FR1511725A - Device for detecting the presence of an intruder - Google Patents

Device for detecting the presence of an intruder

Info

Publication number
FR1511725A
FR1511725A FR92305A FR92305A FR1511725A FR 1511725 A FR1511725 A FR 1511725A FR 92305 A FR92305 A FR 92305A FR 92305 A FR92305 A FR 92305A FR 1511725 A FR1511725 A FR 1511725A
Authority
FR
France
Prior art keywords
intruder
detecting
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
FR92305A
Other languages
French (fr)
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.)
RADARGUARD SECURITY Ltd
Original Assignee
RADARGUARD SECURITY 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 RADARGUARD SECURITY Ltd filed Critical RADARGUARD SECURITY Ltd
Priority claimed from GB3169/67A external-priority patent/GB1149302A/en
Application granted granted Critical
Publication of FR1511725A publication Critical patent/FR1511725A/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
    • G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
    • G08B13/187—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interference of a radiation field
FR92305A 1967-01-24 1967-01-24 Device for detecting the presence of an intruder Expired FR1511725A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3169/67A GB1149302A (en) 1966-03-15 1967-01-24 A continuous casting plant

Publications (1)

Publication Number Publication Date
FR1511725A true FR1511725A (en) 1968-02-02

Family

ID=9753229

Family Applications (1)

Application Number Title Priority Date Filing Date
FR92305A Expired FR1511725A (en) 1967-01-24 1967-01-24 Device for detecting the presence of an intruder

Country Status (1)

Country Link
FR (1) FR1511725A (en)

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