GB739645A - Improvements in or relating to dispenser cathodes and methods of manufacturing such cathodes - Google Patents
Improvements in or relating to dispenser cathodes and methods of manufacturing such cathodesInfo
- Publication number
- GB739645A GB739645A GB5296/54A GB529654A GB739645A GB 739645 A GB739645 A GB 739645A GB 5296/54 A GB5296/54 A GB 5296/54A GB 529654 A GB529654 A GB 529654A GB 739645 A GB739645 A GB 739645A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- cathodes
- carbonate
- cavity
- dispenser
- 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
- 238000004519 manufacturing process Methods 0.000 title 1
- 238000000034 method Methods 0.000 title 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 abstract 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 abstract 2
- 238000005245 sintering Methods 0.000 abstract 2
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 abstract 1
- 239000010406 cathode material Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 229910052697 platinum Inorganic materials 0.000 abstract 1
- NEDFZELJKGZAQF-UHFFFAOYSA-J strontium;barium(2+);dicarbonate Chemical compound [Sr+2].[Ba+2].[O-]C([O-])=O.[O-]C([O-])=O NEDFZELJKGZAQF-UHFFFAOYSA-J 0.000 abstract 1
Classifications
-
- 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
- H01J1/13—Solid thermionic cathodes
- H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
- H01J1/28—Dispenser-type cathodes, e.g. L-cathode
-
- 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
- H01J9/047—Cathodes having impregnated bodies
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Solid Thermionic Cathode (AREA)
- Microwave Tubes (AREA)
Abstract
739,645. Cathode materials and processing. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Feb. 23, 1954 [Feb. 26, 1953], No. 5296/54. Drawings to Specification. Class 39 (1). In a dispenser cathode, the supply of emissive material contained in the internal cavity consists of a compact sintered mass of alkaline earth oxide, so prepared before closure of the cavity. This is formed by compressing the carbonate, such as barium-strontium carbonate, and then sintering. The sintering step may be carried out separately, in a platinum crucible in a vacuum oven for 5 minutes at 1500 C., or in place in the cathode body before finally closing the cavity, for 1 hour at 1000 C. and then 5 minutes at 1500 C. For the cylindrical type of cathode, the mass of carbonate may be preformed as a cylinder, or sectors thereof.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL319758X | 1953-02-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB739645A true GB739645A (en) | 1955-11-02 |
Family
ID=19783943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5296/54A Expired GB739645A (en) | 1953-02-26 | 1954-02-23 | Improvements in or relating to dispenser cathodes and methods of manufacturing such cathodes |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US2867742A (en) |
| BE (1) | BE526781A (en) |
| CH (1) | CH319758A (en) |
| DE (1) | DE1028697B (en) |
| FR (1) | FR1093864A (en) |
| GB (1) | GB739645A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2965793A (en) * | 1959-05-12 | 1960-12-20 | Westinghouse Electric Corp | Electron device |
| DE1253818B (en) * | 1963-05-08 | 1967-11-09 | Hitachi Ltd | Gas discharge tubes |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE674258C (en) * | 1934-01-27 | 1939-04-11 | Telefunken Gmbh | Indirectly heated glow cathode for cathode ray tubes and process for their production |
| DE669029C (en) * | 1934-06-29 | 1938-12-15 | Siemens Schuckertwerke Akt Ges | Self-heating cathode |
| GB445575A (en) * | 1934-10-12 | 1936-04-14 | Gen Electric Co Ltd | Improvements in or relating to electric discharge devices |
| US2175345A (en) * | 1935-07-12 | 1939-10-10 | Gen Electric | Electric gaseous discharge device |
| US2171238A (en) * | 1937-09-02 | 1939-08-29 | Westinghouse Electric & Mfg Co | Discharge device and electrode |
| US2492142A (en) * | 1945-10-17 | 1949-12-27 | Kenneth J Germeshausen | Electric system embodying coldcathode gaseous discharge device |
| NL69486C (en) * | 1947-11-26 | |||
| US2721372A (en) * | 1951-06-30 | 1955-10-25 | Philips Corp | Incandescible cathodes |
-
0
- BE BE526781D patent/BE526781A/xx unknown
-
1954
- 1954-02-18 US US411222A patent/US2867742A/en not_active Expired - Lifetime
- 1954-02-23 GB GB5296/54A patent/GB739645A/en not_active Expired
- 1954-02-24 CH CH319758D patent/CH319758A/en unknown
- 1954-02-24 FR FR1093864D patent/FR1093864A/en not_active Expired
- 1954-02-24 DE DEN8535A patent/DE1028697B/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR1093864A (en) | 1955-05-10 |
| CH319758A (en) | 1957-02-28 |
| DE1028697B (en) | 1958-04-24 |
| BE526781A (en) | |
| US2867742A (en) | 1959-01-06 |
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