GB2348999B - An alarm device - Google Patents

An alarm device

Info

Publication number
GB2348999B
GB2348999B GB9912479A GB9912479A GB2348999B GB 2348999 B GB2348999 B GB 2348999B GB 9912479 A GB9912479 A GB 9912479A GB 9912479 A GB9912479 A GB 9912479A GB 2348999 B GB2348999 B GB 2348999B
Authority
GB
United Kingdom
Prior art keywords
alarm device
alarm
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
GB9912479A
Other versions
GB2348999A (en
GB9912479D0 (en
GB2348999C (en
Inventor
Michael Byrne
Michael Guinee
James Duignan
Fergus Flynn
Keith Fawcett
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.)
EI Technology Ltd
Original Assignee
EI Technology 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 EI Technology Ltd filed Critical EI Technology Ltd
Publication of GB9912479D0 publication Critical patent/GB9912479D0/en
Publication of GB2348999A publication Critical patent/GB2348999A/en
Publication of GB2348999B publication Critical patent/GB2348999B/en
Application granted granted Critical
Publication of GB2348999C publication Critical patent/GB2348999C/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
    • 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 Alarms (AREA)
GB9912479A 1999-04-13 1999-06-01 An alarm device Expired - Lifetime GB2348999C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IE990304 1999-04-13

Publications (4)

Publication Number Publication Date
GB9912479D0 GB9912479D0 (en) 1999-07-28
GB2348999A GB2348999A (en) 2000-10-18
GB2348999B true GB2348999B (en) 2003-06-18
GB2348999C GB2348999C (en) 2005-10-05

Family

ID=11042042

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9912479A Expired - Lifetime GB2348999C (en) 1999-04-13 1999-06-01 An alarm device

Country Status (2)

Country Link
GB (1) GB2348999C (en)
IE (1) IES990426A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2008200075B1 (en) * 2008-01-08 2009-06-11 Psa Products Pty Ltd Alarm device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2426323A (en) * 2005-05-16 2006-11-22 Fire Fighting Entpr Ltd Infra-red beam smoke detection system
CN109712378B (en) * 2019-02-21 2023-11-17 赛特威尔电子股份有限公司 Alarm device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4315594A (en) * 1979-01-23 1982-02-16 Cerberus Ltd. Connection apparatus for a fire alarm
GB2217495A (en) * 1988-04-08 1989-10-25 Matsushita Electric Works Ltd Ceiling mounted fire detector assembly
EP0582975A1 (en) * 1992-08-13 1994-02-16 Siemens Aktiengesellschaft Automatic fire annunciator
GB2276970A (en) * 1993-04-06 1994-10-12 Dee Electronics Limited Gas alarm
GB2312312A (en) * 1996-04-15 1997-10-22 E I Tech Ltd A mains powered alarm sensor unit having a primary battery backup

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4315594A (en) * 1979-01-23 1982-02-16 Cerberus Ltd. Connection apparatus for a fire alarm
GB2217495A (en) * 1988-04-08 1989-10-25 Matsushita Electric Works Ltd Ceiling mounted fire detector assembly
EP0582975A1 (en) * 1992-08-13 1994-02-16 Siemens Aktiengesellschaft Automatic fire annunciator
GB2276970A (en) * 1993-04-06 1994-10-12 Dee Electronics Limited Gas alarm
GB2312312A (en) * 1996-04-15 1997-10-22 E I Tech Ltd A mains powered alarm sensor unit having a primary battery backup

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2008200075B1 (en) * 2008-01-08 2009-06-11 Psa Products Pty Ltd Alarm device

Also Published As

Publication number Publication date
IES990426A2 (en) 2000-11-15
GB2348999A (en) 2000-10-18
GB9912479D0 (en) 1999-07-28
GB2348999C (en) 2005-10-05

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Legal Events

Date Code Title Description
773B Case decided by the comptroller ** specification amended (sect. 73(2)/1977)
PE20 Patent expired after termination of 20 years

Expiry date: 20190531