FR2475733A1 - Detecteur de la presence d'un gaz combustible, notamment de methane - Google Patents

Detecteur de la presence d'un gaz combustible, notamment de methane Download PDF

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Publication number
FR2475733A1
FR2475733A1 FR8002914A FR8002914A FR2475733A1 FR 2475733 A1 FR2475733 A1 FR 2475733A1 FR 8002914 A FR8002914 A FR 8002914A FR 8002914 A FR8002914 A FR 8002914A FR 2475733 A1 FR2475733 A1 FR 2475733A1
Authority
FR
France
Prior art keywords
filament
bridge
detector
combustible gas
bridges
Prior art date
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.)
Granted
Application number
FR8002914A
Other languages
English (en)
French (fr)
Other versions
FR2475733B1 (show.php
Inventor
Pierre Gesippe
Jean-Claude Delchambre
Arthur Gabez
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.)
Oldham France SA
Original Assignee
Oldham France SA
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 Oldham France SA filed Critical Oldham France SA
Priority to FR8002914A priority Critical patent/FR2475733A1/fr
Publication of FR2475733A1 publication Critical patent/FR2475733A1/fr
Application granted granted Critical
Publication of FR2475733B1 publication Critical patent/FR2475733B1/fr
Granted legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/14Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature
    • G01N27/16Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature caused by burning or catalytic oxidation of surrounding material to be tested, e.g. of gas
    • GPHYSICS
    • G08SIGNALLING
    • G08BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00Fire alarms; Alarms responsive to explosion
    • G08B17/10Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/117Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means by using a detection device for specific gases, e.g. combustion products, produced by the fire

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Biochemistry (AREA)
  • Electrochemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
FR8002914A 1980-02-11 1980-02-11 Detecteur de la presence d'un gaz combustible, notamment de methane Granted FR2475733A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8002914A FR2475733A1 (fr) 1980-02-11 1980-02-11 Detecteur de la presence d'un gaz combustible, notamment de methane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8002914A FR2475733A1 (fr) 1980-02-11 1980-02-11 Detecteur de la presence d'un gaz combustible, notamment de methane

Publications (2)

Publication Number Publication Date
FR2475733A1 true FR2475733A1 (fr) 1981-08-14
FR2475733B1 FR2475733B1 (show.php) 1983-08-12

Family

ID=9238429

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8002914A Granted FR2475733A1 (fr) 1980-02-11 1980-02-11 Detecteur de la presence d'un gaz combustible, notamment de methane

Country Status (1)

Country Link
FR (1) FR2475733A1 (show.php)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3147465A (en) * 1960-12-27 1964-09-01 Mine Safety Appliances Co Methane alarm and control system
US3209343A (en) * 1961-12-11 1965-09-28 Nat Lead Co Multi-station gas detecting apparatus
BE688266A (show.php) * 1966-10-14 1967-03-16
GB1548308A (en) * 1976-11-02 1979-07-11 Redding R J Analysis instruments

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3147465A (en) * 1960-12-27 1964-09-01 Mine Safety Appliances Co Methane alarm and control system
US3209343A (en) * 1961-12-11 1965-09-28 Nat Lead Co Multi-station gas detecting apparatus
BE688266A (show.php) * 1966-10-14 1967-03-16
GB1548308A (en) * 1976-11-02 1979-07-11 Redding R J Analysis instruments

Also Published As

Publication number Publication date
FR2475733B1 (show.php) 1983-08-12

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