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GB8615548D0 - Smoke detectors - Google Patents

Smoke detectors

Info

Publication number
GB8615548D0
GB8615548D0 GB868615548A GB8615548A GB8615548D0 GB 8615548 D0 GB8615548 D0 GB 8615548D0 GB 868615548 A GB868615548 A GB 868615548A GB 8615548 A GB8615548 A GB 8615548A GB 8615548 D0 GB8615548 D0 GB 8615548D0
Authority
GB
United Kingdom
Prior art keywords
smoke detectors
detectors
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.)
Granted
Application number
GB868615548A
Other versions
GB2177505B (en
GB2177505A (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.)
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 GB8615548D0 publication Critical patent/GB8615548D0/en
Publication of GB2177505A publication Critical patent/GB2177505A/en
Application granted granted Critical
Publication of GB2177505B publication Critical patent/GB2177505B/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
    • 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

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
GB8615548A 1985-07-03 1986-06-25 Photoelectric smoke detectors Expired GB2177505B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60144658A JPS626144A (en) 1985-07-03 1985-07-03 Photoelectric type smoke sensor

Publications (3)

Publication Number Publication Date
GB8615548D0 true GB8615548D0 (en) 1986-07-30
GB2177505A GB2177505A (en) 1987-01-21
GB2177505B GB2177505B (en) 1989-07-12

Family

ID=15367211

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8615548A Expired GB2177505B (en) 1985-07-03 1986-06-25 Photoelectric smoke detectors

Country Status (2)

Country Link
JP (1) JPS626144A (en)
GB (1) GB2177505B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3330438B2 (en) * 1993-12-16 2002-09-30 能美防災株式会社 Smoke detector and its adjusting device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1434658A (en) * 1972-12-27 1976-05-05 Electro Signal Lab Optical particle detectors with light scattering test device
JPS50134172A (en) * 1974-04-17 1975-10-24
US4216377A (en) * 1977-06-27 1980-08-05 Nittan Company, Limited Light scattering smoke detector
AU516023B2 (en) * 1977-11-29 1981-05-14 Chloride Inc Smoke detector
US4488049A (en) * 1981-11-09 1984-12-11 American District Telegraph Company Moving wall test device in optical smoke detectors
CH656474A5 (en) * 1981-11-11 1986-06-30 Cerberus Ag SMOKE DETECTOR.

Also Published As

Publication number Publication date
JPS626144A (en) 1987-01-13
GB2177505B (en) 1989-07-12
GB2177505A (en) 1987-01-21
JPH0424654B2 (en) 1992-04-27

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20030625