JPS62117691U - - Google Patents
Info
- Publication number
- JPS62117691U JPS62117691U JP409586U JP409586U JPS62117691U JP S62117691 U JPS62117691 U JP S62117691U JP 409586 U JP409586 U JP 409586U JP 409586 U JP409586 U JP 409586U JP S62117691 U JPS62117691 U JP S62117691U
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- radiation source
- smoke detector
- external
- intermediate electrode
- 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.)
- Granted
Links
- 230000005855 radiation Effects 0.000 claims description 4
- 239000000779 smoke Substances 0.000 claims description 4
- 230000005669 field effect Effects 0.000 description 1
Landscapes
- Fire-Detection Mechanisms (AREA)
Description
第１図はこの考案のイオン化式煙感知器の一実
施例の断面図、第２図は第１図のプリント基板及
び内外イオン室の平面図である。
１０……プリント基板、１３……絶縁基台、１
５……電界効果トランジスタ、１６……外部電極
、１７……中間電極、１８……内部電極、１９…
…内部イオン室、２０……外部イオン室、２１…
…放射線源、２２……通孔、２３……ＩＣ回路。
FIG. 1 is a sectional view of an embodiment of the ionization type smoke detector of this invention, and FIG. 2 is a plan view of the printed circuit board and the inner and outer ion chambers of FIG. 1. 10...Printed circuit board, 13...Insulating base, 1
5... Field effect transistor, 16... External electrode, 17... Intermediate electrode, 18... Internal electrode, 19...
...Inner ion chamber, 20...Outer ion chamber, 21...
...radiation source, 22...through hole, 23...IC circuit.
Claims (1)
化する放射線源および両イオン室の接続点の電位
を検出する電気回路を備えたイオン化式煙感知器
において、プリント基板に一定間隔を置いて断面
Ｔ字状の外部電極と板状の中間電極および内部電
極とを立設し、外部電極とプリント基板間に電気
的シールドを必要とする回路素子が、内部電極に
放射線源がまた中間電極には通孔が設けられ、こ
の通孔を介して内部電極の放射線源が中間電極と
外部電極とでなる外部イオン室に放射され、室内
の空気がイオン化されることを特徴とするイオン
化式煙感知器。 ２ 中間電極は絶縁台を介してプリント基板に立
設された実用新案登録請求の範囲第１項記載のイ
オン化式煙感知器。[Scope of Claim for Utility Model Registration] 1. In an ionization type smoke detector equipped with an inner and outer ion chamber, a radiation source that ionizes the air in the inner and outer ion chambers, and an electric circuit that detects the potential at the connection point of both ion chambers, An external electrode with a T-shaped cross section, a plate-shaped intermediate electrode, and an internal electrode are set up at regular intervals, and a circuit element that requires an electrical shield between the external electrode and the printed circuit board has a radiation source on the internal electrode. The intermediate electrode is also provided with a through hole, through which the radiation source of the internal electrode is radiated into the external ion chamber consisting of the intermediate electrode and the external electrode, and the air in the room is ionized. Ionization smoke detector. 2. The ionization smoke detector according to claim 1, wherein the intermediate electrode is erected on a printed circuit board via an insulating stand.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP409586U JPH0421186Y2 (en) | 1986-01-17 | 1986-01-17 | |
| CA000527315A CA1267735A (en) | 1986-01-17 | 1987-01-14 | Ionization type-smoke detector |
| US07/003,717 US4786811A (en) | 1986-01-17 | 1987-01-16 | Ionization type-smoke detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP409586U JPH0421186Y2 (en) | 1986-01-17 | 1986-01-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62117691U true JPS62117691U (en) | 1987-07-25 |
| JPH0421186Y2 JPH0421186Y2 (en) | 1992-05-14 |
Family
ID=30784453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP409586U Expired JPH0421186Y2 (en) | 1986-01-17 | 1986-01-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0421186Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01116894U (en) * | 1988-01-29 | 1989-08-07 |
-
1986
- 1986-01-17 JP JP409586U patent/JPH0421186Y2/ja not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01116894U (en) * | 1988-01-29 | 1989-08-07 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0421186Y2 (en) | 1992-05-14 |
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