BE804955A - Dispositif d'alarme a ultrasons - Google Patents

Dispositif d'alarme a ultrasons

Info

Publication number
BE804955A
BE804955A BE135737A BE135737A BE804955A BE 804955 A BE804955 A BE 804955A BE 135737 A BE135737 A BE 135737A BE 135737 A BE135737 A BE 135737A BE 804955 A BE804955 A BE 804955A
Authority
BE
Belgium
Prior art keywords
alarm device
ultrasonic alarm
ultrasonic
alarm
Prior art date
Application number
BE135737A
Other languages
English (en)
Original Assignee
Moss Royston A L
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 Moss Royston A L filed Critical Moss Royston A L
Priority to BE135737A priority Critical patent/BE804955A/fr
Publication of BE804955A publication Critical patent/BE804955A/fr

Links

Classifications

    • 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
    • G08B13/1609—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems
    • G08B13/1618—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems using ultrasonic detection means
    • G08B13/1627—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems using ultrasonic detection means using Doppler shift detection circuits

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
BE135737A 1973-09-17 1973-09-17 Dispositif d'alarme a ultrasons BE804955A (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BE135737A BE804955A (fr) 1973-09-17 1973-09-17 Dispositif d'alarme a ultrasons

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE135737A BE804955A (fr) 1973-09-17 1973-09-17 Dispositif d'alarme a ultrasons

Publications (1)

Publication Number Publication Date
BE804955A true BE804955A (fr) 1974-01-16

Family

ID=3842217

Family Applications (1)

Application Number Title Priority Date Filing Date
BE135737A BE804955A (fr) 1973-09-17 1973-09-17 Dispositif d'alarme a ultrasons

Country Status (1)

Country Link
BE (1) BE804955A (fr)

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