GB636647A - Improvements in or relating to apparatus for detecting the presence of explosive or toxic gases - Google Patents

Improvements in or relating to apparatus for detecting the presence of explosive or toxic gases

Info

Publication number
GB636647A
GB636647A GB3245647A GB3245647A GB636647A GB 636647 A GB636647 A GB 636647A GB 3245647 A GB3245647 A GB 3245647A GB 3245647 A GB3245647 A GB 3245647A GB 636647 A GB636647 A GB 636647A
Authority
GB
United Kingdom
Prior art keywords
filaments
contact
carried
detecting
potentiometer
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
GB3245647A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB3245647A priority Critical patent/GB636647A/en
Publication of GB636647A publication Critical patent/GB636647A/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
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/14—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature
    • G01N27/16—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature caused by burning or catalytic oxidation of surrounding material to be tested, e.g. of gas

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)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

<PICT:0636647/III/1> <PICT:0636647/III/2> In apparatus for detecting explosive or toxic gases, of the kind disclosed in Specification 567,101, the detachable filament unit comprises the filaments B, B1 supported from terminals A3 carried by insulating cylindrical end-portions A, A1, spaced apart by the wall A2 which screens the filaments in known manner. The unit is connected into circuit by means of the three contact pins D connected respectively to adjacent ends of the two filaments and to the contact C2. The other ends of the filaments are connected respectively to the ends of an annular potentiometer wire C carried on the portion A, the rotatable potentiometer arm C1 being carried by the contact C2. The potentiometer serves for the initial adjustment of the relative resistances of the filaments and is preferably locked in its adjusted position, e.g. by soldering the arm C1 to the wire C. In an alternative construction, the fixed contact C2 engages another contact when the unit is positioned in the detecting apparatus, in which case the corresponding contact D is dispensed with.
GB3245647A 1947-12-09 1947-12-09 Improvements in or relating to apparatus for detecting the presence of explosive or toxic gases Expired GB636647A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3245647A GB636647A (en) 1947-12-09 1947-12-09 Improvements in or relating to apparatus for detecting the presence of explosive or toxic gases

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3245647A GB636647A (en) 1947-12-09 1947-12-09 Improvements in or relating to apparatus for detecting the presence of explosive or toxic gases

Publications (1)

Publication Number Publication Date
GB636647A true GB636647A (en) 1950-05-03

Family

ID=10338876

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3245647A Expired GB636647A (en) 1947-12-09 1947-12-09 Improvements in or relating to apparatus for detecting the presence of explosive or toxic gases

Country Status (1)

Country Link
GB (1) GB636647A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1171643B (en) * 1961-02-24 1964-06-04 English Electric Co Ltd Device for the detection of a gas in a gas mixture
EP1861868A2 (en) * 2005-03-16 2007-12-05 Advanced Technology Materials, Inc. Method and apparatus for monitoring plasma conditions in an etching plasma processing facility
US8109130B2 (en) 2002-10-17 2012-02-07 Advanced Technology Materials, Inc. Apparatus and process for sensing fluoro species in semiconductor processing systems

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1171643B (en) * 1961-02-24 1964-06-04 English Electric Co Ltd Device for the detection of a gas in a gas mixture
US8109130B2 (en) 2002-10-17 2012-02-07 Advanced Technology Materials, Inc. Apparatus and process for sensing fluoro species in semiconductor processing systems
EP1861868A2 (en) * 2005-03-16 2007-12-05 Advanced Technology Materials, Inc. Method and apparatus for monitoring plasma conditions in an etching plasma processing facility
EP1861868A4 (en) * 2005-03-16 2010-11-24 Advanced Tech Materials Method and apparatus for monitoring plasma conditions in an etching plasma processing facility

Similar Documents

Publication Publication Date Title
FR1072579A (en) Electric arc welding device
HU187748B (en) Halogen lamp with two filaments at least
GB636647A (en) Improvements in or relating to apparatus for detecting the presence of explosive or toxic gases
CH230968A (en) Electric circuit breaker, fitted with an arc blowing device.
US2247737A (en) Inspection apparatus
CH608139A5 (en) Cable-reel device, especially for electrical domestic apparatuses
US2429004A (en) Fabric contacting circuit closer for knitting machines
FR1100469A (en) Glass-wrapped electrical apparatus, in particular incandescent lamp or discharge tube
JPS5232587A (en) Device with big current conductor
Campbell The Campbell condenser tube test apparatus
JPS51119989A (en) Bridged heat-proof incombustible wire
SU396771A1 (en) CARTRIDGE FOR LAMP OF GARDEN AND GIRLANDS
GB687225A (en) Improvements in or relating to electric discharge devices
JPS5246877A (en) Alarm device for temperature sensing resistor
FR1218167A (en) Device ensuring the immediate ignition, without a starter, of any tubular fluorescent lamp with hot cathodes
BE575397A (en) Device ensuring the immediate ignition, without a starter, of any tubular fluorescent lamp with hot cathodes
BE582355A (en) Device for electrical installations, in particular a switch, with removable cup-shaped insulating material socket for a glow or incandescent lamp.
Vööbus A Critical Apparatus for the Vetus Syra
JPS5216255A (en) Measuring device for loss angle
GB695911A (en) Improvements in electrode holders for ph apparatus
CA475319A (en) Means for supporting tubular electric lamps of the gas-discharge type
CA470935A (en) Tubular containers for electrical condensers or other apparatus
CA475408A (en) Tubular containers for electrical condensers or other apparatus
BE592039A (en) Incandescent safety ignition device for gas burner.
JPS5318840A (en) Induction heater