GB727891A - Improved means for analysing gaseous substances - Google Patents

Improved means for analysing gaseous substances

Info

Publication number
GB727891A
GB727891A GB1053251A GB1053251A GB727891A GB 727891 A GB727891 A GB 727891A GB 1053251 A GB1053251 A GB 1053251A GB 1053251 A GB1053251 A GB 1053251A GB 727891 A GB727891 A GB 727891A
Authority
GB
United Kingdom
Prior art keywords
gas
tubes
transducers
sound energy
diaphragm
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
GB1053251A
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 GB1053251A priority Critical patent/GB727891A/en
Publication of GB727891A publication Critical patent/GB727891A/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
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/02—Analysing fluids

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material 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 Ultrasonic Waves (AREA)

Abstract

An instrument for determining the nature of a gas comprises a self-excited oscillator supplying electrical energy to one or more sending transducers adapted to transmit sound energy through a vessel containing a variant gas, one or more receiving transducers for the sound energy transmitted, and means for comparing the electrical signals received as regards phase and amplitude with those obtained by the passage of sound energy through a datum gas. The presence of methane and carbon dioxide in the atmosphere of a mine may be detected. The instrument may be made of portable size by employing ultrasonic frequencies. As shown, high frequency alternating current is supplied by an oscillator 10 to transducers 11, 16; perforated tube 13 is accessible to the gas being tested, and sealed tube 18 contains a known gas; sound energy is converted back to electrical energy by transducers 12, 17. A difference in velocity through the tubes causes a change in phase relationship in the outputs of 12, 17, which is measured by phase meter 14 comprising a ring modulator; attenuation of the sound energy causes an amplitude difference of the outputs measured by a voltmeter. The measuring means may comprise a relay-operated signalling device. Apparatus is described in which the two tubes are arranged side by side in a box and a water wick maintains a constant <PICT:0727891/III/1> moisture condition in the gas being tested. In alternative forms of apparatus (a) the tubes are in line with a double-diaphragm transducer arranged between their ends; (b) the tubes are formed by bores in a single body, and a transducer, separated from the bores by a diaphragm, is arranged at each end of the body; (c) the tubes are curved and their ends are connected to two double-diaphragm transducers.
GB1053251A 1951-05-04 1951-05-04 Improved means for analysing gaseous substances Expired GB727891A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1053251A GB727891A (en) 1951-05-04 1951-05-04 Improved means for analysing gaseous substances

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1053251A GB727891A (en) 1951-05-04 1951-05-04 Improved means for analysing gaseous substances

Publications (1)

Publication Number Publication Date
GB727891A true GB727891A (en) 1955-04-13

Family

ID=9969563

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1053251A Expired GB727891A (en) 1951-05-04 1951-05-04 Improved means for analysing gaseous substances

Country Status (1)

Country Link
GB (1) GB727891A (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2891400A (en) * 1955-02-18 1959-06-23 Austin N Stanton Fluid density transducers
US2926522A (en) * 1956-02-10 1960-03-01 Kritz Jack Densitometer
US2952153A (en) * 1955-12-12 1960-09-13 Cons Electrodynamics Corp Acoustical apparatus for gas detection
US2984097A (en) * 1956-09-11 1961-05-16 Merck & Co Inc Gas measuring apparatus
US3019656A (en) * 1956-04-20 1962-02-06 Atomic Energy Authority Uk Pressure gauges
US3120750A (en) * 1958-11-28 1964-02-11 Iii Elihu Root Gas analyzer
US3137169A (en) * 1961-09-21 1964-06-16 Sperry Rand Corp Remote indicating device
US3344671A (en) * 1964-12-03 1967-10-03 Gordy Irving Time measurement as indication of temperature
US4255964A (en) * 1978-11-30 1981-03-17 The Garrett Corporation Fluid monitor
US4520654A (en) * 1983-03-14 1985-06-04 General Electric Company Method and apparatus for detecting hydrogen, oxygen and water vapor concentrations in a host gas
WO2002031488A1 (en) * 2000-10-09 2002-04-18 Hök Instrument Ab Co2 sensor
EP1205748A1 (en) * 2000-11-13 2002-05-15 Siemens-Elema AB Acoustic gas analyser
US7169490B2 (en) 2004-03-29 2007-01-30 Ballard Power Systems Inc. Hydrogen concentration sensor for an electrochemical fuel cell

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2891400A (en) * 1955-02-18 1959-06-23 Austin N Stanton Fluid density transducers
US2952153A (en) * 1955-12-12 1960-09-13 Cons Electrodynamics Corp Acoustical apparatus for gas detection
US2926522A (en) * 1956-02-10 1960-03-01 Kritz Jack Densitometer
US3019656A (en) * 1956-04-20 1962-02-06 Atomic Energy Authority Uk Pressure gauges
US2984097A (en) * 1956-09-11 1961-05-16 Merck & Co Inc Gas measuring apparatus
US3120750A (en) * 1958-11-28 1964-02-11 Iii Elihu Root Gas analyzer
US3137169A (en) * 1961-09-21 1964-06-16 Sperry Rand Corp Remote indicating device
US3344671A (en) * 1964-12-03 1967-10-03 Gordy Irving Time measurement as indication of temperature
US4255964A (en) * 1978-11-30 1981-03-17 The Garrett Corporation Fluid monitor
US4520654A (en) * 1983-03-14 1985-06-04 General Electric Company Method and apparatus for detecting hydrogen, oxygen and water vapor concentrations in a host gas
WO2002031488A1 (en) * 2000-10-09 2002-04-18 Hök Instrument Ab Co2 sensor
US6843101B2 (en) 2000-10-09 2005-01-18 Hoek Bertil CO2 sensor
EP1205748A1 (en) * 2000-11-13 2002-05-15 Siemens-Elema AB Acoustic gas analyser
US7169490B2 (en) 2004-03-29 2007-01-30 Ballard Power Systems Inc. Hydrogen concentration sensor for an electrochemical fuel cell

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