JPS623152U - - Google Patents
Info
- Publication number
- JPS623152U JPS623152U JP9469585U JP9469585U JPS623152U JP S623152 U JPS623152 U JP S623152U JP 9469585 U JP9469585 U JP 9469585U JP 9469585 U JP9469585 U JP 9469585U JP S623152 U JPS623152 U JP S623152U
- Authority
- JP
- Japan
- Prior art keywords
- transmission line
- signal transmission
- switch
- intercom
- speaker
- 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
- 230000008054 signal transmission Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Circuits Of Receivers In General (AREA)
Description
第１図は本考案の一実施例を示す回路図、第２
図は従来例を示す回路図である。
Ａ……インタ一ホン、Ｂ……インタ一ホン、３
……インタ一ホンスイツチ、４……チユ一ナ、６
……スピ一カ、７……アンプ、１３……インタ一
ホン呼出スイツチ、１５……スピ一カ、１６……
アンプ、２６……信号伝送線、２７……レベル検
出器、３０……レベル検出器。
Figure 1 is a circuit diagram showing one embodiment of the present invention;
The figure is a circuit diagram showing a conventional example. A...intercom, B...intercom, 3
...intercom switch, 4...chiyuna, 6
...Speaker, 7...Amplifier, 13...Interphone call switch, 15...Speaker, 16...
Amplifier, 26... signal transmission line, 27... level detector, 30... level detector.
Claims (1)
カ、インタ一ホンスイツチ或るいはインタ一ホン
呼出スイツチを有する複数のインタ一ホンを単一
の信号伝送線で接続し、他方のインタ一ホンのス
ピ一カに上記信号伝送線を介してラジオ信号を送
るようにしたものにおいて、前記スイツチの投入
による信号伝送線のレベル変化を検出するレベル
検出器を双方のインタ一ホンに設けて、この検出
器の作動により信号伝送線を介してインタ一ホン
回路を形成するようにしたことを特徴とするラジ
オ付インタ一ホン装置。 A single signal transmission line connects a plurality of intercoms that have a channel on one side and an amplifier, speaker, interphone switch, or intercom call switch on both sides, and A radio signal is sent to a speaker of a telephone via the signal transmission line, and both intercoms are provided with level detectors for detecting a change in the level of the signal transmission line caused by turning on the switch, An intercom device with a radio, characterized in that an intercom circuit is formed via a signal transmission line by the operation of this detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9469585U JPS623152U (en) | 1985-06-22 | 1985-06-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9469585U JPS623152U (en) | 1985-06-22 | 1985-06-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS623152U true JPS623152U (en) | 1987-01-09 |
Family
ID=30653401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9469585U Pending JPS623152U (en) | 1985-06-22 | 1985-06-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS623152U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS493389A (en) * | 1972-05-06 | 1974-01-12 | ||
| JPS58164365A (en) * | 1982-03-24 | 1983-09-29 | Seikosha Co Ltd | Interphone with radio |
-
1985
- 1985-06-22 JP JP9469585U patent/JPS623152U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS493389A (en) * | 1972-05-06 | 1974-01-12 | ||
| JPS58164365A (en) * | 1982-03-24 | 1983-09-29 | Seikosha Co Ltd | Interphone with radio |
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