NL39470B - - Google Patents
Info
- Publication number
- NL39470B NL39470B NL39470DB NL39470B NL 39470 B NL39470 B NL 39470B NL 39470D B NL39470D B NL 39470DB NL 39470 B NL39470 B NL 39470B
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/42—Circuits for by-passing of ringing signals
-
- 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)
- Signal Processing (AREA)
- Selective Calling Equipment (AREA)
- Devices For Supply Of Signal Current (AREA)
- Mobile Radio Communication Systems (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE283135T | 1927-01-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL39470B true NL39470B (https=) |
Family
ID=31944976
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL39470D NL39470B (https=) | 1927-01-04 | ||
| NL26143D NL26143C (https=) | 1927-01-04 |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL26143D NL26143C (https=) | 1927-01-04 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US1958166A (https=) |
| BE (1) | BE347704A (https=) |
| DE (1) | DE609601C (https=) |
| GB (1) | GB283135A (https=) |
| NL (2) | NL26143C (https=) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE742806C (de) * | 1938-09-01 | 1943-12-11 | Siemens Ag | UEbertragungssystem mit Pegelregulierung durch eine Steuerfrequenz, bei dem das Ansprechen des Steuerfrequenzempfaengers auf die Nutzfrequenzen verhindert ist |
| DE745228C (de) * | 1939-07-28 | 1944-03-01 | Siemens Ag | Elektrischer Signalempfaenger |
| BE454346A (https=) * | 1943-03-08 | |||
| FR996042A (fr) * | 1945-04-14 | 1951-12-12 | Perfectionnement aux signaleurs d'impulsions | |
| BE478607A (https=) * | 1945-12-20 | |||
| FR928242A (fr) * | 1946-05-18 | 1947-11-21 | Materiel Telephonique | Systèmes de signalisation électrique |
| US2511617A (en) * | 1946-10-11 | 1950-06-13 | Bell Telephone Laboroatories I | Power line carrier frequency telephone system |
| FR961481A (https=) * | 1947-02-21 | 1950-05-12 | ||
| DE841765C (de) * | 1948-10-02 | 1952-06-19 | Normalzeit G M B H | Schaltungsanordnung fuer Fernsprechanlagen mit Tonfrequenzwahl |
| NL80725C (https=) * | 1950-03-17 | |||
| DE954519C (de) * | 1951-12-13 | 1956-12-20 | Standard Elek K Ag | Schaltungsanordnung zum Empfang von Ruf- und Wahlzeichen |
| US2935731A (en) * | 1957-02-26 | 1960-05-03 | Richter Robert | Selective signalling system |
-
0
- NL NL39470D patent/NL39470B/xx unknown
- BE BE347704D patent/BE347704A/xx unknown
- NL NL26143D patent/NL26143C/xx active
-
1927
- 1927-12-22 US US241979A patent/US1958166A/en not_active Expired - Lifetime
- 1927-12-28 GB GB35140/27A patent/GB283135A/en not_active Expired
- 1927-12-29 DE DET34424D patent/DE609601C/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL26143C (https=) | |
| US1958166A (en) | 1934-05-08 |
| BE347704A (https=) | |
| GB283135A (https=) | 1928-03-29 |
| DE609601C (de) | 1935-02-23 |