GB684717A - Improvements in electric discharge lamps - Google Patents
Improvements in electric discharge lampsInfo
- Publication number
- GB684717A GB684717A GB23712/50A GB2371250A GB684717A GB 684717 A GB684717 A GB 684717A GB 23712/50 A GB23712/50 A GB 23712/50A GB 2371250 A GB2371250 A GB 2371250A GB 684717 A GB684717 A GB 684717A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oxide
- electric discharge
- sept
- coating
- discharge lamps
- 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
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 abstract 4
- 239000011248 coating agent Substances 0.000 abstract 2
- 238000000576 coating method Methods 0.000 abstract 2
- IATRAKWUXMZMIY-UHFFFAOYSA-N strontium oxide Chemical compound [O-2].[Sr+2] IATRAKWUXMZMIY-UHFFFAOYSA-N 0.000 abstract 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract 1
- 239000011575 calcium Substances 0.000 abstract 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 abstract 1
- 239000010406 cathode material Substances 0.000 abstract 1
- 239000000463 material 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
- H01J61/02—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
Abstract
684,717. Cathode materials. SYLVANIA ELECTRIC PRODUCTS. Inc. Sept. 27, 1950 [Sept. 28, 1949], No. 23712/50. Class 39(i) An electric discharge lamp includes a sealed tubular envelope, a low pressure gas filling, and two spaced cathodes, at least one of which is provided with a coating of an electroemissive material comprising haprium oxide with barium oxide, in molal ratio between 0.2 to 5.5 and 2.0 to 5.5, and preferably in the ratio 1 to 5.5. in order to prevent discolouration and to prolong the life of the lamp. In addition to barium oxide, the coating may include calcium and strontium oxide. Specification 647,954 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US118252A US2663816A (en) | 1949-09-28 | 1949-09-28 | Electric discharge lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB684717A true GB684717A (en) | 1952-12-24 |
Family
ID=22377450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB23712/50A Expired GB684717A (en) | 1949-09-28 | 1950-09-27 | Improvements in electric discharge lamps |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2663816A (en) |
| GB (1) | GB684717A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2347774A1 (en) * | 1976-04-09 | 1977-11-04 | Gte Sylvania Inc | IMPROVEMENTS FOR HIGH PRESSURE MERCURY VAPOR DISCHARGE LAMPS |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL91686C (en) * | 1951-11-01 | |||
| US3056904A (en) * | 1958-10-20 | 1962-10-02 | Minnesota Mining & Mfg | Thermoprinting apparatus and method |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1823984A (en) * | 1926-05-13 | 1931-09-22 | Communications Patents Inc | Cathode for thermionic devices |
| NL24414C (en) * | 1926-06-09 | |||
| BE359097A (en) * | 1928-04-13 | |||
| US2142331A (en) * | 1935-03-09 | 1939-01-03 | Bell Telephone Labor Inc | Electron emitting cathode |
| US2233741A (en) * | 1938-11-21 | 1941-03-04 | Kurt F J Kirsten | Cathode electrode |
| US2310983A (en) * | 1940-02-20 | 1943-02-16 | Samuel C Miller | Electrode for luminous tubes and method of producing the same |
| NL76841C (en) * | 1940-11-23 | |||
| US2457515A (en) * | 1941-11-13 | 1948-12-28 | Bell Telephone Labor Inc | Insulating coating compositions and method of making |
| US2346553A (en) * | 1942-02-28 | 1944-04-11 | Bell Telephone Labor Inc | Coating suspension and method of preparation |
| US2477279A (en) * | 1946-09-11 | 1949-07-26 | Hanovia Chemical & Mfg Co | Electrical discharge device |
-
1949
- 1949-09-28 US US118252A patent/US2663816A/en not_active Expired - Lifetime
-
1950
- 1950-09-27 GB GB23712/50A patent/GB684717A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2347774A1 (en) * | 1976-04-09 | 1977-11-04 | Gte Sylvania Inc | IMPROVEMENTS FOR HIGH PRESSURE MERCURY VAPOR DISCHARGE LAMPS |
Also Published As
| Publication number | Publication date |
|---|---|
| US2663816A (en) | 1953-12-22 |
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