NL54271C - - Google Patents
Info
- Publication number
- NL54271C NL54271C NL95180A NL95180A NL54271C NL 54271 C NL54271 C NL 54271C NL 95180 A NL95180 A NL 95180A NL 95180 A NL95180 A NL 95180A NL 54271 C NL54271 C NL 54271C
- Authority
- NL
- Netherlands
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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/14—Arrangements providing for calling or supervisory signals
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Telephonic Communication Services (AREA)
- Meter Arrangements (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEN42451A DE722560C (de) | 1938-09-12 | 1938-09-12 | Signalempfaenger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL54271C true NL54271C (id) | 1943-04-15 |
Family
ID=27797497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL95180A NL54271C (id) | 1938-09-12 | 1939-09-11 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US2336768A (id) |
| BE (1) | BE436359A (id) |
| DE (1) | DE722560C (id) |
| FR (1) | FR862367A (id) |
| GB (1) | GB532597A (id) |
| NL (1) | NL54271C (id) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2440049A (en) * | 1945-06-30 | 1948-04-20 | Rca Corp | Electronic audio switch |
| US2490243A (en) * | 1947-06-12 | 1949-12-06 | Philco Corp | Electronic cycle counting circuit |
| US3611940A (en) * | 1948-02-27 | 1971-10-12 | Us Navy | Simplified proximity fuze and/or howitzer shells |
| US2681386A (en) * | 1948-07-13 | 1954-06-15 | Automatic Telephone & Elect | Electrical signaling system using nonlinear resistors for control |
| US2801290A (en) * | 1951-09-17 | 1957-07-30 | Telefunken Gmbh | Calling signal responder arrangements |
| DE1053579B (de) * | 1954-05-17 | 1959-03-26 | Telefunken Gmbh | Schaltungsanordnung fuer die Herstellung von Verbindungen in Fernmelde- und Fernsteueranlagen |
| US2830128A (en) * | 1954-12-21 | 1958-04-08 | Itt | Condenser-timed delayed signal repeater |
| US3048660A (en) * | 1958-07-31 | 1962-08-07 | Bell Telephone Labor Inc | Telephone pay station system |
-
1938
- 1938-09-12 DE DEN42451A patent/DE722560C/de not_active Expired
-
1939
- 1939-09-09 GB GB25503/39A patent/GB532597A/en not_active Expired
- 1939-09-11 NL NL95180A patent/NL54271C/xx active
- 1939-09-12 BE BE436359D patent/BE436359A/xx unknown
- 1939-10-02 US US297576A patent/US2336768A/en not_active Expired - Lifetime
- 1939-12-15 FR FR862367D patent/FR862367A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE436359A (id) | 1939-10-31 |
| US2336768A (en) | 1943-12-14 |
| DE722560C (de) | 1943-05-20 |
| FR862367A (fr) | 1941-03-05 |
| GB532597A (en) | 1941-01-28 |