GB530216A - Improvements in combinations of high-pressure metal-vapour electric discharge lamps with filaments in series with them - Google Patents
Improvements in combinations of high-pressure metal-vapour electric discharge lamps with filaments in series with themInfo
- Publication number
- GB530216A GB530216A GB1910839A GB1910839A GB530216A GB 530216 A GB530216 A GB 530216A GB 1910839 A GB1910839 A GB 1910839A GB 1910839 A GB1910839 A GB 1910839A GB 530216 A GB530216 A GB 530216A
- Authority
- GB
- United Kingdom
- Prior art keywords
- envelope
- discharge
- exceeds
- lamp
- filament
- 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
- H01J61/96—Lamps with light-emitting discharge path and separately-heated incandescent body within a common envelope, e.g. for simulating daylight
Landscapes
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Abstract
530,216. Discharge lamps. GENERAL ELECTRIC CO., Ltd. (Patent-Treuhand-Ges. fur Elektrische Gluhlampen). June 30, 1939, No. 19108. [Class 39 (i)] In a source of light or ultra-violet radiation comprising a high pressure metal vapour discharge lamp and an incandescent filament in series with the discharge and providing the substantial or the whole of the stabilising impedance (i) the filament 4 in full operation does not absorb more than 40 per cent of the applied R.M.S. voltage, (ii) the H.P.M.V. lamp is one wherein (a) the distance L between the electrodes 5 does not exceed 5 mm. and is not greater than their mean distance from the envelope; (b) the mean internal diameter of the approximately spherical envelope 3 does not exceed 15 mm. ; (c) W/L exceeds 200 watt/cm, W being the power in the discharge at full operation ; (d) W/S exceeds 20 watt/sq. cm. S being the internal surface area of the envelope ; (e) the vapour pressure in full operation exceeds 25 atmospheres. As shown the lamp and filament are enclosed in an outer envelope 2 which may be frosted or have a luminescent coating 7; or it may be of material permeable to U.V. A filling of argon and nitrogen may be used in the outer envelope. The discharge envelope 3 may be filled with argon at a pressure up to 400 mm. and mercury which is all evaporated in full working. Current and voltages of a specific construction are given.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1910839A GB530216A (en) | 1939-06-30 | 1939-06-30 | Improvements in combinations of high-pressure metal-vapour electric discharge lamps with filaments in series with them |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1910839A GB530216A (en) | 1939-06-30 | 1939-06-30 | Improvements in combinations of high-pressure metal-vapour electric discharge lamps with filaments in series with them |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB530216A true GB530216A (en) | 1940-12-06 |
Family
ID=10123906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1910839A Expired GB530216A (en) | 1939-06-30 | 1939-06-30 | Improvements in combinations of high-pressure metal-vapour electric discharge lamps with filaments in series with them |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB530216A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2413845A1 (en) * | 1977-12-27 | 1979-07-27 | Gen Electric | MINIATURE DISCHARGE LAMP OPERATING AT HIGH FREQUENCY |
-
1939
- 1939-06-30 GB GB1910839A patent/GB530216A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2413845A1 (en) * | 1977-12-27 | 1979-07-27 | Gen Electric | MINIATURE DISCHARGE LAMP OPERATING AT HIGH FREQUENCY |
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