GB1276977A - Improvements in and relating to apparatus for detecting the opacity of gases - Google Patents
Improvements in and relating to apparatus for detecting the opacity of gasesInfo
- Publication number
- GB1276977A GB1276977A GB1164570A GB1164570A GB1276977A GB 1276977 A GB1276977 A GB 1276977A GB 1164570 A GB1164570 A GB 1164570A GB 1164570 A GB1164570 A GB 1164570A GB 1276977 A GB1276977 A GB 1276977A
- Authority
- GB
- United Kingdom
- Prior art keywords
- spigots
- opacity
- detecting
- march
- photo
- 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
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)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
1276977 Detecting the opacity of gases M T PILLARD and F GUIGUES 11 March 1970 [13 March 1969] 11645/70 Heading G1A An apparatus for detecting the opacity of combustion smoke or gas containing particles 7 in suspension flowing through a duct comprises a light source and a photo-electric receiver, the source and receiver being disposed away from the hot walls 6 of the duct and being connected by optical fibres 14 to spigots 11, 10 so that the spigot 10 collects the light beam reflected by the particles in suspension. The spigots each take the form of a hollow sleeve 12 with scavenging air-flowing between the sleeve 12 and the optical fibre, said air being intended to prevent soot collecting on the optical fibres. To obviate errors due to temperature variations, the photo-electric receiver is paired with an identical but unilluminated detector heated to the same temperature, each detector being placed in one arm of a Wheatstone bridge. The two spigots are so secured to their plate 9 that their axes form with one another an angle which can be any value from 0 degrees to just under 180 degrees.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR6907420A FR2036476A5 (en) | 1969-03-13 | 1969-03-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1276977A true GB1276977A (en) | 1972-06-07 |
Family
ID=9030687
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1164570A Expired GB1276977A (en) | 1969-03-13 | 1970-03-11 | Improvements in and relating to apparatus for detecting the opacity of gases |
Country Status (4)
Country | Link |
---|---|
CA (1) | CA935661A (en) |
DE (1) | DE2011733A1 (en) |
FR (1) | FR2036476A5 (en) |
GB (1) | GB1276977A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2232242B (en) * | 1989-03-22 | 1993-04-07 | Graviner Ltd Kidde | Particulate detecting and optical coupling arrangements |
EP1069425A1 (en) * | 1999-07-12 | 2001-01-17 | Entreprise Generale De Chauffage Industriel Pillard | Method and device for detecting and measuring optically the quantity of opaque particles which are present in a gas |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3233368A1 (en) * | 1982-09-08 | 1984-03-08 | Heimann Gmbh, 6200 Wiesbaden | RADIATION SMOKE DETECTORS |
AT1157U1 (en) * | 1995-12-15 | 1996-11-25 | Avl Verbrennungskraft Messtech | METHOD FOR THE OPTICAL MEASUREMENT OF GAS BUBBLES IN A COOLANT |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR951331A (en) * | 1940-03-19 | 1949-10-21 | C O Two Fire Equipment Co | Improvements to smoke detectors and alarms |
US2892378A (en) * | 1955-04-26 | 1959-06-30 | Gen Electric | Indicating turbidimeter |
GB984571A (en) * | 1961-01-23 | 1965-02-24 | Graviner Manufacturing Co | Improvements in or relating to detectors of smoke and other fluid suspensions |
GB1179409A (en) * | 1966-11-28 | 1970-01-28 | Kidde Walter Co Ltd | Improvements in or relating to Smoke Detectors |
-
1969
- 1969-03-13 FR FR6907420A patent/FR2036476A5/fr not_active Expired
-
1970
- 1970-03-11 GB GB1164570A patent/GB1276977A/en not_active Expired
- 1970-03-12 DE DE19702011733 patent/DE2011733A1/de active Pending
- 1970-03-12 CA CA077318A patent/CA935661A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2232242B (en) * | 1989-03-22 | 1993-04-07 | Graviner Ltd Kidde | Particulate detecting and optical coupling arrangements |
EP1069425A1 (en) * | 1999-07-12 | 2001-01-17 | Entreprise Generale De Chauffage Industriel Pillard | Method and device for detecting and measuring optically the quantity of opaque particles which are present in a gas |
FR2796461A1 (en) * | 1999-07-12 | 2001-01-19 | Pillard Chauffage | METHOD AND DEVICE FOR OPTICAL DETECTION AND MEASUREMENT OF THE QUANTITY OF OPAQUE PARTICLES PRESENT IN A GAS |
Also Published As
Publication number | Publication date |
---|---|
FR2036476A5 (en) | 1970-12-24 |
CA935661A (en) | 1973-10-23 |
DE2011733A1 (en) | 1970-10-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
435 | Patent endorsed 'licences of right' on the date specified (sect. 35/1949) | ||
PE20 | Patent expired after termination of 20 years |