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FR888847A - Light barrier detection device - Google Patents

Light barrier detection device

Info

Publication number
FR888847A
FR888847A FR888847DA FR888847A FR 888847 A FR888847 A FR 888847A FR 888847D A FR888847D A FR 888847DA FR 888847 A FR888847 A FR 888847A
Authority
FR
France
Prior art keywords
detection device
light barrier
barrier detection
light
detection
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.)
Albiswerk Zuerich AG
Original Assignee
Albiswerk Zuerich AG
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 Albiswerk Zuerich AG filed Critical Albiswerk Zuerich AG
Application granted granted Critical
Publication of FR888847A publication Critical patent/FR888847A/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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR888847D 1941-01-24 1942-01-20 Light barrier detection device Expired FR888847A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH888847X 1941-01-24

Publications (1)

Publication Number Publication Date
FR888847A true FR888847A (en) 1943-12-23

Family

ID=4545526

Family Applications (1)

Application Number Title Priority Date Filing Date
FR888847D Expired FR888847A (en) 1941-01-24 1942-01-20 Light barrier detection device

Country Status (1)

Country Link
FR (1) FR888847A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3056106A (en) * 1958-07-14 1962-09-25 Gamewell Co Infrared detectors
DE1235192B (en) * 1960-05-19 1967-02-23 Honeywell Inc Device for detecting objects moving along a path, in particular motor vehicles along a street

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3056106A (en) * 1958-07-14 1962-09-25 Gamewell Co Infrared detectors
DE1235192B (en) * 1960-05-19 1967-02-23 Honeywell Inc Device for detecting objects moving along a path, in particular motor vehicles along a street

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