GB704052A - Improvements in or relating to smokemeters - Google Patents
Improvements in or relating to smokemetersInfo
- Publication number
- GB704052A GB704052A GB1158952A GB1158952A GB704052A GB 704052 A GB704052 A GB 704052A GB 1158952 A GB1158952 A GB 1158952A GB 1158952 A GB1158952 A GB 1158952A GB 704052 A GB704052 A GB 704052A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- apertures
- photo
- cell
- air
- 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
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
- G01N21/255—Details, e.g. use of specially adapted sources, lighting or optical systems
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)
- Spectroscopy & Molecular Physics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Optical Measuring Cells (AREA)
Abstract
704,052. Photo-electric smokemeters. ANGLOIRANIAN OIL CO., Ltd., and WACHAL, A. L. May 7, 1952, No. 11589/52. Class 40 (3) In a photo-electric smokemeter in which light passes from a source at one end of a tube, through which smoke circulates, to a photo-cell at the other, the cell and light source are so mounted that they may be positioned at the ends of a tube through which air is circulated for calibrating purposes. As shown, the light source 24 in a housing 23 and a photo-cell 28 are supported from a horizontal rod 5 so that they pivot about this rod into positions at opposite ends of either the test tube 1 through which smoke is circulated or the comparison tube 2 through which air is passed. The application of the invention to measuring the opacity of engine exhaust gases is described. A sample of the exhaust gases passes through a lagged pipe to a chamber 15 entering tube 1 through apertures 12 and leaving through apertures 18, 18<SP>1</SP>. Tube 1 is lagged to prevent condensation of exhaust water. A supply of compressed air enters tube 2 through a pipe 17 and apertures 13 and escapes into end covers 26, 29 of the apertures. This air then enters the smoke tube through apertures 39 in the light source housing and under the serrated surface of the photo-cell 28 finally escaping to the atmosphere through apertures 18, 18<SP>1</SP>. This stream of air prevents the exhaust gases from contacting the light source or the photo-electric cell. When the cell and light source are positioned at opposite ends of the comparison tube the reading of the micrometer is eventually adjusted to a fixed value by means of a rotatable "spade" 27 situated in the air tube.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1158952A GB704052A (en) | 1952-05-07 | 1952-05-07 | Improvements in or relating to smokemeters |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1158952A GB704052A (en) | 1952-05-07 | 1952-05-07 | Improvements in or relating to smokemeters |
Publications (1)
Publication Number | Publication Date |
---|---|
GB704052A true GB704052A (en) | 1954-02-17 |
Family
ID=9989014
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1158952A Expired GB704052A (en) | 1952-05-07 | 1952-05-07 | Improvements in or relating to smokemeters |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB704052A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2935909A (en) * | 1957-04-18 | 1960-05-10 | Graviner Manufacturing Co | Detectors of oil mists and the like |
EP0047049A1 (en) * | 1980-08-28 | 1982-03-10 | The Babcock & Wilcox Company | Opacity monitoring apparatus |
GB2257515A (en) * | 1991-07-05 | 1993-01-13 | Churchill V L Ltd | Smoke meter |
GB2274332A (en) * | 1993-01-15 | 1994-07-20 | Secr Defence | Smoke meter |
-
1952
- 1952-05-07 GB GB1158952A patent/GB704052A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2935909A (en) * | 1957-04-18 | 1960-05-10 | Graviner Manufacturing Co | Detectors of oil mists and the like |
EP0047049A1 (en) * | 1980-08-28 | 1982-03-10 | The Babcock & Wilcox Company | Opacity monitoring apparatus |
GB2257515A (en) * | 1991-07-05 | 1993-01-13 | Churchill V L Ltd | Smoke meter |
GB2257515B (en) * | 1991-07-05 | 1995-07-12 | Churchill V L Ltd | Smoke meter |
GB2274332A (en) * | 1993-01-15 | 1994-07-20 | Secr Defence | Smoke meter |
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