GB776078A - Electric alarm system - Google Patents

Electric alarm system

Info

Publication number
GB776078A
GB776078A GB27182/54A GB2718254A GB776078A GB 776078 A GB776078 A GB 776078A GB 27182/54 A GB27182/54 A GB 27182/54A GB 2718254 A GB2718254 A GB 2718254A GB 776078 A GB776078 A GB 776078A
Authority
GB
United Kingdom
Prior art keywords
relay
alarm
line
plug
signal
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
GB27182/54A
Other languages
English (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.)
Danske Securitas AS
Original Assignee
Danske Securitas AS
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 Danske Securitas AS filed Critical Danske Securitas AS
Publication of GB776078A publication Critical patent/GB776078A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/08—Indicating faults in circuits or apparatus
    • H04M3/10—Providing fault- or trouble-signals
    • 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)
  • Monitoring And Testing Of Exchanges (AREA)
GB27182/54A 1953-09-19 1954-09-20 Electric alarm system Expired GB776078A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK776078X 1953-09-19

Publications (1)

Publication Number Publication Date
GB776078A true GB776078A (en) 1957-06-05

Family

ID=8152739

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27182/54A Expired GB776078A (en) 1953-09-19 1954-09-20 Electric alarm system

Country Status (5)

Country Link
BE (1) BE531937A (enrdf_load_stackoverflow)
DE (1) DE1018931B (enrdf_load_stackoverflow)
FR (1) FR1113111A (enrdf_load_stackoverflow)
GB (1) GB776078A (enrdf_load_stackoverflow)
NL (2) NL190903A (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1013706B (de) * 1956-01-14 1957-08-14 Telefonbau & Normalzeit Gmbh Schaltungsanordnung zur UEbertragung von Meldungen ueber besprochene Fernsprechanschlussleitungen
DE1090271B (de) * 1959-10-12 1960-10-06 Hagenuk Neufeldt Kuhnke Gmbh Selbsttaetige Einrichtung zur telefonischen UEbermittlung von Messwerten verschiedenartiger Messgroessen an Fernsprechteilnehmer
DE1233024B (de) * 1963-05-03 1967-01-26 Siemens Ag Einrichtung zur UEbertragung von Signalen ueber ein Fernsprechnetz
DE1265793B (de) * 1966-10-22 1968-04-11 August Woerl Alarmanlage zur selbsttaetigen UEbertragung einer Nachricht ueber eine Fernsprechleitung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE661785C (de) * 1927-07-20 1938-06-28 Siemens & Halske Akt Ges Schaltungsanordnung zur UEbertragung von regelmaessigen Fortschaltestromstoessen fuer Uhren und von Alarmmeldungen
DE655938C (de) * 1927-12-20 1938-01-31 Siemens & Halske Akt Ges Schaltungsanordnung fuer Nachrichtenuebertragung ueber Fernsprechleitungen
DE730913C (de) * 1941-04-30 1943-01-28 Siemens Ag Meldeanlage fuer die UEbermittlung von Meldungen verschiedener Bedeutung und fuer die Herstellung von Fernsprechverbindungen ueber Schleifenleitungen
DE805287C (de) * 1950-04-02 1951-05-15 Telefonbau & Normalzeit Gmbh Schaltungsanordnung zur UEbertragung von Meldungen ueber besprochene Fernsprechleitungen

Also Published As

Publication number Publication date
NL190903A (enrdf_load_stackoverflow)
BE531937A (enrdf_load_stackoverflow)
NL88907C (enrdf_load_stackoverflow)
DE1018931B (de) 1957-11-07
FR1113111A (fr) 1956-03-23

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