GB814936A - Operating circuits for electric discharge lamps - Google Patents
Operating circuits for electric discharge lampsInfo
- Publication number
- GB814936A GB814936A GB3965957A GB3965957A GB814936A GB 814936 A GB814936 A GB 814936A GB 3965957 A GB3965957 A GB 3965957A GB 3965957 A GB3965957 A GB 3965957A GB 814936 A GB814936 A GB 814936A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- lamp
- winding
- discharge lamps
- relays
- 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
- 238000004804 winding Methods 0.000 abstract 3
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
- H05B41/20—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 no starting switch
- H05B41/23—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 no starting switch for lamps not having an auxiliary starting electrode
- H05B41/231—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 no starting switch for lamps not having an auxiliary starting electrode for high-pressure lamps
Abstract
814,936. Supply systems for space discharge lamps. ENGELHARD INDUSTRIES Inc. Dec. 20, 1957, No. 39659/57. Class 38 (4). A high-pressure gaseous discharge lamp 9 is started by connecting it across the series-connected primary and secondary windings 3, 5 of a transformer 4 and injecting into the circuit, by way of a winding 10, a starting pulse produced by the elements 18, 19, 20, 21, the lamp during normal operation being connected across the secondary winding 5 only. The changeover in the connections is accomplished by means of relays 17, 15, the relay 17 being of the time-delay type. Thus on switching on, the lamp is started on a high voltage by an injected pulse when the spark gap 19 breaks down and after a time delay the contact 16 of relay 17 closes to energize relay 15 whereby the relay 15 operates first to close contact 111 and then to open contact 13 when the lamp 9 is then connected across winding 5 only and operating on a low voltage. In another embodiment the relays 15, 17 are omitted in which case the contacts 11, 13 are operated manually.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB814936A true GB814936A (en) | 1959-06-17 |
Family
ID=1745623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3965957A Expired GB814936A (en) | 1957-12-20 | Operating circuits for electric discharge lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB814936A (en) |
-
1957
- 1957-12-20 GB GB3965957A patent/GB814936A/en not_active Expired
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