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WO2004019298A3 - Test source for flame detectors - Google Patents

Test source for flame detectors Download PDF

Info

Publication number
WO2004019298A3
WO2004019298A3 PCT/GB2003/003323 GB0303323W WO2004019298A3 WO 2004019298 A3 WO2004019298 A3 WO 2004019298A3 GB 0303323 W GB0303323 W GB 0303323W WO 2004019298 A3 WO2004019298 A3 WO 2004019298A3
Authority
WO
WIPO (PCT)
Prior art keywords
electrodes
tube
gases
nickel
mixture
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.)
Ceased
Application number
PCT/GB2003/003323
Other languages
French (fr)
Other versions
WO2004019298A2 (en
Inventor
Ian Davidson
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.)
MICROPACK (ENGINEERING) Ltd
MICROPACK ENGINEERING Ltd
Original Assignee
MICROPACK (ENGINEERING) Ltd
MICROPACK ENGINEERING 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 MICROPACK (ENGINEERING) Ltd, MICROPACK ENGINEERING Ltd filed Critical MICROPACK (ENGINEERING) Ltd
Priority to AU2003246976A priority Critical patent/AU2003246976A1/en
Priority to DE60307648T priority patent/DE60307648D1/en
Priority to EP03792456A priority patent/EP1530786B1/en
Publication of WO2004019298A2 publication Critical patent/WO2004019298A2/en
Publication of WO2004019298A3 publication Critical patent/WO2004019298A3/en
Anticipated expiration legal-status Critical
Ceased 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
    • G08B29/12—Checking intermittently signalling or alarm systems
    • G08B29/14—Checking intermittently signalling or alarm systems checking the detection circuits
    • G08B29/145—Checking intermittently signalling or alarm systems checking the detection circuits of fire detection circuits
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/12—Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Control Of Combustion (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Fire Alarms (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

An infrared discharge tube is disclosed, the tube having a body (1) formed from a material, typically sapphire, generally transparent to infrared radiation of between 4 µm and 5 µm, and electrodes (2, 3) formed from a non-reactive or catalytic metal, such as nickel, cupro-nickel or oxidised copper. The body (1) forms a gas tight enclosure, and is evacuated of air and refilled with a mixture of carbon monoxide, carbon dioxide and nitrogen gas. The proportions and pressures of gases in the body (1) are adjusted depending upon the intended use of the source, but are generally in the order of 100mBar for a low energy source capable of stimulating a detector (for example in the case of optical integrity testing), and may be several tens of Bar for a high energy source suitable for use over several tens of metres. The tube is then sealed, and when a high voltage is applied between electrodes (2, 3) an arc is generated across a spark gap (4) between electrodes (2, 3). The metal of the electrodes (2, 3) is chosen so as to resist changes in relative proportions of the constituent gases of the mixture of gases in the tube.
PCT/GB2003/003323 2002-08-21 2003-07-31 Test source for flame detectors Ceased WO2004019298A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU2003246976A AU2003246976A1 (en) 2002-08-21 2003-07-31 Test source for flame detectors
DE60307648T DE60307648D1 (en) 2002-08-21 2003-07-31 TEST SOURCE FOR FLAME DETECTOR
EP03792456A EP1530786B1 (en) 2002-08-21 2003-07-31 Test source for flame detectors

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0219418.1 2002-08-21
GBGB0219418.1A GB0219418D0 (en) 2002-08-21 2002-08-21 Test source for flame detectors

Publications (2)

Publication Number Publication Date
WO2004019298A2 WO2004019298A2 (en) 2004-03-04
WO2004019298A3 true WO2004019298A3 (en) 2004-04-08

Family

ID=9942673

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2003/003323 Ceased WO2004019298A2 (en) 2002-08-21 2003-07-31 Test source for flame detectors

Country Status (6)

Country Link
EP (1) EP1530786B1 (en)
AT (1) ATE336771T1 (en)
AU (1) AU2003246976A1 (en)
DE (1) DE60307648D1 (en)
GB (1) GB0219418D0 (en)
WO (1) WO2004019298A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2426578A (en) * 2005-05-27 2006-11-29 Thorn Security A flame detector having a pulsing optical test source that simulates the frequency of a flame
GB2426577A (en) 2005-05-27 2006-11-29 Thorn Security An optical detector with a reflector outside of its housing, and a plurality of sensors inside of its housing
US8493212B2 (en) 2007-06-15 2013-07-23 Icore and Associates, LLC Passive microwave system and method for protecting a structure from fire threats
US9410849B2 (en) * 2014-01-21 2016-08-09 Kidde Technologies, Inc. Apparatuses, systems, and methods controlling testing optical fire detectors

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4280058A (en) * 1978-04-25 1981-07-21 Cerberus Ag Flame detector
US4864146A (en) * 1987-07-23 1989-09-05 Santa Barbara Research Center Universal fire simulator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4280058A (en) * 1978-04-25 1981-07-21 Cerberus Ag Flame detector
US4864146A (en) * 1987-07-23 1989-09-05 Santa Barbara Research Center Universal fire simulator

Also Published As

Publication number Publication date
AU2003246976A8 (en) 2004-03-11
ATE336771T1 (en) 2006-09-15
WO2004019298A2 (en) 2004-03-04
GB0219418D0 (en) 2002-09-25
DE60307648D1 (en) 2006-09-28
AU2003246976A1 (en) 2004-03-11
EP1530786A2 (en) 2005-05-18
EP1530786B1 (en) 2006-08-16

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