GB1312433A - Liquid level detectors and capacitive propes therefor - Google Patents

Liquid level detectors and capacitive propes therefor

Info

Publication number
GB1312433A
GB1312433A GB169271A GB1312433DA GB1312433A GB 1312433 A GB1312433 A GB 1312433A GB 169271 A GB169271 A GB 169271A GB 1312433D A GB1312433D A GB 1312433DA GB 1312433 A GB1312433 A GB 1312433A
Authority
GB
United Kingdom
Prior art keywords
liquid level
capacitive
propes
therefor
level detectors
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
GB169271A
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.)
Emerson Process Management Ltd
Original Assignee
Rosemount Engineering Co 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 Rosemount Engineering Co Ltd filed Critical Rosemount Engineering Co Ltd
Publication of GB1312433A publication Critical patent/GB1312433A/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
    • G01F23/268—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 mounting arrangements of probes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D1/00—Treatment of filament-forming or like material
    • D01D1/06—Feeding liquid to the spinning head
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/05—Filamentary, e.g. strands

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Textile Engineering (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Dry Development In Electrophotography (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

1312433 Measuring liquid level ROSEMOUNT ENG CO Ltd 22 Dec 1971 [13 Jan 1971] 1692/71 Heading G1N A capacitive probe for liquid level detection comprises an insulating tube 10, to the inside of which has been applied at least one strip 12 of self-adhesive metal foil tape, the tube being closed at one end 11 and filled with expanded plastics foam. The probe may be made up from stock lengths of polypropylene, U.P.V.C., P.T.F.E., or glass tube and the metal tape applied by a spring-loaded roller. The capacitance between the stop 12 and the liquid or the capacitance between two such diametrically opposite stops (22, 23) may be measured.
GB169271A 1971-03-16 1971-01-13 Liquid level detectors and capacitive propes therefor Expired GB1312433A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GB700971 1971-03-16
GB701071 1971-03-16
GB169272 1972-01-13
GB169271A GB1386406A (en) 1971-03-16 1972-01-13 Melt spinning of synthetic textile filaments
CH1417572A CH552074A (en) 1971-03-16 1972-09-28 CELL FOR THE SPINNING OF SYNTHETIC FIBERS.

Publications (1)

Publication Number Publication Date
GB1312433A true GB1312433A (en) 1973-04-04

Family

ID=27509494

Family Applications (2)

Application Number Title Priority Date Filing Date
GB169271A Expired GB1312433A (en) 1971-03-16 1971-01-13 Liquid level detectors and capacitive propes therefor
GB169271A Expired GB1386406A (en) 1971-03-16 1972-01-13 Melt spinning of synthetic textile filaments

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB169271A Expired GB1386406A (en) 1971-03-16 1972-01-13 Melt spinning of synthetic textile filaments

Country Status (4)

Country Link
CH (2) CH560770A5 (en)
DE (1) DE2212389A1 (en)
FR (1) FR2130337B1 (en)
GB (2) GB1312433A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996024823A2 (en) * 1995-02-06 1996-08-15 Meridian Instruments B.V. Apparatus for capacitive measurements
DE102005041397A1 (en) * 2005-09-01 2007-03-08 Bayerische Motoren Werke Ag Metallic molding tool for producing plastic parts, has recess closed by protection cover to inner side of lower part, where cover is provided with external thread that is screwed in internal thread provided at front side of recess
WO2020165567A3 (en) * 2019-02-11 2020-11-12 Aspen Pumps Limited Improved liquid sensor
IT202200010988A1 (en) * 2022-05-25 2023-11-25 blasiis antonio de New instrument for measuring the height of a liquid present in a tank by means of a capacity measurement

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE793642A (en) * 1972-01-03 1973-07-03 Basf Ag SPIN-STRETCH TEXTURIZATION PROCESS FOR OBTAINING TEXTURED YARNS
ATE23886T1 (en) * 1981-06-11 1986-12-15 Basf Corp PROCESS FOR MAKING A TEXTURED MULTIFILAMENT YARN.
US4709878A (en) * 1984-04-17 1987-12-01 British Aerospace Plc Fin assembly deployment spring
FR2775299B1 (en) * 1998-02-26 2000-03-17 Icbt Roanne FALSE TORSION YARN AND TEXTURING MACHINE
DE19829272A1 (en) * 1998-07-01 2000-01-05 Rieter Automatik Gmbh Heating system for melt-carrying parts
CN104264254A (en) * 2014-09-30 2015-01-07 张家港市金立纳米高弹材料有限公司 Melt extrusion device for artificial turf fibers
CN104294386A (en) * 2014-09-30 2015-01-21 张家港市金立纳米高弹材料有限公司 Screw extrusion device for artificial grass
CN116007712B (en) * 2023-03-27 2023-06-16 河北省地质矿产勘查开发局第五地质大队(河北省海洋地质环境调查中心) Hydrologic engineering geology water level monitoring devices

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996024823A2 (en) * 1995-02-06 1996-08-15 Meridian Instruments B.V. Apparatus for capacitive measurements
NL9500217A (en) * 1995-02-06 1996-09-02 Meridian Instr Bv Capacitive measuring device.
WO1996024823A3 (en) * 1995-02-06 1996-09-26 Meridian Instr Bv Apparatus for capacitive measurements
DE102005041397A1 (en) * 2005-09-01 2007-03-08 Bayerische Motoren Werke Ag Metallic molding tool for producing plastic parts, has recess closed by protection cover to inner side of lower part, where cover is provided with external thread that is screwed in internal thread provided at front side of recess
WO2020165567A3 (en) * 2019-02-11 2020-11-12 Aspen Pumps Limited Improved liquid sensor
CN113924466A (en) * 2019-02-11 2022-01-11 艾斯本泵业有限公司 Improved liquid sensor
US11971287B2 (en) 2019-02-11 2024-04-30 Aspen Pumps Limited Liquid sensor
IT202200010988A1 (en) * 2022-05-25 2023-11-25 blasiis antonio de New instrument for measuring the height of a liquid present in a tank by means of a capacity measurement

Also Published As

Publication number Publication date
FR2130337B1 (en) 1974-12-13
GB1386406A (en) 1975-03-05
CH552074A (en) 1974-07-31
FR2130337A1 (en) 1972-11-03
CH560770A5 (en) 1975-04-15
DE2212389A1 (en) 1972-09-28

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees