FR763871A - Dispositif photo-électrique pour la détection des fumées - Google Patents

Dispositif photo-électrique pour la détection des fumées

Info

Publication number
FR763871A
FR763871A FR763871DA FR763871A FR 763871 A FR763871 A FR 763871A FR 763871D A FR763871D A FR 763871DA FR 763871 A FR763871 A FR 763871A
Authority
FR
France
Prior art keywords
photoelectric device
smoke detection
smoke
detection
photoelectric
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
English (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.)
Phillips & Pain Ets
Original Assignee
Phillips & Pain Ets
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 Phillips & Pain Ets filed Critical Phillips & Pain Ets
Application granted granted Critical
Publication of FR763871A publication Critical patent/FR763871A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
    • G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
    • G01N21/534—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke by measuring transmission alone, i.e. determining opacity

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
FR763871D 1933-02-03 1933-02-03 Dispositif photo-électrique pour la détection des fumées Expired FR763871A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR763871T 1933-02-03

Publications (1)

Publication Number Publication Date
FR763871A true FR763871A (fr) 1934-05-08

Family

ID=9181403

Family Applications (1)

Application Number Title Priority Date Filing Date
FR763871D Expired FR763871A (fr) 1933-02-03 1933-02-03 Dispositif photo-électrique pour la détection des fumées

Country Status (1)

Country Link
FR (1) FR763871A (fr)

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