GB479190A - Improvements in electric discharge tubes - Google Patents
Improvements in electric discharge tubesInfo
- Publication number
- GB479190A GB479190A GB27502/37A GB2750237A GB479190A GB 479190 A GB479190 A GB 479190A GB 27502/37 A GB27502/37 A GB 27502/37A GB 2750237 A GB2750237 A GB 2750237A GB 479190 A GB479190 A GB 479190A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electric discharge
- tube
- oct
- active material
- vaporized
- 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
- 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
- H01J9/12—Manufacture of electrodes or electrode systems of photo-emissive cathodes; of secondary-emission electrodes
- H01J9/125—Manufacture of electrodes or electrode systems of photo-emissive cathodes; of secondary-emission electrodes of secondary emission electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2201/00—Electrodes common to discharge tubes
- H01J2201/32—Secondary emission electrodes
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Discharge Lamp (AREA)
Abstract
479,190. Electrode materials. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. Oct. 9, 1937, No. 27502. Convention date, Oct. 12, 1936. [Class 39 (i)] An electric discharge tube contains one or more secondary-electron-emitting electrodes which have been prepared outside the tube by causing the vapour of an active material to deposit on a core body. Deposition of vaporized material on undesired parts of the tube is thus avoided, and the electrodes so prepared are stable in air. The active material may be an alkali or alkaline earth metal, such as barium vaporized in an evacuated vessel on nickel plates which are heated and maintained at a suitable potential during the process.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE479190X | 1936-10-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB479190A true GB479190A (en) | 1938-02-01 |
Family
ID=6542370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB27502/37A Expired GB479190A (en) | 1936-10-12 | 1937-10-09 | Improvements in electric discharge tubes |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR827738A (en) |
| GB (1) | GB479190A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE857535C (en) * | 1939-08-08 | 1952-12-01 | Telefunken Gmbh | Impact electrode for secondary electron multiplication |
| DE895629C (en) * | 1940-07-31 | 1953-11-05 | Zeiss Ikon Ag | Process for the manufacture of secondary emission cathodes |
-
1937
- 1937-10-09 GB GB27502/37A patent/GB479190A/en not_active Expired
- 1937-10-11 FR FR827738D patent/FR827738A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE857535C (en) * | 1939-08-08 | 1952-12-01 | Telefunken Gmbh | Impact electrode for secondary electron multiplication |
| DE895629C (en) * | 1940-07-31 | 1953-11-05 | Zeiss Ikon Ag | Process for the manufacture of secondary emission cathodes |
Also Published As
| Publication number | Publication date |
|---|---|
| FR827738A (en) | 1938-05-03 |
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