JPH0455857U - - Google Patents
Info
- Publication number
- JPH0455857U JPH0455857U JP9729390U JP9729390U JPH0455857U JP H0455857 U JPH0455857 U JP H0455857U JP 9729390 U JP9729390 U JP 9729390U JP 9729390 U JP9729390 U JP 9729390U JP H0455857 U JPH0455857 U JP H0455857U
- Authority
- JP
- Japan
- Prior art keywords
- main device
- amplifier
- switch
- door phone
- secondary winding
- 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
- 239000003990 capacitor Substances 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 2
- 238000004804 winding Methods 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
- Telephone Set Structure (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9729390U JPH0455857U (en]) | 1990-09-18 | 1990-09-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9729390U JPH0455857U (en]) | 1990-09-18 | 1990-09-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0455857U true JPH0455857U (en]) | 1992-05-13 |
Family
ID=31837542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9729390U Pending JPH0455857U (en]) | 1990-09-18 | 1990-09-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0455857U (en]) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6064563A (ja) * | 1983-09-20 | 1985-04-13 | Toshiba Electric Equip Corp | インタ−ホン装置 |
| JPS6065653A (ja) * | 1983-09-21 | 1985-04-15 | Toshiba Electric Equip Corp | 放送装置 |
| JPS60206259A (ja) * | 1984-03-30 | 1985-10-17 | Toshiba Electric Equip Corp | インタ−ホンシステム |
| JPS6139761A (ja) * | 1984-07-31 | 1986-02-25 | Toshiba Electric Equip Corp | インタ−ホンシステム |
-
1990
- 1990-09-18 JP JP9729390U patent/JPH0455857U/ja active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6064563A (ja) * | 1983-09-20 | 1985-04-13 | Toshiba Electric Equip Corp | インタ−ホン装置 |
| JPS6065653A (ja) * | 1983-09-21 | 1985-04-15 | Toshiba Electric Equip Corp | 放送装置 |
| JPS60206259A (ja) * | 1984-03-30 | 1985-10-17 | Toshiba Electric Equip Corp | インタ−ホンシステム |
| JPS6139761A (ja) * | 1984-07-31 | 1986-02-25 | Toshiba Electric Equip Corp | インタ−ホンシステム |