JPH02138396U - - Google Patents
Info
- Publication number
- JPH02138396U JPH02138396U JP4468889U JP4468889U JPH02138396U JP H02138396 U JPH02138396 U JP H02138396U JP 4468889 U JP4468889 U JP 4468889U JP 4468889 U JP4468889 U JP 4468889U JP H02138396 U JPH02138396 U JP H02138396U
- Authority
- JP
- Japan
- Prior art keywords
- current
- light emitting
- level
- emitting element
- 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.)
- Pending
Links
- 239000000779 smoke Substances 0.000 claims description 12
- 238000012544 monitoring process Methods 0.000 claims 5
- 230000004913 activation Effects 0.000 claims 2
- 230000002779 inactivation Effects 0.000 claims 2
- 235000014676 Phragmites communis Nutrition 0.000 claims 1
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
- Fire-Detection Mechanisms (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4468889U JPH02138396U (enrdf_load_stackoverflow) | 1989-04-17 | 1989-04-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4468889U JPH02138396U (enrdf_load_stackoverflow) | 1989-04-17 | 1989-04-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02138396U true JPH02138396U (enrdf_load_stackoverflow) | 1990-11-19 |
Family
ID=31558212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4468889U Pending JPH02138396U (enrdf_load_stackoverflow) | 1989-04-17 | 1989-04-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02138396U (enrdf_load_stackoverflow) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2023115098A (ja) * | 2019-03-27 | 2023-08-18 | ホーチキ株式会社 | 試験システム、及び試験装置 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52152273A (en) * | 1976-06-11 | 1977-12-17 | Matsushita Electric Works Ltd | Action checking method of light dimming type smoke sensor |
| JPS533880A (en) * | 1976-07-01 | 1978-01-13 | Matsushita Electric Works Ltd | Sensitivity checking method for scattered light type smoke detector |
-
1989
- 1989-04-17 JP JP4468889U patent/JPH02138396U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52152273A (en) * | 1976-06-11 | 1977-12-17 | Matsushita Electric Works Ltd | Action checking method of light dimming type smoke sensor |
| JPS533880A (en) * | 1976-07-01 | 1978-01-13 | Matsushita Electric Works Ltd | Sensitivity checking method for scattered light type smoke detector |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2023115098A (ja) * | 2019-03-27 | 2023-08-18 | ホーチキ株式会社 | 試験システム、及び試験装置 |