BE797143A - Dispositif audio-visuel avec un nombre de conducteurs reduit, notamment entre l'entree d'une habitation individuelle et quelques postes interieurs de celle-ci - Google Patents

Dispositif audio-visuel avec un nombre de conducteurs reduit, notamment entre l'entree d'une habitation individuelle et quelques postes interieurs de celle-ci

Info

Publication number
BE797143A
BE797143A BE6044069A BE6044069A BE797143A BE 797143 A BE797143 A BE 797143A BE 6044069 A BE6044069 A BE 6044069A BE 6044069 A BE6044069 A BE 6044069A BE 797143 A BE797143 A BE 797143A
Authority
BE
Belgium
Prior art keywords
conductors
audio
entry
reduced number
visual device
Prior art date
Application number
BE6044069A
Other languages
English (en)
French (fr)
Original Assignee
Barbuti Ottorino
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 Barbuti Ottorino filed Critical Barbuti Ottorino
Publication of BE797143A publication Critical patent/BE797143A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • H04N7/183—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source
    • H04N7/186—Video door telephones
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
    • G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
BE6044069A 1972-03-23 1973-03-21 Dispositif audio-visuel avec un nombre de conducteurs reduit, notamment entre l'entree d'une habitation individuelle et quelques postes interieurs de celle-ci BE797143A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2141472 1972-03-23

Publications (1)

Publication Number Publication Date
BE797143A true BE797143A (fr) 1973-07-16

Family

ID=11181404

Family Applications (1)

Application Number Title Priority Date Filing Date
BE6044069A BE797143A (fr) 1972-03-23 1973-03-21 Dispositif audio-visuel avec un nombre de conducteurs reduit, notamment entre l'entree d'une habitation individuelle et quelques postes interieurs de celle-ci

Country Status (3)

Country Link
BE (1) BE797143A (de)
DE (1) DE2306109A1 (de)
FR (1) FR2177411A7 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1165528B (it) * 1980-12-15 1987-04-22 Urmet Spa Impianto citofonico con trasmissione di immagine impiegantte quattro conduttori comuni ed un conduttore di selezione per ciascun posto interno

Also Published As

Publication number Publication date
FR2177411A7 (de) 1973-11-02
DE2306109A1 (de) 1973-10-04

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