FR2256483A1 - Surveillance alarm system for office or apartment blocks - using TV receivers connected to communal antenna system - Google Patents

Surveillance alarm system for office or apartment blocks - using TV receivers connected to communal antenna system

Info

Publication number
FR2256483A1
FR2256483A1 FR7442714A FR7442714A FR2256483A1 FR 2256483 A1 FR2256483 A1 FR 2256483A1 FR 7442714 A FR7442714 A FR 7442714A FR 7442714 A FR7442714 A FR 7442714A FR 2256483 A1 FR2256483 A1 FR 2256483A1
Authority
FR
France
Prior art keywords
receiver
office
receivers connected
surveillance
communal
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.)
Granted
Application number
FR7442714A
Other languages
English (en)
French (fr)
Other versions
FR2256483B1 (enrdf_load_stackoverflow
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 FR2256483A1 publication Critical patent/FR2256483A1/fr
Application granted granted Critical
Publication of FR2256483B1 publication Critical patent/FR2256483B1/fr
Granted 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)
  • Alarm Systems (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
FR7442714A 1973-12-29 1974-12-24 Surveillance alarm system for office or apartment blocks - using TV receivers connected to communal antenna system Granted FR2256483A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP744131A JPS5539034B2 (enrdf_load_stackoverflow) 1973-12-29 1973-12-29

Publications (2)

Publication Number Publication Date
FR2256483A1 true FR2256483A1 (en) 1975-07-25
FR2256483B1 FR2256483B1 (enrdf_load_stackoverflow) 1980-07-04

Family

ID=11576214

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7442714A Granted FR2256483A1 (en) 1973-12-29 1974-12-24 Surveillance alarm system for office or apartment blocks - using TV receivers connected to communal antenna system

Country Status (4)

Country Link
JP (1) JPS5539034B2 (enrdf_load_stackoverflow)
DE (1) DE2460327A1 (enrdf_load_stackoverflow)
FI (1) FI356674A7 (enrdf_load_stackoverflow)
FR (1) FR2256483A1 (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6319919Y2 (enrdf_load_stackoverflow) * 1980-03-14 1988-06-02
JPS5986767U (ja) * 1982-12-01 1984-06-12 八木アンテナ株式会社 共聴用分配器

Family Cites Families (1)

* 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

Also Published As

Publication number Publication date
DE2460327A1 (de) 1975-07-03
FR2256483B1 (enrdf_load_stackoverflow) 1980-07-04
JPS5539034B2 (enrdf_load_stackoverflow) 1980-10-08
JPS5099699A (enrdf_load_stackoverflow) 1975-08-07
FI356674A7 (enrdf_load_stackoverflow) 1975-06-30

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Legal Events

Date Code Title Description
ST Notification of lapse