JPS55462A - Optical scatter type smoke sensor - Google Patents

Optical scatter type smoke sensor

Info

Publication number
JPS55462A
JPS55462A JP1365279A JP1365279A JPS55462A JP S55462 A JPS55462 A JP S55462A JP 1365279 A JP1365279 A JP 1365279A JP 1365279 A JP1365279 A JP 1365279A JP S55462 A JPS55462 A JP S55462A
Authority
JP
Japan
Prior art keywords
dark box
smoke sensor
type smoke
members
optical scatter
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
JP1365279A
Other languages
Japanese (ja)
Other versions
JPH033277B2 (en
Inventor
Mitsuo Hasegawa
Yoshinori Shinohara
Takashi Suzuki
Akira Yokota
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nittan Co Ltd
Original Assignee
Nittan Co Ltd
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 Nittan Co Ltd filed Critical Nittan Co Ltd
Priority to JP1365279A priority Critical patent/JPS55462A/en
Publication of JPS55462A publication Critical patent/JPS55462A/en
Publication of JPH033277B2 publication Critical patent/JPH033277B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device
    • G08B17/107—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device for detecting light-scattering due to smoke
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas
    • G08B17/113—Constructional details

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Fire Alarms (AREA)

Abstract

PURPOSE:To improve the S/N ratio of a smoke sensor with the use of a simple construction by providing a plurality of such angular members on the peripheral wall of a dark box as are formed with bent vent holes having communications with the ambient air and as protrude inwardly. CONSTITUTION:Both a light source 3 and a light receiver 4, which is arranged at a position to receive no direct light from the light source 3, are attached integrally to a support 5 within a dark box 2 which is shielded in a cover 1. The peripheral wall of the dark box 2 is formed with a plurality of angular members 7 which are formed such bent vent holes 6 while protruding inwardly into the dark box 2 as can receive smoke. The wide angle of the troughs 8 which are formed of the members 7 is at least an acute angle, and the finish of the surface 9 is denser than about 800 meshes, if preferred.
JP1365279A 1979-02-08 1979-02-08 Optical scatter type smoke sensor Granted JPS55462A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1365279A JPS55462A (en) 1979-02-08 1979-02-08 Optical scatter type smoke sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1365279A JPS55462A (en) 1979-02-08 1979-02-08 Optical scatter type smoke sensor

Publications (2)

Publication Number Publication Date
JPS55462A true JPS55462A (en) 1980-01-05
JPH033277B2 JPH033277B2 (en) 1991-01-18

Family

ID=11839144

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1365279A Granted JPS55462A (en) 1979-02-08 1979-02-08 Optical scatter type smoke sensor

Country Status (1)

Country Link
JP (1) JPS55462A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0337592U (en) * 1989-08-24 1991-04-11
DE102006000271B4 (en) 2005-06-06 2018-06-21 Kabushiki Kaisha Toyota Jidoshokki Compression ignition internal combustion engine with homogeneous charge

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3681603A (en) * 1969-05-19 1972-08-01 Cerberus Ag Smoke detector with at least one smoke measuring chamber

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3681603A (en) * 1969-05-19 1972-08-01 Cerberus Ag Smoke detector with at least one smoke measuring chamber

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0337592U (en) * 1989-08-24 1991-04-11
DE102006000271B4 (en) 2005-06-06 2018-06-21 Kabushiki Kaisha Toyota Jidoshokki Compression ignition internal combustion engine with homogeneous charge

Also Published As

Publication number Publication date
JPH033277B2 (en) 1991-01-18

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