SE7809541L - COUPLING DEVICE FOR A CALL, DOOR PHONE AND DOOR OPENING SYSTEM - Google Patents

COUPLING DEVICE FOR A CALL, DOOR PHONE AND DOOR OPENING SYSTEM

Info

Publication number
SE7809541L
SE7809541L SE7809541A SE7809541A SE7809541L SE 7809541 L SE7809541 L SE 7809541L SE 7809541 A SE7809541 A SE 7809541A SE 7809541 A SE7809541 A SE 7809541A SE 7809541 L SE7809541 L SE 7809541L
Authority
SE
Sweden
Prior art keywords
door
call
coupling device
opening system
door opening
Prior art date
Application number
SE7809541A
Other languages
Swedish (sv)
Other versions
SE427232B (en
Inventor
G Schlaps
Original Assignee
Siedle & Soehne S
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 Siedle & Soehne S filed Critical Siedle & Soehne S
Publication of SE7809541L publication Critical patent/SE7809541L/en
Publication of SE427232B publication Critical patent/SE427232B/en

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)
SE7809541A 1977-09-13 1978-09-11 CLUTCH DEVICE FOR A CALL, PORT PHONE AND PORT PLACING PLANT SE427232B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2741160A DE2741160C2 (en) 1977-09-13 1977-09-13 Circuit arrangement for a call, intercom and door opener system

Publications (2)

Publication Number Publication Date
SE7809541L true SE7809541L (en) 1979-03-14
SE427232B SE427232B (en) 1983-03-14

Family

ID=6018834

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7809541A SE427232B (en) 1977-09-13 1978-09-11 CLUTCH DEVICE FOR A CALL, PORT PHONE AND PORT PLACING PLANT

Country Status (6)

Country Link
BE (1) BE870388R (en)
CH (1) CH632623A5 (en)
DE (1) DE2741160C2 (en)
FR (1) FR2402978A2 (en)
NL (1) NL7808822A (en)
SE (1) SE427232B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1165528B (en) * 1980-12-15 1987-04-22 Urmet Spa DOOR PHONE SYSTEM WITH IMAGE TRANSMISSION USING FOUR COMMON CONDUCTORS AND A SELECTION CONDUCTOR FOR EACH INTERNAL STATION
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

Also Published As

Publication number Publication date
DE2741160C2 (en) 1985-05-09
CH632623A5 (en) 1982-10-15
FR2402978A2 (en) 1979-04-06
NL7808822A (en) 1979-03-15
BE870388R (en) 1979-01-02
DE2741160A1 (en) 1979-04-12
SE427232B (en) 1983-03-14

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