FR1191117A - Improvements to infrared beacons - Google Patents

Improvements to infrared beacons

Info

Publication number
FR1191117A
FR1191117A FR1191117DA FR1191117A FR 1191117 A FR1191117 A FR 1191117A FR 1191117D A FR1191117D A FR 1191117DA FR 1191117 A FR1191117 A FR 1191117A
Authority
FR
France
Prior art keywords
infrared beacons
beacons
infrared
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)
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.)
LE TRANSISTOR IND
Original Assignee
LE TRANSISTOR IND
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 LE TRANSISTOR IND filed Critical LE TRANSISTOR IND
Application granted granted Critical
Publication of FR1191117A publication Critical patent/FR1191117A/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
    • G08B13/183—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 interruption of a radiation beam or barrier

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR1191117D 1958-02-05 1958-02-05 Improvements to infrared beacons Expired FR1191117A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1191117T 1958-02-05

Publications (1)

Publication Number Publication Date
FR1191117A true FR1191117A (en) 1959-10-16

Family

ID=9666723

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1191117D Expired FR1191117A (en) 1958-02-05 1958-02-05 Improvements to infrared beacons

Country Status (1)

Country Link
FR (1) FR1191117A (en)

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