GB504432A - Improvements in high-pressure mercury-vapour electric discharge lamps - Google Patents
Improvements in high-pressure mercury-vapour electric discharge lampsInfo
- Publication number
- GB504432A GB504432A GB21259/38A GB2125938A GB504432A GB 504432 A GB504432 A GB 504432A GB 21259/38 A GB21259/38 A GB 21259/38A GB 2125938 A GB2125938 A GB 2125938A GB 504432 A GB504432 A GB 504432A
- Authority
- GB
- United Kingdom
- Prior art keywords
- impedance
- run
- series
- supply
- pressure
- 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
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
- H01J61/822—High-pressure mercury lamps
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/56—One or more circuit elements structurally associated with the lamp
-
- 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
- H05B41/19—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 for lamps having an auxiliary starting electrode
Landscapes
- Discharge Lamps And Accessories Thereof (AREA)
Abstract
504,432. Supply system for discharge lamps. GENERAL ELECTRIC CO., Ltd. July 18, 1938, No. 21259. Convention date, July 28, 1937. [Class 39 (i)] [Also in Group XXXV] A high - pressure mercuryvapour discharge lamp is. run at a watt loss per centimetre which exceeds 30 whereby it has a positive characteristic and may be run directly from the supply or in series with a resistance which does not take more than 10 per cent of the supply voltage. Such a lamp 2 is con. nected in series with an impedance 8 during starting and running up, this impedance being wholly or partly shortcircuited by a bimetal switch 10. A separate small series impedance may or may not be provided. Alternatively, the series impedance may be constituted by a negative temperature coefficient resistor so that after running up its resistance has the requisite very low or zero value. If a finite small series impedance is used it may be constituted by the usual iron wire in hydrogen. The speed of run up may be increased. by utilizing the heating effect of the starting impedance. The run up period may be avoided by including a filling of a gas at a pressure such that a high-pressure discharge is started in which case auxiliary starting means are used such as h.f. voltage or contacting electrodes. A.C. or D.C. supply may be used. Some or all of the elements may be enclosed in the outer envelope 1 surrounding the discharge lamp 2.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE504432X | 1937-07-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB504432A true GB504432A (en) | 1939-04-25 |
Family
ID=6546196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB21259/38A Expired GB504432A (en) | 1937-07-28 | 1938-07-18 | Improvements in high-pressure mercury-vapour electric discharge lamps |
Country Status (3)
| Country | Link |
|---|---|
| FR (1) | FR841166A (en) |
| GB (1) | GB504432A (en) |
| NL (2) | NL89044B (en) |
-
0
- NL NL54030D patent/NL54030C/xx active
- NL NL89044D patent/NL89044B/xx unknown
-
1938
- 1938-07-18 GB GB21259/38A patent/GB504432A/en not_active Expired
- 1938-07-25 FR FR841166D patent/FR841166A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL89044B (en) | |
| NL54030C (en) | |
| FR841166A (en) | 1939-05-12 |
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