FR1076231A - Détecteur de fumées perfectionné - Google Patents

Détecteur de fumées perfectionné

Info

Publication number
FR1076231A
FR1076231A FR1076231DA FR1076231A FR 1076231 A FR1076231 A FR 1076231A FR 1076231D A FR1076231D A FR 1076231DA FR 1076231 A FR1076231 A FR 1076231A
Authority
FR
France
Prior art keywords
smoke detector
advanced
advanced smoke
detector
smoke
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.)
Ronald Trist and Co Ltd
Original Assignee
Ronald Trist and Co Ltd
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 Ronald Trist and Co Ltd filed Critical Ronald Trist and Co Ltd
Application granted granted Critical
Publication of FR1076231A publication Critical patent/FR1076231A/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)
FR1076231D 1952-02-21 1953-02-20 Détecteur de fumées perfectionné Expired FR1076231A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1076231X 1952-02-21

Publications (1)

Publication Number Publication Date
FR1076231A true FR1076231A (fr) 1954-10-25

Family

ID=10872196

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1076231D Expired FR1076231A (fr) 1952-02-21 1953-02-20 Détecteur de fumées perfectionné

Country Status (1)

Country Link
FR (1) FR1076231A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1192569B (de) * 1961-04-07 1965-05-06 British American Tobacco Co Pruefgeraet fuer Zigarettenfilter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1192569B (de) * 1961-04-07 1965-05-06 British American Tobacco Co Pruefgeraet fuer Zigarettenfilter

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