FR847831A - Telegraph repeater systems - Google Patents
Telegraph repeater systemsInfo
- Publication number
- FR847831A FR847831A FR847831DA FR847831A FR 847831 A FR847831 A FR 847831A FR 847831D A FR847831D A FR 847831DA FR 847831 A FR847831 A FR 847831A
- Authority
- FR
- France
- Prior art keywords
- repeater systems
- telegraph repeater
- telegraph
- systems
- repeater
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/20—Repeater circuits; Relay circuits
- H04L25/24—Relay circuits using discharge tubes or semiconductor devices
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Emergency Protection Circuit Devices (AREA)
- Selective Calling Equipment (AREA)
- Microwave Tubes (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US180717A US2220379A (en) | 1937-12-20 | 1937-12-20 | Magnetron telegraphic repeater |
Publications (1)
Publication Number | Publication Date |
---|---|
FR847831A true FR847831A (en) | 1939-10-17 |
Family
ID=22661487
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR847831D Expired FR847831A (en) | 1937-12-20 | 1938-12-20 | Telegraph repeater systems |
Country Status (4)
Country | Link |
---|---|
US (1) | US2220379A (en) |
DE (1) | DE902502C (en) |
FR (1) | FR847831A (en) |
GB (1) | GB504708A (en) |
-
1937
- 1937-12-20 US US180717A patent/US2220379A/en not_active Expired - Lifetime
-
1938
- 1938-11-22 GB GB33946/38A patent/GB504708A/en not_active Expired
- 1938-12-16 DE DET2153D patent/DE902502C/en not_active Expired
- 1938-12-20 FR FR847831D patent/FR847831A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB504708A (en) | 1939-04-28 |
DE902502C (en) | 1954-01-25 |
US2220379A (en) | 1940-11-05 |
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