BE560458A - - Google Patents
Info
- Publication number
- BE560458A BE560458A BE560458DA BE560458A BE 560458 A BE560458 A BE 560458A BE 560458D A BE560458D A BE 560458DA BE 560458 A BE560458 A BE 560458A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
- H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/58—Anti-side-tone circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/58—Anti-side-tone circuits
- H04M1/585—Anti-side-tone circuits implemented without inductive element
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Amplifiers (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB329937X | 1954-02-08 | ||
| GB2950351X | 1956-01-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE560458A true BE560458A (es) |
Family
ID=32396016
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE560458D BE560458A (es) | 1954-02-08 | ||
| BE535520D BE535520A (es) | 1954-02-08 | ||
| BE553926D BE553926A (es) | 1954-02-08 |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE535520D BE535520A (es) | 1954-02-08 | ||
| BE553926D BE553926A (es) | 1954-02-08 |
Country Status (6)
| Country | Link |
|---|---|
| US (2) | US2838612A (es) |
| BE (3) | BE553926A (es) |
| CH (2) | CH329937A (es) |
| DE (2) | DE1031357B (es) |
| FR (5) | FR1119874A (es) |
| GB (2) | GB859111A (es) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1074088B (de) * | 1960-01-28 | Krone Kommanditgesellschaft, Berlin-Zehlendorf | Fernsprechapparat mit einem Transistor-Sprechverstärker | |
| BE560458A (es) * | 1954-02-08 | |||
| CH369172A (de) * | 1954-02-08 | 1963-05-15 | Standard Telephon & Radio Ag | Telephonteilnehmerstation |
| US3066195A (en) * | 1958-09-15 | 1962-11-27 | Gen Dynamics Corp | Signal transmitting and receiving station |
| NL247967A (es) * | 1959-02-02 | |||
| US3170043A (en) * | 1961-09-29 | 1965-02-16 | Bell Telephone Labor Inc | Telephone anti-sidetone circuit |
| US3254160A (en) * | 1962-12-27 | 1966-05-31 | Gai Tronics Corp | Regulated gain telephone handset receiver amplifier |
| US3250861A (en) * | 1963-04-19 | 1966-05-10 | Robert D Babylon | Railroad way station telephone amplifier |
| US3462560A (en) * | 1966-04-06 | 1969-08-19 | Bell Telephone Labor Inc | Subscriber telephone circuit with resistance hybrid sidetone balancing network |
| US3440367A (en) * | 1966-05-06 | 1969-04-22 | Bell Telephone Labor Inc | Nonreactive antisidetone network for a telephone set |
| US3479468A (en) * | 1967-03-10 | 1969-11-18 | Bell Telephone Labor Inc | Circuit for enabling simultaneous transmission in both directions on a two-wire line |
| US3529099A (en) * | 1967-05-10 | 1970-09-15 | Itt | Telephone subset with resistive hybrid network |
| US3711660A (en) * | 1969-12-04 | 1973-01-16 | Univ Monash | Hybrid networks |
| BE794023A (fr) * | 1972-01-20 | 1973-05-02 | Western Electric Co | Amplificateur alimente par la ligne meme dans laquelle il debite |
| CH549914A (de) * | 1972-03-10 | 1974-05-31 | Zellweger Uster Ag | Uebertragungseinrichtung mit einer gabelschaltung. |
| DE2840250C2 (de) * | 1978-09-15 | 1983-01-20 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung für eine leitungsgespeiste Lautfernsprechstation |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1872347A (en) * | 1929-03-30 | 1932-08-16 | Rca Corp | Amplifier tube control |
| NL40011C (es) * | 1932-04-30 | 1937-02-15 | ||
| DE672791C (de) * | 1932-07-23 | 1939-03-10 | Werner Nestel Dipl Ing | Verfahren zur Verminderung des Anodenstromverbrauches von Verstaerkern |
| GB679875A (en) * | 1949-03-16 | 1952-09-24 | Siemens Ag | Improvements in or relating to an arrangement for telephone subscribers sets |
| US2858371A (en) * | 1953-07-01 | 1958-10-28 | Gen Electric Co Ltd | Telephone subscribers' apparatus |
| BE560458A (es) * | 1954-02-08 | |||
| BE543085A (es) * | 1954-12-30 |
-
0
- BE BE560458D patent/BE560458A/xx unknown
- BE BE535520D patent/BE535520A/xx unknown
- BE BE553926D patent/BE553926A/xx unknown
-
1955
- 1955-02-02 US US485707A patent/US2838612A/en not_active Expired - Lifetime
- 1955-02-05 DE DEI9764A patent/DE1031357B/de active Pending
- 1955-02-08 CH CH329937D patent/CH329937A/de unknown
- 1955-02-08 FR FR1119874D patent/FR1119874A/fr not_active Expired
-
1956
- 1956-05-04 FR FR69988D patent/FR69988E/fr not_active Expired
- 1956-08-31 GB GB26730/56A patent/GB859111A/en not_active Expired
- 1956-12-19 US US629390A patent/US2950351A/en not_active Expired - Lifetime
- 1956-12-29 CH CH354121D patent/CH354121A/de unknown
-
1957
- 1957-01-03 FR FR70935D patent/FR70935E/fr not_active Expired
- 1957-07-31 FR FR72139D patent/FR72139E/fr not_active Expired
- 1957-08-30 DE DEJ13647A patent/DE1134119B/de active Pending
- 1957-12-20 GB GB39641/57A patent/GB865012A/en not_active Expired
-
1958
- 1958-12-19 FR FR782138A patent/FR78554E/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2838612A (en) | 1958-06-10 |
| CH354121A (de) | 1961-05-15 |
| FR1119874A (fr) | 1956-06-26 |
| FR72139E (fr) | 1960-03-30 |
| BE535520A (es) | |
| FR70935E (fr) | 1959-09-30 |
| CH329937A (de) | 1958-05-15 |
| GB859111A (en) | 1961-01-18 |
| DE1134119B (de) | 1962-08-02 |
| US2950351A (en) | 1960-08-23 |
| GB865012A (en) | 1961-04-12 |
| BE553926A (es) | |
| DE1031357B (de) | 1958-06-04 |
| FR78554E (fr) | 1962-08-10 |
| FR69988E (fr) | 1959-01-30 |