GB398824A - Improvements in electric discharge lamps - Google Patents
Improvements in electric discharge lampsInfo
- Publication number
- GB398824A GB398824A GB22696/33A GB2269633A GB398824A GB 398824 A GB398824 A GB 398824A GB 22696/33 A GB22696/33 A GB 22696/33A GB 2269633 A GB2269633 A GB 2269633A GB 398824 A GB398824 A GB 398824A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamp
- lamps
- group
- filling
- dec
- 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
- H05B41/20—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
- H05B41/232—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 low-pressure lamps
Landscapes
- Discharge Lamps And Accessories Thereof (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
398,824. Discharge lamps. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Spanner, H. J. ; 117, Chausseestrasse, Berlin.) Dec. 19, 1931, No. 22696/33. Convention date, Dec. 20, 1930. Divided on 398,799, [Group XL.] [Class 38 (iv).] A source of light comprises two lamps of the type described in Specification 397,162, [Group XL], provided with cathodes of the type described in Specification 356,234, [Group XL], connected in parallel, and the starting voltage of one lamp is greater than both starting and normal running potentials of the other. If one lamp has a filling of argon in addition to metal vapour, the other lamp may be given a higher starting potential by adding iodine, neon or helium to the filling. The lamps may be mounted in a common reflector. According to the Specification as open to inspection under Sect. 91, each lamp, instead of being of the type set forth above has the following characteristics: (1) The electrodes are oxide coated and are preferably heated by the discharge only; (2) the filling consists of a mixture of rare gas with mercury and possibly other metal vapour; (3) the operating temperature of the lamp is greatly above atmospheric, and the device will start without auxiliary means on a supply circuit of about 220 volts. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE398824X | 1930-12-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB398824A true GB398824A (en) | 1933-09-19 |
Family
ID=6397412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB22696/33A Expired GB398824A (en) | 1930-12-20 | 1931-12-19 | Improvements in electric discharge lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB398824A (en) |
-
1931
- 1931-12-19 GB GB22696/33A patent/GB398824A/en not_active Expired
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