JPS5222979A - Photoelectric type smoke detector - Google Patents
Photoelectric type smoke detectorInfo
- Publication number
- JPS5222979A JPS5222979A JP9888275A JP9888275A JPS5222979A JP S5222979 A JPS5222979 A JP S5222979A JP 9888275 A JP9888275 A JP 9888275A JP 9888275 A JP9888275 A JP 9888275A JP S5222979 A JPS5222979 A JP S5222979A
- Authority
- JP
- Japan
- Prior art keywords
- smoke
- smoke detector
- type smoke
- photoelectric type
- light
- 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.)
- Granted
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)
- Fire-Detection Mechanisms (AREA)
Abstract
PURPOSE:To place a reflection mirror, light source and receiving element subsequently from the upstream of smoke flow in a box wherein smoke flowa in one direction thereby making it possible to obtain always constant scattered light intensity without distrubance in the light of the light source and the scattered light by smoke, by the smoke.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9888275A JPS5847656B2 (en) | 1975-08-13 | 1975-08-13 | Kodenshikikemurikanchiki |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9888275A JPS5847656B2 (en) | 1975-08-13 | 1975-08-13 | Kodenshikikemurikanchiki |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5222979A true JPS5222979A (en) | 1977-02-21 |
JPS5847656B2 JPS5847656B2 (en) | 1983-10-24 |
Family
ID=14231511
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9888275A Expired JPS5847656B2 (en) | 1975-08-13 | 1975-08-13 | Kodenshikikemurikanchiki |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5847656B2 (en) |
-
1975
- 1975-08-13 JP JP9888275A patent/JPS5847656B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5847656B2 (en) | 1983-10-24 |
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