GB600495A - Improvements in and relating to high pressure metal vapour electric discharge lamps - Google Patents
Improvements in and relating to high pressure metal vapour electric discharge lampsInfo
- Publication number
- GB600495A GB600495A GB2468245A GB2468245A GB600495A GB 600495 A GB600495 A GB 600495A GB 2468245 A GB2468245 A GB 2468245A GB 2468245 A GB2468245 A GB 2468245A GB 600495 A GB600495 A GB 600495A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mms
- per cent
- cadmium
- less
- zinc
- 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
- 229910052751 metal Inorganic materials 0.000 title abstract 4
- 239000002184 metal Substances 0.000 title abstract 4
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 abstract 5
- 229910052793 cadmium Inorganic materials 0.000 abstract 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract 4
- 229910052725 zinc Inorganic materials 0.000 abstract 4
- 239000011701 zinc Substances 0.000 abstract 4
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 abstract 3
- 229910052753 mercury Inorganic materials 0.000 abstract 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 abstract 2
- 229910052786 argon Inorganic materials 0.000 abstract 1
- 230000004323 axial length Effects 0.000 abstract 1
- 239000011521 glass Substances 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
- H01J61/84—Lamps with discharge constricted by high pressure
- H01J61/86—Lamps with discharge constricted by high pressure with discharge additionally constricted by close spacing of electrodes, e.g. for optical projection
Landscapes
- Discharge Lamp (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
Abstract
600,495. Discharge lamps. GENERAL ELECTRIC CO., Ltd., FRANCIS, V..J., and NELSON, E. H. Sept. 24, 1945, Nos. 24682/45, 32398/45 and 18427/46. [Class 39 (i)] A high-pressure metal vapour discharge lamp with a filling of mercury with cadmium and/or zinc is constructed to satisfy the following conditions. Where W is the voltage dissipated, A the internal area of the envelope, L the distance between the running electrodes. W (1) - is not less than 10 watts per square A centimetre if the filling comprises cadmium and not less than 15 watts per square centimetre if the filling comprises zinc without cadmium. W (2) - is not less than 250 watts per cm. L (3) The true efficiency is not less than the minimum for wattage W as defined in the Specification, e.g. 20 lumens per watt at 500 watts. (4) The quantity of mercury is so small that the light emitted has a red ratio of not less than 8 per cent. Fig. 2 shows such a lamp adapted to dissipate 1 kilowatt and to operate from 230 volt A.C. mains wherein the envelope 1 is 2 mms. thick, the greatest width is 40 mms., axial length is 50 mms., and the distance between the electrodes 2, 2<1> consisting of tungsten rods 3 mms. diameter with starting electrodes 3, 3<1> held in grooves by coils 4, 4<1> is 25 mms. The lamp is supported from a metal frame 6, which is supported from a hard glass outer jacket 7. The metal filling contains 60 per cent mercury, 40 per cent cadmium or 40 per cent zinc or 20 per cent cadmium and 20 per cent zinc, and a very small amount of argon. Specification 485,489 is referred to.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE473869D BE473869A (en) | 1945-09-24 | ||
| FR947714D FR947714A (en) | 1945-09-24 | 1947-06-07 | High pressure metal vapor electric discharge lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB600495A true GB600495A (en) | 1948-04-09 |
Family
ID=1738565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2468245A Expired GB600495A (en) | 1945-09-24 | 1945-09-24 | Improvements in and relating to high pressure metal vapour electric discharge lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB600495A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0623945A2 (en) * | 1993-05-07 | 1994-11-09 | Ushiodenki Kabushiki Kaisha | Discharge lamp |
| EP0869537A1 (en) * | 1997-04-04 | 1998-10-07 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | DC arc lamp |
| US6054811A (en) * | 1997-04-04 | 2000-04-25 | Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen M.B.H. | Direct-current short-ARC discharge lamp |
-
1945
- 1945-09-24 GB GB2468245A patent/GB600495A/en not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0623945A2 (en) * | 1993-05-07 | 1994-11-09 | Ushiodenki Kabushiki Kaisha | Discharge lamp |
| EP0623945A3 (en) * | 1993-05-07 | 1995-10-18 | Ushio Electric Inc | Discharge lamp. |
| EP0869537A1 (en) * | 1997-04-04 | 1998-10-07 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | DC arc lamp |
| US6051929A (en) * | 1997-04-04 | 2000-04-18 | Patent-Treuhand-Gesellschaft Fur Elecktrische Gluhlampen M.B.H. | Direct-current arc lamp |
| US6054811A (en) * | 1997-04-04 | 2000-04-25 | Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen M.B.H. | Direct-current short-ARC discharge lamp |
| EP1069594A2 (en) * | 1997-04-04 | 2001-01-17 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | DC arc Lamp |
| EP1069594A3 (en) * | 1997-04-04 | 2001-03-21 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | DC arc Lamp |
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