FR2141655B1 - - Google Patents

Info

Publication number
FR2141655B1
FR2141655B1 FR717147163A FR7147163A FR2141655B1 FR 2141655 B1 FR2141655 B1 FR 2141655B1 FR 717147163 A FR717147163 A FR 717147163A FR 7147163 A FR7147163 A FR 7147163A FR 2141655 B1 FR2141655 B1 FR 2141655B1
Authority
FR
France
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.)
Expired
Application number
FR717147163A
Other versions
FR2141655A1 (fr
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.)
Electro Signal Lab Inc
Original Assignee
Electro Signal Lab Inc
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 Electro Signal Lab Inc filed Critical Electro Signal Lab Inc
Publication of FR2141655A1 publication Critical patent/FR2141655A1/fr
Application granted granted Critical
Publication of FR2141655B1 publication Critical patent/FR2141655B1/fr
Expired 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/06—Illumination; Optics
    • G01N2201/063—Illuminating optical parts
    • G01N2201/0638—Refractive parts
    • G01N2201/0639—Sphere lens

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)
  • Optical Measuring Cells (AREA)
FR717147163A 1971-06-03 1971-12-28 Expired FR2141655B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US14963771A 1971-06-03 1971-06-03

Publications (2)

Publication Number Publication Date
FR2141655A1 FR2141655A1 (fr) 1973-01-26
FR2141655B1 true FR2141655B1 (fr) 1973-07-13

Family

ID=22531192

Family Applications (1)

Application Number Title Priority Date Filing Date
FR717147163A Expired FR2141655B1 (fr) 1971-06-03 1971-12-28

Country Status (6)

Country Link
US (1) US3723747A (fr)
CA (1) CA963122A (fr)
DE (1) DE2165697A1 (fr)
FR (1) FR2141655B1 (fr)
GB (1) GB1370811A (fr)
IT (1) IT942068B (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1439129A (en) * 1972-09-21 1976-06-09 Ferranti Ltd Detection of blemishes in surfaces
JPS49148088U (fr) * 1973-04-20 1974-12-20
US3863076A (en) * 1973-07-24 1975-01-28 Electro Signal Lab Optical smoke detector
JPS5092181A (fr) * 1973-12-13 1975-07-23
JPS50134172A (fr) * 1974-04-17 1975-10-24
US3936814A (en) * 1974-04-29 1976-02-03 Bernz-O-Matic Corporation Smoke detector and alarm
US4114177A (en) * 1975-05-01 1978-09-12 Bell Telephone Laboratories, Incorporated Optically coupled device with diffusely reflecting enclosure
DK237780A (da) * 1979-06-19 1980-12-20 Secon Co Ltd Roegdetektor
GB2123548B (en) * 1982-07-14 1985-09-04 Chloride Group Plc Suspended particle detector
TW566634U (en) * 2002-05-13 2003-12-11 Prec Instr Developement Ct Nat Sensitivity adjustment device of photoelectric smoke detector
BRPI0714784A2 (pt) * 2006-08-02 2013-07-30 Awareness Technology Inc luminâmetro e mÉtodo de seletivamente mover transportador e mÉtodo de calibraÇço do luminâmetro

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1968816A (en) * 1930-07-18 1934-08-07 Sewell M Corbett Meter for quantitatively determining the amount of foreign matter in air
US2510347A (en) * 1945-10-19 1950-06-06 Rca Corp Photoelectric comparator having two bridge circuits
US2519081A (en) * 1949-01-07 1950-08-15 Standard Oil Dev Co Process and apparatus for determining rate of composition change
US2791932A (en) * 1953-07-30 1957-05-14 Specialties Dev Corp Light responsive apparatus for detecting suspended matter in a fluid
US2967946A (en) * 1957-10-31 1961-01-10 Standard Oil Co Light transmissivity control instrument
US3439178A (en) * 1965-02-08 1969-04-15 Owens Illinois Inc Radiation-sensitive apparatus for inspecting wall thickness of hollow containers
US3365661A (en) * 1965-04-26 1968-01-23 Anaconda Wire & Cable Co Method and apparatus for locating leaks in a cable by determining the distance to a short circuit in the cable
GB1227941A (fr) * 1967-03-16 1971-04-15
US3505529A (en) * 1968-02-08 1970-04-07 Bliss Co Radiation sensitive smoke detecting device
US3518437A (en) * 1968-03-20 1970-06-30 Shell Oil Co Apparatus for measuring haze in flowing liquids utilizing an operational amplifier with photosensitive feedback and input resistors for computing the ratio of scattered to directly transmitted light

Also Published As

Publication number Publication date
IT942068B (it) 1973-03-20
FR2141655A1 (fr) 1973-01-26
GB1370811A (en) 1974-10-16
DE2165697A1 (de) 1972-12-14
CA963122A (en) 1975-02-18
US3723747A (en) 1973-03-27

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Legal Events

Date Code Title Description
ST Notification of lapse