BE495507A - - Google Patents
Info
- Publication number
- BE495507A BE495507A BE495507DA BE495507A BE 495507 A BE495507 A BE 495507A BE 495507D A BE495507D A BE 495507DA BE 495507 A BE495507 A BE 495507A
- 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)
- Amplifiers (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2658112X | 1949-05-05 | ||
GB1198249A GB692476A (en) | 1949-05-27 | 1949-05-27 | Improvements relating to electrical signalling systems |
Publications (1)
Publication Number | Publication Date |
---|---|
BE495507A true BE495507A (fi) |
Family
ID=32299742
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE495507D BE495507A (fi) | 1949-05-05 |
Country Status (2)
Country | Link |
---|---|
US (1) | US2658112A (fi) |
BE (1) | BE495507A (fi) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2749390A (en) * | 1952-12-02 | 1956-06-05 | Itt | Ringing circuit for telephone line and radio order wire |
FR1096599A (fr) * | 1953-12-22 | 1955-06-22 | Lignes Telegraph Telephon | Dispositif comportant des éléments non linéaires associés à des circuits sélectifs |
US2816962A (en) * | 1954-11-10 | 1957-12-17 | T S Skillman And Company Pty L | Steady-state signalling using alternating currents |
US2957950A (en) * | 1954-11-18 | 1960-10-25 | Bell Telephone Labor Inc | Transistor selective ringing circuit |
US2955161A (en) * | 1956-06-29 | 1960-10-04 | Automatic Elect Lab | Tone detector for coin control |
US3124658A (en) * | 1958-02-28 | 1964-03-10 | Input | |
US3090838A (en) * | 1958-04-15 | 1963-05-21 | Westrex Company Ltd | Selective signaling system |
US3131264A (en) * | 1960-04-13 | 1964-04-28 | Int Standard Electric Corp | Multi-frequency signalling receivers |
US3143602A (en) * | 1961-05-19 | 1964-08-04 | Bell Telephone Labor Inc | Multifrequency signal receiver |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2173427A (en) * | 1937-08-30 | 1939-09-19 | Gen Radio Co | Electric oscillator |
US2237661A (en) * | 1937-10-07 | 1941-04-08 | Siemens App Und Maschinen Gmbh | Keying device for ultra-short-wave transmitters |
US2284855A (en) * | 1939-08-16 | 1942-06-02 | Bell Telephone Labor Inc | Amplifier circuits |
US2266541A (en) * | 1940-10-02 | 1941-12-16 | Rca Corp | Limiter output control |
US2316909A (en) * | 1941-05-15 | 1943-04-20 | Rca Corp | Selective tuned circuits |
US2350951A (en) * | 1941-10-31 | 1944-06-06 | Bell Telephone Labor Inc | Electric wave system |
US2397337A (en) * | 1942-09-10 | 1946-03-26 | Rca Corp | Protecting arrangement for thermionic valve circuits |
US2457131A (en) * | 1946-09-25 | 1948-12-28 | Faximile Inc | Facsimile overload control with nonlinear resistance in output |
US2496909A (en) * | 1947-10-01 | 1950-02-07 | Rca Corp | Pulse amplitude discrimination |
-
0
- BE BE495507D patent/BE495507A/xx unknown
-
1950
- 1950-04-12 US US155488A patent/US2658112A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US2658112A (en) | 1953-11-03 |