GB1605411A8 - Intruder detection apparatus - Google Patents

Intruder detection apparatus

Info

Publication number
GB1605411A8
GB1605411A8 GB2939872A GB2939872A GB1605411A8 GB 1605411 A8 GB1605411 A8 GB 1605411A8 GB 2939872 A GB2939872 A GB 2939872A GB 2939872 A GB2939872 A GB 2939872A GB 1605411 A8 GB1605411 A8 GB 1605411A8
Authority
GB
United Kingdom
Prior art keywords
detection apparatus
intruder detection
intruder
detection
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.)
Active
Application number
GB2939872A
Other versions
GB1605411A (en
Inventor
Anthony William Davis
Richard Edward Epworth
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.)
Nortel Ltd
Original Assignee
Nortel 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 Nortel Ltd filed Critical Nortel Ltd
Priority to GB2939872A priority Critical patent/GB1605411A/en
Anticipated expiration legal-status Critical
Publication of GB1605411A publication Critical patent/GB1605411A/en
Publication of GB1605411A8 publication Critical patent/GB1605411A8/en
Expired - Lifetime 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
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2491—Intrusion detection systems, i.e. where the body of an intruder causes the interference with the electromagnetic field
    • G08B13/2497—Intrusion detection systems, i.e. where the body of an intruder causes the interference with the electromagnetic field using transmission lines, e.g. cable
GB2939872A 1972-06-22 1972-06-22 Intruder detection apparatus Expired - Lifetime GB1605411A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2939872A GB1605411A (en) 1972-06-22 1972-06-22 Intruder detection apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2939872A GB1605411A (en) 1972-06-22 1972-06-22 Intruder detection apparatus

Publications (2)

Publication Number Publication Date
GB1605411A GB1605411A (en) 1997-04-02
GB1605411A8 true GB1605411A8 (en) 1999-03-18

Family

ID=10290948

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2939872A Expired - Lifetime GB1605411A (en) 1972-06-22 1972-06-22 Intruder detection apparatus

Country Status (1)

Country Link
GB (1) GB1605411A (en)

Also Published As

Publication number Publication date
GB1605411A (en) 1997-04-02

Similar Documents

Publication Publication Date Title
ZA73145B (en) Alarm apparatus
AU5819173A (en) Detection system
ZA721956B (en) Apparatus for operating alarms
CA960778A (en) Sensing apparatus
GB1446742A (en) Magnetic detector apparatus
HK7478A (en) Signal detection apparatus
GB1448723A (en) Fire warning apparatus
ZA726580B (en) Motion detection system
AU7578574A (en) Detection apparatus
GB1438146A (en) Granulating apparatus
ZA731749B (en) Intrusion detection system
GB1439055A (en) Detection system
GB1417981A (en) Vision-testing apparatus
ZA734531B (en) Monitoring device
AU5853073A (en) Smoke detecting system
ZA727350B (en) Personal alarm apparatus
AU5813073A (en) Surveillance apparatus
AU5927973A (en) Profing apparatus
GB1605411A8 (en) Intruder detection apparatus
AU6053773A (en) Presence detector
AU6090073A (en) Location apparatus
HK33676A (en) Strip processing apparatus
AU464506B2 (en) Infrared detection apparatus
ZA724825B (en) Surveillance apparatus
AU4838272A (en) Anti-shoplifting system