GB693521A - Improvements in or relating to apparatus for determining the position of a mercury meniscus - Google Patents

Improvements in or relating to apparatus for determining the position of a mercury meniscus

Info

Publication number
GB693521A
GB693521A GB447251A GB447251A GB693521A GB 693521 A GB693521 A GB 693521A GB 447251 A GB447251 A GB 447251A GB 447251 A GB447251 A GB 447251A GB 693521 A GB693521 A GB 693521A
Authority
GB
United Kingdom
Prior art keywords
tube
bridge
mercury
coil
feb
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
GB447251A
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.)
BOC Group Ltd
Original Assignee
British Oxigen 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 British Oxigen Ltd filed Critical British Oxigen Ltd
Priority to GB447251A priority Critical patent/GB693521A/en
Publication of GB693521A publication Critical patent/GB693521A/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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/2006—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils
    • G01D5/202—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils by movable a non-ferromagnetic conductive element

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

693,521. Electric indicating systems. BRITISH OXYGEN CO., Ltd., and COCKETT, A. H. Feb. 4, 1952 [Feb. 23, 1951], No. 4472/51. Class 40 (i). Variations in the height of a mercury column 2 in a closed non-magnetic container, e.g., a tube 1, are measured by the corresponding impedance changes produced in an A.C. energized coil 5 surrounding the tube. To enhance the sensitivity of the device an iron wire 3 may be held centrally within the tube 1, e.g., by springs 4, and a further shorter coil 6 series connected with coil 5 may embrace the latter at a position corresponding to a predetermined (zero) position of the mercury meniscus. For measuring fluid-flow by means of a differential manometer, each of the limbs of the manometer is constructed as shown in Fig. 1, and the series combination of coils 5, 6, on the two limbs connected in alternate arms L1-R1, L2-R2 of an impedance bridge, Fig. 2, fed through a constant output voltage transformer T1 and step-down transformer T2. The bridge is balanced at a predetermined mercury level, the galvanometer G then indicating deviations therefrom. Alternatively, a barreter may be used for ensuring a constant voltage supply to the bridge.
GB447251A 1951-02-23 1951-02-23 Improvements in or relating to apparatus for determining the position of a mercury meniscus Expired GB693521A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB447251A GB693521A (en) 1951-02-23 1951-02-23 Improvements in or relating to apparatus for determining the position of a mercury meniscus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB447251A GB693521A (en) 1951-02-23 1951-02-23 Improvements in or relating to apparatus for determining the position of a mercury meniscus

Publications (1)

Publication Number Publication Date
GB693521A true GB693521A (en) 1953-07-01

Family

ID=9777821

Family Applications (1)

Application Number Title Priority Date Filing Date
GB447251A Expired GB693521A (en) 1951-02-23 1951-02-23 Improvements in or relating to apparatus for determining the position of a mercury meniscus

Country Status (1)

Country Link
GB (1) GB693521A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2108809A1 (en) * 1970-10-07 1972-05-26 Commissariat Energie Atomique Level meter - for liquid metals eg sodium at high temp
CN113358188A (en) * 2021-04-28 2021-09-07 华中科技大学 Salt cavern gas storage gas-liquid interface measuring method and system based on low-frequency electric signals

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2108809A1 (en) * 1970-10-07 1972-05-26 Commissariat Energie Atomique Level meter - for liquid metals eg sodium at high temp
CN113358188A (en) * 2021-04-28 2021-09-07 华中科技大学 Salt cavern gas storage gas-liquid interface measuring method and system based on low-frequency electric signals

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