JPS4932581U - - Google Patents

Info

Publication number
JPS4932581U
JPS4932581U JP1972072536U JP7253672U JPS4932581U JP S4932581 U JPS4932581 U JP S4932581U JP 1972072536 U JP1972072536 U JP 1972072536U JP 7253672 U JP7253672 U JP 7253672U JP S4932581 U JPS4932581 U JP S4932581U
Authority
JP
Japan
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
JP1972072536U
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 JP1972072536U priority Critical patent/JPS4932581U/ja
Priority to GB2739073A priority patent/GB1400658A/en
Priority to FR7322489A priority patent/FR2189801B1/fr
Publication of JPS4932581U publication Critical patent/JPS4932581U/ja
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR 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
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
    • G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR 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)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
JP1972072536U 1972-06-21 1972-06-21 Pending JPS4932581U (ko)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP1972072536U JPS4932581U (ko) 1972-06-21 1972-06-21
GB2739073A GB1400658A (en) 1972-06-21 1973-06-08 Light scattering type smoke detector
FR7322489A FR2189801B1 (ko) 1972-06-21 1973-06-20

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1972072536U JPS4932581U (ko) 1972-06-21 1972-06-21

Publications (1)

Publication Number Publication Date
JPS4932581U true JPS4932581U (ko) 1974-03-22

Family

ID=13492157

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1972072536U Pending JPS4932581U (ko) 1972-06-21 1972-06-21

Country Status (3)

Country Link
JP (1) JPS4932581U (ko)
FR (1) FR2189801B1 (ko)
GB (1) GB1400658A (ko)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5144384U (ko) * 1974-09-28 1976-04-01

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2434178C2 (de) * 1974-07-16 1983-12-08 Matsushita Electric Works, Ltd., Kadoma, Osaka Rauchmeldegerät nach dem Lichtstreuprinzip
GB2272760A (en) * 1992-11-20 1994-05-25 Thorn Security Optical detection of combustion products
CN110148277B (zh) * 2019-04-20 2021-04-20 北京升哲科技有限公司 一种基于双波长检测的mems烟雾传感器

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5230954U (ko) * 1975-08-27 1977-03-04

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3383670A (en) * 1964-07-13 1968-05-14 Gordon A. Roberts Smoke and heat detection unit
US3505529A (en) * 1968-02-08 1970-04-07 Bliss Co Radiation sensitive smoke detecting device
DE1915906A1 (de) * 1968-04-03 1969-11-06 Berkeley Scient Lab Inc Rauchdetektor
US3708675A (en) * 1969-09-19 1973-01-02 Furukawa Electric Co Ltd Smoke detector in which air entrance and egress are located in oppositely disposed surfaces which are shaped to cause an air velocity differential

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5230954U (ko) * 1975-08-27 1977-03-04

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5144384U (ko) * 1974-09-28 1976-04-01

Also Published As

Publication number Publication date
GB1400658A (en) 1975-07-23
FR2189801A1 (ko) 1974-01-25
FR2189801B1 (ko) 1977-07-29

Similar Documents

Publication Publication Date Title
AU465353B2 (ko)
JPS5038645Y2 (ko)
RO59855A3 (ko)
CH563754A5 (ko)
CH577464A5 (ko)
BG18294A1 (ko)
BG18353A1 (ko)
BG18354A1 (ko)
BG18365A1 (ko)
BG18502A1 (ko)
BG22845A3 (ko)
CH171873A4 (ko)
BG18050A1 (ko)
CH551286A (ko)
BG17992A1 (ko)
CH559529A5 (ko)
CH560134A5 (ko)
CH560361A5 (ko)
CH561109A5 (ko)
CH562467A (ko)
CH563367A5 (ko)
CH563621A5 (ko)
CH563645A5 (ko)
CH563686A5 (ko)
CH559392A5 (ko)