GB2054156B - Apparatus for detecting and signalling the presence of a dangerous gas in an atmosphere - Google Patents

Apparatus for detecting and signalling the presence of a dangerous gas in an atmosphere

Info

Publication number
GB2054156B
GB2054156B GB7924956A GB7924956A GB2054156B GB 2054156 B GB2054156 B GB 2054156B GB 7924956 A GB7924956 A GB 7924956A GB 7924956 A GB7924956 A GB 7924956A GB 2054156 B GB2054156 B GB 2054156B
Authority
GB
United Kingdom
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
GB7924956A
Other versions
GB2054156A (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.)
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 GB7924956A priority Critical patent/GB2054156B/en
Publication of GB2054156A publication Critical patent/GB2054156A/en
Application granted granted Critical
Publication of GB2054156B publication Critical patent/GB2054156B/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04—Parts, details or accessories of helmets
    • A42B3/0406—Accessories for helmets
    • A42B3/0433—Detecting, signalling or lighting devices
    • A42B3/046—Means for detecting hazards or accidents
    • 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, e.g. intermittent, or the display, e.g. digital
    • G01N33/0063—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method, e.g. intermittent, or the display, e.g. digital using a threshold to release an alarm or displaying means
GB7924956A 1979-07-18 1979-07-18 Apparatus for detecting and signalling the presence of a dangerous gas in an atmosphere Expired GB2054156B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7924956A GB2054156B (en) 1979-07-18 1979-07-18 Apparatus for detecting and signalling the presence of a dangerous gas in an atmosphere

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7924956A GB2054156B (en) 1979-07-18 1979-07-18 Apparatus for detecting and signalling the presence of a dangerous gas in an atmosphere

Publications (2)

Publication Number Publication Date
GB2054156A GB2054156A (en) 1981-02-11
GB2054156B true GB2054156B (en) 1984-02-29

Family

ID=10506568

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7924956A Expired GB2054156B (en) 1979-07-18 1979-07-18 Apparatus for detecting and signalling the presence of a dangerous gas in an atmosphere

Country Status (1)

Country Link
GB (1) GB2054156B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES1002399Y (en) * 1987-05-11 1989-01-16 Suministros Adaro, S.A. MODULAR AND PORTABLE SAFETY DEVICE FOR INDIVIDUAL USE BY MINERS
US7563001B2 (en) * 2006-08-01 2009-07-21 Koehler-Bright Star, Inc. Module adapter for portable light sources
DE102008023523B4 (en) * 2008-05-15 2019-08-08 Dräger Safety AG & Co. KGaA Safety garment and security system

Also Published As

Publication number Publication date
GB2054156A (en) 1981-02-11

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Effective date: 19990717