GB813497A - Improvements in apparatus for detecting the presence or absence at a location of a body of fluid - Google Patents

Improvements in apparatus for detecting the presence or absence at a location of a body of fluid

Info

Publication number
GB813497A
GB813497A GB234057A GB234057A GB813497A GB 813497 A GB813497 A GB 813497A GB 234057 A GB234057 A GB 234057A GB 234057 A GB234057 A GB 234057A GB 813497 A GB813497 A GB 813497A
Authority
GB
United Kingdom
Prior art keywords
fluid
absence
detecting
location
jan
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
GB234057A
Inventor
Bernard Augustine Worswick
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.)
Danks Holding Ltd
Original Assignee
Bailey Meters and Controls Ltd
Filing date
Publication date
Application filed by Bailey Meters and Controls Ltd filed Critical Bailey Meters and Controls Ltd
Publication of GB813497A publication Critical patent/GB813497A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/296—Acoustic waves
    • G01F23/2965—Measuring attenuation of transmitted waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/296—Acoustic waves
    • G01F23/2961—Acoustic waves for discrete levels

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

813,497. Transistor oscillator circuits. BAILEY METERS & CONTROLS Ltd. Jan. 22, 1958 [Jan. 22, 1957], No. 2340/57. Drawings to Specification. Class 40 (6). [Also in Group XXXVIII] A resistance-capacity amplifier is caused to operate as an oscillator at sonic or ultrasonic frequency by means of an acoustic positive feedback loop between a transducer in the output and a second transducer in the input, there being a path of fluid between the transducers. The amplifier is used in. an apparatus for detecting the presence or absence of the fluid path.
GB234057A 1957-01-22 Improvements in apparatus for detecting the presence or absence at a location of a body of fluid Expired GB813497A (en)

Publications (1)

Publication Number Publication Date
GB813497A true GB813497A (en) 1959-05-21

Family

ID=1627255

Family Applications (1)

Application Number Title Priority Date Filing Date
GB234057A Expired GB813497A (en) 1957-01-22 Improvements in apparatus for detecting the presence or absence at a location of a body of fluid

Country Status (1)

Country Link
GB (1) GB813497A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3079596A (en) * 1960-03-17 1963-02-26 Duane E Atkinson Acoustic level sensing system
US3213438A (en) * 1962-01-11 1965-10-19 Gen Motors Corp Feedback controlled sonic liquid detector
US3520186A (en) * 1968-03-11 1970-07-14 Nat Sonics Corp Ultrasonic fluid interface sensing
DE2949162A1 (en) * 1979-12-06 1981-06-11 Endress U. Hauser Gmbh U. Co, 7867 Maulburg Filling level detector using oscillatory rod - monitors oscillation amplitude to indicate level due to damping effect
US4273178A (en) * 1979-07-09 1981-06-16 Caterpillar Tractor Co. Vibrator casting system with feedback
DE3002118A1 (en) * 1980-01-22 1981-07-23 Josef Heinrichs Meßgerätebau, 5000 Köln Ultrasonic fluid level indicator - has sensor rod or tube of material distinctly distinguishing between ultrasound transfer media
US4545245A (en) * 1983-11-09 1985-10-08 Simmonds Precision Products, Inc. Liquid level sensor using sonic methods
GB2177510A (en) * 1985-07-01 1987-01-21 Partridge Wilson And Company L Detecting the presence or absence of a liquid
GB2179738A (en) * 1985-08-20 1987-03-11 Formula Systems Ltd Fluid level responsive apparatus
US4897822A (en) * 1989-02-10 1990-01-30 Korten Jerome B PLL sonic bilge pump switch
WO2011159711A1 (en) * 2010-06-15 2011-12-22 Illinois Tool Works Inc. Ultrasonic liquid level sensor with improved temperature range

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3079596A (en) * 1960-03-17 1963-02-26 Duane E Atkinson Acoustic level sensing system
US3213438A (en) * 1962-01-11 1965-10-19 Gen Motors Corp Feedback controlled sonic liquid detector
US3520186A (en) * 1968-03-11 1970-07-14 Nat Sonics Corp Ultrasonic fluid interface sensing
US4273178A (en) * 1979-07-09 1981-06-16 Caterpillar Tractor Co. Vibrator casting system with feedback
DE2949162A1 (en) * 1979-12-06 1981-06-11 Endress U. Hauser Gmbh U. Co, 7867 Maulburg Filling level detector using oscillatory rod - monitors oscillation amplitude to indicate level due to damping effect
DE3002118A1 (en) * 1980-01-22 1981-07-23 Josef Heinrichs Meßgerätebau, 5000 Köln Ultrasonic fluid level indicator - has sensor rod or tube of material distinctly distinguishing between ultrasound transfer media
US4545245A (en) * 1983-11-09 1985-10-08 Simmonds Precision Products, Inc. Liquid level sensor using sonic methods
GB2177510A (en) * 1985-07-01 1987-01-21 Partridge Wilson And Company L Detecting the presence or absence of a liquid
GB2179738A (en) * 1985-08-20 1987-03-11 Formula Systems Ltd Fluid level responsive apparatus
GB2179738B (en) * 1985-08-20 1989-08-09 Formula Systems Ltd Fluid level responsive apparatus
AU590602B2 (en) * 1985-08-20 1989-11-09 Formula Systems Limited Fluid level responsive apparatus
US4897822A (en) * 1989-02-10 1990-01-30 Korten Jerome B PLL sonic bilge pump switch
WO2011159711A1 (en) * 2010-06-15 2011-12-22 Illinois Tool Works Inc. Ultrasonic liquid level sensor with improved temperature range
US9121746B2 (en) 2010-06-15 2015-09-01 Illinois Tool Works Inc. Liquid level sensor with improved temperature range

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