GB811016A - Activated electrode for electric discharge lamp - Google Patents
Activated electrode for electric discharge lampInfo
- Publication number
- GB811016A GB811016A GB2003/56A GB200356A GB811016A GB 811016 A GB811016 A GB 811016A GB 2003/56 A GB2003/56 A GB 2003/56A GB 200356 A GB200356 A GB 200356A GB 811016 A GB811016 A GB 811016A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rod
- turns
- winding
- emissive material
- strip
- 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 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 4
- 238000004804 winding Methods 0.000 abstract 4
- 239000000126 substance Substances 0.000 abstract 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract 3
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract 2
- 238000010276 construction Methods 0.000 abstract 2
- 239000003870 refractory metal Substances 0.000 abstract 2
- 239000000377 silicon dioxide Substances 0.000 abstract 2
- 239000000725 suspension Substances 0.000 abstract 2
- 229910052721 tungsten Inorganic materials 0.000 abstract 2
- 239000010937 tungsten Substances 0.000 abstract 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 abstract 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 abstract 1
- 239000000020 Nitrocellulose Substances 0.000 abstract 1
- 239000011230 binding agent Substances 0.000 abstract 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 abstract 1
- 239000000292 calcium oxide Substances 0.000 abstract 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 abstract 1
- 239000007772 electrode material Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 abstract 1
- 239000011261 inert gas Substances 0.000 abstract 1
- 229910052743 krypton Inorganic materials 0.000 abstract 1
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 abstract 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 abstract 1
- 229910052753 mercury Inorganic materials 0.000 abstract 1
- 229910052750 molybdenum Inorganic materials 0.000 abstract 1
- 239000011733 molybdenum Substances 0.000 abstract 1
- 229920001220 nitrocellulos Polymers 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000005086 pumping Methods 0.000 abstract 1
- 229910052715 tantalum Inorganic materials 0.000 abstract 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 abstract 1
- ZCUFMDLYAMJYST-UHFFFAOYSA-N thorium dioxide Chemical compound O=[Th]=O ZCUFMDLYAMJYST-UHFFFAOYSA-N 0.000 abstract 1
- 229910003452 thorium oxide Inorganic materials 0.000 abstract 1
- 229910052724 xenon Inorganic materials 0.000 abstract 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 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
- H01J61/02—Details
- H01J61/04—Electrodes; Screens; Shields
- H01J61/06—Main electrodes
- H01J61/073—Main electrodes for high-pressure discharge lamps
- H01J61/0735—Main electrodes for high-pressure discharge lamps characterised by the material of the electrode
- H01J61/0737—Main electrodes for high-pressure discharge lamps characterised by the material of the electrode characterised by the electron emissive material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/04—Electrodes; Screens; Shields
- H01J61/06—Main electrodes
- H01J61/073—Main electrodes for high-pressure discharge lamps
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/02—Manufacture of electrodes or electrode systems
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Discharge Lamp (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
811,016. Discharge lamps; electrode materials. CLAUDE PAZ ET VISSEAUX [formerly POUR LES APPLICATIONS DE L'ELECTRICITE ET DES GAZ RARESETABLISSEMENTS CLAUDE-PAZ & SILVA S. A.]. Jan. 20, 1956 [Jan. 22, 1955], No. 2003/56. Class 39(1). An electrode in a discharge lamp having an operating pressure higher than 0À5 kg. cm-2 and formed as described in Specification 799,434 includes a tungster rod 2 devoid of electron-emissive material and a starting member 10 of refractory metal having capillary interstices 5 for electron emissive material and one or both ends 8, 9 opening directly in the discharge space, the member 10 being formed by winding in the form of a spiral a strip 1, or a plurality of strips, of one or more refractory metals such as tungsten, tantalum or molybdenum, the emissive material being disposed in the interstices 5 between the turns of the winding and on portions, preferably not the outer peripheral surface, of the external surface of the member 10. The substance producing the emissive material is deposited on the ends 6 and/or 9 of the member 10 and seeps into the interstices 5 and can comprise a suspension in butyl acetate of calcium carbonate, calcium oxide or thorium oxide. The suspension may contain powdered tungsten or silica and a nitrocellulose binder. Preferably no substance is provided over at least two turns of the winding nearest the rod 2. The distance D should be such that the voltage drop under normal operating conditions is higher than 3À5 volts. The current density in the rod 2 should exceed 6 amps per sq. mm. Protrusions may be formed on the strip or strips, preferably not on the first one or two turns of the winding nearest rod 2. In the construction shown in Fig. 3 the strip 1 includes a central portion between the points 11 and 12 of larger width than the end portions 3 and 6 and the applied substance is restricted to the central portion. In the construction shown in Fig. 4 a tungsten wire 7 is tightly wound and with turns touching on the rod 2. The electrodes 10 are processed by heating the lamp to a temperature higher than 900‹C. (1100‹C. when calcium carbonate is used), while pumping the gases out of the lamp and/or flowing an inert gas therethrough as described in Specification 799,434. The discharge atmosphere may be krypton or xenon at a pressure higher than 0À5 kg. per cm<SP>2</SP>. during operation. The presence of mercury vapour is referred to. The envolope is of vitreous material having a very high silica content.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2855264X | 1954-09-22 | ||
| FR811016X | 1955-01-22 | ||
| FR2879427X | 1955-12-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB811016A true GB811016A (en) | 1959-03-25 |
Family
ID=32329518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2003/56A Expired GB811016A (en) | 1954-09-22 | 1956-01-20 | Activated electrode for electric discharge lamp |
Country Status (4)
| Country | Link |
|---|---|
| US (2) | US2855264A (en) |
| BE (1) | BE541432A (en) |
| DE (1) | DE1047313B (en) |
| GB (1) | GB811016A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1132241B (en) * | 1960-02-11 | 1962-06-28 | Philips Nv | Electric gas discharge lamp with cold cathode |
| NL269416A (en) * | 1960-09-21 | |||
| US5357167A (en) * | 1992-07-08 | 1994-10-18 | General Electric Company | High pressure discharge lamp with a thermally improved anode |
| US8087966B2 (en) * | 2004-04-21 | 2012-01-03 | Koninklijke Philips Electronics N.V. | Method for the thermal treatment of tungsten electrodes free from thorium oxide for high-pressure discharge lamps |
| US7633216B2 (en) * | 2005-11-28 | 2009-12-15 | General Electric Company | Barium-free electrode materials for electric lamps and methods of manufacture thereof |
| US8188663B2 (en) * | 2009-01-05 | 2012-05-29 | General Electric Company | High intensity discharge lamp |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2007926A (en) * | 1930-10-21 | 1935-07-09 | Sirian Lamp Co | Light emitting unit |
| US2006081A (en) * | 1934-03-02 | 1935-06-25 | Hanovia Chemical & Mfg Co | Electrode for vapor electric devices |
| US2057908A (en) * | 1935-01-08 | 1936-10-20 | Flexlume Corp | Luminous tube |
| CH197418A (en) * | 1936-08-03 | 1938-04-30 | Quarzlampen Gmbh | Electric high-pressure metal vapor discharge tube with an oxide electrode heated by the discharge. |
| US2249672A (en) * | 1936-12-10 | 1941-07-15 | Gen Electric | Discharge device |
| GB486138A (en) * | 1937-01-19 | 1938-05-31 | Gen Electric Co Ltd | Improvements in electrodes for high-pressure metal vapour electric discharge devices |
| DE697428C (en) * | 1937-02-05 | 1940-10-14 | Patra Patent Treuhand | Electric mercury vapor discharge lamp with an operating pressure of more than 5 atmospheres with discharge-heated operating glow electrodes and starting electrodes |
| BE426649A (en) * | 1937-03-09 | |||
| US2187774A (en) * | 1937-10-08 | 1940-01-23 | Gen Electric | Electric discharge lamp adapted for use as source in optical projection apparatus |
| US2304412A (en) * | 1939-10-04 | 1942-12-08 | Gen Electric | Electric high pressure discharge lamp |
| DE880360C (en) * | 1943-07-14 | 1953-06-22 | Patra Patent Treuhand | Electric spherical high pressure discharge lamp |
| GB639536A (en) * | 1946-04-17 | 1950-06-28 | Gen Electric Co Ltd | Improvements in and relating to mercury vapour lamps |
| US2670451A (en) * | 1950-01-12 | 1954-02-23 | Westinghouse Electric Corp | Short arc high-pressure vapor discharge lamp |
| US2682007A (en) * | 1951-01-11 | 1954-06-22 | Hanovia Chemical & Mfg Co | Compact type electrical discharge device |
| US2687489A (en) * | 1952-06-26 | 1954-08-24 | Hanovia Chemical & Mfg Co | Electrode |
| FR1084263A (en) * | 1953-06-04 | 1955-01-18 | Ets Claude Paz & Silva | Process for manufacturing an electrode for an electric discharge device |
-
0
- BE BE541432D patent/BE541432A/xx unknown
-
1955
- 1955-09-20 US US535331A patent/US2855264A/en not_active Expired - Lifetime
-
1956
- 1956-01-09 DE DEE11797A patent/DE1047313B/en active Pending
- 1956-01-16 US US559424A patent/US2879427A/en not_active Expired - Lifetime
- 1956-01-20 GB GB2003/56A patent/GB811016A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2879427A (en) | 1959-03-24 |
| US2855264A (en) | 1958-10-07 |
| DE1047313B (en) | 1958-12-24 |
| BE541432A (en) |
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