GB2230853B - Photoelectric smoke sensor - Google Patents

Photoelectric smoke sensor

Info

Publication number
GB2230853B
GB2230853B GB9004603A GB9004603A GB2230853B GB 2230853 B GB2230853 B GB 2230853B GB 9004603 A GB9004603 A GB 9004603A GB 9004603 A GB9004603 A GB 9004603A GB 2230853 B GB2230853 B GB 2230853B
Authority
GB
United Kingdom
Prior art keywords
smoke sensor
photoelectric smoke
photoelectric
sensor
smoke
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 - Lifetime
Application number
GB9004603A
Other versions
GB2230853A (en
GB9004603D0 (en
Inventor
Takashi Suzuki
Katsuhiro Akimoto
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.)
Nittan Co Ltd
Original Assignee
Nittan Co 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 Nittan Co Ltd filed Critical Nittan Co Ltd
Publication of GB9004603D0 publication Critical patent/GB9004603D0/en
Publication of GB2230853A publication Critical patent/GB2230853A/en
Application granted granted Critical
Publication of GB2230853B publication Critical patent/GB2230853B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Fire-Detection Mechanisms (AREA)
GB9004603A 1989-03-23 1990-03-01 Photoelectric smoke sensor Expired - Lifetime GB2230853B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1989032146U JPH02123691U (en) 1989-03-23 1989-03-23

Publications (3)

Publication Number Publication Date
GB9004603D0 GB9004603D0 (en) 1990-04-25
GB2230853A GB2230853A (en) 1990-10-31
GB2230853B true GB2230853B (en) 1993-03-17

Family

ID=12350762

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9004603A Expired - Lifetime GB2230853B (en) 1989-03-23 1990-03-01 Photoelectric smoke sensor

Country Status (2)

Country Link
JP (1) JPH02123691U (en)
GB (1) GB2230853B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06288917A (en) * 1993-03-31 1994-10-18 Nohmi Bosai Ltd Smoke detection type fire sensor
DE19902319B4 (en) * 1999-01-21 2011-06-30 Novar GmbH, Albstadt-Ebingen Zweigniederlassung Neuss, 41469 Scattered light fire detectors

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1172354A (en) * 1966-02-16 1969-11-26 Pyrene Co Ltd Improvements relating to Smoke Detectors
US3879718A (en) * 1970-09-16 1975-04-22 Gordon A Roberts Smoke detection unit with dual purpose alarm circuit
GB1529473A (en) * 1974-11-27 1978-10-18 Chloride Batterijen Bv Photo-responsive detectors
US4249169A (en) * 1979-05-18 1981-02-03 Malinowski William J Optical smoke detector
GB2090970A (en) * 1980-11-24 1982-07-21 Malinowski William John Temperature compensation in optical smoke detectors
EP0140502A1 (en) * 1983-08-12 1985-05-08 Martin Terence Cole Improvements relating to smoke detection apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61285598A (en) * 1985-06-11 1986-12-16 八洲電機株式会社 Smoke sensor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1172354A (en) * 1966-02-16 1969-11-26 Pyrene Co Ltd Improvements relating to Smoke Detectors
US3879718A (en) * 1970-09-16 1975-04-22 Gordon A Roberts Smoke detection unit with dual purpose alarm circuit
GB1529473A (en) * 1974-11-27 1978-10-18 Chloride Batterijen Bv Photo-responsive detectors
US4249169A (en) * 1979-05-18 1981-02-03 Malinowski William J Optical smoke detector
GB2090970A (en) * 1980-11-24 1982-07-21 Malinowski William John Temperature compensation in optical smoke detectors
EP0140502A1 (en) * 1983-08-12 1985-05-08 Martin Terence Cole Improvements relating to smoke detection apparatus

Also Published As

Publication number Publication date
GB2230853A (en) 1990-10-31
GB9004603D0 (en) 1990-04-25
JPH02123691U (en) 1990-10-11

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20100228