Classifications

• • G—PHYSICS
  • G08—SIGNALLING
  • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
  • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
  • G08B29/18—Prevention or correction of operating errors
  • G08B29/20—Calibration, including self-calibrating arrangements
  • G08B29/24—Self-calibration, e.g. compensating for environmental drift or ageing of components
• • 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
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
  • G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
  • G01P5/10—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring thermal variables
  • G01P5/12—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring thermal variables using variation of resistance of a heated conductor
• • 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
  • G08B17/107—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 for detecting light-scattering due to smoke
• • 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
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N2201/00—Features of devices classified in G01N21/00
  • G01N2201/06—Illumination; Optics
  • G01N2201/064—Stray light conditioning
  • G01N2201/0642—Light traps; baffles

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Analytical Chemistry (AREA)
• Chemical & Material Sciences (AREA)
• Emergency Management (AREA)
• Business, Economics & Management (AREA)
• Engineering & Computer Science (AREA)
• Biochemistry (AREA)
• Life Sciences & Earth Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Immunology (AREA)
• Pathology (AREA)
• Aviation & Aerospace Engineering (AREA)
• Health & Medical Sciences (AREA)
• Computer Security & Cryptography (AREA)
• Fire-Detection Mechanisms (AREA)
• Investigating Or Analysing Materials By Optical Means (AREA)
• Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
• Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=10739687

Family Applications (3)

Family Applications Before (2)

Country Status (8)

Families Citing this family (30)

Family Cites Families (18)

• 1993
  • 1993-07-30 GB GB939315779A patent/GB9315779D0/en active Pending
• 1994
  • 1994-08-01 AU AU72694/94A patent/AU689484C/en not_active Withdrawn - After Issue
  • 1994-08-01 DE DE69434352T patent/DE69434352T2/de not_active Expired - Fee Related
  • 1994-08-01 EP EP94922971A patent/EP0712522B1/de not_active Expired - Lifetime
  • 1994-08-01 US US08/592,404 patent/US5917417A/en not_active Expired - Lifetime
  • 1994-08-01 AT AT97116861T patent/ATE245297T1/de not_active IP Right Cessation
  • 1994-08-01 AT AT94922971T patent/ATE180345T1/de not_active IP Right Cessation
  • 1994-08-01 DE DE69432958T patent/DE69432958T2/de not_active Expired - Lifetime
  • 1994-08-01 WO PCT/GB1994/001680 patent/WO1995004338A2/en active IP Right Grant
  • 1994-08-01 EP EP03006159A patent/EP1326221B1/de not_active Expired - Lifetime
  • 1994-08-01 EP EP97116861A patent/EP0825575B1/de not_active Expired - Lifetime
  • 1994-08-01 DE DE69418607T patent/DE69418607T2/de not_active Expired - Lifetime
  • 1994-08-01 AT AT03006159T patent/ATE293820T1/de not_active IP Right Cessation
  • 1994-08-01 ES ES03006159T patent/ES2240874T3/es not_active Expired - Lifetime

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