FR2219472A1 - - Google Patents

Info

Publication number
FR2219472A1
FR2219472A1 FR7306855A FR7306855A FR2219472A1 FR 2219472 A1 FR2219472 A1 FR 2219472A1 FR 7306855 A FR7306855 A FR 7306855A FR 7306855 A FR7306855 A FR 7306855A FR 2219472 A1 FR2219472 A1 FR 2219472A1
Authority
FR
France
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.)
Granted
Application number
FR7306855A
Other languages
French (fr)
Other versions
FR2219472B1 (en
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.)
KRUGER WILFRIED DT
Original Assignee
KRUGER WILFRIED DT
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 KRUGER WILFRIED DT filed Critical KRUGER WILFRIED DT
Priority to FR7306855A priority Critical patent/FR2219472B1/fr
Publication of FR2219472A1 publication Critical patent/FR2219472A1/fr
Application granted granted Critical
Publication of FR2219472B1 publication Critical patent/FR2219472B1/fr
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)
FR7306855A 1973-02-27 1973-02-27 Expired FR2219472B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7306855A FR2219472B1 (en) 1973-02-27 1973-02-27

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7306855A FR2219472B1 (en) 1973-02-27 1973-02-27

Publications (2)

Publication Number Publication Date
FR2219472A1 true FR2219472A1 (en) 1974-09-20
FR2219472B1 FR2219472B1 (en) 1977-09-02

Family

ID=9115448

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7306855A Expired FR2219472B1 (en) 1973-02-27 1973-02-27

Country Status (1)

Country Link
FR (1) FR2219472B1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR864990A (en) * 1940-01-05 1941-05-09 Monitoring device using light reflection
FR1068965A (en) * 1951-10-19 1954-07-02 Photoelectric barrier usable in particular as a safety device
US3109094A (en) * 1960-07-29 1963-10-29 Neil A Marshall Safety device for industrial machines comprising fluorescence detection apparatus
US3597755A (en) * 1968-05-28 1971-08-03 Sanders Associates Inc Active electro-optical intrusion alarm system having automatic balancing means
US3644917A (en) * 1969-09-18 1972-02-22 Detection Systems Inc Single terminal electro-optical intruder detection device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR864990A (en) * 1940-01-05 1941-05-09 Monitoring device using light reflection
FR1068965A (en) * 1951-10-19 1954-07-02 Photoelectric barrier usable in particular as a safety device
US3109094A (en) * 1960-07-29 1963-10-29 Neil A Marshall Safety device for industrial machines comprising fluorescence detection apparatus
US3597755A (en) * 1968-05-28 1971-08-03 Sanders Associates Inc Active electro-optical intrusion alarm system having automatic balancing means
US3644917A (en) * 1969-09-18 1972-02-22 Detection Systems Inc Single terminal electro-optical intruder detection device

Also Published As

Publication number Publication date
FR2219472B1 (en) 1977-09-02

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Legal Events

Date Code Title Description
ST Notification of lapse