GB316104A - Improvements relating to coated cathodes for electron discharge devices - Google Patents
Improvements relating to coated cathodes for electron discharge devicesInfo
- Publication number
- GB316104A GB316104A GB22507/29A GB2250729A GB316104A GB 316104 A GB316104 A GB 316104A GB 22507/29 A GB22507/29 A GB 22507/29A GB 2250729 A GB2250729 A GB 2250729A GB 316104 A GB316104 A GB 316104A
- Authority
- GB
- United Kingdom
- Prior art keywords
- carbonates
- solvents
- cathodes
- binder
- coated
- 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
- 150000004649 carbonic acid derivatives Chemical class 0.000 abstract 4
- 239000002904 solvent Substances 0.000 abstract 3
- 239000011230 binding agent Substances 0.000 abstract 2
- 150000001875 compounds Chemical class 0.000 abstract 2
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 abstract 1
- 239000000020 Nitrocellulose Substances 0.000 abstract 1
- FJWGYAHXMCUOOM-QHOUIDNNSA-N [(2s,3r,4s,5r,6r)-2-[(2r,3r,4s,5r,6s)-4,5-dinitrooxy-2-(nitrooxymethyl)-6-[(2r,3r,4s,5r,6s)-4,5,6-trinitrooxy-2-(nitrooxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-3,5-dinitrooxy-6-(nitrooxymethyl)oxan-4-yl] nitrate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O)O[C@H]1[C@@H]([C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@@H](CO[N+]([O-])=O)O1)O[N+]([O-])=O)CO[N+](=O)[O-])[C@@H]1[C@@H](CO[N+]([O-])=O)O[C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O FJWGYAHXMCUOOM-QHOUIDNNSA-N 0.000 abstract 1
- 230000032683 aging Effects 0.000 abstract 1
- 150000001298 alcohols Chemical class 0.000 abstract 1
- 238000009835 boiling Methods 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 230000002939 deleterious effect Effects 0.000 abstract 1
- 230000006866 deterioration Effects 0.000 abstract 1
- WYACBZDAHNBPPB-UHFFFAOYSA-N diethyl oxalate Chemical compound CCOC(=O)C(=O)OCC WYACBZDAHNBPPB-UHFFFAOYSA-N 0.000 abstract 1
- 235000011194 food seasoning agent Nutrition 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 229920001220 nitrocellulos Polymers 0.000 abstract 1
- 238000002360 preparation method Methods 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
- H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes
- H01J9/042—Manufacture, activation of the emissive part
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
- B65H35/0006—Article or web delivery apparatus incorporating cutting or line-perforating devices
- B65H35/006—Article or web delivery apparatus incorporating cutting or line-perforating devices with means for delivering a predetermined length of tape
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Discharge Lamp (AREA)
- Solid Thermionic Cathode (AREA)
- Paints Or Removers (AREA)
Abstract
316,104. Westinghouse Lamp Co., (Assignees of Fredenburgh, M. N.). July 20, 1928, [Convention date]. Vacuum tubes.-In the manufacture of oxide coated cathodes in which a filament is coated with alkaline earth carbonates mixed with or protected by a binder, such as a solution of cellulose nitrate, deterioration on ageing is prevented by the use of pure carbonates, prepared as described in Specifications 315,324 and 315,801, together with solvents for the binder which are completely vaporizable in vacuo and do not react with the carbonates to produce compounds deleterious to emission, or if reactive with the carbonates, produce compounds which are totally dissociated by the heat employed in the seasoning of the cathodes. As solvents, diethyl carbonate and diethyl oxalate are employed, either alone or in mixture; proportions and directions are given for the preparation of the coating material. To the solvents mentioned, anhydrous alcohols of lower boiling points may be added. Specification 315,800 also is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US294326A US1842161A (en) | 1928-07-20 | 1928-07-20 | Electron emission material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB316104A true GB316104A (en) | 1930-09-25 |
Family
ID=23132929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB22507/29A Expired GB316104A (en) | 1928-07-20 | 1929-07-22 | Improvements relating to coated cathodes for electron discharge devices |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US1842161A (en) |
| BE (1) | BE362221A (en) |
| DE (1) | DE521050C (en) |
| FR (1) | FR678731A (en) |
| GB (1) | GB316104A (en) |
| NL (1) | NL28930C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE745742C (en) * | 1937-03-09 | 1944-03-31 | Elek Zitaets Ag | Process for the manufacture of oxide cathodes |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2600112A (en) * | 1948-06-30 | 1952-06-10 | Sylvania Electric Prod | Electron emitter |
| US2673387A (en) * | 1951-05-18 | 1954-03-30 | Gen Electric | Electron emission coating mixtures |
| US2985548A (en) * | 1957-12-26 | 1961-05-23 | Sylvania Electric Prod | Method of making a low density coating for an electron discharge device |
| US4411827A (en) * | 1981-03-18 | 1983-10-25 | Corneille David M | Coprecipitation process for thermionic cathode type materials |
| US4359489A (en) * | 1981-03-18 | 1982-11-16 | Corneille David M | Coprecipitation process for thermionic cathode type materials |
-
0
- BE BE362221D patent/BE362221A/xx unknown
- NL NL28930D patent/NL28930C/xx active
-
1928
- 1928-07-20 US US294326A patent/US1842161A/en not_active Expired - Lifetime
-
1929
- 1929-07-18 FR FR678731D patent/FR678731A/en not_active Expired
- 1929-07-19 DE DEW83232D patent/DE521050C/en not_active Expired
- 1929-07-22 GB GB22507/29A patent/GB316104A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE745742C (en) * | 1937-03-09 | 1944-03-31 | Elek Zitaets Ag | Process for the manufacture of oxide cathodes |
Also Published As
| Publication number | Publication date |
|---|---|
| US1842161A (en) | 1932-01-19 |
| BE362221A (en) | |
| NL28930C (en) | |
| DE521050C (en) | 1931-03-16 |
| FR678731A (en) | 1930-04-03 |
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