FR1553520A - - Google Patents
Info
- Publication number
- FR1553520A FR1553520A FR1553520DA FR1553520A FR 1553520 A FR1553520 A FR 1553520A FR 1553520D A FR1553520D A FR 1553520DA FR 1553520 A FR1553520 A FR 1553520A
- Authority
- FR
- France
- 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
- 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
- H01J1/24—Insulating layer or body located between heater and emissive material
-
- 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
- H01J1/26—Supports for the emissive material
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL676702376A NL153018B (en) | 1967-02-17 | 1967-02-17 | INDIRECTLY HEATED CATHODE. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR1553520A true FR1553520A (en) | 1969-01-10 |
Family
ID=19799315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR1553520D Expired FR1553520A (en) | 1967-02-17 | 1968-02-13 |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3553521A (en) |
| AT (1) | AT276576B (en) |
| BE (1) | BE710828A (en) |
| CH (1) | CH468713A (en) |
| ES (1) | ES350511A1 (en) |
| FR (1) | FR1553520A (en) |
| GB (1) | GB1150409A (en) |
| NL (1) | NL153018B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3883767A (en) * | 1974-02-08 | 1975-05-13 | Gte Sylvania Inc | Heater for fast warmup cathode |
| US3881126A (en) * | 1974-03-06 | 1975-04-29 | Gte Sylvania Inc | Fast warm-up cathode assembly |
| JPS6023454B2 (en) * | 1978-11-29 | 1985-06-07 | 株式会社日立製作所 | electron tube cathode |
| DE3029853C2 (en) * | 1980-08-07 | 1982-08-26 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Wehnelt cathode indirectly heated by electron impact |
| NL8304401A (en) * | 1983-12-22 | 1985-07-16 | Philips Nv | OXYD CATHODE. |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2733378A (en) * | 1956-01-31 | Thermionic cathodes for electronic discharge devices | ||
| US1719988A (en) * | 1923-01-26 | 1929-07-09 | Westinghouse Lamp Co | Electron device and the like adapted for alternating current |
| US2878410A (en) * | 1954-11-09 | 1959-03-17 | Gen Electric | Electronic tube structure |
| GB937391A (en) * | 1962-02-14 | 1963-09-18 | Mullard Ltd | Cold-cathode glow-discharge tubes |
| US3268305A (en) * | 1964-08-17 | 1966-08-23 | Sylvania Electric Prod | Composite wire |
| US3401297A (en) * | 1965-08-23 | 1968-09-10 | Varian Associates | Thermionic cathodes for electron discharge devices with improved refractory metal heater wires |
-
1967
- 1967-02-17 NL NL676702376A patent/NL153018B/en not_active IP Right Cessation
-
1968
- 1968-01-29 US US701204*A patent/US3553521A/en not_active Expired - Lifetime
- 1968-02-13 FR FR1553520D patent/FR1553520A/fr not_active Expired
- 1968-02-14 AT AT138568A patent/AT276576B/en active
- 1968-02-14 GB GB7263/68A patent/GB1150409A/en not_active Expired
- 1968-02-14 CH CH216568A patent/CH468713A/en unknown
- 1968-02-15 ES ES350511A patent/ES350511A1/en not_active Expired
- 1968-02-15 BE BE710828D patent/BE710828A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE1639341B2 (en) | 1976-02-12 |
| BE710828A (en) | 1968-08-16 |
| NL6702376A (en) | 1968-08-19 |
| AT276576B (en) | 1969-11-25 |
| US3553521A (en) | 1971-01-05 |
| ES350511A1 (en) | 1969-05-16 |
| DE1639341A1 (en) | 1971-04-08 |
| GB1150409A (en) | 1969-04-30 |
| CH468713A (en) | 1969-02-15 |
| NL153018B (en) | 1977-04-15 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |