GB560057A - Improvements in and relating to electric discharge devices and electrodes therefor - Google Patents
Improvements in and relating to electric discharge devices and electrodes thereforInfo
- Publication number
- GB560057A GB560057A GB13146/42A GB1314642A GB560057A GB 560057 A GB560057 A GB 560057A GB 13146/42 A GB13146/42 A GB 13146/42A GB 1314642 A GB1314642 A GB 1314642A GB 560057 A GB560057 A GB 560057A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrode
- coil
- emissive
- electric discharge
- convolutions
- 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
- H01J61/0672—Main electrodes for low-pressure discharge lamps characterised by the construction of the electrode
-
- 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
Landscapes
- Discharge Lamp (AREA)
Abstract
560,057. Discharge lamps. BRITISH THOMSON-HOUSTON CO., Ltd. Sept. 17, 1942, No. 13146. Convention date, Sept. 17, 1941. [Class 39 (i)] A cathode for an electric discharge tube or lamp consists of an open work grid surrounding a space and having emissive material deposited on the inner side only of the electrode and the cathode is heated by passing current therethrough until the emissive temperature is reached and the resistance of the electrode is chosen such that the voltage required for this is sufficient to ionise the atmosphere in the tube. The electrode 21 may be a simple helical coil or a compound helical coil as shown. A plate 25 may be attached to one arm of the electrode to act as a shield to collect sputtered activated material. In order to apply the emissive material the coil is compressed axially until its convolutions go solid and a mixture of emissive material and liquid is applied to the interior of the coil. When the liquid has evaporated away leaving the material on the coil the convolutions are then permitted to spring apart.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US411209A US2329126A (en) | 1941-09-17 | 1941-09-17 | Electric discharge device and electrode therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB560057A true GB560057A (en) | 1944-03-17 |
Family
ID=23628028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13146/42A Expired GB560057A (en) | 1941-09-17 | 1942-09-17 | Improvements in and relating to electric discharge devices and electrodes therefor |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2329126A (en) |
| GB (1) | GB560057A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2441863A (en) * | 1945-03-10 | 1948-05-18 | Gen Electric | Electrode for discharge devices |
| US2459567A (en) * | 1946-12-21 | 1949-01-18 | Gen Electric | Positive column lamp |
| US2505993A (en) * | 1948-01-20 | 1950-05-02 | Rogers Louis | Fluorescent electric lamp |
| US2560953A (en) * | 1949-06-30 | 1951-07-17 | Sylvania Electric Prod | Electric gaseous discharge device electrode |
| US4499401A (en) * | 1983-03-03 | 1985-02-12 | General Electric Company | Triple coil incandescent filament |
-
1941
- 1941-09-17 US US411209A patent/US2329126A/en not_active Expired - Lifetime
-
1942
- 1942-09-17 GB GB13146/42A patent/GB560057A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2329126A (en) | 1943-09-07 |
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