ITMI922061A0 - Impianto citofonico con una stazione da porta e almeno un posto telefonico interno - Google Patents

Impianto citofonico con una stazione da porta e almeno un posto telefonico interno

Info

Publication number
ITMI922061A0
ITMI922061A0 IT92MI2061A ITMI922061A ITMI922061A0 IT MI922061 A0 ITMI922061 A0 IT MI922061A0 IT 92MI2061 A IT92MI2061 A IT 92MI2061A IT MI922061 A ITMI922061 A IT MI922061A IT MI922061 A0 ITMI922061 A0 IT MI922061A0
Authority
IT
Italy
Prior art keywords
station
intercom system
internal telephone
door
telephone station
Prior art date
Application number
IT92MI2061A
Other languages
English (en)
Inventor
Heinz Achenbach
Original Assignee
Ritto Werk
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 Ritto Werk filed Critical Ritto Werk
Publication of ITMI922061A0 publication Critical patent/ITMI922061A0/it
Publication of ITMI922061A1 publication Critical patent/ITMI922061A1/it
Application granted granted Critical
Publication of IT1256371B publication Critical patent/IT1256371B/it

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)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
ITMI922061A 1991-09-11 1992-09-04 Impianto citofonico con una stazione da porta e almeno un posto telefonico interno IT1256371B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4130101A DE4130101C1 (en) 1991-09-11 1991-09-11 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

Publications (3)

Publication Number Publication Date
ITMI922061A0 true ITMI922061A0 (it) 1992-09-04
ITMI922061A1 ITMI922061A1 (it) 1994-03-04
IT1256371B IT1256371B (it) 1995-12-04

Family

ID=6440292

Family Applications (1)

Application Number Title Priority Date Filing Date
ITMI922061A IT1256371B (it) 1991-09-11 1992-09-04 Impianto citofonico con una stazione da porta e almeno un posto telefonico interno

Country Status (4)

Country Link
DE (1) DE4130101C1 (it)
ES (1) ES2048116B1 (it)
FR (1) FR2681208B1 (it)
IT (1) IT1256371B (it)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4333455C2 (de) * 1993-09-30 1996-09-12 Grothe & Soehne Gmbh & Co Kg A Haussignal- und -türöffneranlage
DE19643125C2 (de) * 1996-10-18 2003-04-10 Siedle & Soehne S Türsprechsystem

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2741160C2 (de) * 1977-09-13 1985-05-09 S. Siedle & Söhne Telefon- und Telegrafenwerke GmbH, 7743 Furtwangen Schaltungsanordnung für eine Ruf-, Türwechselsprech- und Türöffneranlage
DE2756276C3 (de) * 1977-12-16 1982-08-12 S. Siedle & Söhne Telefon- und Telegrafenwerke GmbH, 7743 Furtwangen Schaltungsanordnung für eine Ruf-, Türsprech- und Türöffneranlage
ES8403681A1 (es) * 1983-05-04 1984-04-16 Gorrochategui Grajirena Javier Sistema de secreto para porteros automaticos.
US4658095A (en) * 1985-04-15 1987-04-14 Elias Santiago Building intercom system
ES2007618A6 (es) * 1987-06-17 1989-07-01 Fermax Electronica Perfeccionamientos en sistemas de porteros electronicos.
ES2011143A6 (es) * 1988-10-10 1989-12-16 Grajirena Javier Gorrochategui Sistema de comunicacion entre un punto y unos secundarios, tal como un portero automatico.
GB2225195B (en) * 1988-11-19 1993-08-11 Matsushita Electric Works Ltd Two-wire television interphone system
DE4015466C1 (en) * 1990-05-14 1991-05-16 S. Siedle & Soehne Telefon- Und Telegrafenwerke Stiftung & Co, 7743 Furtwangen, De Entry phone esp. for apartment block - has individual and common leads with mains supply unit switchable into latter

Also Published As

Publication number Publication date
ITMI922061A1 (it) 1994-03-04
ES2048116R (it) 1996-06-16
ES2048116A2 (es) 1994-03-01
IT1256371B (it) 1995-12-04
FR2681208A1 (fr) 1993-03-12
FR2681208B1 (fr) 1994-12-30
ES2048116B1 (es) 1997-02-16
DE4130101C1 (en) 1993-02-04

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Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19970926