JPH0186358U - - Google Patents
Info
- Publication number
- JPH0186358U JPH0186358U JP18087787U JP18087787U JPH0186358U JP H0186358 U JPH0186358 U JP H0186358U JP 18087787 U JP18087787 U JP 18087787U JP 18087787 U JP18087787 U JP 18087787U JP H0186358 U JPH0186358 U JP H0186358U
- Authority
- JP
- Japan
- Prior art keywords
- handset
- receiver
- fire alarm
- alarm equipment
- telephone device
- 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
- 238000010586 diagram Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Alarm Systems (AREA)
- Fire Alarms (AREA)
Description
第１図は本考案の一実施例を示した等価回路図
；第２図は従来の電話装置を示した回路図である
。
４：送受話器（受信機）、４ａ，５ａ：受話器
、４ｂ，５ｂ：送話器、５：送受話器（発信機）
、６ａ，６ｂ：電源兼用信号線、Ｄ２，Ｄ３：ダ
イオード（ノイズ低減用）、Ｃ１：コンデンサ。
FIG. 1 is an equivalent circuit diagram showing an embodiment of the present invention; FIG. 2 is a circuit diagram showing a conventional telephone device. 4: Handset/receiver (receiver), 4a, 5a: Handset, 4b, 5b: Transmitter, 5: Handset/receiver (transmitter)
, 6a, 6b: power supply/signal line, D2, D3: diode (for noise reduction), C1: capacitor.
Claims (1)
間に接続した発信機等のそれぞれに送受話器を設
け、送受話器相互間で通話連絡を行なう火災報知
設備の電話装置に於いて、 前記送受話器の受話器と並列に一方向又は双方
向の整流特性をもつ回路素子を接続したことを特
徴とする火災報知設備の電話装置。[Scope of Claim for Utility Model Registration] A telephone device for fire alarm equipment in which a receiver and a transmitter connected between a telephone line drawn out from the receiver are each equipped with a handset, and communication is carried out between the handsets. A telephone device for fire alarm equipment, characterized in that a circuit element having one-way or two-way rectification characteristics is connected in parallel to the handset of the handset.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18087787U JPH0186358U (en) | 1987-11-27 | 1987-11-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18087787U JPH0186358U (en) | 1987-11-27 | 1987-11-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0186358U true JPH0186358U (en) | 1989-06-07 |
Family
ID=31472381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18087787U Pending JPH0186358U (en) | 1987-11-27 | 1987-11-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0186358U (en) |
-
1987
- 1987-11-27 JP JP18087787U patent/JPH0186358U/ja active Pending
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