JPH01180641U - - Google Patents
Info
- Publication number
- JPH01180641U JPH01180641U JP7304588U JP7304588U JPH01180641U JP H01180641 U JPH01180641 U JP H01180641U JP 7304588 U JP7304588 U JP 7304588U JP 7304588 U JP7304588 U JP 7304588U JP H01180641 U JPH01180641 U JP H01180641U
- Authority
- JP
- Japan
- Prior art keywords
- light
- receiving element
- filter
- slit plate
- smoke detector
- 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
- 239000000779 smoke Substances 0.000 claims description 8
- 230000000903 blocking effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
- Fire-Detection Mechanisms (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7304588U JPH01180641U (fr) | 1988-05-31 | 1988-05-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7304588U JPH01180641U (fr) | 1988-05-31 | 1988-05-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01180641U true JPH01180641U (fr) | 1989-12-26 |
Family
ID=31298196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7304588U Pending JPH01180641U (fr) | 1988-05-31 | 1988-05-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01180641U (fr) |
-
1988
- 1988-05-31 JP JP7304588U patent/JPH01180641U/ja active Pending