GB1321016A - Apparatus for detecting smoke dust or like matter - Google Patents

Apparatus for detecting smoke dust or like matter

Info

Publication number
GB1321016A
GB1321016A GB2089871A GB2089871A GB1321016A GB 1321016 A GB1321016 A GB 1321016A GB 2089871 A GB2089871 A GB 2089871A GB 2089871 A GB2089871 A GB 2089871A GB 1321016 A GB1321016 A GB 1321016A
Authority
GB
United Kingdom
Prior art keywords
gas
detector
duct
source
light beam
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
GB2089871A
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.)
European Atomic Energy Community Euratom
Original Assignee
European Atomic Energy Community Euratom
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 European Atomic Energy Community Euratom filed Critical European Atomic Energy Community Euratom
Publication of GB1321016A publication Critical patent/GB1321016A/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
    • G08B17/103—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

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

1321016 Smoke and dust detector EUROPEAN ATOMIC ENERGY COMMUNITY (EURATOM) 19 April 1971 [9 Feb 1970] 20898/71 Heading G1A In an apparatus for detecting smoke or dust particles in a gas, the gas is passed along a meandering path which crosses and recrosses a light beam travelling in a straight line from a source to a detector. In an embodiment comprising a light source 8 and a detector 9 at either end of an elongated duct 4 the meandering gas path is formed by a number of baffles 7 which have semicircular cut outs or slots, for the light beam and are arranged as shown. When the detectors output drops to below a predetermined but adjustable value an alarm is activated. The gas is sucked into the duct 4 via inlet 6 by means of a blower 2 and leaves via outlet 5. The light source may be monitored by means of a light guide 10 which by-passes the duct 4 to enable any variation in source output to be corrected automatically.
GB2089871A 1970-02-09 1971-04-19 Apparatus for detecting smoke dust or like matter Expired GB1321016A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702006371 DE2006371A1 (en) 1970-02-09 1970-02-09 Smoke detector

Publications (1)

Publication Number Publication Date
GB1321016A true GB1321016A (en) 1973-06-20

Family

ID=5762079

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2089871A Expired GB1321016A (en) 1970-02-09 1971-04-19 Apparatus for detecting smoke dust or like matter

Country Status (6)

Country Link
BE (1) BE761610A (en)
DE (1) DE2006371A1 (en)
FR (1) FR2078384A5 (en)
GB (1) GB1321016A (en)
LU (1) LU62557A1 (en)
NL (1) NL7100638A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2393782A (en) * 2002-08-22 2004-04-07 Hochiki Co Sampling tube-type smoke detector
CN101936880A (en) * 2009-06-29 2011-01-05 霍尼韦尔国际公司 Be used to monitor and control the circuit in the source of emittance in the smoke-detectors
CN103105356A (en) * 2011-11-15 2013-05-15 西门子公司 Danger detector for operation in nuclear field
US20130126508A1 (en) * 2011-11-17 2013-05-23 Texas Instruments Incorporated Extending Radiation Tolerance By Localized Temperature Annealing Of Semiconductor Devices

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2841315T3 (en) * 2018-07-17 2021-07-08 Schuetz Gmbh Messtechnik Mobile and portable gas sensing device, gas measurement procedure and use of gas sensing device

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2393782A (en) * 2002-08-22 2004-04-07 Hochiki Co Sampling tube-type smoke detector
GB2393782B (en) * 2002-08-22 2004-12-01 Hochiki Co Sampling tube-type smoke detector
US7062953B2 (en) 2002-08-22 2006-06-20 Hochiki Corporation Sampling tube-type smoke detector
CN101936880A (en) * 2009-06-29 2011-01-05 霍尼韦尔国际公司 Be used to monitor and control the circuit in the source of emittance in the smoke-detectors
EP2278568A1 (en) * 2009-06-29 2011-01-26 Honeywell International Inc. Circuitry to monitor and control source of radiant energy in smoke detector
EP2325821A1 (en) * 2009-06-29 2011-05-25 Honeywell International Inc. Circuitry to monitor and control source of radiant energy in smoke detector
US8289177B2 (en) 2009-06-29 2012-10-16 Honeywell International Inc. Circuitry to monitor and control source of radiant energy in smoke detector
CN101936880B (en) * 2009-06-29 2015-09-23 霍尼韦尔国际公司 The circuit in the source of for monitoring and controlling emittance in smoke-detectors
CN103105356A (en) * 2011-11-15 2013-05-15 西门子公司 Danger detector for operation in nuclear field
US8907801B2 (en) 2011-11-15 2014-12-09 Siemens Aktiengesellschaft Danger detector for operation in nuclear field, having heating system for heating typically non-radiation hardened semiconductor components to increase functional service life
US20130126508A1 (en) * 2011-11-17 2013-05-23 Texas Instruments Incorporated Extending Radiation Tolerance By Localized Temperature Annealing Of Semiconductor Devices

Also Published As

Publication number Publication date
DE2006371A1 (en) 1971-08-19
LU62557A1 (en) 1971-08-19
FR2078384A5 (en) 1971-11-05
BE761610A (en) 1971-06-16
NL7100638A (en) 1971-08-11

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees