GB1367108A - Apparatus for measuring a predetermined characteristic of sheet mater ial - Google Patents

Apparatus for measuring a predetermined characteristic of sheet mater ial

Info

Publication number
GB1367108A
GB1367108A GB5872171A GB5872171A GB1367108A GB 1367108 A GB1367108 A GB 1367108A GB 5872171 A GB5872171 A GB 5872171A GB 5872171 A GB5872171 A GB 5872171A GB 1367108 A GB1367108 A GB 1367108A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
diaphragms
shoe
paper
moisture content
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
GB5872171A
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.)
Honeywell Measurex Corp
Original Assignee
Measurex Corp
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 Measurex Corp filed Critical Measurex Corp
Publication of GB1367108A publication Critical patent/GB1367108A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
    • G01B7/10—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using magnetic means, e.g. by measuring change of reluctance
    • G01B7/107—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using magnetic means, e.g. by measuring change of reluctance for measuring objects while moving

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Length-Measuring Devices Using Wave Or Particle Radiation (AREA)

Abstract

1367108 Measuring thickness of paper MEASUREX CORP 17 Dec 1971 [14 Jan 1971] 58721/71 Heading G1N The thickness of a travelling paper web 18 is measured by interposing it between two parts of a magnetic circuit carried on respective rubber diaphragms 23, 23' movable towards and away from the paper by the application of gas-pressure and vacuum respectively. The magnetic circuit comprises a U-shaped ferrite core 71 carrying two windings 74, 75 connected in series with a capacitor in the feedback circuit of an oscillator Fig. 5 (not shown) to control its frequency. The legs of the core extend through the diaphragm 23 and through a ruby or sapphire shoe 76. Leg 72 is rigidly fixed in the shoe by epoxy glue and leg 73 is fixed by room-temperature-vulcanizing rubber to accommodate thermal expansion. A ferrite shoe 81, possibly of a single crystal, on diaphragm 23' completes the magnetic circuit. Stainless steel bearing rings 84, 84' and annular plates 86, 86' increase stability of the diaphragms. Electrostatic build-up is prevented by grounded plates 87, 88 or the diaphragms may be made of electrically conductive rubber. Each diaphragm has an annular or horse-shoe shaped corrugation 24 near its periphery which is clamped between a plastics ring 26 and a retaining ring 27. Piston valves 48, 49 are operable by a rotational solenoid 54 to connect the chamber 21 above the diaphragm 23 to the vacuum or pressure side of a vortex fan pump (36), Fig. 3 (not shown) for raising or lowering the diaphragm 23. The surrounding hood includes two other diaphragms 62, 63 and is purged with dry nitrogen led in at 15 and escaping through various leaks. To adjust the output of the pump, different apertures (66) in a pivoted disc (64) are selected to control the size of a leak (67). The apparatus, together with other apparatus responsive to basis weight and moisture content, is traversed across the paper on beams (11, 12), Fig. 1 (not shown). The moisture content measurement may be used to correct the thickness measurement to a standard moisture content.
GB5872171A 1971-01-14 1971-12-17 Apparatus for measuring a predetermined characteristic of sheet mater ial Expired GB1367108A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10635071A 1971-01-14 1971-01-14

Publications (1)

Publication Number Publication Date
GB1367108A true GB1367108A (en) 1974-09-18

Family

ID=22310930

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5872171A Expired GB1367108A (en) 1971-01-14 1971-12-17 Apparatus for measuring a predetermined characteristic of sheet mater ial

Country Status (7)

Country Link
JP (1) JPS5146622B1 (en)
CA (1) CA929597A (en)
CH (1) CH551613A (en)
DE (1) DE2201407C3 (en)
FI (1) FI55262C (en)
GB (1) GB1367108A (en)
SE (1) SE371493B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2121544A (en) * 1982-06-04 1983-12-21 Sidco Sa Eddy-current testing apparatus for checking features of parts
WO2012080010A1 (en) * 2010-12-16 2012-06-21 Voith Patent Gmbh Determination of weight per unit area of a material web using a microwave sensor, the distances between the material web and the surfaces of the microwave sensor being adjusted to a constant value by means of air cushions
CN114877833A (en) * 2020-09-30 2022-08-09 张淑敏 Shaft part detection device

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1551607A (en) * 1977-03-03 1979-08-30 Measurex Corp Contacting caliper gauges
JPS5446658A (en) * 1977-09-21 1979-04-12 Shizuo Seguchi Board combined structure
JPS54175425U (en) * 1978-05-30 1979-12-11
JPS5895073U (en) * 1981-12-21 1983-06-28 日本電気株式会社 hybrid integrated circuit
DE8711754U1 (en) * 1987-08-29 1987-10-29 Hoesch Ag, 4600 Dortmund Hand-held measuring device
DE20307042U1 (en) * 2003-05-07 2003-09-11 Fagus-GreCon Greten GmbH & Co. KG, 31061 Alfeld Device for assigning measuring sensors to a quantity of material carried past the sensors
DE102005054593B4 (en) * 2005-11-14 2018-04-26 Immobiliengesellschaft Helmut Fischer Gmbh & Co. Kg Measuring probe for measuring the thickness of thin layers

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2121544A (en) * 1982-06-04 1983-12-21 Sidco Sa Eddy-current testing apparatus for checking features of parts
WO2012080010A1 (en) * 2010-12-16 2012-06-21 Voith Patent Gmbh Determination of weight per unit area of a material web using a microwave sensor, the distances between the material web and the surfaces of the microwave sensor being adjusted to a constant value by means of air cushions
CN103370472A (en) * 2010-12-16 2013-10-23 沃依特专利有限责任公司 Method of determination of weight per unit area of a material web using a microwave sensor, the distances between the material web and the surfaces of the microwave sensor being adjusted to a constant value by means of air cushions
US9279713B2 (en) 2010-12-16 2016-03-08 Voith Patent Gmbh Determination of basis weight of a material web using a microwave sensor, whereby the distance between the material web and the surfaces of the microwave sensor is being adjusted to a constant value by air cushions
CN114877833A (en) * 2020-09-30 2022-08-09 张淑敏 Shaft part detection device
CN114877833B (en) * 2020-09-30 2024-04-30 益阳德恒纺织实业有限公司 Spinning machine shaft part detection device

Also Published As

Publication number Publication date
DE2201407C3 (en) 1973-09-20
SE371493B (en) 1974-11-18
DE2201407B2 (en) 1973-02-22
CH551613A (en) 1974-07-15
FI55262C (en) 1979-06-11
FI55262B (en) 1979-02-28
DE2201407A1 (en) 1972-07-27
JPS5146622B1 (en) 1976-12-10
CA929597A (en) 1973-07-03

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years