GB954578A - Improvements in and relating to fire detector devices - Google Patents

Improvements in and relating to fire detector devices

Info

Publication number
GB954578A
GB954578A GB6837/61A GB683761A GB954578A GB 954578 A GB954578 A GB 954578A GB 6837/61 A GB6837/61 A GB 6837/61A GB 683761 A GB683761 A GB 683761A GB 954578 A GB954578 A GB 954578A
Authority
GB
United Kingdom
Prior art keywords
air
filter
feb
microns
photo
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
Application number
GB6837/61A
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.)
Cerberus AG
Original Assignee
Cerberus AG
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 Cerberus AG filed Critical Cerberus AG
Publication of GB954578A publication Critical patent/GB954578A/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
    • G08B17/11—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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
    • G01N27/64—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using wave or particle radiation to ionise a gas, e.g. in an ionisation chamber
    • G01N27/66—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using wave or particle radiation to ionise a gas, e.g. in an ionisation chamber and measuring current or voltage
    • 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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Toxicology (AREA)
  • Electrochemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

954,578. Detection of smoke by radiation. CERBERUS A.G. Feb.24, 1961 [Feb. 26, 1960], No. 6837/61. Headings G1A and G1N. [Also in Division G4] In a fire alarm comprising apparatus for detecting combustion products, false alarms, due to contaminated atmospheres, are minimised by a filter capable of passing particles smaller than 5 microns and rejecting particles larger than 5 microns. In Fig. 2 the tested air is drawn into an ionization chamber via filters 11 of cotton, nylon, or spun glass. Ionization of the air is initiated by radio-active material 16 carried by electrode 15. The presence of aerosols resulting from combustion causes a reduction in the current in indicator 17. Relay-operated alarm arrangements may be included. The filters 11 are cleaned by the suction strokes of the piston 13. In Fig. 3, (not shown), the ionization chamber and filter are supported within an air duct. Fig. 4, (not shown), relates to a plurality of detecting chambers coupled to a single extractor fan. Photo-electric smoke detectors. Fig. 1 (not shown) relates to the use of a dust filter, as above, in the air path of a photo-electric smoke detector. Specification 854, 594 is referred to.
GB6837/61A 1960-02-26 1961-02-24 Improvements in and relating to fire detector devices Expired GB954578A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH220860A CH379974A (en) 1960-02-26 1960-02-26 Fire alarm system with at least one aerosol indicator to detect combustion products suspended in the air

Publications (1)

Publication Number Publication Date
GB954578A true GB954578A (en) 1964-04-08

Family

ID=4228404

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6837/61A Expired GB954578A (en) 1960-02-26 1961-02-24 Improvements in and relating to fire detector devices

Country Status (3)

Country Link
US (1) US3154773A (en)
CH (1) CH379974A (en)
GB (1) GB954578A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0838795A1 (en) * 1996-10-24 1998-04-29 Pittway Corporation Ambient condition detectors
US7656302B2 (en) 2006-11-20 2010-02-02 Honeywell International Inc. Sensing chamber with enhanced ambient atmospheric flow

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4035788A (en) * 1976-01-15 1977-07-12 Celesco Industries Inc. Incipient fire detector
DE2724510C2 (en) * 1977-05-31 1985-04-11 Brunswick Corp., Skokie, Ill. Early warning fire alarm
DE3139582C2 (en) * 1981-10-05 1985-01-24 Preussag AG Bauwesen, 3005 Hemmingen Fire alarm device
US4543815A (en) * 1983-07-15 1985-10-01 Cerberus Ag Device for the detection of foreign components in a gas and an application of the device
FR2583878A1 (en) * 1985-06-21 1986-12-26 Icare Sa Device for atmosphere analysis using an ionisation chamber with a gaseous reactant having a suction intake
US4897549A (en) * 1988-12-19 1990-01-30 Zerda Tadeusz W Method of measuring pore diameters by positronium decay

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2079474A (en) * 1935-12-11 1937-05-04 Thomas A Walsh Dust and fume sampler
US2228216A (en) * 1939-01-06 1941-01-07 Power Patents Co Apparatus for testing cigarettes and the like
US2572008A (en) * 1946-06-05 1951-10-23 C O Two Fire Equipment Co Smoke detector and signal for diesel locomotives

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0838795A1 (en) * 1996-10-24 1998-04-29 Pittway Corporation Ambient condition detectors
US5926098A (en) * 1996-10-24 1999-07-20 Pittway Corporation Aspirated detector
US6166648A (en) * 1996-10-24 2000-12-26 Pittway Corporation Aspirated detector
AU737951B2 (en) * 1996-10-24 2001-09-06 Pittway Corporation Aspirated detector
CN1125419C (en) * 1996-10-24 2003-10-22 彼特威公司 Aspirated detector
US7656302B2 (en) 2006-11-20 2010-02-02 Honeywell International Inc. Sensing chamber with enhanced ambient atmospheric flow

Also Published As

Publication number Publication date
CH379974A (en) 1964-07-15
US3154773A (en) 1964-10-27

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