GB1228800A - - Google Patents

Info

Publication number
GB1228800A
GB1228800A GB1228800DA GB1228800A GB 1228800 A GB1228800 A GB 1228800A GB 1228800D A GB1228800D A GB 1228800DA GB 1228800 A GB1228800 A GB 1228800A
Authority
GB
United Kingdom
Prior art keywords
electrode
particles
aug
combustion
source
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
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 filed Critical
Publication of GB1228800A publication Critical patent/GB1228800A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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)
  • 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)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Prostheses (AREA)
  • Measurement Of Radiation (AREA)
  • Fire-Detection Mechanisms (AREA)

Abstract

1,228,800. Smoke detectors. HONEYWELL Inc. Aug. 1, 1968 [Aug. 2, 1967], No.36835/68. Heading G1N. [Also in Division H1] In an ionization chamber for detecting products of combustion, a source 11 of particles, e.g. Ni<SP>63</SP> or tritium, is coated on one electrode 10, the other electrode 12 being spaced therefrom by a distance less than the maximum range of the higher energy # particles and greater than 3/2 times the half thickness range of the # particles emitted from the source. The rod electrode 10 may be the anode or the cathode and the cup shaped electrode 12 is surrounded by a grounded shield 16, slots 16a, 12a being provided to allow access into the interelectrode space for the products of combustion. Solid state circuit components (not shown) may be mounted on an insulating board 13 housed in space 20.
GB1228800D 1967-08-02 1968-08-01 Expired GB1228800A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US65782667A 1967-08-02 1967-08-02

Publications (1)

Publication Number Publication Date
GB1228800A true GB1228800A (en) 1971-04-21

Family

ID=24638799

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1228800D Expired GB1228800A (en) 1967-08-02 1968-08-01

Country Status (6)

Country Link
US (1) US3560737A (en)
BE (1) BE718911A (en)
DE (1) DE1773949A1 (en)
FR (1) FR1575343A (en)
GB (1) GB1228800A (en)
NL (1) NL6810468A (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH475614A (en) * 1968-06-18 1969-07-15 Cerberus Ag Werke Fuer Elektro Ionization fire alarms
NL6918515A (en) * 1968-12-24 1970-06-26
CH508251A (en) * 1970-07-23 1971-05-31 Cerberus Ag Ionization fire alarms
US3935465A (en) * 1973-04-24 1976-01-27 Geba-Gesellschaft Fuer Elektronische Brandmeldeanlagen Mbh Ionization analyzing air pollution, smoke and fire alarm device
GB1469570A (en) * 1974-10-22 1977-04-06 Lovelock J Ionisation detectors
US4044263A (en) * 1975-01-28 1977-08-23 Walter Kidde & Company, Inc. Ionization dual-zone static detector having single radioactive source
US4021671A (en) * 1975-07-07 1977-05-03 Gulf & Western Manufacturing Company (Systems) Ionization detector
US4185197A (en) * 1978-01-13 1980-01-22 General Electric Company Arrangement for inhibiting the effect of extraneous electric fields on an improved ionization smoke detector
FR2438841A1 (en) * 1978-10-13 1980-05-09 Commissariat Energie Atomique Ionic fire detection sensor - contains auxiliary electrode and applies intermediate voltage to ionised chamber screen
JPS6044194U (en) * 1983-09-05 1985-03-28 能美防災工業株式会社 Heat-resistant case for ionization smoke detector
GB2182198B (en) * 1985-10-31 1991-05-15 Gent Ltd Ionisation detection chamber
FR2594953B1 (en) * 1986-02-25 1989-05-05 Lewiner Jacques SMOKE DETECTOR WITH IONIZATION CHAMBER
US7456411B2 (en) * 2006-07-06 2008-11-25 General Electric Company He-3 neutron proportional counter with internal leakage detection and related method
US20080210839A1 (en) * 2006-11-15 2008-09-04 Klapp Charles R Smoke detector recessed box

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2908819A (en) * 1955-06-13 1959-10-13 Phillips Petroleum Co Apparatus for measuring properties of gases
US2990492A (en) * 1958-10-24 1961-06-27 Gen Electric Electric discharge device
US3271756A (en) * 1960-03-22 1966-09-06 Harold J Burke Method and apparatus for detecting a hazardous condition
US3185845A (en) * 1961-02-15 1965-05-25 Continental Oil Co Method of and apparatus for analyzing chemical compounds

Also Published As

Publication number Publication date
US3560737A (en) 1971-02-02
DE1773949A1 (en) 1971-11-25
NL6810468A (en) 1969-02-04
BE718911A (en) 1969-01-16
FR1575343A (en) 1969-07-18

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Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed