GB1209024A - Improvements in or relating to oil mist or smoke detection - Google Patents

Improvements in or relating to oil mist or smoke detection

Info

Publication number
GB1209024A
GB1209024A GB4724766A GB4724766A GB1209024A GB 1209024 A GB1209024 A GB 1209024A GB 4724766 A GB4724766 A GB 4724766A GB 4724766 A GB4724766 A GB 4724766A GB 1209024 A GB1209024 A GB 1209024A
Authority
GB
United Kingdom
Prior art keywords
oil mist
detector
smoke
photo
sample
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
GB4724766A
Inventor
Frank Kershaw
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.)
Associated British Combustion Ltd
Original Assignee
Associated British Combustion 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 Associated British Combustion Ltd filed Critical Associated British Combustion Ltd
Priority to GB4724766A priority Critical patent/GB1209024A/en
Publication of GB1209024A publication Critical patent/GB1209024A/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
    • 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
    • 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
    • G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
    • G01N21/274—Calibration, base line adjustment, drift correction

Landscapes

  • Physics & Mathematics (AREA)
  • Biochemistry (AREA)
  • Analytical Chemistry (AREA)
  • Pathology (AREA)
  • Immunology (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

1,209,024. Photo-electric smoke or oil mist detectors. ASSOCIATED BRITISH COMBUSTION Ltd. Jan.9, 1968 [Oct. 21, 1966], No.47247/66. Heading G1A. In a photo-electric oil mist or smoke detector the flow of oil mist or smoke bearing sample is periodically interrupted and the detector cleared of sample so that the detector can be zeroized. A tube 1 having a lamp 13 and photo-cell 14 at opposite ends receives an oil mist or smoke sample from an inlet 3 which is periodically blocked by solenoid operated plunger 5 which simultaneously opens a second inlet 4 to admit clean air to flush the tube. A cam 8 periodically energizes the solenoid and completes a circuit to a motor coupled to a potentiometer 10. If a recorder indicating the detector output is at this moment not at zero one or the other of contacts 12 is closed by a cam 11 to operate the motor and drive the recorder back to zero. Instead of a potentiometer 10, a shutter in the light path, and a reference light path of one is used, may be driven by motor 9 to zeroize the detector.
GB4724766A 1966-10-21 1966-10-21 Improvements in or relating to oil mist or smoke detection Expired GB1209024A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4724766A GB1209024A (en) 1966-10-21 1966-10-21 Improvements in or relating to oil mist or smoke detection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4724766A GB1209024A (en) 1966-10-21 1966-10-21 Improvements in or relating to oil mist or smoke detection

Publications (1)

Publication Number Publication Date
GB1209024A true GB1209024A (en) 1970-10-14

Family

ID=10444293

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4724766A Expired GB1209024A (en) 1966-10-21 1966-10-21 Improvements in or relating to oil mist or smoke detection

Country Status (1)

Country Link
GB (1) GB1209024A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2329999A1 (en) * 1975-10-30 1977-05-27 Innotec Oy INFRA-RED ANALYZER

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2329999A1 (en) * 1975-10-30 1977-05-27 Innotec Oy INFRA-RED ANALYZER

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees