AU509390B1 - Detecting + signalling dangerous gas in an atmosphere - Google Patents

Detecting + signalling dangerous gas in an atmosphere

Info

Publication number
AU509390B1
AU509390B1 AU49145/79A AU4914579A AU509390B1 AU 509390 B1 AU509390 B1 AU 509390B1 AU 49145/79 A AU49145/79 A AU 49145/79A AU 4914579 A AU4914579 A AU 4914579A AU 509390 B1 AU509390 B1 AU 509390B1
Authority
AU
Australia
Prior art keywords
signalling
atmosphere
detecting
dangerous gas
dangerous
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.)
Expired
Application number
AU49145/79A
Inventor
AL Gautier
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 AU49145/79A priority Critical patent/AU509390B1/en
Application granted granted Critical
Publication of AU509390B1 publication Critical patent/AU509390B1/en
Anticipated expiration legal-status Critical
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/14—Investigating 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
    • G01N27/16—Investigating 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display
    • G01N33/0063—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display using a threshold to release an alarm or displaying means
    • 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
    • G08B17/117—Actuation 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)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Immunology (AREA)
  • Food Science & Technology (AREA)
  • Combustion & Propulsion (AREA)
  • Medicinal Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
AU49145/79A 1979-07-23 1979-07-23 Detecting + signalling dangerous gas in an atmosphere Expired AU509390B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU49145/79A AU509390B1 (en) 1979-07-23 1979-07-23 Detecting + signalling dangerous gas in an atmosphere

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU49145/79A AU509390B1 (en) 1979-07-23 1979-07-23 Detecting + signalling dangerous gas in an atmosphere

Publications (1)

Publication Number Publication Date
AU509390B1 true AU509390B1 (en) 1980-05-08

Family

ID=3735873

Family Applications (1)

Application Number Title Priority Date Filing Date
AU49145/79A Expired AU509390B1 (en) 1979-07-23 1979-07-23 Detecting + signalling dangerous gas in an atmosphere

Country Status (1)

Country Link
AU (1) AU509390B1 (en)

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Legal Events

Date Code Title Description
MK14 Patent ceased section 143(a) (annual fees not paid) or expired