NL279905A - - Google Patents
Info
- Publication number
- NL279905A NL279905A NL279905DA NL279905A NL 279905 A NL279905 A NL 279905A NL 279905D A NL279905D A NL 279905DA NL 279905 A NL279905 A NL 279905A
- 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
- H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/515—Devices for calling a subscriber by generating or selecting signals other than trains of pulses of similar shape, or signals other than currents of one or more different frequencies, e.g. generation of dc signals of alternating polarity, coded pulses or impedance dialling
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
- Near-Field Transmission Systems (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEST17973A DE1136748B (de) | 1961-06-20 | 1961-06-20 | Verfahren und Schaltungsanordnung zur Signalgabe ueber Fernmelde-, insbesondere Fernsprechleitungen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL279905A true NL279905A (fr) |
Family
ID=7457670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL279905D NL279905A (fr) | 1961-06-20 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3294923A (fr) |
| BE (1) | BE619155A (fr) |
| CH (1) | CH408131A (fr) |
| DE (1) | DE1136748B (fr) |
| GB (1) | GB1003017A (fr) |
| NL (1) | NL279905A (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5787437U (fr) * | 1980-11-19 | 1982-05-29 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE510536A (fr) * | 1951-04-10 | |||
| US2957952A (en) * | 1958-05-09 | 1960-10-25 | Bell Telephone Labor Inc | Code generator |
| US3094630A (en) * | 1959-11-25 | 1963-06-18 | Philco Corp | Pulse counter employing tunnel diodes with reset means |
| US3094631A (en) * | 1960-03-01 | 1963-06-18 | Ibm | Pulse counter using tunnel diodes and having an energy storage device across the diodes |
-
0
- NL NL279905D patent/NL279905A/xx unknown
-
1961
- 1961-06-20 DE DEST17973A patent/DE1136748B/de active Pending
-
1962
- 1962-06-12 US US201856A patent/US3294923A/en not_active Expired - Lifetime
- 1962-06-15 GB GB23117/62A patent/GB1003017A/en not_active Expired
- 1962-06-20 CH CH740662A patent/CH408131A/de unknown
- 1962-06-20 BE BE619155A patent/BE619155A/nl unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE1136748B (de) | 1962-09-20 |
| CH408131A (de) | 1966-02-28 |
| US3294923A (en) | 1966-12-27 |
| GB1003017A (en) | 1965-09-02 |
| BE619155A (nl) | 1962-12-20 |