ES8302937A1 - Instalacion citofonica con transmision de imagen,que utiliza cuatro conductores comunes y un conductor de seleccion para cada lugar interior . - Google Patents

Instalacion citofonica con transmision de imagen,que utiliza cuatro conductores comunes y un conductor de seleccion para cada lugar interior .

Info

Publication number
ES8302937A1
ES8302937A1 ES507959A ES507959A ES8302937A1 ES 8302937 A1 ES8302937 A1 ES 8302937A1 ES 507959 A ES507959 A ES 507959A ES 507959 A ES507959 A ES 507959A ES 8302937 A1 ES8302937 A1 ES 8302937A1
Authority
ES
Spain
Prior art keywords
transmitting
signal
devices
picture
telephone system
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
ES507959A
Other languages
English (en)
Other versions
ES507959A0 (es
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.)
URMET SpA
Original Assignee
URMET SpA
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 URMET SpA filed Critical URMET SpA
Publication of ES507959A0 publication Critical patent/ES507959A0/es
Publication of ES8302937A1 publication Critical patent/ES8302937A1/es
Expired legal-status Critical Current

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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/02—Telephonic communication systems specially adapted for combination with other electrical systems with bell or annunciator systems
    • H04M11/025—Door telephones

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Closed-Circuit Television Systems (AREA)

Abstract

INSTALACION CITOFONICA CON TRANSMISION DE IMAGEN, QUE UTILIZA CUATRO CONDUCTORES COMUNES Y UN CONDUCTOR DE SELECCION PARA CADA LUGAR INTERIOR. CONSTA DE LOS SIGUIENTES ELEMENTOS: 1<002> MEDIOS DE TRANSMISION DE LA SEÑAL FONICA Y DE TRANSMISION DE LA SEÑAL VISIVA. 2<002> MEDIOS DE RETRANSMISION DE LA SEÑAL FONICA Y REVELACION DE SEÑAL VISIVA. 3<002> MEDIOS PARA LA LLAMADA SELECTIVA Y EL MANDO DE UN CIERRE ELECTRICO. LA CORRIENTE DE LLAMADA SE DERIVA, PREVIO ENDEREZAMIENTO, SI SE ALTERNA A LAS PUNTAS DE POR LO MENOS UN RELE DE HABILITACION PROVISTO POR LO MENOS DE UN CONTACTO DE INTERCEPTACION INSERTO EN EL CIRCUITO DE ALIMENTACION. EXISTEN DOS RELES DE HABILITACION EN EL SEGUNDO DE LOS CUALES SE DERIVA EN LA LINEA DE ALIMENTACION ABAJO DEL CONTACTO DE INTERCEPTACION DEL PRIMER RELE. LA CORRIENTE DE LLAMADA CONTINUA, ALIMENTA UN ZUMBADOR DE CORRIENTE CONTINUA CON UN DIODO DE SERIE Y UNO EN PARALELO EN LOS QUE SE HACE CIRCULAR SELECTIVAMENTE LA CORRIENTE GRACIAS A LA ACCION DE UN RELE SENSOR EMERGIZADO POR EL CIERRE DE CUALQUIER BOTON DE LLAMADA.
ES507959A 1980-12-15 1981-12-14 Instalacion citofonica con transmision de imagen,que utiliza cuatro conductores comunes y un conductor de seleccion para cada lugar interior . Expired ES8302937A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT68903/80A IT1165528B (it) 1980-12-15 1980-12-15 Impianto citofonico con trasmissione di immagine impiegantte quattro conduttori comuni ed un conduttore di selezione per ciascun posto interno

Publications (2)

Publication Number Publication Date
ES507959A0 ES507959A0 (es) 1983-01-16
ES8302937A1 true ES8302937A1 (es) 1983-01-16

Family

ID=11310869

Family Applications (1)

Application Number Title Priority Date Filing Date
ES507959A Expired ES8302937A1 (es) 1980-12-15 1981-12-14 Instalacion citofonica con transmision de imagen,que utiliza cuatro conductores comunes y un conductor de seleccion para cada lugar interior .

Country Status (4)

Country Link
DE (1) DE3139594A1 (es)
ES (1) ES8302937A1 (es)
FR (1) FR2496377A1 (es)
IT (1) IT1165528B (es)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1160803B (it) * 1983-03-11 1987-03-11 Comelit Cie Elettronica Italia Procedimento per trattare i segnali utili in un videocitofono a quattro conduttori e circuiteria relativa

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1926314A1 (de) * 1969-03-07 1970-11-26 Heider Gmbh Schaltungsanordnung fuer kombinierte Tuersprech- und OEffneranlagen in Mehrwohnungshaeusern
DE2126180A1 (de) * 1970-09-09 1972-03-16 Barbuti O Gegensprechgerät
DE2165904B1 (de) * 1971-12-31 1973-06-28 Kathrein-Werke Kg, 8200 Rosenheim Anlage zur Mehrfachausnutzung von Signalleitungen in Gebäuden
DE2306109A1 (de) * 1972-03-23 1973-10-04 Ottorino Barbuti Gegensprechgeraet
DE2239053B2 (de) * 1972-08-08 1974-07-25 Kathrein-Werke Kg, 8200 Rosenheim Anlage zur Mehrfachausnutzung von Signalleitungen in Gebäuden, mit einer Fernseh-Gemeinschaftsantenne
FR2214213A1 (es) * 1973-01-11 1974-08-09 Diela Ste Expl Ets
DE2741160C2 (de) * 1977-09-13 1985-05-09 S. Siedle & Söhne Telefon- und Telegrafenwerke GmbH, 7743 Furtwangen Schaltungsanordnung für eine Ruf-, Türwechselsprech- und Türöffneranlage
IT1117616B (it) * 1979-02-07 1986-02-17 Bpt Spa Perfezionamenti nei videocitofani

Also Published As

Publication number Publication date
ES507959A0 (es) 1983-01-16
FR2496377A1 (fr) 1982-06-18
IT8068903A0 (it) 1980-12-15
FR2496377B1 (es) 1985-03-29
IT1165528B (it) 1987-04-22
DE3139594A1 (de) 1982-09-16

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