GB2242521B - Particle detectors - Google Patents

Particle detectors

Info

Publication number
GB2242521B
GB2242521B GB9103206A GB9103206A GB2242521B GB 2242521 B GB2242521 B GB 2242521B GB 9103206 A GB9103206 A GB 9103206A GB 9103206 A GB9103206 A GB 9103206A GB 2242521 B GB2242521 B GB 2242521B
Authority
GB
United Kingdom
Prior art keywords
particle detectors
detectors
particle
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 - Fee Related
Application number
GB9103206A
Other versions
GB2242521A (en
GB9103206D0 (en
Inventor
John Charles Edwards
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.)
FIRE FIGHTING ENTERPRISES
First Technology Fire & Safety
Original Assignee
FIRE FIGHTING ENTERPRISES
First Technology Fire & Safety
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 FIRE FIGHTING ENTERPRISES, First Technology Fire & Safety filed Critical FIRE FIGHTING ENTERPRISES
Publication of GB9103206D0 publication Critical patent/GB9103206D0/en
Publication of GB2242521A publication Critical patent/GB2242521A/en
Application granted granted Critical
Publication of GB2242521B publication Critical patent/GB2242521B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
GB9103206A 1989-06-15 1991-02-15 Particle detectors Expired - Fee Related GB2242521B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB898913773A GB8913773D0 (en) 1989-06-15 1989-06-15 Particle detectors
PCT/GB1990/000920 WO1990016053A1 (en) 1989-06-15 1990-06-14 Particle detectors

Publications (3)

Publication Number Publication Date
GB9103206D0 GB9103206D0 (en) 1991-05-08
GB2242521A GB2242521A (en) 1991-10-02
GB2242521B true GB2242521B (en) 1993-07-21

Family

ID=10658488

Family Applications (2)

Application Number Title Priority Date Filing Date
GB898913773A Pending GB8913773D0 (en) 1989-06-15 1989-06-15 Particle detectors
GB9103206A Expired - Fee Related GB2242521B (en) 1989-06-15 1991-02-15 Particle detectors

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB898913773A Pending GB8913773D0 (en) 1989-06-15 1989-06-15 Particle detectors

Country Status (4)

Country Link
EP (1) EP0434790A1 (en)
AU (1) AU635039B2 (en)
GB (2) GB8913773D0 (en)
WO (1) WO1990016053A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0503167B1 (en) * 1991-03-12 1995-06-14 Matsushita Electric Works, Ltd. A method for testing smoke sensor and a smoke sensor having a function of executing the test
AUPN179995A0 (en) * 1995-03-17 1995-04-13 Vision Systems Limited Improvements relating to gas pollution detection equipment
GB2586283B (en) * 2019-08-16 2022-01-26 Apollo Fire Detectors Ltd Optical smoke detector

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3678488A (en) * 1971-02-08 1972-07-18 Environment One Corp Self-adjusting condensation nuclei monitor measuring circuit having adjustable gain
GB2074721A (en) * 1980-04-23 1981-11-04 Furnace Construction Co Ltd Smoke sensor apparatus
US4308531A (en) * 1980-05-22 1981-12-29 Nittan Company, Ltd. Light transmission type smoke detector
US4317113A (en) * 1979-08-24 1982-02-23 Hochiki Corporation Photoelectric smoke sensor
EP0079010A1 (en) * 1981-11-11 1983-05-18 Cerberus Ag Smoke detector
EP0140502A1 (en) * 1983-08-12 1985-05-08 Martin Terence Cole Improvements relating to smoke detection apparatus
EP0145189A1 (en) * 1983-10-21 1985-06-19 COLE, Martin Terence Improvements relating to smoke detection apparatus
GB2170597A (en) * 1985-01-31 1986-08-06 Thorn Emi Protech Limited Smoke detector
GB2231951A (en) * 1989-03-02 1990-11-28 I E I Detection apparatus and methods

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1277005C (en) * 1983-10-21 1990-11-27 Martin T. Cole Smoke detection apparatus

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3678488A (en) * 1971-02-08 1972-07-18 Environment One Corp Self-adjusting condensation nuclei monitor measuring circuit having adjustable gain
US4317113A (en) * 1979-08-24 1982-02-23 Hochiki Corporation Photoelectric smoke sensor
GB2074721A (en) * 1980-04-23 1981-11-04 Furnace Construction Co Ltd Smoke sensor apparatus
US4308531A (en) * 1980-05-22 1981-12-29 Nittan Company, Ltd. Light transmission type smoke detector
EP0079010A1 (en) * 1981-11-11 1983-05-18 Cerberus Ag Smoke detector
EP0140502A1 (en) * 1983-08-12 1985-05-08 Martin Terence Cole Improvements relating to smoke detection apparatus
EP0145189A1 (en) * 1983-10-21 1985-06-19 COLE, Martin Terence Improvements relating to smoke detection apparatus
GB2170597A (en) * 1985-01-31 1986-08-06 Thorn Emi Protech Limited Smoke detector
GB2231951A (en) * 1989-03-02 1990-11-28 I E I Detection apparatus and methods

Also Published As

Publication number Publication date
EP0434790A1 (en) 1991-07-03
AU5830690A (en) 1991-01-08
WO1990016053A1 (en) 1990-12-27
GB8913773D0 (en) 1989-08-02
AU635039B2 (en) 1993-03-11
GB2242521A (en) 1991-10-02
GB9103206D0 (en) 1991-05-08

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Legal Events

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

Effective date: 19940614