GB2010642B - Circuit arrangements for a calling door speaking and door opening installation - Google Patents

Circuit arrangements for a calling door speaking and door opening installation

Info

Publication number
GB2010642B
GB2010642B GB7846655A GB7846655A GB2010642B GB 2010642 B GB2010642 B GB 2010642B GB 7846655 A GB7846655 A GB 7846655A GB 7846655 A GB7846655 A GB 7846655A GB 2010642 B GB2010642 B GB 2010642B
Authority
GB
United Kingdom
Prior art keywords
door
speaking
calling
circuit arrangements
opening installation
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
GB7846655A
Other versions
GB2010642A (en
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 GB2010642A publication Critical patent/GB2010642A/en
Application granted granted Critical
Publication of GB2010642B publication Critical patent/GB2010642B/en
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)
GB7846655A 1977-12-16 1978-11-30 Circuit arrangements for a calling door speaking and door opening installation Expired GB2010642B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2756276A DE2756276C3 (en) 1977-12-16 1977-12-16 Circuit arrangement for a call, door intercom and door opener system

Publications (2)

Publication Number Publication Date
GB2010642A GB2010642A (en) 1979-06-27
GB2010642B true GB2010642B (en) 1982-01-20

Family

ID=6026379

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7846655A Expired GB2010642B (en) 1977-12-16 1978-11-30 Circuit arrangements for a calling door speaking and door opening installation

Country Status (14)

Country Link
BE (1) BE872780A (en)
DE (1) DE2756276C3 (en)
DK (1) DK535478A (en)
ES (1) ES475995A1 (en)
FI (1) FI783834A (en)
FR (1) FR2412126B3 (en)
GB (1) GB2010642B (en)
IS (1) IS2466A7 (en)
IT (1) IT1101562B (en)
LU (1) LU80652A1 (en)
NL (1) NL7812007A (en)
NO (1) NO784143L (en)
PT (1) PT68875A (en)
SE (1) SE7812671L (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1110111B (en) * 1979-01-12 1985-12-23 Acet Srl TWO-WIRE ELECTRIC DOOR ENTRY SYSTEM, SUSCEPTABLE TO USE A PRESSISTING DOOR BELL SYSTEM, WITHOUT THE NEED FOR ADDITIONAL POWER LINES
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
FR2113710A5 (en) * 1970-11-10 1972-06-23 Citovox

Also Published As

Publication number Publication date
FI783834A (en) 1979-06-17
IT7830842A0 (en) 1978-12-14
BE872780A (en) 1979-03-30
ES475995A1 (en) 1979-04-16
GB2010642A (en) 1979-06-27
FR2412126B3 (en) 1981-10-16
PT68875A (en) 1979-01-01
IS2466A7 (en) 1978-11-24
LU80652A1 (en) 1979-04-13
DK535478A (en) 1979-06-17
NL7812007A (en) 1979-06-19
DE2756276B2 (en) 1979-10-11
SE7812671L (en) 1979-06-17
NO784143L (en) 1979-06-19
DE2756276C3 (en) 1982-08-12
IT1101562B (en) 1985-10-07
FR2412126A1 (en) 1979-07-13
DE2756276A1 (en) 1979-06-21

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee