FR2256484A1 - Multiple alarm system with common receiver - has coaxial cables and different threshold alarms - Google Patents

Multiple alarm system with common receiver - has coaxial cables and different threshold alarms

Info

Publication number
FR2256484A1
FR2256484A1 FR7442715A FR7442715A FR2256484A1 FR 2256484 A1 FR2256484 A1 FR 2256484A1 FR 7442715 A FR7442715 A FR 7442715A FR 7442715 A FR7442715 A FR 7442715A FR 2256484 A1 FR2256484 A1 FR 2256484A1
Authority
FR
France
Prior art keywords
coaxial cables
alarm signal
alarm system
different threshold
common receiver
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.)
Withdrawn
Application number
FR7442715A
Other languages
English (en)
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.)
Hochiki Corp
Original Assignee
Hochiki Corp
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 Hochiki Corp filed Critical Hochiki Corp
Publication of FR2256484A1 publication Critical patent/FR2256484A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/08—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using communication transmission lines
    • G08B25/085—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using communication transmission lines using central distribution transmission lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable
    • H04N7/102—Circuits therefor, e.g. noise reducers, equalisers, amplifiers
    • H04N7/104—Switchers or splitters

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Circuits Of Receivers In General (AREA)
  • Closed-Circuit Television Systems (AREA)
  • Alarm Systems (AREA)
FR7442715A 1973-12-29 1974-12-24 Multiple alarm system with common receiver - has coaxial cables and different threshold alarms Withdrawn FR2256484A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP744132A JPS5612916B2 (enrdf_load_stackoverflow) 1973-12-29 1973-12-29

Publications (1)

Publication Number Publication Date
FR2256484A1 true FR2256484A1 (en) 1975-07-25

Family

ID=11576241

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7442715A Withdrawn FR2256484A1 (en) 1973-12-29 1974-12-24 Multiple alarm system with common receiver - has coaxial cables and different threshold alarms

Country Status (3)

Country Link
JP (1) JPS5612916B2 (enrdf_load_stackoverflow)
FI (1) FI356774A7 (enrdf_load_stackoverflow)
FR (1) FR2256484A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998049838A3 (en) * 1997-04-28 1999-01-28 Jackson Research Inc Monitored video camera system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5654595A (en) * 1979-10-09 1981-05-14 Yagi Antenna Alarm transmission*indicator
JPS6319919Y2 (enrdf_load_stackoverflow) * 1980-03-14 1988-06-02
JPS5836487U (ja) * 1981-09-03 1983-03-09 ホーチキ株式会社 構内電話を利用した火災報知機
JPS60164300U (ja) * 1985-03-01 1985-10-31 八木アンテナ株式会社 警報伝送表示装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5213719B2 (enrdf_load_stackoverflow) * 1971-11-12 1977-04-16
JPS4856099A (enrdf_load_stackoverflow) * 1971-11-15 1973-08-07
JPS5229917B2 (enrdf_load_stackoverflow) * 1972-01-20 1977-08-04
JPS5411822Y2 (enrdf_load_stackoverflow) * 1972-04-01 1979-05-25

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998049838A3 (en) * 1997-04-28 1999-01-28 Jackson Research Inc Monitored video camera system

Also Published As

Publication number Publication date
JPS5612916B2 (enrdf_load_stackoverflow) 1981-03-25
FI356774A7 (enrdf_load_stackoverflow) 1975-06-30
JPS5099700A (enrdf_load_stackoverflow) 1975-08-07

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Legal Events

Date Code Title Description
ST Notification of lapse