JPS61115291U - - Google Patents

Info

Publication number
JPS61115291U
JPS61115291U JP19756984U JP19756984U JPS61115291U JP S61115291 U JPS61115291 U JP S61115291U JP 19756984 U JP19756984 U JP 19756984U JP 19756984 U JP19756984 U JP 19756984U JP S61115291 U JPS61115291 U JP S61115291U
Authority
JP
Japan
Prior art keywords
fire
capacitor
emitter
output stage
receiving 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.)
Pending
Application number
JP19756984U
Other languages
Japanese (ja)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP19756984U priority Critical patent/JPS61115291U/ja
Publication of JPS61115291U publication Critical patent/JPS61115291U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Fire-Detection Mechanisms (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の１実施例を示す電気回路図、
第２図は電源投入時に火災感知器回線に流れる突
入電流の１例を示す波形図である。 Ｌ，Ｃ：火災感知器回線、Ｒ１：終端抵抗、Ｄ
：火災感知器、ＱＨ１：火災受信回路の火災検知
用入力段トランジスタ、ＱＨ２：火災受信回路の
火災検知用出力段トランジスタ、Ｒ４：火災検知
抵抗、ＺＤ１〜ＺＤ３：ゼナーダイオード、ＣＦ
：コンデンサ、ＲＦ：火災受信リレー。 FIG. 1 is an electrical circuit diagram showing one embodiment of the present invention;
FIG. 2 is a waveform diagram showing an example of the rush current flowing through the fire detector line when the power is turned on. L, C: Fire detector line, R1: Terminal resistor, D
: Fire detector, QH1: Input stage transistor for fire detection of fire receiving circuit, QH2: Output stage transistor for fire detection of fire receiving circuit, R4: Fire detection resistor, ZD1 to ZD3: Zener diode, CF
: Capacitor, RF: Fire reception relay.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 火災感知器が作動して火災感知器回線に流れる
火災監視電流が増大したとき、これを火災受信回
路で検出することにより火災の発生を感知する火
災感知装置において、火災監視電流を常時監視す
る前記火災受信回路の火災検知用出力段トランジ
スタをエミツタ接地すると共に、該トランジスタ
のベース・エミツタ間のコンデンサを並列に接続
し、該コンデンサの容量を、電源投入時に前記火
災感知器回線に流れる突入電流が少なくとも火災
検知レベル以下となる時間以上の遅延動作時間を
前記出力段トランジスタに与える容量としたこと
を特徴とする火災感知器の突入電流による誤動作
防止回路。 In a fire detection device that detects the occurrence of a fire by detecting this in a fire receiving circuit when a fire detector is activated and the fire monitoring current flowing through the fire detector line increases, the fire monitoring current is constantly monitored. The emitter of the output stage transistor for fire detection in the fire receiving circuit is grounded, and a capacitor between the base and emitter of the transistor is connected in parallel. A circuit for preventing malfunction due to inrush current of a fire detector, characterized in that a capacitor is used to provide the output stage transistor with a delay operation time that is at least longer than the time required for the temperature to drop below a fire detection level.
JP19756984U 1984-12-28 1984-12-28 Pending JPS61115291U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19756984U JPS61115291U (en) 1984-12-28 1984-12-28

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19756984U JPS61115291U (en) 1984-12-28 1984-12-28

Publications (1)

Publication Number Publication Date
JPS61115291U true JPS61115291U (en) 1986-07-21

Family

ID=30755934

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19756984U Pending JPS61115291U (en) 1984-12-28 1984-12-28

Country Status (1)

Country Link
JP (1) JPS61115291U (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5644994A (en) * 1979-09-19 1981-04-24 Nittan Co Ltd Fire alarm
JPS5937912U (en) * 1982-08-27 1984-03-10 株式会社トヨトミ Heating coil holding structure of combustion tube

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5644994A (en) * 1979-09-19 1981-04-24 Nittan Co Ltd Fire alarm
JPS5937912U (en) * 1982-08-27 1984-03-10 株式会社トヨトミ Heating coil holding structure of combustion tube

Similar Documents

Publication Publication Date Title
KR860001508A (en) Over Current Protection Circuit
US4757341A (en) AC contactless switch
JPS61115291U (en)
US3601620A (en) Power supply
JPS6321148Y2 (en)
JPH0720797Y2 (en) Power alarm circuit
JPH074716Y2 (en) Fire detector
JPS5816103Y2 (en) Self-holding automatic recovery circuit
JPS626530Y2 (en)
JPH0326458Y2 (en)
JPH0342539Y2 (en)
JPS6347994Y2 (en)
JPH0435714Y2 (en)
JPS5856158B2 (en) Fire alarm receiving circuit
JPS5813955B2 (en) Kasaijyushinki
JPH0342540Y2 (en)
KR790001901Y1 (en) Switch circuit for power saving
JPH0416507Y2 (en)
JPS58174793U (en) fire alarm device
JPS607554Y2 (en) Muting drive circuit
JPH05343966A (en) Overcurrent protection device
JPH048129U (en)
JPS6170294U (en)
JPS5755435A (en) Check method for bus signal line
JPS5851740U (en) day fibrillator