DK137293C - - Google Patents

Info

Publication number
DK137293C
DK137293C DK497973A DK497973A DK137293C DK 137293 C DK137293 C DK 137293C DK 497973 A DK497973 A DK 497973A DK 497973 A DK497973 A DK 497973A DK 137293 C DK137293 C DK 137293C
Authority
DK
Denmark
Application number
DK497973A
Other languages
Danish (da)
Other versions
DK137293B (en
Inventor
Q S Anderson
Original Assignee
Anglo American Corporation Of South Africa Ltd
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 American Corporation Of South Africa Ltd filed Critical Anglo American Corporation Of South Africa Ltd
Publication of DK137293B publication Critical patent/DK137293B/en
Application granted granted Critical
Publication of DK137293C publication Critical patent/DK137293C/da

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
    • G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
    • G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
    • G01N21/534—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke by measuring transmission alone, i.e. determining opacity
    • 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
    • G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas
    • G08B17/113—Constructional details

Landscapes

  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
DK497973AA 1972-09-13 1973-09-11 Fire Detector. DK137293B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA726258A ZA726258B (en) 1972-09-13 1972-09-13 Fire detector

Publications (2)

Publication Number Publication Date
DK137293B DK137293B (en) 1978-02-13
DK137293C true DK137293C (en) 1978-07-10

Family

ID=25565379

Family Applications (1)

Application Number Title Priority Date Filing Date
DK497973AA DK137293B (en) 1972-09-13 1973-09-11 Fire Detector.

Country Status (8)

Country Link
US (1) US3921158A (en)
JP (1) JPS4969099A (en)
CA (1) CA1015042A (en)
DE (1) DE2346249C3 (en)
DK (1) DK137293B (en)
FR (1) FR2199150B1 (en)
GB (1) GB1436405A (en)
ZA (1) ZA726258B (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5193499U (en) * 1975-01-24 1976-07-27
GB8309211D0 (en) * 1983-04-05 1983-05-11 Edinburgh Instr Infra red absorption gas detectors
GB8515519D0 (en) * 1985-06-19 1985-07-24 Graviner Ltd Gas detection
GB9616809D0 (en) * 1996-08-10 1996-09-25 Eev Ltd Gas monitors
EP1087352A1 (en) * 1999-09-22 2001-03-28 Siemens Building Technologies AG Optical smoke detector
US6876305B2 (en) * 1999-12-08 2005-04-05 Gentex Corporation Compact particle sensor
DE10031555B4 (en) * 2000-06-28 2010-04-15 Robert Bosch Gmbh Optical sensor
AU2003268142A1 (en) * 2002-08-23 2004-03-11 General Electric Company Rapidly responding, false detection immune alarm signal producing smoke detector
US7564365B2 (en) * 2002-08-23 2009-07-21 Ge Security, Inc. Smoke detector and method of detecting smoke
CN103150590A (en) * 2013-03-16 2013-06-12 赵明 Positioning card for mine personnel
DE102013212512A1 (en) * 2013-06-27 2015-01-15 Robert Bosch Gmbh Outer part for a device and device
CN103343701B (en) * 2013-07-23 2018-09-21 北京圣博亚科技有限公司 A kind of subsurface environment monitoring and warning system and its intelligence sensor
DE102014019172B4 (en) 2014-12-17 2023-12-07 Elmos Semiconductor Se Device and method for distinguishing between solid objects, cooking fumes and smoke using a compensating optical measuring system
DE102014019773B4 (en) 2014-12-17 2023-12-07 Elmos Semiconductor Se Device and method for distinguishing between solid objects, cooking fumes and smoke using the display of a mobile telephone
CN105089700A (en) * 2015-08-10 2015-11-25 苏州欧可罗电子科技有限公司 Mining safety monitoring system
CN107829780B (en) * 2017-10-27 2019-11-05 精英数智科技股份有限公司 A kind of gas false alarm recognition methods based on coal mine safety monitoring networked system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1695031A (en) * 1925-09-01 1928-12-11 Siemens Ag Determining gaseous carbonic acid
US2170435A (en) * 1937-12-14 1939-08-22 Standard Oil Dev Co Gas analysis apparatus
US3102257A (en) * 1958-07-21 1963-08-27 John M Miller Gas warning device
US3279308A (en) * 1963-12-02 1966-10-18 Dow Chemical Co Dispersive analyzer having means for segregating different wavelengths of radiation from a single source
US3435209A (en) * 1966-03-10 1969-03-25 Beckman Instruments Inc Two wavelength infrared analyzer having a pair of variable interference filters for determining the respective wavelengths
US3539770A (en) * 1967-11-14 1970-11-10 Barber Mfg Co Electric infrared heater
US3621200A (en) * 1968-10-31 1971-11-16 American Packaging Corp Heating element and packaging machine equipped therewith
US3677652A (en) * 1971-06-15 1972-07-18 Gte Sylvania Inc Fluid analyzer apparatus

Also Published As

Publication number Publication date
FR2199150A1 (en) 1974-04-05
DE2346249B2 (en) 1977-09-15
ZA726258B (en) 1973-11-28
GB1436405A (en) 1976-05-19
FR2199150B1 (en) 1977-05-20
US3921158A (en) 1975-11-18
DE2346249A1 (en) 1974-03-21
AU6025073A (en) 1975-03-13
DE2346249C3 (en) 1978-05-03
DK137293B (en) 1978-02-13
CA1015042A (en) 1977-08-02
JPS4969099A (en) 1974-07-04

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