FR1007552A - Alarm system and smoke detector - Google Patents

Alarm system and smoke detector

Info

Publication number
FR1007552A
FR1007552A FR1007552DA FR1007552A FR 1007552 A FR1007552 A FR 1007552A FR 1007552D A FR1007552D A FR 1007552DA FR 1007552 A FR1007552 A FR 1007552A
Authority
FR
France
Prior art keywords
alarm system
smoke detector
smoke
detector
alarm
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.)
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 FR1007552A publication Critical patent/FR1007552A/en
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

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)
  • Fire-Detection Mechanisms (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
FR1007552D 1949-01-05 1950-01-03 Alarm system and smoke detector Expired FR1007552A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB282899X 1949-01-05

Publications (1)

Publication Number Publication Date
FR1007552A true FR1007552A (en) 1952-05-07

Family

ID=10273294

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1007552D Expired FR1007552A (en) 1949-01-05 1950-01-03 Alarm system and smoke detector

Country Status (3)

Country Link
BE (1) BE493102A (en)
CH (1) CH282899A (en)
FR (1) FR1007552A (en)

Also Published As

Publication number Publication date
BE493102A (en)
CH282899A (en) 1952-05-15

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