ZA777399B - Improved electrical circuitry for detecting a combustible mixture of gas in a mine atmosphere - Google Patents

Improved electrical circuitry for detecting a combustible mixture of gas in a mine atmosphere

Info

Publication number
ZA777399B
ZA777399B ZA00777399A ZA777399A ZA777399B ZA 777399 B ZA777399 B ZA 777399B ZA 00777399 A ZA00777399 A ZA 00777399A ZA 777399 A ZA777399 A ZA 777399A ZA 777399 B ZA777399 B ZA 777399B
Authority
ZA
South Africa
Prior art keywords
detecting
gas
electrical circuitry
combustible mixture
improved electrical
Prior art date
Application number
ZA00777399A
Inventor
H Hadi
J Burr
Original Assignee
Consolidation Coal Co
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
Priority claimed from US05/750,877 external-priority patent/US4064498A/en
Application filed by Consolidation Coal Co filed Critical Consolidation Coal Co
Publication of ZA777399B publication Critical patent/ZA777399B/en

Links

Classifications

    • 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
    • G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
    • G01N33/0031—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array
    • 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
    • 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
ZA00777399A 1976-12-15 1977-12-12 Improved electrical circuitry for detecting a combustible mixture of gas in a mine atmosphere ZA777399B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/750,877 US4064498A (en) 1975-10-28 1976-12-15 Electrical circuitry for detecting a combustible mixture of gas in a mine atmosphere

Publications (1)

Publication Number Publication Date
ZA777399B true ZA777399B (en) 1978-10-25

Family

ID=25019511

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00777399A ZA777399B (en) 1976-12-15 1977-12-12 Improved electrical circuitry for detecting a combustible mixture of gas in a mine atmosphere

Country Status (5)

Country Link
AU (1) AU510944B2 (en)
DE (1) DE2755337A1 (en)
FR (1) FR2374637A2 (en)
GB (1) GB1592506A (en)
ZA (1) ZA777399B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3126864C2 (en) * 1981-07-08 1986-01-02 Rheinische Braunkohlenwerke AG, 5000 Köln Process for the early detection of smoldering fires in containers containing lignite dust
DE3132297C2 (en) * 1981-08-12 1985-05-15 Auergesellschaft Gmbh, 1000 Berlin Circuit arrangement for a device for measuring and displaying the concentration of flammable gases and vapors contained in air
US4465318A (en) * 1981-10-13 1984-08-14 Coal Industry (Patents) Limited Rotary cutting head for mining machines with means for inducing airflow and sensing thereof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1579535A (en) * 1968-03-21 1969-08-29
BE762753A (en) * 1971-02-10 1971-07-16 Inst Tekhn Teplofiziki Akademi Measurement of combustible gas and vapour concentration
GB1419361A (en) * 1974-03-26 1975-12-31 Gen Monitors Multi-channel combustible gas detector
DE2457650A1 (en) * 1974-12-06 1976-06-10 Bosch Gmbh Robert DEVICE FOR CHECKING GASES

Also Published As

Publication number Publication date
GB1592506A (en) 1981-07-08
FR2374637B2 (en) 1984-09-14
AU510944B2 (en) 1980-07-24
DE2755337A1 (en) 1978-06-22
AU3124877A (en) 1979-06-14
FR2374637A2 (en) 1978-07-13

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