JPH0142229Y2 - - Google Patents
Info
- Publication number
- JPH0142229Y2 JPH0142229Y2 JP1988028901U JP2890188U JPH0142229Y2 JP H0142229 Y2 JPH0142229 Y2 JP H0142229Y2 JP 1988028901 U JP1988028901 U JP 1988028901U JP 2890188 U JP2890188 U JP 2890188U JP H0142229 Y2 JPH0142229 Y2 JP H0142229Y2
- Authority
- JP
- Japan
- Prior art keywords
- light
- shielding case
- small
- receiver
- bifocal lens
- 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.)
- Expired
Links
- 239000000779 smoke Substances 0.000 claims description 39
- 238000001514 detection method Methods 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 230000001678 irradiating effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
- Fire-Detection Mechanisms (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988028901U JPH0142229Y2 (US06373033-20020416-M00035.png) | 1988-03-03 | 1988-03-03 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988028901U JPH0142229Y2 (US06373033-20020416-M00035.png) | 1988-03-03 | 1988-03-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63143996U JPS63143996U (US06373033-20020416-M00035.png) | 1988-09-21 |
| JPH0142229Y2 true JPH0142229Y2 (US06373033-20020416-M00035.png) | 1989-12-11 |
Family
ID=30832295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988028901U Expired JPH0142229Y2 (US06373033-20020416-M00035.png) | 1988-03-03 | 1988-03-03 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0142229Y2 (US06373033-20020416-M00035.png) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5318179B2 (US06373033-20020416-M00035.png) * | 1973-11-17 | 1978-06-13 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4858080U (US06373033-20020416-M00035.png) * | 1971-11-08 | 1973-07-24 | ||
| JPS567882Y2 (US06373033-20020416-M00035.png) * | 1976-07-27 | 1981-02-20 |
-
1988
- 1988-03-03 JP JP1988028901U patent/JPH0142229Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5318179B2 (US06373033-20020416-M00035.png) * | 1973-11-17 | 1978-06-13 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63143996U (US06373033-20020416-M00035.png) | 1988-09-21 |
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