JPS593364U - ionization smoke detector - Google Patents

ionization smoke detector

Info

Publication number
JPS593364U
JPS593364U JP9667282U JP9667282U JPS593364U JP S593364 U JPS593364 U JP S593364U JP 9667282 U JP9667282 U JP 9667282U JP 9667282 U JP9667282 U JP 9667282U JP S593364 U JPS593364 U JP S593364U
Authority
JP
Japan
Prior art keywords
electrode
ion chamber
smoke detector
field effect
effect transistor
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
JP9667282U
Other languages
Japanese (ja)
Inventor
耕平 山田
大西　巌
光男 長谷川
伊藤　章二
Original Assignee
ニッタン株式会社
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 by ニッタン株式会社 filed Critical ニッタン株式会社
Priority to JP9667282U priority Critical patent/JPS593364U/en
Publication of JPS593364U publication Critical patent/JPS593364U/en
Pending legal-status Critical Current

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Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

第１図はこの考案のイオン化式煙感知器の実施例を示す
縦断面図、第２図は中間電極を絶縁性の支持体に嵌合す
る状態を示す図である。 １・・・放射線源、２・・・内部電極、３・・・中間電
極、４・・・外部電極、８・・・支持体、９・・・シー
ルドケース、１０・・・電気回路基板、１５・・・ＦＥ
Ｔ。FIG. 1 is a longitudinal sectional view showing an embodiment of the ionization type smoke sensor of this invention, and FIG. 2 is a view showing a state in which an intermediate electrode is fitted into an insulating support. DESCRIPTION OF SYMBOLS 1... Radiation source, 2... Internal electrode, 3... Intermediate electrode, 4... External electrode, 8... Support body, 9... Shield case, 10... Electric circuit board, 15...FE
T.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 放射線源を設けた内部電極と、中間電極と、外部電極と
で内部イオン室および外部イオン室を形成し、該イオン
室のインピーダンスを変換する電界効果トランジスタを
有するイオン化式煙感知器において、上記中間電極を絶
縁性の支持体に嵌合支持し、かつ上記電界効果トランジ
スタのゲート電極リードを上記中間電極に直接接続して
成ることを特徴とするイオン式煙感知器。An ionization type smoke sensor in which an internal electrode provided with a radiation source, an intermediate electrode, and an external electrode form an internal ion chamber and an external ion chamber, and has a field effect transistor that converts the impedance of the ion chamber. An ion type smoke sensor characterized in that an electrode is fitted and supported by an insulating support, and a gate electrode lead of the field effect transistor is directly connected to the intermediate electrode.
JP9667282U 1982-06-29 1982-06-29 ionization smoke detector Pending JPS593364U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9667282U JPS593364U (en) 1982-06-29 1982-06-29 ionization smoke detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9667282U JPS593364U (en) 1982-06-29 1982-06-29 ionization smoke detector

Publications (1)

Publication Number Publication Date
JPS593364U true JPS593364U (en) 1984-01-10

Family

ID=30230287

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9667282U Pending JPS593364U (en) 1982-06-29 1982-06-29 ionization smoke detector

Country Status (1)

Country Link
JP (1) JPS593364U (en)

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