GB513771A - Improvements in or relating to electrical liquid volume indicators - Google Patents

Improvements in or relating to electrical liquid volume indicators

Info

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
Application number
GB3052138A
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.)
WAYMOUTH GAUGES AND INSTR Ltd
Original Assignee
WAYMOUTH GAUGES AND INSTR Ltd
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 WAYMOUTH GAUGES AND INSTR Ltd filed Critical WAYMOUTH GAUGES AND INSTR Ltd
Priority to GB3052138A priority Critical patent/GB513771A/en
Publication of GB513771A publication Critical patent/GB513771A/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
    • G01F23/26—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.
GB3052138A 1938-04-19 1938-04-19 Improvements in or relating to electrical liquid volume indicators Expired GB513771A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (5)

* Cited by examiner, † Cited by third party
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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