GB1186525A - Improvements in "Ion Chamber Detector" - Google Patents

Improvements in "Ion Chamber Detector"

Info

Publication number
GB1186525A
GB1186525A GB40298/67A GB4029867A GB1186525A GB 1186525 A GB1186525 A GB 1186525A GB 40298/67 A GB40298/67 A GB 40298/67A GB 4029867 A GB4029867 A GB 4029867A GB 1186525 A GB1186525 A GB 1186525A
Authority
GB
United Kingdom
Prior art keywords
gas
sept
openings
gaseous carrier
pass
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
GB40298/67A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of GB1186525A publication Critical patent/GB1186525A/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
    • G08B17/113—Constructional details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J41/00—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas; Discharge tubes for evacuation by diffusion of ions
    • H01J41/02—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas
    • H01J41/08—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas with ionisation by means of radioactive substances, e.g. alphatrons

Landscapes

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

Abstract

1,186,525. lonization chambers. GENERAL ELECTRIC CO. 4 Sept., 1967 [12 Sept., 1966], No. 40298/67. Heading HID. Apparatus for detecting sub-micron particles in a gaseous carrier comprises a mixing and gas ionizing section, including means 17 for imparting turbulent flow to said gas, means 15 defining a delay volume 18 for receiving the particle-bearing gas and a source 25 of radiation to effect ionization of the gaseous carrier, operably joined to a detector section 30 including spaced electrodes 31 and 33. Gas, e.g. air, and entrained particles pass from an inlet 13 through openings 19 in diffusion baffle 17 to the delay volume 18 where the gas is ionized by an alpha source 25, e.g. Th 232, distributed uniformly along the wall of member 15, and then pass through openings 27 to the detector section 30, emerging through an opening 35 and leaving through exit 14. Electrode 31 is connected by a cable 36 to a sensing and amplifying device, e.g. an electrometer.
GB40298/67A 1966-09-12 1967-09-04 Improvements in "Ion Chamber Detector" Expired GB1186525A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US57888466A 1966-09-12 1966-09-12

Publications (1)

Publication Number Publication Date
GB1186525A true GB1186525A (en) 1970-04-02

Family

ID=24314704

Family Applications (1)

Application Number Title Priority Date Filing Date
GB40298/67A Expired GB1186525A (en) 1966-09-12 1967-09-04 Improvements in "Ion Chamber Detector"

Country Status (4)

Country Link
US (1) US3573460A (en)
JP (1) JPS4930160B1 (en)
DE (1) DE1648902B2 (en)
GB (1) GB1186525A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2147734A (en) * 1983-08-11 1985-05-15 Varian Associates Flow contoured electron capture detector cell
US4651008A (en) * 1983-08-11 1987-03-17 Varian Associates, Inc. Sample inlet system for an electron capture detector
US4684807A (en) * 1983-08-11 1987-08-04 Varian Associates, Inc. Flow contoured electron capture detector cell
EP0524022A1 (en) * 1991-07-19 1993-01-20 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Gas detection device and method

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3892968A (en) * 1971-08-06 1975-07-01 James Ephraim Lovelock Electron capture detector systems
US3973438A (en) * 1973-08-21 1976-08-10 Westinghouse Electric Corporation Composition for forming thermo-particulating coating which protects electrical apparatus
US4046733A (en) * 1975-12-30 1977-09-06 Westinghouse Electric Corporation Sulfonic acid composition for forming thermoparticulating coating
US4130009A (en) * 1976-03-23 1978-12-19 Westinghouse Electric Corp. Method and apparatus for determining thermoparticulation temperature of compounds
US4055075A (en) * 1976-04-08 1977-10-25 Flanders Filters, Inc. Method and apparatus for the leak testing of filters
US4102192A (en) * 1976-04-13 1978-07-25 Westinghouse Electric Corp. Metallic carboxylate composition for forming thermoparticulating coating
US4053776A (en) * 1976-05-25 1977-10-11 The United States Of America As Represented By Thesecretary Of The Interior Sub-micron particle detector
US4080535A (en) * 1976-08-17 1978-03-21 Westinghouse Electric Corporation Generator condition monitor for particulate detection
US4074137A (en) * 1976-09-02 1978-02-14 General Electric Company Heated ion chamber detector for a dynamoelectric machine
US4108001A (en) * 1976-09-23 1978-08-22 Westinghouse Electric Corp. Urea composition for forming thermoparticulating coating
US4121458A (en) * 1977-02-24 1978-10-24 Westinghouse Electric Corp. Reliable dynamoelectric machine condition monitor
US4119851A (en) * 1977-06-23 1978-10-10 Honeywell Inc. Apparatus and a method for detecting and measuring trace gases in air or other gas backgrounds
EP0000585B1 (en) * 1977-08-01 1983-03-09 General Electric Company Automatic control system for processing signals from an overheat monitor of a dynamoelectric machine
US4160908A (en) * 1978-01-30 1979-07-10 Westinghouse Electric Corp. Particulate enhancement for generator condition monitors
US4520157A (en) * 1982-12-22 1985-05-28 Westinghouse Electric Corp. Early warning fire-detection paint
CH682423A5 (en) * 1991-03-13 1993-09-15 Asea Brown Boveri Method and apparatus for measuring the concentration of a gas contained in particles.
JP2002014080A (en) 2000-06-28 2002-01-18 Mitsubishi Electric Corp Device and system for monitoring cooling gas in generator
US7369057B2 (en) * 2005-08-04 2008-05-06 Siemens Power Generation, Inc. Power generator and power generator auxiliary monitoring
US7549803B2 (en) * 2007-04-05 2009-06-23 Siemens Energy, Inc. Fiber optic generator condition monitor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB919208A (en) * 1958-09-12 1963-02-20 Nat Res Dev Improvements in or relating to the detection and/or analysis of low concentrations of gases and vapours
NL266283A (en) * 1960-06-27
US3178930A (en) * 1963-04-08 1965-04-20 Little Inc A Monitor and spectrometer for atmospheric particulate matter

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2147734A (en) * 1983-08-11 1985-05-15 Varian Associates Flow contoured electron capture detector cell
US4651008A (en) * 1983-08-11 1987-03-17 Varian Associates, Inc. Sample inlet system for an electron capture detector
US4684807A (en) * 1983-08-11 1987-08-04 Varian Associates, Inc. Flow contoured electron capture detector cell
EP0524022A1 (en) * 1991-07-19 1993-01-20 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Gas detection device and method
WO1993002354A1 (en) * 1991-07-19 1993-02-04 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Gas detection device and method
GB2272297A (en) * 1991-07-19 1994-05-11 Secr Defence Gas detection device and method
GB2272297B (en) * 1991-07-19 1995-05-17 Secr Defence Gas detection device and method
AU660703B2 (en) * 1991-07-19 1995-07-06 Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland, The Gas detection device and method
US5572137A (en) * 1991-07-19 1996-11-05 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Portable device for detecting UV light ionizable gas or vapor

Also Published As

Publication number Publication date
US3573460A (en) 1971-04-06
DE1648902B2 (en) 1976-12-02
DE1648902A1 (en) 1971-05-13
JPS4930160B1 (en) 1974-08-10

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years