JPH026391U - - Google Patents
Info
- Publication number
- JPH026391U JPH026391U JP8535788U JP8535788U JPH026391U JP H026391 U JPH026391 U JP H026391U JP 8535788 U JP8535788 U JP 8535788U JP 8535788 U JP8535788 U JP 8535788U JP H026391 U JPH026391 U JP H026391U
- Authority
- JP
- Japan
- Prior art keywords
- pair
- diodes
- integrated circuit
- switch element
- fire detector
- 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
- 238000010521 absorption reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Fire-Detection Mechanisms (AREA)
- Fire Alarms (AREA)
Description
第１図は本考案の第１実施例の回路図、第２図
は本考案の第２実施例の回路図、第３図は従来例
の回路図、第４図は他の従来例の回路図である。
Ｄ１，Ｄ２はダイオード、ＺＤ１，ＺＤ２はツ
エナダイオード、Ｑはサイリスタである。
Fig. 1 is a circuit diagram of the first embodiment of the present invention, Fig. 2 is a circuit diagram of the second embodiment of the invention, Fig. 3 is a circuit diagram of a conventional example, and Fig. 4 is a circuit of another conventional example. It is a diagram. D 1 and D 2 are diodes, ZD 1 and ZD 2 are Zener diodes, and Q is a thyristor.
Claims (1)
一対の直流側端子間にスイツチ要素を接続された
ダイオードブリツジを備え、一対の感知線の間に
サージ電圧吸収用の一対のツエナダイオードを逆
直列接続して成る火災感知器において、前記ダイ
オードブリツジにおける第１対のダイオードと前
記スイツチ要素は集積回路の内部に形成され、前
記一対のツエナダイオードは前記ダイオードブリ
ツジにおける第２対のダイオードと兼用され、且
つ前記集積回路の外部に外付けされることを特徴
とする火災感知器。 A pair of AC side terminals are connected to a pair of sensing wires,
A fire detector comprising a diode bridge in which a switch element is connected between a pair of DC side terminals, and a pair of Zener diodes for surge voltage absorption connected in anti-series between a pair of sensing wires. A first pair of diodes in the bridge and the switch element are formed inside an integrated circuit, and the pair of Zener diodes is also used as a second pair of diodes in the diode bridge, and is externally connected outside the integrated circuit. A fire detector characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8535788U JPH026391U (en) | 1988-06-27 | 1988-06-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8535788U JPH026391U (en) | 1988-06-27 | 1988-06-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH026391U true JPH026391U (en) | 1990-01-17 |
Family
ID=31310029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8535788U Pending JPH026391U (en) | 1988-06-27 | 1988-06-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH026391U (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50143481A (en) * | 1974-05-08 | 1975-11-18 | ||
| JPS58213397A (en) * | 1983-04-30 | 1983-12-12 | 松下電工株式会社 | Fire sensor |
| JPS58218873A (en) * | 1982-06-14 | 1983-12-20 | Nippon Denso Co Ltd | Power supply circuit for car |
| JPS62109197A (en) * | 1985-11-08 | 1987-05-20 | 日本信号株式会社 | Fire sensor |
-
1988
- 1988-06-27 JP JP8535788U patent/JPH026391U/ja active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50143481A (en) * | 1974-05-08 | 1975-11-18 | ||
| JPS58218873A (en) * | 1982-06-14 | 1983-12-20 | Nippon Denso Co Ltd | Power supply circuit for car |
| JPS58213397A (en) * | 1983-04-30 | 1983-12-12 | 松下電工株式会社 | Fire sensor |
| JPS62109197A (en) * | 1985-11-08 | 1987-05-20 | 日本信号株式会社 | Fire sensor |