NL67449C - - Google Patents
Info
- Publication number
- NL67449C NL67449C NL67449DA NL67449C NL 67449 C NL67449 C NL 67449C NL 67449D A NL67449D A NL 67449DA NL 67449 C NL67449 C NL 67449C
- Authority
- NL
- Netherlands
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
- H01J1/135—Circuit arrangements therefor, e.g. for temperature control
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/52—Circuit arrangements for protecting such amplifiers
- H03F1/54—Circuit arrangements for protecting such amplifiers with tubes only
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/52—Circuit arrangements for protecting such amplifiers
- H03F1/54—Circuit arrangements for protecting such amplifiers with tubes only
- H03F1/544—Protection of filaments
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/40—Monitoring; Testing of relay systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/44—Arrangements for feeding power to a repeater along the transmission line
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/40—Applications of speech amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Amplifiers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US788380A US2488948A (en) | 1947-11-28 | 1947-11-28 | Repeatered transmission system, including multifilament amplifiers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL67449C true NL67449C (en:Method) | 1900-01-01 |
Family
ID=25144314
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL696909930A NL142201B (nl) | 1947-11-28 | Werkwijze voor het kleuren van een anodisch geoxydeerd aluminium werkstuk, alsmede aldus gekleurd, anodisch geoxydeerd werkstuk. | |
| NL67449D NL67449C (en:Method) | 1947-11-28 |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL696909930A NL142201B (nl) | 1947-11-28 | Werkwijze voor het kleuren van een anodisch geoxydeerd aluminium werkstuk, alsmede aldus gekleurd, anodisch geoxydeerd werkstuk. |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2488948A (en:Method) |
| FR (1) | FR968922A (en:Method) |
| NL (2) | NL67449C (en:Method) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2843803A (en) * | 1956-03-29 | 1958-07-15 | Rca Corp | Vacuum tube input circuit |
| US2936385A (en) * | 1958-04-25 | 1960-05-10 | Western Electric Co | Heater insulator for indirectly heated cathode |
| US3105125A (en) * | 1959-10-30 | 1963-09-24 | Bell Telephone Labor Inc | Power separation filter |
| US3119931A (en) * | 1960-06-28 | 1964-01-28 | Philips Corp | Circuit means for coupling an x-ray device to a control supply apparatus |
| NL275209A (en:Method) * | 1961-02-24 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB190812398A (en) * | 1908-06-09 | 1909-06-03 | William Dierman | Improvements in or relating to Installations of Electric Lamps having Metal Filaments |
| NL7572C (en:Method) * | 1919-09-03 | |||
| US1833968A (en) * | 1925-11-19 | 1931-12-01 | American Telephone & Telegraph | Amplifying system |
| US1699011A (en) * | 1925-12-07 | 1929-01-15 | Murphy Edmund Guyer | Vacuum tube |
| BE366789A (en:Method) * | 1927-11-10 | |||
| US1940181A (en) * | 1928-09-18 | 1933-12-19 | American Telephone & Telegraph | Vacuum tube circuits |
| US2020875A (en) * | 1931-12-31 | 1935-11-12 | Bell Telephone Labor Inc | Energization and control of amplifiers |
| US2020318A (en) * | 1934-03-06 | 1935-11-12 | Bell Telephone Labor Inc | System including repeater |
-
0
- NL NL696909930A patent/NL142201B/xx unknown
- NL NL67449D patent/NL67449C/xx active
-
1947
- 1947-11-28 US US788380A patent/US2488948A/en not_active Expired - Lifetime
-
1948
- 1948-07-08 FR FR968922D patent/FR968922A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL142201B (nl) | |
| FR968922A (fr) | 1950-12-08 |
| US2488948A (en) | 1949-11-22 |