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WO2001071275A1 - Procede de calibrage d'un instrument de mesure de sertissage et corps normalise destine a etre utilise dans le cadre dudit procede - Google Patents

Procede de calibrage d'un instrument de mesure de sertissage et corps normalise destine a etre utilise dans le cadre dudit procede Download PDF

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Publication number
WO2001071275A1
WO2001071275A1 PCT/GB2001/001190 GB0101190W WO0171275A1 WO 2001071275 A1 WO2001071275 A1 WO 2001071275A1 GB 0101190 W GB0101190 W GB 0101190W WO 0171275 A1 WO0171275 A1 WO 0171275A1
Authority
WO
WIPO (PCT)
Prior art keywords
jaws
standardised
gauge
telescopic member
contact
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.)
Ceased
Application number
PCT/GB2001/001190
Other languages
English (en)
Inventor
Anthony Stanford
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.)
Consort Medical Ltd
Original Assignee
Bespak PLC
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 Bespak PLC filed Critical Bespak PLC
Priority to AU40886/01A priority Critical patent/AU4088601A/en
Publication of WO2001071275A1 publication Critical patent/WO2001071275A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • G01B3/00—Measuring instruments characterised by the use of mechanical techniques
    • G01B3/30—Bars, blocks, or strips in which the distance between a pair of faces is fixed, although it may be preadjustable, e.g. end measure, feeler strip
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/30—Measuring arrangements characterised by the use of mechanical techniques for measuring the deformation in a solid, e.g. mechanical strain gauge

Definitions

  • the present invention relates to a method of calibrating a crimp measuring gauge and the provision of a standardised body for such calibration.
  • a popular form of dispensing apparatus for dispensing, in particular, pharmaceutical products is a metering valve attached to a dispensing container.
  • Such dispensing apparatus are used in particular for dispensing pharmaceutical products in the form of aerosols.
  • One such use is in the treatment of asthmatic conditions by the delivery of a pharmaceutical product held in suspension or in solution in a volatile propellant stored in the dispensing container as an aerosol.
  • the metering valve is assembled with the dispensing container and retained thereon by use of a cap or ferrule which is crimped around the open neck of the dispensing container. It is important that a high quality seal is obtained between the metering valve and the dispensing container to prevent loss of propellant and product during the storage life and useable life of the dispensing apparatus.
  • an elastomeric gasket is provided at the contact surface between the metering valve and the open neck of the dispensing container. The crimping action of the ferrule around the open end of the dispensing container compresses the elastomeric gasket, forming a gas-tight seal.
  • the degree of compression of the elastomeric gasket is an important factor in the quality of the seal between the metering valve and the dispensing apparatus.
  • a crimp measuring gauge for this purpose. The gauge operates on the principle that the greater the degree of compression of the elastomeric gasket, i.e., the greater the crimp, the shorter the axial distance will be between an upper face of the cap or ferrule of the metering valve and a position on the neck of the crimped cap or ferrule of a set diameter.
  • a known crimp measuring gauge 1 is shown in Figures 1 and 2.
  • the gauge 1 comprises a housing 7 having a number of dependant jaws 3 circumferentially located about a longitudinal axis Y 1 and which are inwardly pivotable from an open position as shown in Figure 2 to a closed position as shown in Figure 1 to engage a dispensing apparatus 30 when a collet 9 is moved axially along the jaws 3.
  • the jaws 3 are sprung so as to be biassed into their open position.
  • the gauge 1 also comprises a telescopic sleeve member 8 as best seen in Figure 3 which is biassed by a spring or similar into an extended position, but is retractable axially into housing 7.
  • a display 6 is provided for displaying a measure, preferably a direct linear measurement, of the degree of retraction of the telescopic sleeve 8.
  • a measure preferably a direct linear measurement
  • a known standardised body 20 for use in calibrating the crimp measuring gauge 1 is shown in
  • the standardised body 20 comprises a generally cylindrical portion 21 having a flange 21 of enlarged diameter and of thickness X.
  • the transverse faces 24, 25 of the flange 21 are perpendicular to the longitudinal axis Y 2 of the body 20.
  • the standardised body 20 is inserted between the jaws 3 of the crimp measuring gauge 1 where it contacts and axially displaces the telescopic sleeve 8 relative to the housing 7.
  • the collet 9 of the crimp measuring gauge 1 is then axially slid over the jaws 3 to pivot the jaws 3 into their closed position.
  • the standardised body 20 is then released and the biassing force of the telescopic sleeve 8 of the crimp measuring gauge 1 urges the transverse face 24 of flange 21 of the standardised body 20 into contact with the jaws 3. as shown in Figure 3.
  • the reading on the dial gauge 6 of the crimp measuring gauge is then read. Since the axial dimension X of the flange 21 is known, the reading may be used to calibrate the crimp measuring gauge 1.
  • the present invention provides a method of calibrating a crimp measuring gauge of the type comprising a housing, a plurality of pivotable jaws circumferentially located about a longitudinal axis, a collet enclosing the jaws and slidable relative thereto to pivot the jaws between open and closed positions, and a longitudinally orientated telescopic member which is biassed into a fully extended position, the telescopic member being operatively coupled to a display means for indicating the axial displacement of the telescopic member, the method comprising the steps of inserting a standardised body of known shape and size into the gauge to contact and axially displace the telescopic member relative to the housing, sliding the collet so as to pivot the jaws to their closed position, releasing the standardised body such that the telescopic member urges the standardised body into contact with the jaw
  • the invention also provides apparatus for measuring crimp height comprising a gauge comprising a housing, a plurality of pivotable jaws circumferentially located about a longitudinal axis, a collet enclosing the jaws and slidable relative thereto to pivot the jaws between open and closed positions, and a longitudinally orientated telescopic member which is biassed into a fully extended position, the telescopic member being operatively coupled to a display means for indicating the axial displacement of the telescopic member; and one or more standardised bodies each comprising a generally cylindrical body having a waisted portion.
  • Figure 1 is a perspective view of a known crimp measuring gauge being used to measure the crimp of a dispensing apparatus
  • Figure 2 is a perspective view of the crimp measuring gauge of Figure 1 with a known standardised body
  • Figure 3 is a cross-sectional view of a known standardised member engaged in the jaws of the crimp measuring gauge
  • Figure 4 is a cross-sectional view of a standardised body according to the present invention engaged with the jaws of the crimp measuring gauge;
  • Figure 5 is a cross-sectional view of the standardised body of Figure 4.
  • a standardised body 10 according to the present invention as shown in Figures 4 and 5 comprises a generally cylindrical body 12 having a side wall 13 with a waisted portion 11 of reduced diameter.
  • the waisted portion 11 of the side wall 13 has a generally concavely curved surface 14 which is formed so as to accurately mirror the shape and dimensions of the neck portion of the dispensing apparatus 30 on which the calibrated gauge 1 will be used.
  • the external dimensions of the standardised body mirror the external dimensions of the dispensing apparatus 30.
  • the standardised body 10 may be manufactured from any suitable material having the necessary hardness and durability, for example, hardened steel.
  • the gauge 1 is calibrated as follows:
  • the collet 9 is axially slid upwardly in the direction of the display 6 to allow the jaws 3 to spring apart into their open position;
  • the standardised body 10 is inserted into the gauge 1 between the jaws 3 with the longitudinal axis Y 1 of the gauge 1 substantially aligned with the longitudinal axis Y 2 of the standardised body 10, so as to contact and axially displace the telescopic sleeve 8 relative to the housing 7; Whilst the standardised body 10 is held in position relative to the jaws 3, the collet 9 is slid axially in the direction away from the display 6 so as to pivot the jaws 3 into their closed position such that the jaws 3 are axially aligned with the waisted portion 11.
  • the standardised body 10 is released such the biassing force of the telescopic sleeve 8 urges the standardised body 8 firmly into contact with the jaws 3. Consequently, the standardised body is retained both axially and radially relative to the gauge 1; The display is read to determine the calibration factor.
  • the point of contact between the jaws 3 and the standardised body 10 is on curved surface 14.
  • the tangent to curved surface 14 is at an angle ⁇ to the longitudinal axis Y 2 of the standardised body 10.
  • Angle is between 1 and 89 degrees.
  • angle ⁇ is between 30 and 60 degrees.
  • the contact of the jaws 3 on such an inclined surface fixes the position of the standardised body 10 relative to the gauge 1 in both the radial and axial directions.
  • the standardised body is therefore able to calibrate the gauge 1 for inconsistences in both radial and axial dimensions compared to the known standardised body 20 which can only calibrate the gauge 1 for inconsistencies in the axial dimension.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)

Abstract

La présente invention concerne un procédé de calibrage d'un instrument (1) de mesure de sertissage du type de ceux qui comprennent un logement (7), une pluralité de mâchoires pivotantes (3) montées circonférentiellement autour d'un axe longitudinal (Y1), une douille (9) de serrage qui recouvre les mâchoires et qui coulisse par rapport à celles-ci de manière à faire pivoter lesdites mâchoires entre une position ouverte et une position fermer, et vice-versa, et un élément télescopique (8) d'orientation longitudinale contraint en position de déploiement total. Ledit élément télescopique est fonctionnellement couplé à des moyens (6) d'affichage destinés à indiquer le déplacement axial de l'élément télescopique. Le procédé selon l'invention consiste à insérer un corps normalisé (10) de forme et de taille connue dans l'instrument (1) de mesure de manière à toucher et à déplacer axialement l'élément télescopique (8) par rapport au logement (7), puis à faire coulisser la douille (9) de manière à faire passer les mâchoires (3) en position fermée. Ensuite, on lâche le corps normalisé de manière que l'élément télescopique pousse ledit corps normalisé au contact des mâchoires et le positionne ainsi de façon fixe à la fois radialement et longitudinalement à l'instrument de mesure. On utilise alors les moyens d'affichage pour calibrer l'instrument de mesure.
PCT/GB2001/001190 2000-03-21 2001-03-19 Procede de calibrage d'un instrument de mesure de sertissage et corps normalise destine a etre utilise dans le cadre dudit procede Ceased WO2001071275A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU40886/01A AU4088601A (en) 2000-03-21 2001-03-19 A method of calibrating a crimp measuring gauge and a standardised body for use in such method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0006823A GB2360590B (en) 2000-03-21 2000-03-21 A method of calibrating a crimp measuring gauge and a standardised body for use in such method
GB0006823.9 2000-03-21

Publications (1)

Publication Number Publication Date
WO2001071275A1 true WO2001071275A1 (fr) 2001-09-27

Family

ID=9888107

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2001/001190 Ceased WO2001071275A1 (fr) 2000-03-21 2001-03-19 Procede de calibrage d'un instrument de mesure de sertissage et corps normalise destine a etre utilise dans le cadre dudit procede

Country Status (3)

Country Link
AU (1) AU4088601A (fr)
GB (1) GB2360590B (fr)
WO (1) WO2001071275A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104390565A (zh) * 2014-12-09 2015-03-04 川铁电气（天津）集团有限公司 断路器手车动静触头接触深度测量方法
CN105423840A (zh) * 2015-11-23 2016-03-23 重庆渝记涵诚机械制造有限公司 用于检测火花塞深度的检具
CN110196011A (zh) * 2018-02-27 2019-09-03 中航光电科技股份有限公司 一种连接螺帽锁紧凹坑深度检测工装及检测方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4879819A (en) * 1988-10-05 1989-11-14 Crawford Fitting Company Gauge for coupling component
US4967173A (en) * 1989-08-21 1990-10-30 Hewlett-Packard Company Short airline calibration standards and methods for error-corrected microwave network analysis

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2406308C2 (de) * 1974-02-09 1975-08-21 Kurt 7502 Malsch Heck Gerät zum Messen von AuBenkegeln und -durchmessern
BE1003506A3 (nl) * 1989-10-25 1992-04-07 Faidherbe S A Ets Ijkmaat voor meettoestel met verschuifbare nonius.
EP0964485A1 (fr) * 1998-06-11 1999-12-15 The Whitaker Corporation Dispositif pour mesurer la hauteur de sertissage

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4879819A (en) * 1988-10-05 1989-11-14 Crawford Fitting Company Gauge for coupling component
US4967173A (en) * 1989-08-21 1990-10-30 Hewlett-Packard Company Short airline calibration standards and methods for error-corrected microwave network analysis

Also Published As

Publication number Publication date
GB2360590B (en) 2002-03-06
GB0006823D0 (en) 2000-05-10
AU4088601A (en) 2001-10-03
GB2360590A (en) 2001-09-26

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