FR2042461A7 - - Google Patents

Info

Publication number
FR2042461A7
FR2042461A7 FR7016625A FR7016625A FR2042461A7 FR 2042461 A7 FR2042461 A7 FR 2042461A7 FR 7016625 A FR7016625 A FR 7016625A FR 7016625 A FR7016625 A FR 7016625A FR 2042461 A7 FR2042461 A7 FR 2042461A7
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
FR7016625A
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.)
FRAZER NASH WILLIAMSON
Original Assignee
FRAZER NASH WILLIAMSON
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 FRAZER NASH WILLIAMSON filed Critical FRAZER NASH WILLIAMSON
Application granted granted Critical
Publication of FR2042461A7 publication Critical patent/FR2042461A7/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
    • G08B13/183—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
    • G08B13/184—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 using radiation reflectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V8/00—Prospecting or detecting by optical means
    • G01V8/10—Detecting, e.g. by using light barriers
    • G01V8/20—Detecting, e.g. by using light barriers using multiple transmitters or receivers
    • G01V8/26—Detecting, e.g. by using light barriers using multiple transmitters or receivers using mechanical scanning systems

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Length Measuring Devices By Optical Means (AREA)
FR7016625A 1969-05-07 1970-05-06 Expired FR2042461A7 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB2335869 1969-05-07
GB2435769 1969-05-13
GB5565469 1969-11-13

Publications (1)

Publication Number Publication Date
FR2042461A7 true FR2042461A7 (en) 1971-02-12

Family

ID=27258207

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7016625A Expired FR2042461A7 (en) 1969-05-07 1970-05-06

Country Status (2)

Country Link
DE (1) DE2022546A1 (en)
FR (1) FR2042461A7 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2538567A1 (en) * 1982-12-24 1984-06-29 Bocquet Expl Bureau Etu Indles Photoelectric scanning device by deflection of a light ray, and application to the determination of the minimum and maximum dimensions of a contour

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU6594080A (en) * 1980-01-19 1981-07-30 W. Vinten Ltd. Intruder alarm systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2538567A1 (en) * 1982-12-24 1984-06-29 Bocquet Expl Bureau Etu Indles Photoelectric scanning device by deflection of a light ray, and application to the determination of the minimum and maximum dimensions of a contour

Also Published As

Publication number Publication date
DE2022546A1 (en) 1970-11-19

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Legal Events

Date Code Title Description
ST Notification of lapse