JPH01130361U - - Google Patents
Info
- Publication number
- JPH01130361U JPH01130361U JP2303988U JP2303988U JPH01130361U JP H01130361 U JPH01130361 U JP H01130361U JP 2303988 U JP2303988 U JP 2303988U JP 2303988 U JP2303988 U JP 2303988U JP H01130361 U JPH01130361 U JP H01130361U
- Authority
- JP
- Japan
- Prior art keywords
- plate
- hook
- shaped shutter
- shutter
- electromagnet
- 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
- 238000009423 ventilation Methods 0.000 claims description 5
- 230000002265 prevention Effects 0.000 claims description 3
Landscapes
- Air-Flow Control Members (AREA)
- Ventilation (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2303988U JPH01130361U (fr) | 1988-02-25 | 1988-02-25 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2303988U JPH01130361U (fr) | 1988-02-25 | 1988-02-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH01130361U true JPH01130361U (fr) | 1989-09-05 |
Family
ID=31241694
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2303988U Pending JPH01130361U (fr) | 1988-02-25 | 1988-02-25 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH01130361U (fr) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51140344A (en) * | 1975-05-29 | 1976-12-03 | Showa Saajiento Kk | Method and apparatus for automatically closing anti-smoke fire door |
-
1988
- 1988-02-25 JP JP2303988U patent/JPH01130361U/ja active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51140344A (en) * | 1975-05-29 | 1976-12-03 | Showa Saajiento Kk | Method and apparatus for automatically closing anti-smoke fire door |