments for direct heating in case the lamp goes out. The parallel resistance 15 also reduces flicher with each operation of the thermal switch in normal operation. Specification 384,626, [Group XL], is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US543171XA | 1940-02-01 | 1940-02-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB543171A true GB543171A (en) | 1942-02-12 |
Family
ID=21990226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1215/41A Expired GB543171A (en) | 1940-02-01 | 1941-01-30 | Improvements in operating circuit arrangements for electric discharge devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB543171A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3236852A1 (en) * | 1981-12-29 | 1983-07-14 | Matsushita Electric Works, Ltd., Kadoma, Osaka | IGNITION DEVICE FOR DISCHARGE LAMPS |
-
1941
- 1941-01-30 GB GB1215/41A patent/GB543171A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3236852A1 (en) * | 1981-12-29 | 1983-07-14 | Matsushita Electric Works, Ltd., Kadoma, Osaka | IGNITION DEVICE FOR DISCHARGE LAMPS |
| US4461976A (en) * | 1981-12-29 | 1984-07-24 | Matsushita Electric Works, Ltd. | Discharge lamp starter |
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