JPS5329697A - Scattering light system smoke detector - Google Patents
Scattering light system smoke detectorInfo
- Publication number
- JPS5329697A JPS5329697A JP10445876A JP10445876A JPS5329697A JP S5329697 A JPS5329697 A JP S5329697A JP 10445876 A JP10445876 A JP 10445876A JP 10445876 A JP10445876 A JP 10445876A JP S5329697 A JPS5329697 A JP S5329697A
- Authority
- JP
- Japan
- Prior art keywords
- light
- smoke detector
- light system
- scattering light
- system smoke
- 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
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
- Fire-Detection Mechanisms (AREA)
Abstract
PURPOSE: The stray light within a smoke detecting chamber is considerably suppressed and an S/N ratio is increased by preventing the incidence of (L) times reflection of the direct light from a light reflecting elment on the opposing wall surface to which said light falls to the light receiving element after reflecting twice on the opposing wall surface which can be glanced over from the light receiving element, by means of light shield plates.
COPYRIGHT: (C)1978,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10445876A JPS5830639B2 (en) | 1976-08-31 | 1976-08-31 | Scattered light smoke detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10445876A JPS5830639B2 (en) | 1976-08-31 | 1976-08-31 | Scattered light smoke detector |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5329697A true JPS5329697A (en) | 1978-03-20 |
JPS5830639B2 JPS5830639B2 (en) | 1983-06-30 |
Family
ID=14381150
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10445876A Expired JPS5830639B2 (en) | 1976-08-31 | 1976-08-31 | Scattered light smoke detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5830639B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5659867A (en) * | 1979-10-22 | 1981-05-23 | Nippon Doro Kk | Paving material |
JPH0432061U (en) * | 1990-07-13 | 1992-03-16 |
-
1976
- 1976-08-31 JP JP10445876A patent/JPS5830639B2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5659867A (en) * | 1979-10-22 | 1981-05-23 | Nippon Doro Kk | Paving material |
JPH0432061U (en) * | 1990-07-13 | 1992-03-16 |
Also Published As
Publication number | Publication date |
---|---|
JPS5830639B2 (en) | 1983-06-30 |
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