ES340339A1 - Radio-interference-free low-pressure mercury-vapor lamp - Google Patents
Radio-interference-free low-pressure mercury-vapor lampInfo
- Publication number
- ES340339A1 ES340339A1 ES340339A ES340339A ES340339A1 ES 340339 A1 ES340339 A1 ES 340339A1 ES 340339 A ES340339 A ES 340339A ES 340339 A ES340339 A ES 340339A ES 340339 A1 ES340339 A1 ES 340339A1
- Authority
- ES
- Spain
- Prior art keywords
- mixture
- boride
- pressure mercury
- alkaline earth
- grain size
- 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
- H01J61/02—Details
- H01J61/04—Electrodes; Screens; Shields
- H01J61/06—Main electrodes
- H01J61/067—Main electrodes for low-pressure discharge lamps
- H01J61/0675—Main electrodes for low-pressure discharge lamps characterised by the material of the electrode
- H01J61/0677—Main electrodes for low-pressure discharge lamps characterised by the material of the electrode characterised by the electron emissive material
Landscapes
- Discharge Lamp (AREA)
- Solid Thermionic Cathode (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
- Luminescent Compositions (AREA)
Abstract
A low-pressure mercury vapour lamp stated to give rise to reduced interference radiation, includes two thermionic electrodes, each of which consists of a support coated with a mixture which includes an electron emission material consisting of at least one alkaline earth metal oxide and a boride of a metal of the lanthanide or actinide series or of the second, fourth, fifth or seventh groups of the Periodic Table, the quantity of boride lying in the range 0À1 to 15%-and preferably in the range of 0À1 to 7%-by weight of the alkaline earth metal oxide. The borides of Ca, La, Ce, Pr, Sm, U, Zr, V, Ta and Mn are specifically referred to, the grain size of the boride particles being not greater than 30, and preferably less than 15, the mean grain size of the electron emissive particles. The mixture may additionally include zirconium in amount 1 to 5% by weight of the electronic emissive material. A mixture of the boride, zirconium and an 8 : 5 : 7 mixture of barium, calcium and strontium carbonates may be coated on a tungsten wire support which is subsequently heated to decompose the carbonates to oxides. Examples of compositions are given.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL6606479A NL6606479A (en) | 1966-05-12 | 1966-05-12 | |
| NL6614550A NL6614550A (en) | 1966-10-15 | 1966-10-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES340339A1 true ES340339A1 (en) | 1968-06-01 |
Family
ID=26644037
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES340339A Expired ES340339A1 (en) | 1966-05-12 | 1967-05-10 | Radio-interference-free low-pressure mercury-vapor lamp |
| ES340338A Expired ES340338A1 (en) | 1966-05-12 | 1967-05-10 | Radio-interference-free low-pressure mercury-vapor lamp |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES340338A Expired ES340338A1 (en) | 1966-05-12 | 1967-05-10 | Radio-interference-free low-pressure mercury-vapor lamp |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US3505553A (en) |
| AT (1) | AT279735B (en) |
| BE (2) | BE698366A (en) |
| CH (2) | CH490732A (en) |
| DE (2) | DE1589248B2 (en) |
| ES (2) | ES340339A1 (en) |
| FR (2) | FR1522815A (en) |
| GB (2) | GB1191463A (en) |
| NO (1) | NO118120B (en) |
| SE (2) | SE304558B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4321503A (en) * | 1978-11-06 | 1982-03-23 | Westinghouse Electric Corp. | HID Lamp electrode comprising barium-calcium niobate or tantalate |
| JPS63141252A (en) * | 1986-12-02 | 1988-06-13 | Hitachi Ltd | Low pressure discharge lamp |
| DE3715375C1 (en) * | 1987-05-08 | 1988-10-13 | Heraeus Gmbh W C | Hydrogen discharge lamp |
| US4910431A (en) * | 1987-04-24 | 1990-03-20 | W. C. Heraeus Gmbh | Hydrogen discharge ultraviolet light source or lamp, and method of its manufacture |
| DE3713704A1 (en) * | 1987-04-24 | 1988-11-03 | Heraeus Gmbh W C | HYDROGEN DISCHARGE LAMP AND METHOD FOR THE PRODUCTION THEREOF |
| US5391523A (en) * | 1993-10-27 | 1995-02-21 | Marlor; Richard C. | Electric lamp with lead free glass |
| US5675214A (en) * | 1994-09-21 | 1997-10-07 | U.S. Philips Corporation | Low-pressure discharge lamp having hollow electrodes |
| DE69507283T2 (en) * | 1994-11-08 | 1999-07-01 | Koninklijke Philips Electronics N.V., Eindhoven | LOW PRESSURE DISCHARGE LAMP |
| US5686789A (en) | 1995-03-14 | 1997-11-11 | Osram Sylvania Inc. | Discharge device having cathode with micro hollow array |
| JPH103879A (en) * | 1996-06-12 | 1998-01-06 | Tdk Corp | Ceramic cathode fluorescent lamp |
| US5856726A (en) * | 1996-03-15 | 1999-01-05 | Osram Sylvania Inc. | Electric lamp with a threaded electrode |
| US6713950B2 (en) * | 2001-08-22 | 2004-03-30 | General Electric Company | Low volatility slurry for emission mix powder |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE502232A (en) * | 1950-03-31 | |||
| US2878411A (en) * | 1955-03-21 | 1959-03-17 | Chromatic Television Lab Inc | Color television display screen |
| US2959702A (en) * | 1958-07-02 | 1960-11-08 | Westinghouse Electric Corp | Lamp and mount |
| US3027480A (en) * | 1958-12-15 | 1962-03-27 | Raytheon Co | Electron discharge device cathodes |
| GB1015840A (en) * | 1964-09-08 | 1966-01-05 | Standard Telephones Cables Ltd | Thermionic valves |
| GB1178052A (en) * | 1966-04-20 | 1970-01-14 | Matsushita Electronics Corp | A Noiseless Discharge Tube |
| GB1178051A (en) * | 1966-04-20 | 1970-01-14 | Matsushita Electronics Corp | Noiseless Discharge Tube |
-
1967
- 1967-04-27 US US634222A patent/US3505553A/en not_active Expired - Lifetime
- 1967-05-09 DE DE1967N0030479 patent/DE1589248B2/en active Granted
- 1967-05-09 DE DE1967N0030478 patent/DE1589247B2/en active Granted
- 1967-05-09 NO NO168066A patent/NO118120B/no unknown
- 1967-05-09 CH CH660367A patent/CH490732A/en not_active IP Right Cessation
- 1967-05-09 SE SE6489/67A patent/SE304558B/xx unknown
- 1967-05-09 AT AT432567A patent/AT279735B/en not_active IP Right Cessation
- 1967-05-09 CH CH660267A patent/CH464354A/en unknown
- 1967-05-09 SE SE6482/67A patent/SE305031B/xx unknown
- 1967-05-09 GB GB21428/67A patent/GB1191463A/en not_active Expired
- 1967-05-09 GB GB21427/67A patent/GB1193864A/en not_active Expired
- 1967-05-10 ES ES340339A patent/ES340339A1/en not_active Expired
- 1967-05-10 ES ES340338A patent/ES340338A1/en not_active Expired
- 1967-05-11 BE BE698366D patent/BE698366A/xx unknown
- 1967-05-12 BE BE698451D patent/BE698451A/xx unknown
- 1967-05-12 FR FR106223A patent/FR1522815A/en not_active Expired
- 1967-05-12 FR FR106222A patent/FR1522814A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NO118120B (en) | 1969-11-10 |
| AT279735B (en) | 1970-03-10 |
| FR1522815A (en) | 1968-04-26 |
| US3505553A (en) | 1970-04-07 |
| GB1193864A (en) | 1970-06-03 |
| DE1589247B2 (en) | 1976-04-15 |
| DE1589247A1 (en) | 1970-04-09 |
| ES340338A1 (en) | 1968-06-01 |
| CH464354A (en) | 1968-10-31 |
| GB1191463A (en) | 1970-05-13 |
| SE305031B (en) | 1968-10-14 |
| BE698451A (en) | 1967-11-13 |
| FR1522814A (en) | 1968-04-26 |
| CH490732A (en) | 1970-05-15 |
| DE1589248A1 (en) | 1970-04-30 |
| SE304558B (en) | 1968-09-30 |
| BE698366A (en) | 1967-11-13 |
| DE1589248B2 (en) | 1976-04-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| ES340339A1 (en) | Radio-interference-free low-pressure mercury-vapor lamp | |
| GB734311A (en) | Improvements in or relating to cathodes for use in electric discharge tubes, tubes comprising such cathodes and methods of manufacturing such cathodes | |
| CA940999A (en) | Discharge lamp thermionic cathode containing emission material | |
| GB782287A (en) | Improvements in or relating to electron emissive coatings | |
| GB504120A (en) | Improvements in electrodes for high-pressure mercury-vapour discharge devices | |
| US2374677A (en) | Glow discharge lamp | |
| GB666053A (en) | Improvements in or relating to thermionic cathodes | |
| GB1131991A (en) | Fluorescent phosphor activated by divalent europium | |
| US3461335A (en) | Glow-discharge tubes containing a radio-active primer | |
| JPH0438111B2 (en) | ||
| US3213312A (en) | Ultraviolet detector tube with a gas filling of hydrogen, helium and a noble gas | |
| JPS5796453A (en) | Sintered electrode for discharge lamp | |
| GB670582A (en) | Improvements in or relating to electron discharge devices employing secondary-electron-emission and electrodes for use therein | |
| GB1167157A (en) | Electric Discharge Tube. | |
| GB687617A (en) | Electrode for electric low pressure discharge tubes | |
| GB731421A (en) | Improvements in or relating to thermionic cathodes | |
| GB1178052A (en) | A Noiseless Discharge Tube | |
| GB1178051A (en) | Noiseless Discharge Tube | |
| GB714429A (en) | Improvements in or relating to thermionic cathodes | |
| GB729819A (en) | Improvements in or relating to emissive cathodes | |
| GB790899A (en) | Improvements in or relating to supply cathodes | |
| JPS5537704A (en) | Method for manufacturing sintered type electrode for discharge lamp | |
| GB1166945A (en) | Improvements relating to Low-Pressure Mercury Vapour Discharge Lamps | |
| GB1070377A (en) | Improvements in or relating to thermionic cathodes and to electron discharge devices employing thermionic cathodes | |
| GB1176121A (en) | Improvements in or relating to Grid Electrodes for Electron Tubes. |