GB2124363B - Intruder detector - Google Patents

Intruder detector

Info

Publication number
GB2124363B
GB2124363B GB08221644A GB8221644A GB2124363B GB 2124363 B GB2124363 B GB 2124363B GB 08221644 A GB08221644 A GB 08221644A GB 8221644 A GB8221644 A GB 8221644A GB 2124363 B GB2124363 B GB 2124363B
Authority
GB
United Kingdom
Prior art keywords
intruder detector
intruder
detector
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
GB08221644A
Other versions
GB2124363A (en
Inventor
John Philip Chambrie Vigurs
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.)
I R SYSTEMS Ltd
Original Assignee
I R SYSTEMS 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 I R SYSTEMS Ltd filed Critical I R SYSTEMS Ltd
Priority to GB08221644A priority Critical patent/GB2124363B/en
Publication of GB2124363A publication Critical patent/GB2124363A/en
Application granted granted Critical
Publication of GB2124363B publication Critical patent/GB2124363B/en
Expired 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
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/19—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using infrared-radiation detection systems
    • G08B13/193—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using infrared-radiation detection systems using focusing means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
GB08221644A 1982-07-27 1982-07-27 Intruder detector Expired GB2124363B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08221644A GB2124363B (en) 1982-07-27 1982-07-27 Intruder detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08221644A GB2124363B (en) 1982-07-27 1982-07-27 Intruder detector

Publications (2)

Publication Number Publication Date
GB2124363A GB2124363A (en) 1984-02-15
GB2124363B true GB2124363B (en) 1985-12-18

Family

ID=10531928

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08221644A Expired GB2124363B (en) 1982-07-27 1982-07-27 Intruder detector

Country Status (1)

Country Link
GB (1) GB2124363B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2173013A (en) * 1985-03-29 1986-10-01 Philips Electronic Associated Arrays of lenses
DE3674957D1 (en) * 1985-07-17 1990-11-22 Racal Guardall Scotland PASSIVE INFRARED SENSORS.
GB8711609D0 (en) * 1987-05-16 1987-06-24 Wild G Optical detector
CA2157237A1 (en) * 1995-08-30 1997-03-01 John W. Patchell Thermal emitted radiation detecting device
US6753766B2 (en) 2001-01-15 2004-06-22 1138037 Ontario Ltd. (“Alirt”) Detecting device and method of using same
US7634341B2 (en) 2001-03-07 2009-12-15 1138037 Ontario Ltd. (“Alirt”) Detecting device and method of using same

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4275303A (en) * 1979-11-13 1981-06-23 Arrowhead Enterprises, Inc. Passive infrared intrusion detection system

Also Published As

Publication number Publication date
GB2124363A (en) 1984-02-15

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee