ES475995A1 - Una disposicion de circuito para una instalacion de llamada,conversacion con y ante la puerta y de apertura de una puer-ta. - Google Patents

Una disposicion de circuito para una instalacion de llamada,conversacion con y ante la puerta y de apertura de una puer-ta.

Info

Publication number
ES475995A1
ES475995A1 ES475995A ES475995A ES475995A1 ES 475995 A1 ES475995 A1 ES 475995A1 ES 475995 A ES475995 A ES 475995A ES 475995 A ES475995 A ES 475995A ES 475995 A1 ES475995 A1 ES 475995A1
Authority
ES
Spain
Prior art keywords
speaking
door
microphone
button
loudspeaker
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
ES475995A
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.)
S Siedle and Sohne
Original Assignee
S Siedle and Sohne
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 S Siedle and Sohne filed Critical S Siedle and Sohne
Publication of ES475995A1 publication Critical patent/ES475995A1/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)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
ES475995A 1977-12-16 1978-12-14 Una disposicion de circuito para una instalacion de llamada,conversacion con y ante la puerta y de apertura de una puer-ta. Expired ES475995A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2756276A DE2756276C3 (de) 1977-12-16 1977-12-16 Schaltungsanordnung für eine Ruf-, Türsprech- und Türöffneranlage

Publications (1)

Publication Number Publication Date
ES475995A1 true ES475995A1 (es) 1979-04-16

Family

ID=6026379

Family Applications (1)

Application Number Title Priority Date Filing Date
ES475995A Expired ES475995A1 (es) 1977-12-16 1978-12-14 Una disposicion de circuito para una instalacion de llamada,conversacion con y ante la puerta y de apertura de una puer-ta.

Country Status (14)

Country Link
BE (1) BE872780A (enExample)
DE (1) DE2756276C3 (enExample)
DK (1) DK535478A (enExample)
ES (1) ES475995A1 (enExample)
FI (1) FI783834A7 (enExample)
FR (1) FR2412126B3 (enExample)
GB (1) GB2010642B (enExample)
IS (1) IS2466A7 (enExample)
IT (1) IT1101562B (enExample)
LU (1) LU80652A1 (enExample)
NL (1) NL7812007A (enExample)
NO (1) NO784143L (enExample)
PT (1) PT68875A (enExample)
SE (1) SE7812671L (enExample)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE4130101C1 (en) * 1991-09-11 1993-02-04 Ritto-Werk Loh Gmbh & Co Kg, 6342 Haiger, De Door intercom with door-opening button - centrally generates call signal and feeds to individual internal intercoms using circuit including two series-connected Zener diodes and parallel decoupling diode

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE775090A (fr) * 1970-11-10 1972-03-01 Citovox Ditta Installation-parlophone avec portier electrique et connexions obtenues par deux cables seulement

Also Published As

Publication number Publication date
DE2756276C3 (de) 1982-08-12
LU80652A1 (de) 1979-04-13
FR2412126A1 (enExample) 1979-07-13
PT68875A (pt) 1979-01-01
GB2010642B (en) 1982-01-20
IT1101562B (it) 1985-10-07
FR2412126B3 (enExample) 1981-10-16
GB2010642A (en) 1979-06-27
IS2466A7 (is) 1978-11-24
FI783834A7 (fi) 1979-06-17
BE872780A (nl) 1979-03-30
NL7812007A (nl) 1979-06-19
DE2756276A1 (de) 1979-06-21
IT7830842A0 (it) 1978-12-14
DK535478A (da) 1979-06-17
NO784143L (no) 1979-06-19
SE7812671L (sv) 1979-06-17
DE2756276B2 (de) 1979-10-11

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