BE501904A - - Google Patents
Info
- Publication number
- BE501904A BE501904A BE501904DA BE501904A BE 501904 A BE501904 A BE 501904A BE 501904D A BE501904D A BE 501904DA BE 501904 A BE501904 A BE 501904A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
- H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
- H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Selective Calling Equipment (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL291949X | 1950-03-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE501904A true BE501904A (it) |
Family
ID=19782799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE501904D BE501904A (it) | 1950-03-17 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US2654002A (it) |
| BE (1) | BE501904A (it) |
| CH (1) | CH291949A (it) |
| FR (1) | FR1034010A (it) |
| GB (1) | GB698054A (it) |
| NL (1) | NL80725C (it) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE514053A (it) * | 1951-09-10 | |||
| US2826638A (en) * | 1952-04-26 | 1958-03-11 | Bell Telephone Labor Inc | Signaling system |
| US2749390A (en) * | 1952-12-02 | 1956-06-05 | Itt | Ringing circuit for telephone line and radio order wire |
| FR1096496A (fr) * | 1953-12-16 | 1955-06-21 | Lignes Telegraph Telephon | Dispositif récepteur sélectif pour signaux d'appel pour systemes de télécommunication |
| FR1096599A (fr) * | 1953-12-22 | 1955-06-22 | Lignes Telegraph Telephon | Dispositif comportant des éléments non linéaires associés à des circuits sélectifs |
| US2806903A (en) * | 1954-03-24 | 1957-09-17 | Int Standard Electric Corp | Voice frequency signal receivers |
| US2957950A (en) * | 1954-11-18 | 1960-10-25 | Bell Telephone Labor Inc | Transistor selective ringing circuit |
| US2931956A (en) * | 1956-02-06 | 1960-04-05 | Elliott & Evans Inc | Regenerative radio receiver for remotely controlled relay |
| US3087999A (en) * | 1959-12-08 | 1963-04-30 | Motorola Inc | Mobile dialing system |
| US3143602A (en) * | 1961-05-19 | 1964-08-04 | Bell Telephone Labor Inc | Multifrequency signal receiver |
| US3341815A (en) * | 1962-12-31 | 1967-09-12 | Bunker Ramo | Frequency responsive receiving system with noise prevention |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE347704A (it) * | 1927-01-04 | |||
| US1711651A (en) * | 1927-01-29 | 1929-05-07 | Bell Telephone Labor Inc | Signaling system |
| US2145053A (en) * | 1936-11-18 | 1939-01-24 | Bell Telephone Labor Inc | Signaling system |
| US2282131A (en) * | 1940-01-12 | 1942-05-05 | Associated Electric Lab Inc | Electrical signaling system |
| GB541731A (en) * | 1940-06-07 | 1941-12-09 | Telephone Mfg Co Ltd | Improvements in and relating to telephone and like systems |
| US2293869A (en) * | 1940-09-14 | 1942-08-25 | Bell Telephone Labor Inc | Signaling system |
-
0
- BE BE501904D patent/BE501904A/xx unknown
- NL NL80725D patent/NL80725C/xx active
-
1951
- 1951-03-03 US US213784A patent/US2654002A/en not_active Expired - Lifetime
- 1951-03-14 GB GB6161/51A patent/GB698054A/en not_active Expired
- 1951-03-15 FR FR1034010D patent/FR1034010A/fr not_active Expired
- 1951-03-16 CH CH291949D patent/CH291949A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| US2654002A (en) | 1953-09-29 |
| CH291949A (de) | 1953-07-15 |
| GB698054A (en) | 1953-10-07 |
| NL80725C (it) | |
| FR1034010A (fr) | 1953-07-17 |