FR1083638A - Smoke detector device - Google Patents

Smoke detector device

Info

Publication number
FR1083638A
FR1083638A FR1083638DA FR1083638A FR 1083638 A FR1083638 A FR 1083638A FR 1083638D A FR1083638D A FR 1083638DA FR 1083638 A FR1083638 A FR 1083638A
Authority
FR
France
Prior art keywords
smoke detector
detector device
smoke
detector
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.)
Specialties Development Corp
Original Assignee
Specialties Development Corp
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 Specialties Development Corp filed Critical Specialties Development Corp
Application granted granted Critical
Publication of FR1083638A publication Critical patent/FR1083638A/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
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/29—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using visual detection

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (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)
  • Investigating Or Analysing Materials By Optical Means (AREA)
FR1083638D 1953-06-22 1953-06-22 Smoke detector device Expired FR1083638A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1083638T 1953-06-22

Publications (1)

Publication Number Publication Date
FR1083638A true FR1083638A (en) 1955-01-11

Family

ID=9611255

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1083638D Expired FR1083638A (en) 1953-06-22 1953-06-22 Smoke detector device

Country Status (3)

Country Link
US (1) US2731874A (en)
FR (1) FR1083638A (en)
NL (1) NL93083C (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB396390A (en) *
US1516608A (en) * 1921-06-28 1924-11-25 Kidde & Co Walter Detection of suspended matter in gases
US1807659A (en) * 1928-02-25 1931-06-02 of new yobk

Also Published As

Publication number Publication date
NL93083C (en)
US2731874A (en) 1956-01-24

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