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FR766241A - Exploration device usable in theft protection systems - Google Patents

Exploration device usable in theft protection systems

Info

Publication number
FR766241A
FR766241A FR766241DA FR766241A FR 766241 A FR766241 A FR 766241A FR 766241D A FR766241D A FR 766241DA FR 766241 A FR766241 A FR 766241A
Authority
FR
France
Prior art keywords
protection systems
theft protection
exploration device
device usable
usable
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
Other languages
French (fr)
Inventor
Francois De Roumefort
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 filed Critical
Application granted granted Critical
Publication of FR766241A publication Critical patent/FR766241A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR766241D 1933-12-29 1933-12-29 Exploration device usable in theft protection systems Expired FR766241A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR766241T 1933-12-29

Publications (1)

Publication Number Publication Date
FR766241A true FR766241A (en) 1934-06-25

Family

ID=9183193

Family Applications (1)

Application Number Title Priority Date Filing Date
FR766241D Expired FR766241A (en) 1933-12-29 1933-12-29 Exploration device usable in theft protection systems

Country Status (1)

Country Link
FR (1) FR766241A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1170286B (en) * 1952-05-12 1964-05-14 Lothar Franke Light protection grille

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1170286B (en) * 1952-05-12 1964-05-14 Lothar Franke Light protection grille

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