CH651410A5 - Optical smoke detector - Google Patents
Optical smoke detector Download PDFInfo
- Publication number
- CH651410A5 CH651410A5 CH3712/80A CH371280A CH651410A5 CH 651410 A5 CH651410 A5 CH 651410A5 CH 3712/80 A CH3712/80 A CH 3712/80A CH 371280 A CH371280 A CH 371280A CH 651410 A5 CH651410 A5 CH 651410A5
- Authority
- CH
- Switzerland
- Prior art keywords
- radiation
- detector
- smoke
- light
- reflector
- Prior art date
Links
- 239000000779 smoke Substances 0.000 title claims description 53
- 230000003287 optical effect Effects 0.000 title claims description 5
- 230000005855 radiation Effects 0.000 claims description 51
- 239000002245 particle Substances 0.000 description 25
- 230000035945 sensitivity Effects 0.000 description 5
- 238000000149 argon plasma sintering Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
- G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device
- G08B17/107—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device for detecting light-scattering due to smoke
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
- G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas
- G08B17/113—Constructional details
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Emergency Management (AREA)
- Business, Economics & Management (AREA)
- General Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Fire-Detection Mechanisms (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/039,467 US4230950A (en) | 1979-05-16 | 1979-05-16 | Electro-optic smoke detector |
| US06/045,025 US4221485A (en) | 1979-06-04 | 1979-06-04 | Optical smoke detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH651410A5 true CH651410A5 (en) | 1985-09-13 |
Family
ID=26716158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH3712/80A CH651410A5 (en) | 1979-05-16 | 1980-05-12 | Optical smoke detector |
Country Status (5)
| Country | Link |
|---|---|
| CH (1) | CH651410A5 (enExample) |
| DE (1) | DE3018021A1 (enExample) |
| FR (1) | FR2456529A1 (enExample) |
| IT (1) | IT1143096B (enExample) |
| SE (1) | SE8003547L (enExample) |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE682869C (de) * | 1929-02-24 | 1939-10-23 | Zeiss Carl Fa | Vorrichtung zum Messen des Truebungsgrades von Fluessigkeiten |
| CH278998A (de) * | 1949-08-22 | 1951-11-15 | Loeschcke Hans Dr Prof | Verfahren zur Zählung von in einem lichtdurchlässigen Medium schwebenden Teilchen und Messgerät zur Durchführung des Verfahrens. |
| NL132814C (enExample) * | 1963-07-24 | |||
| CH417405A (de) * | 1964-07-14 | 1966-07-15 | Cerberus Ag Werk Fuer Elektron | Vorrichtung zur Feststellung von Aerosolen in Luft |
| US3524707A (en) * | 1967-08-14 | 1970-08-18 | Julian E Hansen Sr | Pulsating light source smoke detector |
| GB1285977A (en) * | 1968-12-23 | 1972-08-16 | Gam Rad | Improved turbidimeter |
| US3713743A (en) * | 1970-11-25 | 1973-01-30 | Agricultural Control Syst | Forward scatter optical turbidimeter apparatus |
| JPS5431833B2 (enExample) * | 1972-12-28 | 1979-10-09 | ||
| JPS5855446B2 (ja) * | 1975-07-15 | 1983-12-09 | 松下電工株式会社 | 散乱光式煙感知器 |
| CH595113A5 (enExample) * | 1976-03-18 | 1978-01-31 | Cerberus Ag | |
| US4121110A (en) * | 1976-11-04 | 1978-10-17 | Solomon Elias E | Optically biased smoke detector |
-
1980
- 1980-05-10 DE DE3018021A patent/DE3018021A1/de active Granted
- 1980-05-12 CH CH3712/80A patent/CH651410A5/de not_active IP Right Cessation
- 1980-05-12 IT IT48651/80A patent/IT1143096B/it active
- 1980-05-12 FR FR8010612A patent/FR2456529A1/fr not_active Withdrawn
- 1980-05-12 SE SE8003547A patent/SE8003547L/ not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| IT1143096B (it) | 1986-10-22 |
| DE3018021C2 (enExample) | 1989-04-20 |
| DE3018021A1 (de) | 1980-11-27 |
| IT8048651A0 (it) | 1980-05-12 |
| SE8003547L (sv) | 1980-11-17 |
| FR2456529A1 (fr) | 1980-12-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased |