GB376220A - Improvements in or relating to gaseous discharge devices - Google Patents
Improvements in or relating to gaseous discharge devicesInfo
- Publication number
- GB376220A GB376220A GB38992/30A GB3899230A GB376220A GB 376220 A GB376220 A GB 376220A GB 38992/30 A GB38992/30 A GB 38992/30A GB 3899230 A GB3899230 A GB 3899230A GB 376220 A GB376220 A GB 376220A
- Authority
- GB
- United Kingdom
- Prior art keywords
- thorium
- lamp
- electrode
- zirconium
- coating
- 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
Landscapes
- Discharge Lamp (AREA)
Abstract
376,220. Discharge apparatus. WESTINGHOUSE LAMP CO., Bloomfield, New Jersey, U.S. A.-(Assignees of Thomas, C. H.J.) Dec. 29, 1930, No. 38992. Convention date. Dec. 28, 1929. Void [Published under Sect. 91 of the Acts]. [Class 39 (i).] In a discharge device such as a lamp or X-ray tube, the positive ion bombardment is concentrated on a small surface of an electrode so as to heat it to a temperature of thermionic emission, and the electrode is made of a thermionic refractory metal such as thorium, uranium, zirconium or titanium. One or both electrodes of a lamp is hollow and formed by drilling a hole 7 in a block 3 of thorium. The exterior surface may be oxidized to form an insulating coating 8, or a coating of oxide of zirconium, aluminium or magnesium may be applied, so as to confine the discharge to the recess ; or an electrode of zirconium or titanium may have an external coating of thorium oxide. In another electrode, thorium is coated on or alloyed with the hollowed-out part of a tungsten or tantalum block. The lamp may be of the positive column type. The filling may be neon at a pressure of 10À3 mms. Dimensions of the electrodes and lamps are given.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US417091A US1932025A (en) | 1929-12-28 | 1929-12-28 | Electrode positive column lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB376220A true GB376220A (en) | 1932-07-07 |
Family
ID=23652540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB38992/30A Expired GB376220A (en) | 1929-12-28 | 1930-12-29 | Improvements in or relating to gaseous discharge devices |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1932025A (en) |
| FR (1) | FR708351A (en) |
| GB (1) | GB376220A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2449113A (en) * | 1944-07-22 | 1948-09-14 | Fruth Hal Frederick | Electric discharge device |
| US2716713A (en) * | 1950-03-22 | 1955-08-30 | Gen Electric | Cold electrode pulse lamp structure |
| BE502063A (en) * | 1950-03-22 | |||
| US3205388A (en) * | 1960-12-30 | 1965-09-07 | Lany Beatrice Pearson De | Drill hole type cathode with cooling means |
| US3614642A (en) * | 1966-09-14 | 1971-10-19 | Univ Maryland | Gas laser |
| WO1988000758A1 (en) * | 1986-07-11 | 1988-01-28 | Fox Leslie Z | A high-frequency fluorescent lamp |
| US5043627A (en) * | 1988-03-01 | 1991-08-27 | Fox Leslie Z | High-frequency fluorescent lamp |
| JPH04174951A (en) * | 1990-07-19 | 1992-06-23 | Tokyo Densoku Kk | Discharge tube |
-
1929
- 1929-12-28 US US417091A patent/US1932025A/en not_active Expired - Lifetime
-
1930
- 1930-12-24 FR FR708351D patent/FR708351A/en not_active Expired
- 1930-12-29 GB GB38992/30A patent/GB376220A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US1932025A (en) | 1933-10-24 |
| FR708351A (en) | 1931-07-23 |
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