BE498891A - - Google Patents

Info

Publication number
BE498891A
BE498891A BE498891DA BE498891A BE 498891 A BE498891 A BE 498891A BE 498891D A BE498891D A BE 498891DA BE 498891 A BE498891 A BE 498891A
Authority
BE
Belgium
Application number
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.)
Publication of BE498891A publication Critical patent/BE498891A/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
    • H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Alarm Systems (AREA)
BE498891D 1949-04-20 BE498891A (en])

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP40268A DE838912C (de) 1949-04-20 1949-04-20 Notrufeinrichtung als Zusatzeinrichtung fuer Fernsprechanlagen

Publications (1)

Publication Number Publication Date
BE498891A true BE498891A (en])

Family

ID=7377039

Family Applications (1)

Application Number Title Priority Date Filing Date
BE498891D BE498891A (en]) 1949-04-20

Country Status (2)

Country Link
BE (1) BE498891A (en])
DE (1) DE838912C (en])

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1018934B (de) * 1954-04-07 1957-11-07 Teletransmission Automatique S Alarmeinrichtung unter Verwendung einer selbsttaetigen Fernsprechvermittlungsanlage
DE1109744B (de) * 1958-08-04 1961-06-29 Telerapid Telefon Ges Huppertz Notrufuebertragungseinrichtung fuer Teilnehmersprechstellen eines oeffentlichen Fernsprechnetzes
DE1112552B (de) * 1960-01-18 1961-08-10 German Vogliano Notrufeinrichtung bei Muenzfernsprechern

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE469765C (de) * 1926-08-13 1928-12-19 Siemens & Halske Akt Ges Schaltungsanordnung zur Abgabe von Alarmrufen durch besondere Alarmgebeeinrichtungenueber die Anschlussleitungen und Verbindungseinrichtungen einer Fernsprechanlage mit Waehlerbetrieb
DE510580C (de) * 1926-09-22 1930-10-20 Siemens & Halske Akt Ges Schaltungsanordnung zur Abgabe von Alarmrufen in Fernsprechanlagen mit Waehlerbetrieb

Also Published As

Publication number Publication date
DE838912C (de) 1954-07-26

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