BE407035A - - Google Patents

Info

Publication number
BE407035A
BE407035A BE407035DA BE407035A BE 407035 A BE407035 A BE 407035A BE 407035D A BE407035D A BE 407035DA BE 407035 A BE407035 A BE 407035A
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.)
Filing date
Publication date
Application filed filed Critical
Publication of BE407035A publication Critical patent/BE407035A/xx

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
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/001—Two-way communication systems between a limited number of parties

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Devices For Supply Of Signal Current (AREA)
BE407035D 1933-12-30 1934-12-27 BE407035A (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR449609X 1933-12-30

Publications (1)

Publication Number Publication Date
BE407035A true BE407035A (de) 1935-01-30

Family

ID=8900758

Family Applications (1)

Application Number Title Priority Date Filing Date
BE407035D BE407035A (de) 1933-12-30 1934-12-27

Country Status (4)

Country Link
US (1) US2102903A (de)
BE (1) BE407035A (de)
FR (2) FR789510A (de)
GB (1) GB449609A (de)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE972766C (de) * 1941-12-14 1959-09-24 Normalzeit G M B H Sprechanlage mit mehreren Stationen und zentralem Verstaerker
CH258989A (de) * 1942-12-04 1948-12-31 Autophon Ag Anordnung zum Umschalten der Sprechrichtung in Wechselsprechanlagen für lautstarken Verkehr.
CH258725A (de) * 1942-12-21 1948-12-15 Autophon Ag Ferneinschaltbarer Selbstanschluss-Fernsprecher für lautstarken Verkehr.
US2477275A (en) * 1944-01-15 1949-07-26 Firm Autophon Ag Voice-controlled two-way communication system
US2427983A (en) * 1944-03-09 1947-09-23 Autophon Ag Switching arrangement in duplex loud speaking systems
CH250532A (de) * 1944-10-21 1947-08-31 Autophon Ag Anordnung in einer Wechselsprechanlage für lautstarken Verkehr.
US2451339A (en) * 1945-02-08 1948-10-12 Automatic Elect Lab Intercommunicating system
US2427850A (en) * 1945-03-17 1947-09-23 Rca Corp Switching method and system
US2584790A (en) * 1945-12-18 1952-02-05 Rca Corp Switching circuit
US2694749A (en) * 1950-04-18 1954-11-16 Sepco 45 B D Sebastopol Communication system
DE1020371B (de) * 1952-10-15 1957-12-05 Svenska Relaefab Ab Wechselsprechanlage mit wahlweise durch die Sprechstroeme oder von Hand gesteuerter Umschaltung der Verkehrsrichtung
DE956693C (de) * 1953-03-19 1957-01-24 Telefunken Gmbh Schaltungsanordnung fuer Gegensprechanlagen
US2819340A (en) * 1953-11-17 1958-01-07 Stanley S Brody Voice operated intercommunication system
DE958935C (de) * 1954-02-08 1957-02-28 Telefunken Gmbh Schaltungsanordnung fuer sprachgesteuerte Echo- und Rueckkopplungssperren in Gegensprechanlagen mit Lautsprecherbetrieb
DE1019706B (de) * 1954-12-14 1957-11-21 Svenska Relaefab Ab Wechselsprechanlage mit wahlweise durch die Sprechstroeme oder von Hand gesteuerter Umschaltung der UEbertragungsrichtung
US3023273A (en) * 1957-09-25 1962-02-27 Liberman Arie Communication system
US3439121A (en) * 1965-09-30 1969-04-15 Bell Telephone Labor Inc Multiple channel loud-speaking telephone

Also Published As

Publication number Publication date
FR46765E (fr) 1936-09-11
FR789510A (fr) 1935-10-30
GB449609A (en) 1936-06-24
US2102903A (en) 1937-12-21

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