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CH614578A5 - Intercom system, in particular for use as a door intercom system - Google Patents

Intercom system, in particular for use as a door intercom system

Info

Publication number
CH614578A5
CH614578A5 CH104077A CH104077A CH614578A5 CH 614578 A5 CH614578 A5 CH 614578A5 CH 104077 A CH104077 A CH 104077A CH 104077 A CH104077 A CH 104077A CH 614578 A5 CH614578 A5 CH 614578A5
Authority
CH
Switzerland
Prior art keywords
intercom system
door
door intercom
intercom
Prior art date
Application number
CH104077A
Other languages
English (en)
Inventor
Hat Auf Nennung Verzichtet Erfinder
Original Assignee
Freibogen Anstalt
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 Freibogen Anstalt filed Critical Freibogen Anstalt
Priority to CH104077A priority Critical patent/CH614578A5/xx
Priority to IT4819577A priority patent/IT1077978B/it
Priority to ES457209A priority patent/ES457209A1/es
Priority to DE19772729469 priority patent/DE2729469C2/de
Priority to FR7720986A priority patent/FR2379205A1/fr
Publication of CH614578A5 publication Critical patent/CH614578A5/xx

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)
CH104077A 1977-01-27 1977-01-27 Intercom system, in particular for use as a door intercom system CH614578A5 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CH104077A CH614578A5 (en) 1977-01-27 1977-01-27 Intercom system, in particular for use as a door intercom system
IT4819577A IT1077978B (it) 1977-01-27 1977-02-24 Impianto interfonico
ES457209A ES457209A1 (es) 1977-01-27 1977-03-25 Instalacion interfonica.
DE19772729469 DE2729469C2 (de) 1977-01-27 1977-06-30 Gegensprechanlage
FR7720986A FR2379205A1 (fr) 1977-01-27 1977-07-07 Installation d'interphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH104077A CH614578A5 (en) 1977-01-27 1977-01-27 Intercom system, in particular for use as a door intercom system

Publications (1)

Publication Number Publication Date
CH614578A5 true CH614578A5 (en) 1979-11-30

Family

ID=4201051

Family Applications (1)

Application Number Title Priority Date Filing Date
CH104077A CH614578A5 (en) 1977-01-27 1977-01-27 Intercom system, in particular for use as a door intercom system

Country Status (5)

Country Link
CH (1) CH614578A5 (xx)
DE (1) DE2729469C2 (xx)
ES (1) ES457209A1 (xx)
FR (1) FR2379205A1 (xx)
IT (1) IT1077978B (xx)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3665116A (en) * 1969-12-19 1972-05-23 Fasco Industries Apartment house intercom system
BE775090A (fr) * 1970-11-10 1972-03-01 Citovox Ditta Installation-parlophone avec portier electrique et connexions obtenues par deux cables seulement
DE2409393B2 (de) * 1974-02-27 1976-07-29 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung fuer eine kleine bis mittlere torfernsprechanlage ohne zentrale steuereinrichtungen mit mehreren von einer torstation erreichbaren hausstationen
US3978468A (en) * 1974-11-11 1976-08-31 Robert F. Moore Intercom call signaling mechanism

Also Published As

Publication number Publication date
DE2729469C2 (de) 1986-04-24
IT1077978B (it) 1985-05-08
ES457209A1 (es) 1978-02-01
FR2379205A1 (fr) 1978-08-25
DE2729469A1 (de) 1978-08-03
FR2379205B1 (xx) 1984-05-04

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Legal Events

Date Code Title Description
PL Patent ceased
PL Patent ceased