FR2104804B1 - - Google Patents

Info

Publication number
FR2104804B1
FR2104804B1 FR7127021A FR7127021A FR2104804B1 FR 2104804 B1 FR2104804 B1 FR 2104804B1 FR 7127021 A FR7127021 A FR 7127021A FR 7127021 A FR7127021 A FR 7127021A FR 2104804 B1 FR2104804 B1 FR 2104804B1
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
FR7127021A
Other languages
French (fr)
Other versions
FR2104804A1 (en
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of FR2104804A1 publication Critical patent/FR2104804A1/fr
Application granted granted Critical
Publication of FR2104804B1 publication Critical patent/FR2104804B1/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
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/01—Control of temperature without auxiliary power
    • G05D23/02—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature
    • G05D23/08—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature with bimetallic element
    • 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
    • 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

  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Health & Medical Sciences (AREA)
  • Automation & Control Theory (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Outer Garments And Coats (AREA)
  • Helmets And Other Head Coverings (AREA)
FR7127021A 1970-07-24 1971-07-23 Expired FR2104804B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE10237/70A SE335080B (en) 1970-07-24 1970-07-24

Publications (2)

Publication Number Publication Date
FR2104804A1 FR2104804A1 (en) 1972-04-21
FR2104804B1 true FR2104804B1 (en) 1975-07-11

Family

ID=20291970

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7127021A Expired FR2104804B1 (en) 1970-07-24 1971-07-23

Country Status (8)

Country Link
CH (1) CH539902A (en)
DE (1) DE2134563A1 (en)
DK (1) DK127616B (en)
FI (1) FI53521C (en)
FR (1) FR2104804B1 (en)
GB (1) GB1342266A (en)
NO (1) NO126936B (en)
SE (1) SE335080B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE7604502L (en) * 1976-04-15 1977-10-16 Ericsson Telefon Ab L M OPTICAL FIRE DETECTOR
GB2005404A (en) * 1977-09-26 1979-04-19 Bendix Corp "Dust Monitor"
GB2272760A (en) * 1992-11-20 1994-05-25 Thorn Security Optical detection of combustion products
CN107991236B (en) * 2017-12-04 2020-08-25 华北电力大学（保定） Microbial aerosol detection device
CN114018853B (en) * 2021-11-24 2024-03-26 青岛崂应海纳光电环保集团有限公司 Photometer air chamber and gas analysis module

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE494410A (en) *
GB715519A (en) * 1952-08-13 1954-09-15 Kidde Walter Co Ltd Method and apparatus for detection of smoke

Also Published As

Publication number Publication date
FI53521C (en) 1978-05-10
FR2104804A1 (en) 1972-04-21
GB1342266A (en) 1974-01-03
DK127616B (en) 1973-12-03
NO126936B (en) 1973-04-09
SE335080B (en) 1971-05-10
DE2134563A1 (en) 1972-01-27
CH539902A (en) 1973-07-31
FI53521B (en) 1978-01-31

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Legal Events

Date Code Title Description
ST Notification of lapse