BE331740A - - Google Patents
Info
- Publication number
- BE331740A BE331740A BE331740DA BE331740A BE 331740 A BE331740 A BE 331740A BE 331740D A BE331740D A BE 331740DA BE 331740 A BE331740 A BE 331740A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/54—Circuits using the same frequency for two directions of communication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/44—Transmit/receive switching
- H04B1/46—Transmit/receive switching by voice-frequency signals; by pilot signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/04—Control of transmission; Equalising
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US752243A US1696566A (en) | 1924-11-25 | 1924-11-25 | High-frequency duplex signaling system |
| US227821A US1696590A (en) | 1924-11-25 | 1927-10-21 | Signaling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE331740A true BE331740A (en) |
Family
ID=26921788
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE355192D BE355192A (en) | 1924-11-25 | ||
| BE331740D BE331740A (en) | 1924-11-25 |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE355192D BE355192A (en) | 1924-11-25 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US1696590A (en) |
| BE (2) | BE331740A (en) |
| DE (2) | DE500530C (en) |
| FR (1) | FR606311A (en) |
| GB (2) | GB243683A (en) |
| NL (2) | NL24644C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE755785C (en) * | 1933-03-16 | 1952-03-31 | Marconi Wireless Telegraph Co | Arrangement for the automatic activation of a transmitter with the help of rectified modulation oscillations |
-
0
- NL NL18958D patent/NL18958C/xx active
- BE BE355192D patent/BE355192A/xx unknown
- NL NL24644D patent/NL24644C/xx active
- BE BE331740D patent/BE331740A/xx unknown
-
1925
- 1925-09-04 FR FR606311D patent/FR606311A/en not_active Expired
- 1925-09-29 DE DEI26703D patent/DE500530C/en not_active Expired
- 1925-10-06 GB GB24878/25A patent/GB243683A/en not_active Expired
-
1927
- 1927-10-21 US US227821A patent/US1696590A/en not_active Expired - Lifetime
-
1928
- 1928-10-21 DE DEI35835D patent/DE500305C/en not_active Expired
- 1928-10-22 GB GB30503/28A patent/GB299316A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE500305C (en) | 1930-06-20 |
| GB299316A (en) | 1929-06-27 |
| GB243683A (en) | 1926-07-22 |
| NL24644C (en) | |
| DE500530C (en) | 1930-06-21 |
| FR606311A (en) | 1926-06-11 |
| BE355192A (en) | |
| NL18958C (en) | |
| US1696590A (en) | 1928-12-25 |