FR1113111A - Electric alarm system - Google Patents

Electric alarm system

Info

Publication number
FR1113111A
FR1113111A FR1113111DA FR1113111A FR 1113111 A FR1113111 A FR 1113111A FR 1113111D A FR1113111D A FR 1113111DA FR 1113111 A FR1113111 A FR 1113111A
Authority
FR
France
Prior art keywords
alarm system
electric alarm
electric
alarm
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
Other languages
French (fr)
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
Application granted granted Critical
Publication of FR1113111A publication Critical patent/FR1113111A/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)
  • Monitoring And Testing Of Exchanges (AREA)
  • Alarm Systems (AREA)
FR1113111D 1953-09-19 1954-09-18 Electric alarm system Expired FR1113111A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
FR1113111A true FR1113111A (en) 1956-03-23

Family

ID=8152739

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1113111D Expired FR1113111A (en) 1953-09-19 1954-09-18 Electric alarm system

Country Status (5)

Country Link
BE (1) BE531937A (en)
DE (1) DE1018931B (en)
FR (1) FR1113111A (en)
GB (1) GB776078A (en)
NL (2) NL88907C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1013706B (en) * 1956-01-14 1957-08-14 Telefonbau & Normalzeit Gmbh Circuit arrangement for the transmission of messages over discussed telephone connection lines

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1233024B (en) * 1963-05-03 1967-01-26 Siemens Ag Device for the transmission of signals over a telephone network
DE1265793B (en) * 1966-10-22 1968-04-11 August Woerl Alarm system for the automatic transmission of a message over a telephone line

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE661785C (en) * 1927-07-20 1938-06-28 Siemens & Halske Akt Ges Circuit arrangement for the transmission of regular incremental currents for clocks and alarm messages
DE655938C (en) * 1927-12-20 1938-01-31 Siemens & Halske Akt Ges Circuit arrangement for communication over telephone lines
DE730913C (en) * 1941-04-30 1943-01-28 Siemens Ag Signaling system for the transmission of messages of various importance and for the establishment of telephone connections via loop lines
DE805287C (en) * 1950-04-02 1951-05-15 Telefonbau & Normalzeit Gmbh Circuit arrangement for the transmission of messages over discussed telephone lines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1013706B (en) * 1956-01-14 1957-08-14 Telefonbau & Normalzeit Gmbh Circuit arrangement for the transmission of messages over discussed telephone connection lines

Also Published As

Publication number Publication date
NL88907C (en)
BE531937A (en)
NL190903A (en)
DE1018931B (en) 1957-11-07
GB776078A (en) 1957-06-05

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