JPH02111896U - - Google Patents
Info
- Publication number
- JPH02111896U JPH02111896U JP1788789U JP1788789U JPH02111896U JP H02111896 U JPH02111896 U JP H02111896U JP 1788789 U JP1788789 U JP 1788789U JP 1788789 U JP1788789 U JP 1788789U JP H02111896 U JPH02111896 U JP H02111896U
- Authority
- JP
- Japan
- Prior art keywords
- dark box
- top surface
- smoke detector
- photoelectric smoke
- circuit board
- 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
- 239000000779 smoke Substances 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 3
Landscapes
- Fire-Detection Mechanisms (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989017887U JP2536630Y2 (ja) | 1989-02-20 | 1989-02-20 | 光電式煙感知器 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989017887U JP2536630Y2 (ja) | 1989-02-20 | 1989-02-20 | 光電式煙感知器 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02111896U true JPH02111896U (en]) | 1990-09-06 |
| JP2536630Y2 JP2536630Y2 (ja) | 1997-05-21 |
Family
ID=31232058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989017887U Expired - Lifetime JP2536630Y2 (ja) | 1989-02-20 | 1989-02-20 | 光電式煙感知器 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2536630Y2 (en]) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4953494A (en]) * | 1972-06-27 | 1974-05-24 | ||
| JPS5738294U (en]) * | 1980-08-08 | 1982-03-01 |
-
1989
- 1989-02-20 JP JP1989017887U patent/JP2536630Y2/ja not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4953494A (en]) * | 1972-06-27 | 1974-05-24 | ||
| JPS5738294U (en]) * | 1980-08-08 | 1982-03-01 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2536630Y2 (ja) | 1997-05-21 |