JPH01135588U - - Google Patents
Info
- Publication number
- JPH01135588U JPH01135588U JP3101888U JP3101888U JPH01135588U JP H01135588 U JPH01135588 U JP H01135588U JP 3101888 U JP3101888 U JP 3101888U JP 3101888 U JP3101888 U JP 3101888U JP H01135588 U JPH01135588 U JP H01135588U
- Authority
- JP
- Japan
- Prior art keywords
- sound
- alarm
- doorway
- detects
- photoelectric conversion
- 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
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Burglar Alarm Systems (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3101888U JPH01135588U (id) | 1988-03-10 | 1988-03-10 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3101888U JPH01135588U (id) | 1988-03-10 | 1988-03-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH01135588U true JPH01135588U (id) | 1989-09-18 |
Family
ID=31256572
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3101888U Pending JPH01135588U (id) | 1988-03-10 | 1988-03-10 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH01135588U (id) |
-
1988
- 1988-03-10 JP JP3101888U patent/JPH01135588U/ja active Pending