IT1012153B - Impianto di allarme con dispositivi segnalatori d allarme collegati in parallelo - Google Patents

Impianto di allarme con dispositivi segnalatori d allarme collegati in parallelo

Info

Publication number
IT1012153B
IT1012153B IT2243074A IT2243074A IT1012153B IT 1012153 B IT1012153 B IT 1012153B IT 2243074 A IT2243074 A IT 2243074A IT 2243074 A IT2243074 A IT 2243074A IT 1012153 B IT1012153 B IT 1012153B
Authority
IT
Italy
Prior art keywords
alarm
parallel
devices connected
signal devices
alarm signal
Prior art date
Application number
IT2243074A
Other languages
English (en)
Original Assignee
Worl A
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 Worl A filed Critical Worl A
Application granted granted Critical
Publication of IT1012153B publication Critical patent/IT1012153B/it

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL 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
    • G08B25/04—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 a single signalling line, e.g. in a closed loop
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/16—Actuation by interference with mechanical vibrations in air or other fluid
    • G08B13/1654—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems
    • G08B13/1672—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems using sonic detecting means, e.g. a microphone operating in the audio frequency range

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Alarm Systems (AREA)
IT2243074A 1973-07-11 1974-05-08 Impianto di allarme con dispositivi segnalatori d allarme collegati in parallelo IT1012153B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2335316A DE2335316B1 (de) 1973-07-11 1973-07-11 Alarmanlage mit parallelgeschalteten Alarmmeldern

Publications (1)

Publication Number Publication Date
IT1012153B true IT1012153B (it) 1977-03-10

Family

ID=5886594

Family Applications (1)

Application Number Title Priority Date Filing Date
IT2243074A IT1012153B (it) 1973-07-11 1974-05-08 Impianto di allarme con dispositivi segnalatori d allarme collegati in parallelo

Country Status (4)

Country Link
CH (1) CH577724A5 (it)
DE (1) DE2335316B1 (it)
FR (1) FR2237256A1 (it)
IT (1) IT1012153B (it)

Also Published As

Publication number Publication date
DE2335316B1 (de) 1974-10-10
FR2237256A1 (it) 1975-02-07
CH577724A5 (it) 1976-07-15

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