JPS5099700A - - Google Patents

Info

Publication number
JPS5099700A
JPS5099700A JP49004132A JP413274A JPS5099700A JP S5099700 A JPS5099700 A JP S5099700A JP 49004132 A JP49004132 A JP 49004132A JP 413274 A JP413274 A JP 413274A JP S5099700 A JPS5099700 A JP S5099700A
Authority
JP
Japan
Prior art keywords
alarm signal
coaxial cables
receiver
receivers
aerial
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
JP49004132A
Other languages
Japanese (ja)
Other versions
JPS5612916B2 (en
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 filed Critical
Priority to JP744132A priority Critical patent/JPS5612916B2/ja
Priority to FI3567/74A priority patent/FI356774A7/fi
Priority to FR7442715A priority patent/FR2256484A1/en
Publication of JPS5099700A publication Critical patent/JPS5099700A/ja
Publication of JPS5612916B2 publication Critical patent/JPS5612916B2/ja
Expired 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)

Abstract

A common receiving aerial (1) sends received signals to a number of receivers (5) via divider units (3). The aerial (1), divider (3) and the respective receivers are connected by coaxial cables (6). The alarm signal generators (8) have their own particular resistors and frequency oscillators which are connected to the coaxial cables near to their respective receivers. A common alarm receiver (7) is connected to the coaxial cables near to an alarm signal reception point, and this receiver is composed of an electrical circuit indicating an alarm signal initiation point, corresponding to the particular resistance and frequency of the alarm signal generator.
JP744132A 1973-12-29 1973-12-29 Expired JPS5612916B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP744132A JPS5612916B2 (en) 1973-12-29 1973-12-29
FI3567/74A FI356774A7 (en) 1973-12-29 1974-12-11
FR7442715A FR2256484A1 (en) 1973-12-29 1974-12-24 Multiple alarm system with common receiver - has coaxial cables and different threshold alarms

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
JPS5099700A true JPS5099700A (en) 1975-08-07
JPS5612916B2 JPS5612916B2 (en) 1981-03-25

Family

ID=11576241

Family Applications (1)

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

Country Status (3)

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

Cited By (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
JPS56137289U (en) * 1980-03-14 1981-10-17
JPS5836487U (en) * 1981-09-03 1983-03-09 ホーチキ株式会社 Fire alarm system using a private telephone
JPS60164300U (en) * 1985-03-01 1985-10-31 八木アンテナ株式会社 Alarm transmission display device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998049838A2 (en) * 1997-04-28 1998-11-05 Jackson Research, Inc. Monitored video camera system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4855697A (en) * 1971-11-12 1973-08-04
JPS4856099A (en) * 1971-11-15 1973-08-07
JPS4877792A (en) * 1972-01-20 1973-10-19
JPS48113382U (en) * 1972-04-01 1973-12-25

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4855697A (en) * 1971-11-12 1973-08-04
JPS4856099A (en) * 1971-11-15 1973-08-07
JPS4877792A (en) * 1972-01-20 1973-10-19
JPS48113382U (en) * 1972-04-01 1973-12-25

Cited By (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
JPS56137289U (en) * 1980-03-14 1981-10-17
JPS5836487U (en) * 1981-09-03 1983-03-09 ホーチキ株式会社 Fire alarm system using a private telephone
JPS60164300U (en) * 1985-03-01 1985-10-31 八木アンテナ株式会社 Alarm transmission display device

Also Published As

Publication number Publication date
FR2256484A1 (en) 1975-07-25
JPS5612916B2 (en) 1981-03-25
FI356774A7 (en) 1975-06-30

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