JPH0416545Y2 - - Google Patents
Info
- Publication number
- JPH0416545Y2 JPH0416545Y2 JP12078688U JP12078688U JPH0416545Y2 JP H0416545 Y2 JPH0416545 Y2 JP H0416545Y2 JP 12078688 U JP12078688 U JP 12078688U JP 12078688 U JP12078688 U JP 12078688U JP H0416545 Y2 JPH0416545 Y2 JP H0416545Y2
- Authority
- JP
- Japan
- Prior art keywords
- timer
- signal
- call switch
- output signal
- circuit
- 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
- 230000004044 response Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Closed-Circuit Television Systems (AREA)
- Burglar Alarm Systems (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12078688U JPH0416545Y2 (en]) | 1988-09-13 | 1988-09-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12078688U JPH0416545Y2 (en]) | 1988-09-13 | 1988-09-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0241580U JPH0241580U (en]) | 1990-03-22 |
| JPH0416545Y2 true JPH0416545Y2 (en]) | 1992-04-14 |
Family
ID=31367209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12078688U Expired JPH0416545Y2 (en]) | 1988-09-13 | 1988-09-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0416545Y2 (en]) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2597043B2 (ja) * | 1990-10-11 | 1997-04-02 | アイホン株式会社 | テレビドアホン装置 |
-
1988
- 1988-09-13 JP JP12078688U patent/JPH0416545Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0241580U (en]) | 1990-03-22 |
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