GB728114A - Improvements in and relating to electrical vapour detectors - Google Patents

Improvements in and relating to electrical vapour detectors

Info

Publication number
GB728114A
GB728114A GB23297/53A GB2329753A GB728114A GB 728114 A GB728114 A GB 728114A GB 23297/53 A GB23297/53 A GB 23297/53A GB 2329753 A GB2329753 A GB 2329753A GB 728114 A GB728114 A GB 728114A
Authority
GB
United Kingdom
Prior art keywords
electrode
vapour
cathode
heated
thermionic
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
GB23297/53A
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 GB728114A publication Critical patent/GB728114A/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
    • G01N27/68—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 electric discharge to ionise a gas
    • G01N27/70—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 electric discharge to ionise a gas and measuring current or voltage
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/005—Gas-filled transit-time tubes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)

Abstract

728,114. Electric tests and measurements. GENERAL ELECTRIC CO. Aug. 24, 1953 [Aug. 22, 1952], No. 23297/53. Class 37. [Also in Group XL (a)] In a vapour detecting device of the type described in Specification 648,367, in which the presence of the vapour causes an ionic discharge between a heated electrode and a collector electrode, amplification is obtained by making the said collector electrode the cathode of a thermionic valve. The filament electrode 3 is positive with respect to tubular electrode 7, and when it is heated in the presence of halogen vapour, as described in Specification 725,515 an ionic discharge occurs. This is collected by electrode 7, which has an external coating of emissive material, and also acts as a thermionic cathode, cooperating with anode 5 and control grid 4, and heated by filament 3. Variations in cathode potential caused by the collection of the ions will cause corresponding variations in the anode current, indicated by an external instrument 21. If current gain is not important, control grid 4 may be omitted. The hollow cathode 7 extends through the tube envelope at one end, and is closed at the other end, as at 8, so that the vapour admitted is isolated from the interior of the thermionic discharge space.
GB23297/53A 1952-08-22 1953-08-24 Improvements in and relating to electrical vapour detectors Expired GB728114A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US305884A US2652532A (en) 1952-08-22 1952-08-22 Electrical vapor detector

Publications (1)

Publication Number Publication Date
GB728114A true GB728114A (en) 1955-04-13

Family

ID=23182781

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23297/53A Expired GB728114A (en) 1952-08-22 1953-08-24 Improvements in and relating to electrical vapour detectors

Country Status (4)

Country Link
US (1) US2652532A (en)
BE (1) BE522260A (en)
FR (1) FR65090E (en)
GB (1) GB728114A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4658181A (en) * 1983-10-07 1987-04-14 English Electric Valve Company Limited Travelling wave tubes

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2814574A (en) * 1954-07-06 1957-11-26 Raytheon Mfg Co Black coatings for metal parts and methods for forming such coatings
US2879184A (en) * 1956-03-30 1959-03-24 Gen Electric Method of rendering titanium dioxide films electrically conductive
US2946914A (en) * 1958-06-16 1960-07-26 Stirling A Colgate Apparatus for producing and manipulating plasmas
US3991360A (en) * 1975-05-16 1976-11-09 General Electric Company Sensor assembly for a halogen gas leak detector
US5301537A (en) * 1991-05-31 1994-04-12 W. C. Wood Company Limited Method for detecting halocarbon refrigerant leaks by usage of a continually heated mass spectrometer
US7487662B2 (en) * 2001-12-13 2009-02-10 The University Of Wyoming Research Corporation Volatile organic compound sensor system
WO2008025320A1 (en) * 2006-08-29 2008-03-06 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Catalytically active component for thermal ionization detectors for the detection of halogen-containing compounds and process for producing an oxide-ceramic material for the component

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1356687A (en) * 1920-10-26 Method and apparatus for measuring gas-pressures
US2550498A (en) * 1947-06-14 1951-04-24 Gen Electric Method and apparatus for electrically detecting vapors and the like
US2652586A (en) * 1951-06-26 1953-09-22 Elmer F Ramsberger Curtain rod bracket and ring

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4658181A (en) * 1983-10-07 1987-04-14 English Electric Valve Company Limited Travelling wave tubes

Also Published As

Publication number Publication date
FR65090E (en) 1956-01-26
BE522260A (en)
US2652532A (en) 1953-09-15

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