NL150653B - Multifrequentie-signaalontvanginrichting. - Google Patents
Multifrequentie-signaalontvanginrichting.Info
- Publication number
- NL150653B NL150653B NL656505432A NL6505432A NL150653B NL 150653 B NL150653 B NL 150653B NL 656505432 A NL656505432 A NL 656505432A NL 6505432 A NL6505432 A NL 6505432A NL 150653 B NL150653 B NL 150653B
- Authority
- NL
- Netherlands
- Prior art keywords
- signal receiver
- multifrequency signal
- multifrequency
- receiver
- signal
- Prior art date
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
- H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
- H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Measurement Of Predetermined Time Intervals (AREA)
- Amplifiers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US366463A US3319011A (en) | 1964-05-11 | 1964-05-11 | Multifrequency signal receiver circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
NL6505432A NL6505432A (xx) | 1965-11-12 |
NL150653B true NL150653B (nl) | 1976-08-16 |
Family
ID=23443110
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL656505432A NL150653B (nl) | 1964-05-11 | 1965-04-28 | Multifrequentie-signaalontvanginrichting. |
Country Status (6)
Country | Link |
---|---|
US (1) | US3319011A (xx) |
BE (1) | BE663635A (xx) |
DE (1) | DE1266827B (xx) |
GB (1) | GB1090885A (xx) |
NL (1) | NL150653B (xx) |
SE (1) | SE316814B (xx) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1232213B (de) * | 1964-12-15 | 1967-01-12 | Standard Elektrik Lorenz Ag | Tonfrequentes Tastwahlverfahren fuer Fernmelde-, insbesondere Fernsprechanlagen |
GB1226368A (xx) * | 1968-08-15 | 1971-03-24 | ||
US3539731A (en) * | 1968-11-05 | 1970-11-10 | Bell Telephone Labor Inc | Multifrequency signal receiver |
FR2141502B1 (xx) * | 1971-06-01 | 1973-06-29 | Ibm France | |
US4002848A (en) * | 1974-11-14 | 1977-01-11 | Reliable Electric Company | Toll fraud eliminator for telephone systems |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2468305A (en) * | 1946-11-01 | 1949-04-26 | Bell Telephone Labor Inc | Signaling system |
GB651457A (en) * | 1947-02-07 | 1951-04-04 | Standard Telephones Cables Ltd | Improvements in or relating to electric signalling systems |
NL267564A (xx) * | 1960-08-22 | |||
DE1157270B (de) * | 1961-10-20 | 1963-11-14 | Sueddeutsche Telefon App Kabel | Schaltungsanordnung zum Auswerten von Selektivrufsignalen in Fernmelde-, insbesondere Fernsprechanlagen |
US3140357A (en) * | 1962-06-28 | 1964-07-07 | Bell Telephone Labor Inc | Multifrequency receiver |
-
1964
- 1964-05-11 US US366463A patent/US3319011A/en not_active Expired - Lifetime
-
1965
- 1965-04-09 DE DEW38935A patent/DE1266827B/de active Pending
- 1965-04-20 GB GB16477/65A patent/GB1090885A/en not_active Expired
- 1965-04-28 NL NL656505432A patent/NL150653B/xx not_active IP Right Cessation
- 1965-05-07 BE BE663635D patent/BE663635A/xx unknown
- 1965-05-11 SE SE6143/65A patent/SE316814B/xx unknown
Also Published As
Publication number | Publication date |
---|---|
DE1266827B (de) | 1968-04-25 |
SE316814B (xx) | 1969-11-03 |
BE663635A (xx) | 1965-09-01 |
NL6505432A (xx) | 1965-11-12 |
US3319011A (en) | 1967-05-09 |
GB1090885A (en) | 1967-11-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
V1 | Lapsed because of non-payment of the annual fee | ||
NL80 | Abbreviated name of patent owner mentioned of already nullified patent |
Owner name: WESTERN ELECTRI |