BE560458A - - Google Patents

Info

Publication number: BE560458A
Authority: BE; Belgium

Application number

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1954-02-08

Publication of BE560458A publication Critical patent/BE560458A/xx

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)

BE560458D 1954-02-08 BE560458A (pt)

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 (pt)

Family

ID=32396016

Family Applications (3)

Application Number	Title	Priority Date	Filing Date
BE560458D BE560458A (pt)	1954-02-08
BE535520D BE535520A (pt)	1954-02-08
BE553926D BE553926A (pt)	1954-02-08

Family Applications After (2)

Application Number	Title	Priority Date	Filing Date
BE535520D BE535520A (pt)	1954-02-08
BE553926D BE553926A (pt)	1954-02-08

Country Status (6)

Country	Link
US (2)	US2838612A (pt)
BE (3)	BE553926A (pt)
CH (2)	CH329937A (pt)
DE (2)	DE1031357B (pt)
FR (5)	FR1119874A (pt)
GB (2)	GB859111A (pt)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE1074088B (de) *		1960-01-28	Krone Kommanditgesellschaft, Berlin-Zehlendorf	Fernsprechapparat mit einem Transistor-Sprechverstärker
BE560458A (pt) *	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 (pt) *	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)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US1872347A (en) *	1929-03-30	1932-08-16	Rca Corp	Amplifier tube control
NL40011C (pt) *	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 (pt) *	1954-02-08
BE543085A (pt) *	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
DE1134119B (de)	1962-08-02
GB865012A (en)	1961-04-12
BE535520A (pt)
CH354121A (de)	1961-05-15
FR78554E (fr)	1962-08-10
FR69988E (fr)	1959-01-30
BE553926A (pt)
CH329937A (de)	1958-05-15
US2838612A (en)	1958-06-10
US2950351A (en)	1960-08-23
GB859111A (en)	1961-01-18
FR1119874A (fr)	1956-06-26
DE1031357B (de)	1958-06-04
FR72139E (fr)	1960-03-30
FR70935E (fr)	1959-09-30

Publication	Publication Date	Title
AT195977B (pt)	1958-02-25
AT195459B (pt)	1958-02-10
AT196304B (pt)	1958-03-10
FR65897E (pt)	1956-03-22
FR1056298A (pt)	1954-02-25
AT197898B (pt)	1958-05-27
AT195345B (pt)	1958-01-25
AT195836B (pt)	1958-02-25
FR1074439A (pt)	1954-10-05
AT196486B (pt)	1958-03-25
DE1066924B (pt)
AT196701B (pt)	1958-03-25
AT196784B (pt)	1958-03-25
AT195139B (pt)	1958-01-25
AT195335B (pt)	1958-01-25
AT195552B (pt)	1958-02-10
AT195750B (pt)	1958-02-25
AT195822B (pt)	1958-02-25
AT195943B (pt)	1958-02-25
AT196650B (pt)	1958-03-25
AT197095B (pt)	1958-04-10
AT196786B (pt)	1958-03-25
AT197192B (pt)	1958-04-10
AT214341B (pt)	1961-03-27
AT199414B (pt)	1958-09-10