DE3579461D1 - DETECTOR AND ALARM SYSTEM. - Google Patents

DETECTOR AND ALARM SYSTEM.

Info

Publication number
DE3579461D1
DE3579461D1 DE8585307367T DE3579461T DE3579461D1 DE 3579461 D1 DE3579461 D1 DE 3579461D1 DE 8585307367 T DE8585307367 T DE 8585307367T DE 3579461 T DE3579461 T DE 3579461T DE 3579461 D1 DE3579461 D1 DE 3579461D1
Authority
DE
Germany
Prior art keywords
air pressure
enclosed space
alarm system
detector
changes
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 - Fee Related
Application number
DE8585307367T
Other languages
German (de)
Inventor
Harold Cowell Holden
June Holden
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.)
MICROPROTECTOR Ltd
Original Assignee
MICROPROTECTOR 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 MICROPROTECTOR Ltd filed Critical MICROPROTECTOR Ltd
Application granted granted Critical
Publication of DE3579461D1 publication Critical patent/DE3579461D1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • G08B13/1654—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems
    • G08B13/1681—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems using infrasonic detecting means, e.g. a microphone operating below the audible frequency range
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/20—Actuation by change of fluid pressure

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Burglar Alarm Systems (AREA)
  • Alarm Systems (AREA)

Abstract

An intruder alarm system in which intrusion into an enclosed space is detected as a change in the air pressure in the enclosed space uses a microcomputer to monitor the enclosed space by way of a sensor such that changes in air pressure are compared with a reference set at spaced intervals in dependence upon the ambient air pressure, whereby false alarms caused by changes in the weather are avoided.
DE8585307367T 1985-10-14 1985-10-14 DETECTOR AND ALARM SYSTEM. Expired - Fee Related DE3579461D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP85307367A EP0218765B1 (en) 1985-10-14 1985-10-14 Detection and alarm system

Publications (1)

Publication Number Publication Date
DE3579461D1 true DE3579461D1 (en) 1990-10-04

Family

ID=8194398

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8585307367T Expired - Fee Related DE3579461D1 (en) 1985-10-14 1985-10-14 DETECTOR AND ALARM SYSTEM.

Country Status (3)

Country Link
EP (1) EP0218765B1 (en)
AT (1) ATE56099T1 (en)
DE (1) DE3579461D1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO904323L (en) * 1990-10-04 1992-04-06 Nordic Technology As HUSTYVERIALARM.
WO2023235220A2 (en) * 2022-06-02 2023-12-07 Ademco Inc. Pressure data for security and hazards

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1088157A (en) * 1953-02-03 1955-03-03 Improvements to condenser microphones
US4415979A (en) * 1981-03-25 1983-11-15 Ensco, Inc. Method and apparatus for detecting the presence of an animate body in an inanimate mobile structure
US4442514A (en) * 1981-11-17 1984-04-10 The United States Of America As Represented By The Secretary Of The Air Force Security system signal processor
FR2523339A1 (en) * 1982-03-12 1983-09-16 Guglielmetti Vg Electro INFRA-SOUND VOLUMETRIC SENSOR DETECTION DEVICE AND INFRA-SOUND DETECTION METHOD
FR2560701B1 (en) * 1984-03-05 1987-04-17 Sogesec Sarl DIFFERENTIAL PRESSURE ACCESS DETECTOR
DE3412914A1 (en) * 1984-04-05 1985-10-31 base electronic gmbH, 2000 Hamburg METHOD AND DEVICE FOR SECURING CLOSED SPACES

Also Published As

Publication number Publication date
ATE56099T1 (en) 1990-09-15
EP0218765B1 (en) 1990-08-29
EP0218765A1 (en) 1987-04-22

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Legal Events

Date Code Title Description
8328 Change in the person/name/address of the agent

Free format text: DIEHL, H., DIPL.-PHYS. DR.RER.NAT., 8000 MUENCHEN GLAESER, J., DIPL.-ING., 2000 HAMBURG HILTL, E., DIPL.-CHEM. DR.RER.NAT. BURGER, E., DIPL.-ING., PAT.-ANWAELTE, 8000 MUENCHEN

8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee