FR2157741B1 - - Google Patents

Info

Publication number
FR2157741B1
FR2157741B1 FR7139036A FR7139036A FR2157741B1 FR 2157741 B1 FR2157741 B1 FR 2157741B1 FR 7139036 A FR7139036 A FR 7139036A FR 7139036 A FR7139036 A FR 7139036A FR 2157741 B1 FR2157741 B1 FR 2157741B1
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.)
Expired
Application number
FR7139036A
Other languages
French (fr)
Other versions
FR2157741A1 (https=
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.)
Thales SA
Original Assignee
Thomson CSF SA
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 Thomson CSF SA filed Critical Thomson CSF SA
Priority to FR7139036A priority Critical patent/FR2157741B1/fr
Publication of FR2157741A1 publication Critical patent/FR2157741A1/fr
Application granted granted Critical
Publication of FR2157741B1 publication Critical patent/FR2157741B1/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL 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)
FR7139036A 1971-10-29 1971-10-29 Expired FR2157741B1 (https=)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7139036A FR2157741B1 (https=) 1971-10-29 1971-10-29

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7139036A FR2157741B1 (https=) 1971-10-29 1971-10-29

Publications (2)

Publication Number Publication Date
FR2157741A1 FR2157741A1 (https=) 1973-06-08
FR2157741B1 true FR2157741B1 (https=) 1974-03-29

Family

ID=9085122

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7139036A Expired FR2157741B1 (https=) 1971-10-29 1971-10-29

Country Status (1)

Country Link
FR (1) FR2157741B1 (https=)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2912683A (en) * 1956-12-31 1959-11-10 Kidde & Co Walter Apparatus for photoelectric intruder detection
GB1017178A (en) * 1963-08-29 1966-01-19 Nat Res Dev Beam interruption detector
GB1082973A (en) * 1964-04-02 1967-09-13 Int Research & Dev Co Ltd Electrical interrupted-beam alarm systems
US3534351A (en) * 1967-04-07 1970-10-13 Gen Electric Light coupled battery powered remote control apparatus

Also Published As

Publication number Publication date
FR2157741A1 (https=) 1973-06-08

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Legal Events

Date Code Title Description
ST Notification of lapse