CH539902A - Smoke detector for the optical determination of the aerosols generated during fires - Google Patents

Smoke detector for the optical determination of the aerosols generated during fires

Info

Publication number
CH539902A
CH539902A CH1085671A CH1085671A CH539902A CH 539902 A CH539902 A CH 539902A CH 1085671 A CH1085671 A CH 1085671A CH 1085671 A CH1085671 A CH 1085671A CH 539902 A CH539902 A CH 539902A
Authority
CH
Switzerland
Prior art keywords
generated during
smoke detector
optical determination
aerosols generated
during fires
Prior art date
Application number
CH1085671A
Other languages
German (de)
Inventor
Gustaf Lindgren Erik
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of CH539902A publication Critical patent/CH539902A/en

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)
CH1085671A 1970-07-24 1971-07-23 Smoke detector for the optical determination of the aerosols generated during fires CH539902A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
CH539902A true CH539902A (en) 1973-07-31

Family

ID=20291970

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1085671A CH539902A (en) 1970-07-24 1971-07-23 Smoke detector for the optical determination of the aerosols generated during fires

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
FR2104804B1 (en) 1975-07-11
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
FI53521B (en) 1978-01-31

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Legal Events

Date Code Title Description
PL Patent ceased