GB810754A - Improvements in or relating to discharge tube circuit arrangements - Google Patents
Improvements in or relating to discharge tube circuit arrangementsInfo
- Publication number
- GB810754A GB810754A GB36076/56A GB3607656A GB810754A GB 810754 A GB810754 A GB 810754A GB 36076/56 A GB36076/56 A GB 36076/56A GB 3607656 A GB3607656 A GB 3607656A GB 810754 A GB810754 A GB 810754A
- Authority
- GB
- United Kingdom
- Prior art keywords
- voltage
- electrodes
- circuit
- vibrator unit
- choke
- 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
- H05B41/14—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
- H05B41/18—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 a starting switch
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
810,754. Supply systems for discharge lamps. PHILIPS ELECTRICAL INDUSTRIES Ltd. Nov. 26, 1956 [Nov. 29, 1955], No. 36076/56. Class 38 (4). In a circuit wherein'one or more hot cathode discharge tubes 12 are supplied from a vibrator unit 1-8 through a harmonic reducing filter 9, 10, an auxiliary load is connected to the circuit to limit the open-circuit voltage and prevent premature starting before the electrodes are heated. In the Figure, a choke 16 of at least six times the tube impedance is connected across the electrodes 13, 14. After switching on the vibrator unit, and before glow switches 15 close, the current drawn by chokes 16 heats electrodes 13, 14, also loads the vibrator unit sufficiently to limit the terminal voltage to a value below the striking voltage. In another arrangement an auxiliary discharge tube having a striking voltage below the unloaded vibrator voltage and an extinction voltage above the glow switch closing voltage is used in place of the choke 16.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL810754X | 1955-11-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB810754A true GB810754A (en) | 1959-03-25 |
Family
ID=19838660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB36076/56A Expired GB810754A (en) | 1955-11-29 | 1956-11-26 | Improvements in or relating to discharge tube circuit arrangements |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB810754A (en) |
-
1956
- 1956-11-26 GB GB36076/56A patent/GB810754A/en not_active Expired
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