JPH0521190Y2 - - Google Patents
Info
- Publication number
- JPH0521190Y2 JPH0521190Y2 JP6976787U JP6976787U JPH0521190Y2 JP H0521190 Y2 JPH0521190 Y2 JP H0521190Y2 JP 6976787 U JP6976787 U JP 6976787U JP 6976787 U JP6976787 U JP 6976787U JP H0521190 Y2 JPH0521190 Y2 JP H0521190Y2
- Authority
- JP
- Japan
- Prior art keywords
- door
- light
- optical fiber
- plate
- light reflecting
- 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 - Lifetime
Links
- 239000013307 optical fiber Substances 0.000 claims description 37
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- 230000003287 optical effect Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 230000005674 electromagnetic induction Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Landscapes
- Light Guides In General And Applications Therefor (AREA)
- Burglar Alarm Systems (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6976787U JPH0521190Y2 (enExample) | 1987-05-11 | 1987-05-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6976787U JPH0521190Y2 (enExample) | 1987-05-11 | 1987-05-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63179593U JPS63179593U (enExample) | 1988-11-21 |
| JPH0521190Y2 true JPH0521190Y2 (enExample) | 1993-05-31 |
Family
ID=30910794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6976787U Expired - Lifetime JPH0521190Y2 (enExample) | 1987-05-11 | 1987-05-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0521190Y2 (enExample) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011022810A (ja) * | 2009-07-16 | 2011-02-03 | Tosetz Co Ltd | 都市ガスのガバナー基地における侵入者感知器 |
-
1987
- 1987-05-11 JP JP6976787U patent/JPH0521190Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63179593U (enExample) | 1988-11-21 |
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