GB605928A - Improvements in starting arrangements for thermionic discharge lamps - Google Patents
Improvements in starting arrangements for thermionic discharge lampsInfo
- Publication number
- GB605928A GB605928A GB2391846A GB2391846A GB605928A GB 605928 A GB605928 A GB 605928A GB 2391846 A GB2391846 A GB 2391846A GB 2391846 A GB2391846 A GB 2391846A GB 605928 A GB605928 A GB 605928A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- contact
- lamp
- operate
- over contact
- 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
- H05B41/10—Starting switches magnetic only
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
605,928. Supply systems for space-discharge apparatus. GENERAL ELECTRIC CO., Ltd., and HALLIDAY, V. N. Aug. 13, 1946, No. 23918. [Class 38 (iv)] To obtain a starting arrangement for a thermionic discharge lamp, operable over a wide range of supply voltage, two electromagnetic relays are used, one being connected across the supply and the other in series with the lamp. The starting period is substantially equal to the sum of the operate and release times of one relay, plus the operate time of the other relay. In the D.C. arrangement shown, switch S completes a pre-heating circuit L through the serially-connected opposed windings of relay A, contact A1, and inductive ballast D. Relay B is slow to operate and to release and is energized over contact A2; after a predetermined time, it short circuits one winding of relay A. over contact B1 and provides an alternative heating circuit over contact B2. Relay A operates with delay, due to its short-circuited winding, to open its contacts A1 and A2. The latter de-energizes relay B, which later opens its contact B2 to cause the lamp to strike. For A.C. operation the relay windings are shunted by rectifiers and the circuit of relay B includes a series resistor. An interference suppressing condenser C may be connected across the lamp over contact A1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2391846A GB605928A (en) | 1946-08-13 | 1946-08-13 | Improvements in starting arrangements for thermionic discharge lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2391846A GB605928A (en) | 1946-08-13 | 1946-08-13 | Improvements in starting arrangements for thermionic discharge lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB605928A true GB605928A (en) | 1948-08-03 |
Family
ID=10203397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2391846A Expired GB605928A (en) | 1946-08-13 | 1946-08-13 | Improvements in starting arrangements for thermionic discharge lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB605928A (en) |
-
1946
- 1946-08-13 GB GB2391846A patent/GB605928A/en not_active Expired
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