NL52757C - - Google Patents
Info
- Publication number
- NL52757C NL52757C NL52757DA NL52757C NL 52757 C NL52757 C NL 52757C NL 52757D A NL52757D A NL 52757DA NL 52757 C NL52757 C NL 52757C
- 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
- H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
- H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency
-
- 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
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP2125D DE1080615B (en) | 1937-12-27 | 1937-12-27 | Signal receiver for carrier wave telephony systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL52757C true NL52757C (en) |
Family
ID=7357758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL52757D NL52757C (en) | 1937-12-27 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US2210957A (en) |
| BE (3) | BE431843A (en) |
| CH (1) | CH206315A (en) |
| DE (2) | DE1080615B (en) |
| FR (2) | FR848015A (en) |
| GB (3) | GB523068A (en) |
| NL (1) | NL52757C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2564378A (en) * | 1946-05-06 | 1951-08-14 | Punch Engineering Pty Ltd | Carrier system signaling circuits |
| FR965370A (en) * | 1947-04-29 | 1950-09-11 | ||
| NL72570C (en) * | 1949-09-02 | |||
| US2721979A (en) * | 1950-07-07 | 1955-10-25 | Westinghouse Air Brake Co | Switching and control means for carrier signaling and communication equipments |
| BE557017A (en) * | 1956-04-26 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT91298B (en) * | 1915-12-01 | 1923-02-10 | Western Electric Co Ltd | Device for simultaneous telegraphing and telephoning with or without wire. |
| US1484405A (en) * | 1920-01-12 | 1924-02-19 | Western Electric Co | Signaling system |
| DE497115C (en) * | 1928-12-29 | 1930-05-02 | Lorenz Akt Ges C | Arrangement for achieving high selectivity of electrical receiving devices |
| AT140823B (en) * | 1932-12-22 | 1935-02-25 | Siemens Ag | Multiple transmission system with carrier currents, especially for cable lines. |
| GB460428A (en) * | 1935-08-24 | 1937-01-27 | Philips Nv | Improvements in or relating to the transmission of ringing signals in carrier frequency telephony systems |
-
0
- NL NL52757D patent/NL52757C/xx active
- BE BE431870D patent/BE431870A/xx unknown
- BE BE431842D patent/BE431842A/xx unknown
- BE BE431843D patent/BE431843A/xx unknown
-
1937
- 1937-12-27 DE DEP2125D patent/DE1080615B/en active Pending
- 1937-12-28 DE DEN41472D patent/DE753441C/en not_active Expired
-
1938
- 1938-12-17 US US246457A patent/US2210957A/en not_active Expired - Lifetime
- 1938-12-23 GB GB37463/38A patent/GB523068A/en not_active Expired
- 1938-12-23 GB GB37462/38A patent/GB523067A/en not_active Expired
- 1938-12-23 GB GB37464/38A patent/GB504711A/en not_active Expired
- 1938-12-24 CH CH206315D patent/CH206315A/en unknown
- 1938-12-26 FR FR848015D patent/FR848015A/en not_active Expired
- 1938-12-26 FR FR848016D patent/FR848016A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB504711A (en) | 1939-04-28 |
| GB523068A (en) | 1940-07-04 |
| DE753441C (en) | 1944-08-03 |
| DE1080615B (en) | 1960-04-28 |
| BE431843A (en) | |
| US2210957A (en) | 1940-08-13 |
| CH206315A (en) | 1939-07-31 |
| BE431870A (en) | |
| FR848016A (en) | 1939-10-20 |
| GB523067A (en) | 1940-07-04 |
| BE431842A (en) | |
| FR848015A (en) | 1939-10-20 |