JPS63143996U - - Google Patents

Info

Publication number
JPS63143996U
JPS63143996U JP2890188U JP2890188U JPS63143996U JP S63143996 U JPS63143996 U JP S63143996U JP 2890188 U JP2890188 U JP 2890188U JP 2890188 U JP2890188 U JP 2890188U JP S63143996 U JPS63143996 U JP S63143996U
Authority
JP
Japan
Prior art keywords
light
emitter
receiver
irradiates
collects
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
Application number
JP2890188U
Other languages
English (en)
Other versions
JPH0142229Y2 (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 JP1988028901U priority Critical patent/JPH0142229Y2/ja
Publication of JPS63143996U publication Critical patent/JPS63143996U/ja
Application granted granted Critical
Publication of JPH0142229Y2 publication Critical patent/JPH0142229Y2/ja
Expired legal-status Critical Current

Links

Landscapes

  • Fire-Detection Mechanisms (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Description

【図面の簡単な説明】
第1図はこの考案の一実施例の減光式煙感知器
の要部の構成を示す断面図、第2図は従来の減光
式煙感知器の構成を示す断面図、第3図は再帰性
反射板の反射指向特性図、第4図は従来例の欠点
を説明するための説明図である。 8…投光器、9…受光器、10…2焦点レンズ
、10a…中央部、10b…周縁部。

Claims (1)

    【実用新案登録請求の範囲】
  1. 同軸上に前後に配置した煙感知用の投光器およ
    び受光器と、この投光器および受光器の同軸上の
    前方に配置され中央部と周縁部とで異なる曲率を
    有して中央部で前記投光器の光を集めて前方に照
    射させるとともに前方からの光を周縁部で集めて
    前記受光器に照射させる2焦点レンズと、この2
    焦点レンズの前方に煙感知用空間を挾んで配置し
    た再帰性反射板とを備えた減光式煙感知器。
JP1988028901U 1988-03-03 1988-03-03 Expired JPH0142229Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1988028901U JPH0142229Y2 (ja) 1988-03-03 1988-03-03

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988028901U JPH0142229Y2 (ja) 1988-03-03 1988-03-03

Publications (2)

Publication Number Publication Date
JPS63143996U true JPS63143996U (ja) 1988-09-21
JPH0142229Y2 JPH0142229Y2 (ja) 1989-12-11

Family

ID=30832295

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1988028901U Expired JPH0142229Y2 (ja) 1988-03-03 1988-03-03

Country Status (1)

Country Link
JP (1) JPH0142229Y2 (ja)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4858080U (ja) * 1971-11-08 1973-07-24
JPS5318179U (ja) * 1976-07-27 1978-02-16

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5318179B2 (ja) * 1973-11-17 1978-06-13

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4858080U (ja) * 1971-11-08 1973-07-24
JPS5318179U (ja) * 1976-07-27 1978-02-16

Also Published As

Publication number Publication date
JPH0142229Y2 (ja) 1989-12-11

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