IT500462A - - Google Patents
Info
- Publication number
- IT500462A IT500462A IT500462DA IT500462A IT 500462 A IT500462 A IT 500462A IT 500462D A IT500462D A IT 500462DA IT 500462 A IT500462 A IT 500462A
- Authority
- IT
- Italy
Links
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
- H01J1/14—Solid thermionic cathodes characterised by the material
- H01J1/142—Solid thermionic cathodes characterised by the material with alkaline-earth metal oxides, or such oxides used in conjunction with reducing agents, as an emissive material
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Discharge Lamp (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL314779X | 1952-03-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IT500462A true IT500462A (https=) |
Family
ID=19783766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT500462D IT500462A (https=) | 1952-03-24 |
Country Status (7)
| Country | Link |
|---|---|
| BE (1) | BE518639A (https=) |
| CH (1) | CH314779A (https=) |
| DE (1) | DE974888C (https=) |
| FR (1) | FR1073725A (https=) |
| GB (1) | GB725450A (https=) |
| IT (1) | IT500462A (https=) |
| NL (1) | NL168358C (https=) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE572700C (de) * | 1926-06-09 | 1933-03-22 | Friedrich Meyer Dr | Gluehkathode fuer Entladungsgefaesse |
| CH128076A (de) * | 1926-06-09 | 1928-10-01 | Philips Nv | Glühkathode für Entladungsgefässe. |
| NL24414C (https=) * | 1926-06-09 | |||
| NL23762C (https=) * | 1928-04-13 | |||
| DE597580C (de) * | 1928-05-01 | 1934-05-26 | Osram G M B H Komm Ges | Elektrische Leucht- oder Ultraviolett-Bestrahlungsroehre |
| GB311294A (en) * | 1928-05-08 | 1930-08-08 | Hans Joachim Spanner | Improvements in and relating to electric discharge devices |
| US2249672A (en) * | 1936-12-10 | 1941-07-15 | Gen Electric | Discharge device |
| BE482916A (https=) * | 1947-06-05 | |||
| GB650730A (en) * | 1947-07-16 | 1951-02-28 | British Thomson Houston Co Ltd | Improvements in and relating to electron emitting materials |
-
0
- NL NLAANVRAGE7014589,A patent/NL168358C/xx active
- BE BE518639D patent/BE518639A/xx unknown
- IT IT500462D patent/IT500462A/it unknown
-
1953
- 1953-03-20 GB GB7760/53A patent/GB725450A/en not_active Expired
- 1953-03-22 DE DEN6922A patent/DE974888C/de not_active Expired
- 1953-03-23 FR FR1073725D patent/FR1073725A/fr not_active Expired
- 1953-03-23 CH CH314779D patent/CH314779A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB725450A (en) | 1955-03-02 |
| FR1073725A (fr) | 1954-09-28 |
| DE974888C (de) | 1961-05-25 |
| BE518639A (https=) | |
| NL168358C (nl) | |
| CH314779A (de) | 1956-06-30 |