GB783631A - Improvements in or relating to electric circuit arrangements for starting and operating low pressure electric discharge lamps - Google Patents
Improvements in or relating to electric circuit arrangements for starting and operating low pressure electric discharge lampsInfo
- Publication number
- GB783631A GB783631A GB431355A GB431355A GB783631A GB 783631 A GB783631 A GB 783631A GB 431355 A GB431355 A GB 431355A GB 431355 A GB431355 A GB 431355A GB 783631 A GB783631 A GB 783631A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- lamps
- starting
- contacts
- winding
- 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
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
783,631. Supply systems for space discharge apparatus. GENERAL ELECTRIC CO., Ltd. Feb. 13, 1956 [Feb. 14, 1955], No. 4313/55. Class 38 (4). A D.C. system for starting and operating lowpressure discharge lamps 1 comprises a relay having a winding 2 in series with the lamps and normally-closed contacts 6 between the electrodes of each lamp so as to complete a heating circuit therefor. When energized, the relay opens its contacts and thereby breaks the current through an inductance (which may be provided by the relay winding) connected in series with the lamps so as to generate a voltage pulse for starting the lamps. The relay does not open its contacts until the current passing through its winding exceeds one-third of the maximum current which would flow therethrough if the contacts were held closed with the circuit connected to a supply at the minimum voltage which will give rise to starting of the lamps. In this manner the relay is prevented from operating before the electrodes have been sufficiently heated, or the lamp is prevented from starting with the electrodes cold. A ballast resistor 3 may be replaced by seriesconnected tungsten filament lamps, or, in some cases, the ballast resistance may be afforded solely by the relay winding. In the event of lamp-failure, repeated operation of the relay is prevented by means of a lock-out switch of the bi-metal type.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB431355A GB783631A (en) | 1955-02-14 | 1955-02-14 | Improvements in or relating to electric circuit arrangements for starting and operating low pressure electric discharge lamps |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB431355A GB783631A (en) | 1955-02-14 | 1955-02-14 | Improvements in or relating to electric circuit arrangements for starting and operating low pressure electric discharge lamps |
Publications (1)
Publication Number | Publication Date |
---|---|
GB783631A true GB783631A (en) | 1957-09-25 |
Family
ID=9774813
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB431355A Expired GB783631A (en) | 1955-02-14 | 1955-02-14 | Improvements in or relating to electric circuit arrangements for starting and operating low pressure electric discharge lamps |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB783631A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109119325A (en) * | 2018-09-27 | 2019-01-01 | 佛山勤顺科技有限公司 | A kind of included ballast and can thermal starting xenon lamp |
-
1955
- 1955-02-14 GB GB431355A patent/GB783631A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109119325A (en) * | 2018-09-27 | 2019-01-01 | 佛山勤顺科技有限公司 | A kind of included ballast and can thermal starting xenon lamp |
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