CA990865A - Smoke detectors - Google Patents

Smoke detectors

Info

Publication number
CA990865A
CA990865A CA174,945A CA174945A CA990865A CA 990865 A CA990865 A CA 990865A CA 174945 A CA174945 A CA 174945A CA 990865 A CA990865 A CA 990865A
Authority
CA
Canada
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.)
Expired
Application number
CA174,945A
Other versions
CA174945S (en
Inventor
Timothy J. Newington
Nicolaas T. Van Der Walt
Bernardus J. Bout
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.)
Anglo American Corp of South Africa Ltd
Original Assignee
Anglo American Corp of South Africa 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
Priority claimed from ZA724440A external-priority patent/ZA724440B/en
Application filed by Anglo American Corp of South Africa Ltd filed Critical Anglo American Corp of South Africa Ltd
Application granted granted Critical
Publication of CA990865A publication Critical patent/CA990865A/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

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Emergency Management (AREA)
  • Toxicology (AREA)
  • Business, Economics & Management (AREA)
  • Electrochemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
CA174,945A 1972-06-27 1973-06-26 Smoke detectors Expired CA990865A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA724440A ZA724440B (en) 1972-06-27 1972-06-27 Smoke detectors
ZA728084 1972-11-15

Publications (1)

Publication Number Publication Date
CA990865A true CA990865A (en) 1976-06-08

Family

ID=27131055

Family Applications (1)

Application Number Title Priority Date Filing Date
CA174,945A Expired CA990865A (en) 1972-06-27 1973-06-26 Smoke detectors

Country Status (8)

Country Link
US (1) US3824422A (en)
JP (1) JPS4953494A (en)
AU (1) AU475495B2 (en)
CA (1) CA990865A (en)
CH (1) CH566060A5 (en)
DE (1) DE2332424C3 (en)
FR (1) FR2191731A5 (en)
GB (1) GB1379535A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA734995B (en) * 1973-07-23 1974-10-30 Anglo Amer Corp South Africa Improvemente in or relating to fire detectors
JPS5552558Y2 (en) * 1975-02-10 1980-12-05
JPS633253A (en) * 1986-06-24 1988-01-08 Nemoto Tokushu Kagaku Kk Aerosol concentration measuring instrument
JP2536630Y2 (en) * 1989-02-20 1997-05-21 能美防災 株式会社 Photoelectric smoke detector
US6040523A (en) * 1996-12-11 2000-03-21 Raytheon Company Snap-fit design of an airborne missile systems seeker/detector section using engineering plastics
US6057774A (en) * 1999-01-21 2000-05-02 Brk Brands, Inc. Smoke alarm with anti-dust screen
DE102008032145B4 (en) * 2008-07-08 2012-12-06 Techem Energy Services Gmbh Alarm device with a detection chamber open to the environment

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3769917A (en) * 1971-12-20 1973-11-06 Pullman Inc Freight bracing apparatus

Also Published As

Publication number Publication date
CH566060A5 (en) 1975-08-29
US3824422A (en) 1974-07-16
DE2332424B2 (en) 1977-10-27
DE2332424C3 (en) 1978-06-22
AU475495B2 (en) 1976-08-26
FR2191731A5 (en) 1974-02-01
DE2332424A1 (en) 1974-01-31
AU5736473A (en) 1975-01-09
JPS4953494A (en) 1974-05-24
GB1379535A (en) 1975-01-02

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