ES396844A1 - Instalacion interfonica con cerradura electrica y conexio- nes obtenidas por solamente dos cables. - Google Patents

Instalacion interfonica con cerradura electrica y conexio- nes obtenidas por solamente dos cables.

Info

Publication number
ES396844A1
ES396844A1 ES396844A ES396844A ES396844A1 ES 396844 A1 ES396844 A1 ES 396844A1 ES 396844 A ES396844 A ES 396844A ES 396844 A ES396844 A ES 396844A ES 396844 A1 ES396844 A1 ES 396844A1
Authority
ES
Spain
Prior art keywords
relay
transistor
electric lock
interphone
cables
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
ES396844A
Other languages
English (en)
Spanish (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.)
CITOVOX
Original Assignee
CITOVOX
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 CITOVOX filed Critical CITOVOX
Publication of ES396844A1 publication Critical patent/ES396844A1/es
Expired legal-status Critical Current

Links

Classifications

    • 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)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Lock And Its Accessories (AREA)
  • Telephonic Communication Services (AREA)
ES396844A 1970-11-10 1971-11-09 Instalacion interfonica con cerradura electrica y conexio- nes obtenidas por solamente dos cables. Expired ES396844A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT3155770 1970-11-10

Publications (1)

Publication Number Publication Date
ES396844A1 true ES396844A1 (es) 1974-06-16

Family

ID=11233763

Family Applications (1)

Application Number Title Priority Date Filing Date
ES396844A Expired ES396844A1 (es) 1970-11-10 1971-11-09 Instalacion interfonica con cerradura electrica y conexio- nes obtenidas por solamente dos cables.

Country Status (4)

Country Link
BE (1) BE775090A (https=)
DE (1) DE2156517C3 (https=)
ES (1) ES396844A1 (https=)
FR (1) FR2113710A5 (https=)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH614578A5 (en) * 1977-01-27 1979-11-30 Freibogen Anstalt Intercom system, in particular for use as a door intercom system
DE2756276C3 (de) * 1977-12-16 1982-08-12 S. Siedle & Söhne Telefon- und Telegrafenwerke GmbH, 7743 Furtwangen Schaltungsanordnung für eine Ruf-, Türsprech- und Türöffneranlage
IT1110111B (it) * 1979-01-12 1985-12-23 Acet Srl Impianto citofonico a portiere elettrico a due fili,suscettibile di utilizzare un pressistente impianto a campanello,senza necessita' di ulteriori linee di alimentazione
IT1118959B (it) * 1979-04-24 1986-03-03 Urmet Spa Impianto citofonico a posto esterno con dispositivo apriporta elettrico
DE3804552C1 (en) * 1988-02-13 1989-03-02 Ritto-Werk Loh Gmbh & Co Kg, 6342 Haiger, De Door intercom system
DE3910858C2 (de) * 1989-04-04 1997-02-20 Grothe & Soehne Kg A Schaltanordnung für Türsprech- und Türöffneranlagen
DE9103782U1 (de) * 1991-03-27 1991-10-17 TELKO GmbH, 8933 Untermeitingen Zweidraht-Türsprechanlage mit Freisprechfunktion

Also Published As

Publication number Publication date
DE2156517B2 (de) 1979-05-31
DE2156517C3 (de) 1980-01-31
DE2156517A1 (de) 1972-09-21
BE775090A (fr) 1972-03-01
FR2113710A5 (https=) 1972-06-23

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