CA1014647A - Intrusion alarms - Google Patents

Intrusion alarms

Info

Publication number
CA1014647A
CA1014647A CA234,819A CA234819A CA1014647A CA 1014647 A CA1014647 A CA 1014647A CA 234819 A CA234819 A CA 234819A CA 1014647 A CA1014647 A CA 1014647A
Authority
CA
Canada
Prior art keywords
intrusion alarms
alarms
intrusion
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.)
Expired
Application number
CA234,819A
Inventor
Lawrie G. Mcintosh
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.)
Contronic Controls Ltd
Original Assignee
Contronic Controls Ltd
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 Contronic Controls Ltd filed Critical Contronic Controls Ltd
Priority to CA234,819A priority Critical patent/CA1014647A/en
Application granted granted Critical
Publication of CA1014647A publication Critical patent/CA1014647A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/50—Systems of measurement, based on relative movement of the target
    • G01S15/52—Discriminating between fixed and moving objects or between objects moving at different speeds
    • G01S15/523—Discriminating between fixed and moving objects or between objects moving at different speeds for presence detection
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Computer Networks & Wireless Communication (AREA)
CA234,819A 1975-09-04 1975-09-04 Intrusion alarms Expired CA1014647A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA234,819A CA1014647A (en) 1975-09-04 1975-09-04 Intrusion alarms

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA234,819A CA1014647A (en) 1975-09-04 1975-09-04 Intrusion alarms

Publications (1)

Publication Number Publication Date
CA1014647A true CA1014647A (en) 1977-07-26

Family

ID=4103974

Family Applications (1)

Application Number Title Priority Date Filing Date
CA234,819A Expired CA1014647A (en) 1975-09-04 1975-09-04 Intrusion alarms

Country Status (1)

Country Link
CA (1) CA1014647A (en)

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