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 fluidInfo
- 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
Links
- 239000012530 fluid Substances 0.000 title abstract 3
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.
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)
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 |
-
1957
- 1957-01-22 GB GB234057A patent/GB813497A/en not_active Expired
Cited By (14)
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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