GB526731A - Improvements in secondary emissive electrodes - Google Patents
Improvements in secondary emissive electrodesInfo
- Publication number
- GB526731A GB526731A GB9469/39A GB946939A GB526731A GB 526731 A GB526731 A GB 526731A GB 9469/39 A GB9469/39 A GB 9469/39A GB 946939 A GB946939 A GB 946939A GB 526731 A GB526731 A GB 526731A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnesium
- electrode
- per cent
- march
- secondary emissive
- 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
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract 3
- 229910052749 magnesium Inorganic materials 0.000 abstract 3
- 239000011777 magnesium Substances 0.000 abstract 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 1
- 229910000861 Mg alloy Inorganic materials 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 239000000956 alloy Substances 0.000 abstract 1
- 229910052802 copper Inorganic materials 0.000 abstract 1
- 239000010949 copper Substances 0.000 abstract 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 abstract 1
- 239000010931 gold Substances 0.000 abstract 1
- 229910052737 gold Inorganic materials 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 150000002739 metals Chemical class 0.000 abstract 1
- 229910052709 silver Inorganic materials 0.000 abstract 1
- 239000004332 silver Substances 0.000 abstract 1
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
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/32—Secondary-electron-emitting 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)
- Cold Cathode And The Manufacture (AREA)
- Photovoltaic Devices (AREA)
Abstract
526,731. Alloys. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. March 27, 1939, No. 9469. Convention date, March 25, 1938. Drawings to Specification. [Class 82 (i)] A secondary electron emissive electrode is formed of, or rendered emissive by the application of, an alloy of magnesium with one or more other metals, for example gold with up to 30 per cent. of magnesium, or copper with up to 16 per cent. of magnesium, or silver with up to 20 per cent. of magnesium. An electron multiplier in which the electrode is used may be of the type described in Specification 499,665, [Group XL], and in making it, the envelope including the electrode may be heated at about 450C. and evacuated.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US197994A US2233276A (en) | 1938-03-25 | 1938-03-25 | Secondary electron emissive electrode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB526731A true GB526731A (en) | 1940-09-24 |
Family
ID=22731572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9469/39A Expired GB526731A (en) | 1938-03-25 | 1939-03-27 | Improvements in secondary emissive electrodes |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2233276A (en) |
| BE (1) | BE433432A (en) |
| FR (1) | FR851749A (en) |
| GB (1) | GB526731A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE519545A (en) * | 1952-05-01 | |||
| US3072816A (en) * | 1959-08-05 | 1963-01-08 | Landis & Gry A G | Electrode device and method of producing the same |
| US3756682A (en) * | 1967-02-13 | 1973-09-04 | Schlumberger Technology Corp | Method for outgassing permanent magnets |
-
0
- BE BE433432D patent/BE433432A/xx unknown
-
1938
- 1938-03-25 US US197994A patent/US2233276A/en not_active Expired - Lifetime
-
1939
- 1939-03-17 FR FR851749D patent/FR851749A/en not_active Expired
- 1939-03-27 GB GB9469/39A patent/GB526731A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2233276A (en) | 1941-02-25 |
| BE433432A (en) | |
| FR851749A (en) | 1940-01-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB364706A (en) | Improvements in and relating to x-ray apparatus | |
| GB568962A (en) | Improvements in or relating to cathodes for electron discharge devices | |
| GB528818A (en) | Improvements in or relating to electron multipliers | |
| GB526731A (en) | Improvements in secondary emissive electrodes | |
| GB538479A (en) | Cathodes for electron discharge devices and alloys therefor | |
| GB513111A (en) | Improvements in or relating to electron discharge devices | |
| GB491287A (en) | Improvements in secondary electron emitting electrodes suitable for electron discharge devices | |
| GB534154A (en) | Improvements in or relating to cathodes for electron discharge devices | |
| GB498843A (en) | Improvements in or relating to electron multiplier discharge devices | |
| GB216840A (en) | ||
| GB459539A (en) | Improvements in cathodes for thermionic tubes | |
| GB513879A (en) | Improvements in or relating to electron multipliers | |
| GB397132A (en) | Improvements in oxide coated thermionic cathodes | |
| GB559591A (en) | Improvements relating to secondary electron emissive electrodes | |
| GB529074A (en) | Improvements in and relating to electric discharge devices | |
| GB515525A (en) | Improvements in or relating to electron multipliers | |
| GB436712A (en) | Improvements in or relating to indirectly heated cathode structures and electron discharge devices incorporating the same | |
| GB432484A (en) | Improvements relating to electrodes for sparking plugs and other electrical contacts | |
| GB522615A (en) | Improvements in or relating to the manufacture and production of soldering irons | |
| GB493487A (en) | Improvements relating to thermionic valves | |
| GB549778A (en) | Improvements in or relating to electron discharge devices | |
| GB587931A (en) | Improvements in or relating to electrodes for electron discharge devices and alloys for use therein | |
| GB642364A (en) | Improvements in or relating to indirectly heated cathodes | |
| GB248956A (en) | Improvements in or relating to cathodes for electric discharge devices | |
| GB318190A (en) | Improvements in spark plug electrode |