GB1087609A - Fire and smoke detector - Google Patents

Fire and smoke detector

Info

Publication number
GB1087609A
GB1087609A GB53699/65A GB5369965A GB1087609A GB 1087609 A GB1087609 A GB 1087609A GB 53699/65 A GB53699/65 A GB 53699/65A GB 5369965 A GB5369965 A GB 5369965A GB 1087609 A GB1087609 A GB 1087609A
Authority
GB
United Kingdom
Prior art keywords
conductor
charge
smoke
fire
dec
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
GB53699/65A
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.)
Yissum Research Development Co of Hebrew University of Jerusalem
Original Assignee
Yissum Research Development Co of Hebrew University of Jerusalem
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 Yissum Research Development Co of Hebrew University of Jerusalem filed Critical Yissum Research Development Co of Hebrew University of Jerusalem
Publication of GB1087609A publication Critical patent/GB1087609A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/003—Systems for controlling combustion using detectors sensitive to combustion gas properties
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/025—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using electrical or electromechanical means
    • 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
    • G01N27/60—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrostatic variables, e.g. electrographic flaw testing
    • 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
    • G08B17/11—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
    • 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

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Health & Medical Sciences (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)

Abstract

1,087,609. Fire detectors. YISSUM RESEARCH DEVELOPMENT CO. Dec. 17, 1965 [Dec. 27, 1964], No. 53699/65. Heading G1N. [Also in Divisions G4 and H3] Smoke and combustion products from a fire, carrying a net electrical charge, are detected by a device comprising an electrical conductor 12, Fig. 1, on whose surface a charge is induced due to the charged smoke &c. The flow of current in a circuit, connected to the conductor, resulting from the induced charge, is amplified and used to energize an alarm and/or automatic fire extinguishing apparatus. The metal conductor, preferably of mesh or perforated sheet may be of any shape, e. g. cylindrical, flat box-shaped or a flat sheet, and is supported by an insulator 13, e. g. of P. T. F. E. An earthed conducting shield 11, of one or more layers of wire mesh or perforated sheet metal, surrounds the conductor 12 and screens it from external fields or charges. The output from the device when smoke is present is fed to a charge sensitive amplifier 15, which energizes a relay 16, having one or more pairs of electrical contacts 17, to operate an alarm 18 and/or fire extinguishing apparatus 19.
GB53699/65A 1964-12-27 1965-12-17 Fire and smoke detector Expired GB1087609A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IL22673A IL22673A (en) 1964-12-27 1964-12-27 Sensitive smoke and fire detector

Publications (1)

Publication Number Publication Date
GB1087609A true GB1087609A (en) 1967-10-18

Family

ID=11043453

Family Applications (1)

Application Number Title Priority Date Filing Date
GB53699/65A Expired GB1087609A (en) 1964-12-27 1965-12-17 Fire and smoke detector

Country Status (7)

Country Link
US (1) US3470551A (en)
CH (1) CH446961A (en)
DE (1) DE1277711B (en)
FR (1) FR1473061A (en)
GB (1) GB1087609A (en)
IL (1) IL22673A (en)
NL (1) NL6516966A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2438839A1 (en) * 1978-10-11 1980-05-09 Johnson Controls Inc Polar gas detector with probe surface of charged dielectric material - with low water absorption and high vol. resistivity to give high sensitivity
EP0199760A1 (en) * 1984-10-09 1986-11-05 Auburn Int Dust flow inducing monitor.

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3573777A (en) * 1968-12-09 1971-04-06 Honeywell Inc Combustion products detector control apparatus
US3673586A (en) * 1970-02-19 1972-06-27 Statitrol Corp Resistance controlled timed pulse generator
US3754219A (en) * 1972-01-03 1973-08-21 Johnson Service Co High impedance gaseous ion sensing and detection system
US4360856A (en) * 1981-01-08 1982-11-23 Witthaus Ira L Electric sensor package
US4456883A (en) 1982-10-04 1984-06-26 Ambac Industries, Incorporated Method and apparatus for indicating an operating characteristic of an internal combustion engine
CH666135A5 (en) * 1982-12-03 1988-06-30 Slm Investissements S A FIRE DETECTORS.
US6057774A (en) * 1999-01-21 2000-05-02 Brk Brands, Inc. Smoke alarm with anti-dust screen
DE102014019773B4 (en) 2014-12-17 2023-12-07 Elmos Semiconductor Se Device and method for distinguishing between solid objects, cooking fumes and smoke using the display of a mobile telephone
DE102014019172B4 (en) 2014-12-17 2023-12-07 Elmos Semiconductor Se Device and method for distinguishing between solid objects, cooking fumes and smoke using a compensating optical measuring system

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2815483A (en) * 1957-12-03 Electric field detection
DE718327C (en) * 1937-06-09 1942-03-09 Walter Jaeger Fire and smoke alarms
DE901319C (en) * 1938-12-15 1954-01-11 Siemens Ag Changeable electrical capacitor
US2408051A (en) * 1942-04-04 1946-09-24 American District Telegraph Co Fire and smoke detector and the like
US2491445A (en) * 1947-02-24 1949-12-13 Shell Dev Flowmeter
US2556458A (en) * 1948-02-09 1951-06-12 W E Anderson Inc Static electricity indicator
DE923073C (en) * 1952-03-06 1955-02-03 Lufttechnische Ges M B H Method and device for periodic measurement of the electrical charge in atmospheric air
AT198548B (en) * 1954-12-16 1958-07-10 Eugen Dr Feifel Device for determining the dust content of gases and vapors
US2820947A (en) * 1955-04-29 1958-01-21 Gunn Ross Electric field meter
DE1056008B (en) * 1956-04-06 1959-04-23 Phys Maurice E Nahmias Dr Device for detecting smoke etc.
NL224264A (en) * 1957-10-24
DE1114413B (en) * 1959-06-06 1961-09-28 Telefonbau & Normalzeit Gmbh Electric alarm system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2438839A1 (en) * 1978-10-11 1980-05-09 Johnson Controls Inc Polar gas detector with probe surface of charged dielectric material - with low water absorption and high vol. resistivity to give high sensitivity
EP0199760A1 (en) * 1984-10-09 1986-11-05 Auburn Int Dust flow inducing monitor.
EP0199760A4 (en) * 1984-10-09 1987-03-09 Auburn Int Dust flow inducing monitor.

Also Published As

Publication number Publication date
FR1473061A (en) 1967-03-17
IL22673A (en) 1968-06-20
US3470551A (en) 1969-09-30
DE1277711B (en) 1968-09-12
CH446961A (en) 1967-11-15
NL6516966A (en) 1966-03-25

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