FR51277E - Coupling system to exert a control effect dependent on two voltages, in particular for echo and feedback suppressors - Google Patents

Coupling system to exert a control effect dependent on two voltages, in particular for echo and feedback suppressors

Info

Publication number
FR51277E
FR51277E FR51277DA FR51277E FR 51277 E FR51277 E FR 51277E FR 51277D A FR51277D A FR 51277DA FR 51277 E FR51277 E FR 51277E
Authority
FR
France
Prior art keywords
suppressors
echo
exert
voltages
feedback
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fides Gesellschaft fuer die Verwaltung und Verwertung von Gewerblichen Schutzrechten mbH
Original Assignee
Fides Gesellschaft fuer die Verwaltung und Verwertung von Gewerblichen Schutzrechten mbH
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.)
Filing date
Publication date
Application filed by Fides Gesellschaft fuer die Verwaltung und Verwertung von Gewerblichen Schutzrechten mbH filed Critical Fides Gesellschaft fuer die Verwaltung und Verwertung von Gewerblichen Schutzrechten mbH
Application granted granted Critical
Publication of FR51277E publication Critical patent/FR51277E/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/44—Transmit/receive switching
    • H04B1/46—Transmit/receive switching by voice-frequency signals; by pilot signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
FR51277D 1937-09-08 1940-12-24 Coupling system to exert a control effect dependent on two voltages, in particular for echo and feedback suppressors Expired FR51277E (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1937S0128684 DE694606C (en) 1937-09-08 1937-09-08 Circuit arrangement for exercising a control effect as a function of two voltages caused by the speech currents of the two directions of speech
DES0139669 1939-12-29

Publications (1)

Publication Number Publication Date
FR51277E true FR51277E (en) 1942-02-18

Family

ID=7537885

Family Applications (2)

Application Number Title Priority Date Filing Date
FR843122D Expired FR843122A (en) 1937-09-08 1938-09-06 Coupling system to exert a control effect dependent on two voltages, in particular for echo and feedback suppressors
FR51277D Expired FR51277E (en) 1937-09-08 1940-12-24 Coupling system to exert a control effect dependent on two voltages, in particular for echo and feedback suppressors

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR843122D Expired FR843122A (en) 1937-09-08 1938-09-06 Coupling system to exert a control effect dependent on two voltages, in particular for echo and feedback suppressors

Country Status (5)

Country Link
US (1) US2229806A (en)
CH (2) CH206313A (en)
DE (1) DE694606C (en)
FR (2) FR843122A (en)
NL (1) NL52577C (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE759529C (en) * 1940-04-26 1954-05-03 Hell Rudolf Dr Ing Feedback lock
US2615997A (en) * 1946-12-13 1952-10-28 Kellogg Switchboard & Supply Telephone repeater
DE925833C (en) * 1950-12-19 1955-03-31 Normalzeit G M B H Circuit arrangement for intercom systems
US3250988A (en) * 1960-12-06 1966-05-10 Western Electric Co Testing apparatus for determining the operate and release currents of relays

Also Published As

Publication number Publication date
DE694606C (en) 1940-08-05
US2229806A (en) 1941-01-28
FR843122A (en) 1939-06-26
CH206313A (en) 1939-07-31
CH219592A (en) 1942-02-15
NL52577C (en) 1942-06-15

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