GB513771A - Improvements in or relating to electrical liquid volume indicators - Google Patents
Improvements in or relating to electrical liquid volume indicatorsInfo
- Publication number
- GB513771A GB513771A GB3052138A GB3052138A GB513771A GB 513771 A GB513771 A GB 513771A GB 3052138 A GB3052138 A GB 3052138A GB 3052138 A GB3052138 A GB 3052138A GB 513771 A GB513771 A GB 513771A
- Authority
- GB
- United Kingdom
- Prior art keywords
- liquid
- indicator
- oscillator
- liquid volume
- waymouth
- 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
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
- G01F23/26—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 variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
- G01F23/263—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 variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Level Indicators Using A Float (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
513,771. Electric tests. WAYMOUTH, H., and WAYMOUTH GAUGES & INSTRUMENTS, Ltd. April 19, 1938, No. 30521. Divided out of 513,754. [Class 37] A liquid volume indicator of the variable capacitance type comprises one or more parts of condenser plates 13, 14, which may be spaced edge-to-edge lengthwise of the liquid container, the arrangement minimising errors in reading when the container is tilted. In order to maintain a-linear relationship between volume of liquid and condenser plate area immersed, the plates are non-uniformly perforated and/or non-uniformly spaced apart. Fig. 3 shows an indicator circuit comprising an oscillator connected to an amplifier-detector through a filter circuit 38...40. The liquid container is shown at 10, and variations of the capacitance with liquid volume allow the oscillator current to pass the filter circuit and energize the indicator coil 48. This coil is mechanically coupled with a core 52, movement of which restores the normal cut-off frequency relationship between the filter and oscillator. Reference is made to the use of this invention on aircraft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3052138A GB513771A (en) | 1938-04-19 | 1938-04-19 | Improvements in or relating to electrical liquid volume indicators |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3052138A GB513771A (en) | 1938-04-19 | 1938-04-19 | Improvements in or relating to electrical liquid volume indicators |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB513771A true GB513771A (en) | 1939-10-20 |
Family
ID=10308961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3052138A Expired GB513771A (en) | 1938-04-19 | 1938-04-19 | Improvements in or relating to electrical liquid volume indicators |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB513771A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2805371A (en) * | 1955-10-24 | 1957-09-03 | Aro Equipment Corp | Capacitance sensing element |
| US3048775A (en) * | 1958-01-10 | 1962-08-07 | Wayne Kerr Lab Ltd | Apparatus for measuring small distances |
| GB2127552A (en) * | 1982-09-10 | 1984-04-11 | Nissan Motor | Liquid quantity sensor of capacitor type and method of producing same |
| US5542300A (en) * | 1994-01-24 | 1996-08-06 | Setra Systems, Inc. | Low cost, center-mounted capacitive pressure sensor |
-
1938
- 1938-04-19 GB GB3052138A patent/GB513771A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2805371A (en) * | 1955-10-24 | 1957-09-03 | Aro Equipment Corp | Capacitance sensing element |
| US3048775A (en) * | 1958-01-10 | 1962-08-07 | Wayne Kerr Lab Ltd | Apparatus for measuring small distances |
| GB2127552A (en) * | 1982-09-10 | 1984-04-11 | Nissan Motor | Liquid quantity sensor of capacitor type and method of producing same |
| US4519012A (en) * | 1982-09-10 | 1985-05-21 | Nissan Motor Company, Limited | Liquid quantity sensor of capacitor type and method of producing same |
| US5542300A (en) * | 1994-01-24 | 1996-08-06 | Setra Systems, Inc. | Low cost, center-mounted capacitive pressure sensor |
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