FR2211128A5 - - Google Patents

Info

Publication number
FR2211128A5
FR2211128A5 FR7344023A FR7344023A FR2211128A5 FR 2211128 A5 FR2211128 A5 FR 2211128A5 FR 7344023 A FR7344023 A FR 7344023A FR 7344023 A FR7344023 A FR 7344023A FR 2211128 A5 FR2211128 A5 FR 2211128A5
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
FR7344023A
Other languages
French (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.)
Hochiki Corp
Original Assignee
Hochiki Corp
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 Hochiki Corp filed Critical Hochiki Corp
Application granted granted Critical
Publication of FR2211128A5 publication Critical patent/FR2211128A5/fr
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G08B17/103—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

Landscapes

  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Management (AREA)
  • Business, Economics & Management (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)
FR7344023A 1972-12-14 1973-12-10 Expired FR2211128A5 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1972142726U JPS5545506Y2 (es) 1972-12-14 1972-12-14

Publications (1)

Publication Number Publication Date
FR2211128A5 true FR2211128A5 (es) 1974-07-12

Family

ID=15322143

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7344023A Expired FR2211128A5 (es) 1972-12-14 1973-12-10

Country Status (6)

Country Link
US (1) US3887815A (es)
JP (1) JPS5545506Y2 (es)
CH (1) CH563630A5 (es)
DE (1) DE2361403C3 (es)
FR (1) FR2211128A5 (es)
GB (1) GB1417790A (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2420173A1 (fr) * 1978-03-13 1979-10-12 American District Telegraph Co Dispositif de detection d'une condition d'alarme

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH568627A5 (es) * 1974-07-15 1975-10-31 Cerberus Ag
US4198627A (en) * 1977-07-12 1980-04-15 Cybernet Electronics Corporation Photoelectric synchronous smoke sensor
US4125779A (en) * 1977-07-13 1978-11-14 Chloride, Incorporated Smoke detector

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3702447A (en) * 1968-07-01 1972-11-07 Xerox Corp Electronic chopper system for use in facsimile communication comprising means for alternately grounding and ungrounding inputs of amplifier
US3655289A (en) * 1971-01-22 1972-04-11 Susquehanna Corp Opacity meter with noise suppression
GB1409653A (en) * 1971-09-23 1975-10-08 Masson Scott Thrissell Eng Ltd Methods and apparatus for inspecting the surface of sheet material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2420173A1 (fr) * 1978-03-13 1979-10-12 American District Telegraph Co Dispositif de detection d'une condition d'alarme

Also Published As

Publication number Publication date
DE2361403C3 (de) 1975-08-21
US3887815A (en) 1975-06-03
CH563630A5 (es) 1975-06-30
JPS5545506Y2 (es) 1980-10-24
JPS4996891U (es) 1974-08-21
DE2361403B2 (de) 1975-01-09
GB1417790A (en) 1975-12-17
DE2361403A1 (de) 1974-06-27

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Legal Events

Date Code Title Description
ST Notification of lapse