JPS5496399A - Fire detector - Google Patents
Fire detectorInfo
- Publication number
- JPS5496399A JPS5496399A JP300478A JP300478A JPS5496399A JP S5496399 A JPS5496399 A JP S5496399A JP 300478 A JP300478 A JP 300478A JP 300478 A JP300478 A JP 300478A JP S5496399 A JPS5496399 A JP S5496399A
- Authority
- JP
- Japan
- Prior art keywords
- detector
- light
- smoke
- amount
- fire
- 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.)
- Pending
Links
Abstract
PURPOSE: To simplify the mechanism of the fire detector with a small size by securing detection even for the smoke and the heat via only the luminous element and the photo detector of the fire detector.
CONSTITUTION: Luminous element 1 composed of the light emitting diode and photo detector such as CdS or the like are put into darkroom 3 to which the smoke flows from outside in such a way that just a slight amount of light may enter detector 2 from element 1. At the same time, element 1 is located at the position where the thermal effect is received easily from outside. When the smoke flows between element 1 and detector 2, the light from element 1 is dispersed. And thus the amount of the light received from detector 2 increases to actuate alarm 4. At the same time, the temperature of element 1 increases when the ambient temperature rise up by the fire to decrease the amount of the light emitted. As a result, the light reception amount of detector 2 decreases to actuate alarm 4. In this way, the smoke, the heat and the stop of the light emission of element 1 can be detected at a detector part, thus simplifying the mechanism with a small size.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP300478A JPS5496399A (en) | 1978-01-14 | 1978-01-14 | Fire detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP300478A JPS5496399A (en) | 1978-01-14 | 1978-01-14 | Fire detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5496399A true JPS5496399A (en) | 1979-07-30 |
Family
ID=11545201
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP300478A Pending JPS5496399A (en) | 1978-01-14 | 1978-01-14 | Fire detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5496399A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2369437A (en) * | 2000-11-28 | 2002-05-29 | Graviner Ltd Kidde | An LED based temperature sensor |
-
1978
- 1978-01-14 JP JP300478A patent/JPS5496399A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2369437A (en) * | 2000-11-28 | 2002-05-29 | Graviner Ltd Kidde | An LED based temperature sensor |
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