NL7411700A - New method of fire detection in mines - obtains continuous measurement of carbon dioxide concentration gives alarm when given value is exceeded - Google Patents

New method of fire detection in mines - obtains continuous measurement of carbon dioxide concentration gives alarm when given value is exceeded

Info

Publication number
NL7411700A
NL7411700A NL7411700A NL7411700A NL7411700A NL 7411700 A NL7411700 A NL 7411700A NL 7411700 A NL7411700 A NL 7411700A NL 7411700 A NL7411700 A NL 7411700A NL 7411700 A NL7411700 A NL 7411700A
Authority
NL
Netherlands
Prior art keywords
carbon dioxide
exceeded
continuous measurement
mines
dioxide concentration
Prior art date
Application number
NL7411700A
Other languages
Dutch (nl)
Original Assignee
Anglo Amer Corp South Africa
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 Anglo Amer Corp South Africa filed Critical Anglo Amer Corp South Africa
Priority to NL7411700A priority Critical patent/NL7411700A/en
Publication of NL7411700A publication Critical patent/NL7411700A/en

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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

Continuous measurement of carbon dioxide concentration is made. When the measurements indicate a predetermined concentration has been exceeded an alarm is given. The alarm is also given when the gas concentration rate of change exceeds a predetermined value. The alarm system is actuated by sensitive detection which respond when gas concentration exceeds the predetermined value, and when the rate of change of gas concentration exceeds a predetermined value. The method works on the principle that the carbon dioxide gas concentration in the mine atmosphere increases very rapidly during the initial stages of a fire.
NL7411700A 1974-09-03 1974-09-03 New method of fire detection in mines - obtains continuous measurement of carbon dioxide concentration gives alarm when given value is exceeded NL7411700A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL7411700A NL7411700A (en) 1974-09-03 1974-09-03 New method of fire detection in mines - obtains continuous measurement of carbon dioxide concentration gives alarm when given value is exceeded

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7411700A NL7411700A (en) 1974-09-03 1974-09-03 New method of fire detection in mines - obtains continuous measurement of carbon dioxide concentration gives alarm when given value is exceeded

Publications (1)

Publication Number Publication Date
NL7411700A true NL7411700A (en) 1976-03-05

Family

ID=19822021

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7411700A NL7411700A (en) 1974-09-03 1974-09-03 New method of fire detection in mines - obtains continuous measurement of carbon dioxide concentration gives alarm when given value is exceeded

Country Status (1)

Country Link
NL (1) NL7411700A (en)

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