BE512760A - - Google Patents
Info
- Publication number
- BE512760A BE512760A BE512760DA BE512760A BE 512760 A BE512760 A BE 512760A BE 512760D A BE512760D A BE 512760DA BE 512760 A BE512760 A BE 512760A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
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- 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
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- 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)
- Devices For Supply Of Signal Current (AREA)
- Meter Arrangements (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE704650X | 1951-07-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE512760A true BE512760A (US07122603-20061017-C00294.png) |
Family
ID=20315551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE512760D BE512760A (US07122603-20061017-C00294.png) | 1951-07-13 |
Country Status (5)
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE975971C (de) * | 1955-04-05 | 1962-12-27 | Angelika Kunckel | Tragbarer Fernsprechapparat mit Ortsbatterie |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL96910C (US07122603-20061017-C00294.png) * | 1954-10-25 | |||
| NL100359C (US07122603-20061017-C00294.png) * | 1957-03-14 | |||
| US3045069A (en) * | 1957-05-09 | 1962-07-17 | Dictaphone Corp | Remote control system |
| GB852198A (en) * | 1957-11-06 | 1960-10-26 | Ericsson Telefon Ab L M | Improvements in or relating to apparatus for sending signals indicative of the values of coins inserted into a coin operated telephone instrument, to a control device inan automatic telephone exchange |
| US3060275A (en) * | 1958-11-07 | 1962-10-23 | Bell Telephone Labor Inc | Telephone system signaling |
| DE1128472B (de) * | 1960-10-12 | 1962-04-26 | Siemens Ag | Schaltungsanordnung fuer Teilnehmerstellen, insbesondere an Gesellschaftsleitungen, in Fernmelde-, insbesondere Fernsprech-anlagen, zur Anwendung von tonfrequenten Kennzeichen |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR959688A (US07122603-20061017-C00294.png) * | 1950-03-31 | |||
| GB418004A (en) * | 1933-04-21 | 1934-10-17 | Gen Electric Co Ltd | Improvements in or relating to telephone systems |
| US2228113A (en) * | 1937-11-05 | 1941-01-07 | Bell Telephone Labor Inc | Selective system |
| US2317191A (en) * | 1941-01-24 | 1943-04-20 | Bell Telephone Labor Inc | Telephone system |
| US2554201A (en) * | 1946-06-19 | 1951-05-22 | Ericsson Telefon Ab L M | Key-sending automatic telephone signaling system |
-
0
- US US2732432D patent/US2732432A/en not_active Expired - Lifetime
- BE BE512760D patent/BE512760A/xx unknown
-
1952
- 1952-07-05 FR FR1066199D patent/FR1066199A/fr not_active Expired
- 1952-07-09 DE DET6429A patent/DE932502C/de not_active Expired
- 1952-07-11 GB GB17599/52A patent/GB704650A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE975971C (de) * | 1955-04-05 | 1962-12-27 | Angelika Kunckel | Tragbarer Fernsprechapparat mit Ortsbatterie |
Also Published As
| Publication number | Publication date |
|---|---|
| GB704650A (en) | 1954-02-24 |
| US2732432A (en) | 1956-01-24 |
| DE932502C (de) | 1955-09-01 |
| FR1066199A (fr) | 1954-06-02 |
