NL81161C - - Google Patents
Info
- Publication number
- NL81161C NL81161C NL81161DA NL81161C NL 81161 C NL81161 C NL 81161C NL 81161D A NL81161D A NL 81161DA NL 81161 C NL81161 C NL 81161C
- Authority
- NL
- Netherlands
Links
Classifications
-
- 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
- H04M1/30—Devices which can set up and transmit only one digit at a time
- H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Selective Calling Equipment (AREA)
- Exchange Systems With Centralized Control (AREA)
- Alarm Systems (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE691237X | 1950-07-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL81161C true NL81161C (enExample) |
Family
ID=20315203
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL81161D NL81161C (enExample) | 1950-07-21 | ||
| NL7003296.A NL162796B (nl) | 1950-07-21 | Waterdicht stopcontact. |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL7003296.A NL162796B (nl) | 1950-07-21 | Waterdicht stopcontact. |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2706746A (enExample) |
| DE (1) | DE886929C (enExample) |
| GB (1) | GB691237A (enExample) |
| NL (2) | NL162796B (enExample) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1001713B (de) * | 1953-12-07 | 1957-01-31 | Telefonbau & Normalzeit Gmbh | Telefonteilnehmerstation mit tastengesteuerter Frequenzwahl und einem Schichttransistoren enthaltenden Mikrophonverstaerker |
| NL96910C (enExample) * | 1954-10-25 | |||
| DE1085201B (de) * | 1955-01-19 | 1960-07-14 | Josef Dirr | Schaltungsanordnung zur Auswertung von ueber abgeriegelte Leitungen uebertragenen, zeitlich versetzten Wechselstromimpulsen einer Frequenz fuer die Identifizierung von Leitungen zur Gebuehrenerfassung in Fernmelde-, insbesondere Fernsprechanlagen |
| DE1017661B (de) * | 1956-01-30 | 1957-10-17 | Telefonbau & Normalzeit Gmbh | Einrichtung zur Nummernsendung in Form codifizierter Signale in Fernsprechapparaten |
| DE1039107B (de) * | 1956-06-28 | 1958-09-18 | Standard Elektrik Lorenz Ag | Schaltungsanordnung fuer elektrische, ueber Fernleitungen an eine Zentralbatterie angeschlossene Einrichtungen |
| US3076059A (en) * | 1958-06-20 | 1963-01-29 | Bell Telephone Labor Inc | Signaling system |
| CH379584A (de) * | 1958-09-03 | 1964-07-15 | Standard Telephon & Radio Ag | Elektrische Signalisier-Einrichtung |
| DE1090273B (de) * | 1959-05-09 | 1960-10-06 | Philips Nv | Schaltungsanordnung zur Auswertung von Signalen verschiedener Frequenzen in Fernmeldeanlagen |
| DE1082300B (de) * | 1959-06-04 | 1960-05-25 | Siemens Ag | Schaltungsanordnung fuer Teilnehmerstellen in Fernmelde-, insbesondere Fernsprech-anlagen mit Tastaturwahl |
| BE595602A (enExample) * | 1959-10-02 | |||
| DE1152447B (de) * | 1960-03-10 | 1963-08-08 | Neumann Elektronik Gmbh | Wechsel-Lautsprechanlage mit tongesteuerten Verbindungswegen |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2250100A (en) * | 1939-11-14 | 1941-07-22 | Bell Telephone Labor Inc | Signaling system |
| US2554201A (en) * | 1946-06-19 | 1951-05-22 | Ericsson Telefon Ab L M | Key-sending automatic telephone signaling system |
-
0
- NL NL81161D patent/NL81161C/xx active
- NL NL7003296.A patent/NL162796B/xx unknown
-
1951
- 1951-07-11 US US236242A patent/US2706746A/en not_active Expired - Lifetime
- 1951-07-21 DE DET4583A patent/DE886929C/de not_active Expired
- 1951-07-23 GB GB17438/51A patent/GB691237A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2706746A (en) | 1955-04-19 |
| DE886929C (de) | 1953-08-20 |
| GB691237A (en) | 1953-05-06 |
| NL162796B (nl) |