GB9121111D0 - Light metering device - Google Patents

Light metering device

Info

Publication number
GB9121111D0
GB9121111D0 GB919121111A GB9121111A GB9121111D0 GB 9121111 D0 GB9121111 D0 GB 9121111D0 GB 919121111 A GB919121111 A GB 919121111A GB 9121111 A GB9121111 A GB 9121111A GB 9121111 D0 GB9121111 D0 GB 9121111D0
Authority
GB
United Kingdom
Prior art keywords
metering device
light metering
light
metering
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.)
Withdrawn
Application number
GB919121111A
Other versions
GB2261502A (en
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.)
VL Churchill Ltd
Original Assignee
VL Churchill 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 VL Churchill Ltd filed Critical VL Churchill Ltd
Priority to GB9121111A priority Critical patent/GB2261502A/en
Publication of GB9121111D0 publication Critical patent/GB9121111D0/en
Publication of GB2261502A publication Critical patent/GB2261502A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • G08B17/103—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
    • 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)
GB9121111A 1991-10-04 1991-10-04 Smoke detection device Withdrawn GB2261502A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9121111A GB2261502A (en) 1991-10-04 1991-10-04 Smoke detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9121111A GB2261502A (en) 1991-10-04 1991-10-04 Smoke detection device

Publications (2)

Publication Number Publication Date
GB9121111D0 true GB9121111D0 (en) 1991-11-13
GB2261502A GB2261502A (en) 1993-05-19

Family

ID=10702421

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9121111A Withdrawn GB2261502A (en) 1991-10-04 1991-10-04 Smoke detection device

Country Status (1)

Country Link
GB (1) GB2261502A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2343946A (en) * 1996-05-03 2000-05-24 Vision Products Pty Ltd Reduced contamination smoke detector
AUPN965996A0 (en) 1996-05-03 1996-05-30 Vision Products Pty Ltd The detection of airborne pollutants
FR2754347B1 (en) * 1996-10-09 1998-11-27 Seb Sa SMOKE DETECTION DEVICE FOR COOKING APPARATUS
GB2342987B (en) * 1998-10-20 2003-03-19 David Appleby Improved smoke sensor with a fault monitoring capability
GB2372099B (en) * 2001-02-08 2003-11-05 Status Scient Controls Ltd Gas sensor
KR102061714B1 (en) * 2009-07-07 2020-02-11 엑스트랄리스 테크놀로지 리미티드 Chamber condition

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3792272A (en) * 1973-01-12 1974-02-12 Omicron Syst Corp Breath test device for organic components, including alcohol
US3924252A (en) * 1973-03-15 1975-12-02 Espey Mfg & Electronics Corp Laser smoke detection
US3885162A (en) * 1973-10-31 1975-05-20 Contraves Goerz Corp Optical measuring apparatus
US4355897A (en) * 1977-12-27 1982-10-26 Beckman Instruments, Inc. Near-simultaneous measurements at forward and back scatter angles in light scattering photometers
US4346296A (en) * 1980-08-15 1982-08-24 Andros Analyzers Incorporated Non-dispersive infrared gas analyzer
US4632563A (en) * 1983-02-28 1986-12-30 The Syconex Corporation In-situ gas analyzer
DE3309838C2 (en) * 1983-03-18 1986-06-05 Erwin Sick Gmbh Optik-Elektronik, 7808 Waldkirch Optical transmission meter

Also Published As

Publication number Publication date
GB2261502A (en) 1993-05-19

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)