GB502585A - Improvements in sources of light comprising electric discharge lamps - Google Patents
Improvements in sources of light comprising electric discharge lampsInfo
- Publication number
- GB502585A GB502585A GB7388/38A GB738838A GB502585A GB 502585 A GB502585 A GB 502585A GB 7388/38 A GB7388/38 A GB 7388/38A GB 738838 A GB738838 A GB 738838A GB 502585 A GB502585 A GB 502585A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamps
- filament
- terminal
- choke
- envelope
- 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
- 239000000463 material Substances 0.000 abstract 2
- 229910052751 metal Inorganic materials 0.000 abstract 2
- 239000002184 metal Substances 0.000 abstract 2
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 230000005855 radiation Effects 0.000 abstract 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract 1
- 229910052721 tungsten Inorganic materials 0.000 abstract 1
- 239000010937 tungsten Substances 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/96—Lamps with light-emitting discharge path and separately-heated incandescent body within a common envelope, e.g. for simulating daylight
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
- Discharge Lamp (AREA)
Abstract
502,585. Metal-vapour lamps. GENERAL ELECTRIC CO., Ltd. (Patent- Treuhand-Ges. f³r Elektrische Gl³hlampen) March 9, 1938, No. 7388. [Class 39 (i)] [Also in Group XXXV] A number of high-pressure metal vapour lamps and an incandescent filament are contained in a common envelope, one terminal of each of the lamps and one terminal of the incandescent filament being all connected together and the other terminal of the filament and the lamps being separated from each other, so that the lamps can be supplied with alternating currents displaced in phase relatively to one another, all of which pass through the filament. The common envelope may be coated with phosphorescent material excited by the radiation from the lamps. An arrangement is shown in Fig. 1 comprising an outer envelope 2, coated with phosphorescent material 3 and containing two high-pressure metal vapour lamps 4, 5 inclined in opposite directions at 45‹ to the axis of the envelope and a tungsten filament 6 lying in the axis thereof. The lamps have thermionic electrodes 7 heated by the discharge and starting electrodes 8. The lower end 11 of the filament and the two lower electrodes 7 of the lamps are connected together, while the other electrodes and the other terminal of the filament are connected to separate contacts 10, 12, 13. Fig. 2 shows a circuit arrangement in which the filament contact 10 is connected directly to one terminal of the A.C. supply, the contact 12 of one lamp to the other terminal of the supply through a choke 15 and the contact 13 to the same supply terminal through a condenser 16 and choke 17. The contacts 10 and 12 may be connected through a condenser 18. The impedance of the choke 17 is preferably less, but only slightly less, than the impedance of the condenser 16, and 'the condenser 18 is so adjusted that the discharge through the lamps 4 and 5 are approximately equal. In a modification, the choke 17 may be formed as part of the choke 15. The discharge lamps may have a common discharge envelope.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1938P0076864 DE688611C (en) | 1938-02-26 | 1938-02-26 | Electric high-pressure mercury discharge lamp |
| GB7388/38A GB502585A (en) | 1938-02-26 | 1938-03-09 | Improvements in sources of light comprising electric discharge lamps |
| FR850606D FR850606A (en) | 1938-02-26 | 1939-02-20 | High pressure mercury vapor electric lamp |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1938P0076864 DE688611C (en) | 1938-02-26 | 1938-02-26 | Electric high-pressure mercury discharge lamp |
| GB7388/38A GB502585A (en) | 1938-02-26 | 1938-03-09 | Improvements in sources of light comprising electric discharge lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB502585A true GB502585A (en) | 1939-03-21 |
Family
ID=25991004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7388/38A Expired GB502585A (en) | 1938-02-26 | 1938-03-09 | Improvements in sources of light comprising electric discharge lamps |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE688611C (en) |
| FR (1) | FR850606A (en) |
| GB (1) | GB502585A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5586063A (en) * | 1978-12-22 | 1980-06-28 | Mitsubishi Electric Corp | Discharge lamp |
-
1938
- 1938-02-26 DE DE1938P0076864 patent/DE688611C/en not_active Expired
- 1938-03-09 GB GB7388/38A patent/GB502585A/en not_active Expired
-
1939
- 1939-02-20 FR FR850606D patent/FR850606A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR850606A (en) | 1939-12-21 |
| DE688611C (en) | 1940-02-26 |
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