EP0060287A1 - Dimension gauge having memory facilities - Google Patents

Dimension gauge having memory facilities

Info

Publication number
EP0060287A1
EP0060287A1 EP81902638A EP81902638A EP0060287A1 EP 0060287 A1 EP0060287 A1 EP 0060287A1 EP 81902638 A EP81902638 A EP 81902638A EP 81902638 A EP81902638 A EP 81902638A EP 0060287 A1 EP0060287 A1 EP 0060287A1
Authority
EP
European Patent Office
Prior art keywords
gauge
dimension
output
preset
mode
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.)
Withdrawn
Application number
EP81902638A
Other languages
German (de)
French (fr)
Inventor
Geoffrey John Gomme
Edgar Fletcher Robson
John Stanley Mitchell
Jeremy Thomas Georgeson
Norman Gerald
Nigel Robert Sweet
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.)
Je Baty & Co Ltd
Original Assignee
Je Baty & 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 Je Baty & Co Ltd filed Critical Je Baty & Co Ltd
Publication of EP0060287A1 publication Critical patent/EP0060287A1/en
Withdrawn legal-status Critical Current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
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • 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
    • G01B3/22—Feeler-pin gauges, e.g. dial gauges

Definitions

  • This invention relates to a dimension gauge and particularly, but not exclusively, to a linear gauge as exemplified by the known engineer's dial gauge and micrometer.
  • the object of the invention is to provide an improved construction of dimension gauge having memory facilities which enable the user to insert certain values, such as maximum and minimum tolerances and/or to take into account certain values which have prevously been inserted or read off during use of the gauge.
  • a dimension gauge comprises, in combination: (i) means for producing, by Moire fringe effect, a countable output related to relative movement of two gauge elements, (ii) microprocessor circuitry receiving the countable output, said circuitry including counter means for counting the output, numeric modifying means for modifying the counted output, and memory means capable of storing and providing access to stored counts and inserted values and/or instructions, and
  • a visual display means driven by the microprocessor circuitry.
  • the memory means may receive and provide access to, for example, maximum and/or minimum dimensions, and/or a previous reading or readings.
  • the micro-computer may be constructed to include means for the pre-setting of upper and/or lower limits, and to give rise to an appropriate visual indication as to a correct or incorrect dimension gauged.
  • the micro-computer may be constructed so that it is possible to insert a series of such dimension ranges so that when a series of workpieces are subsequently gauged, the instrument will give an indication of which range of dimensions that workpiece will fall within.
  • the microprocessor may be in the form of a micro-computer which may be associated with a custom chip containing, for example, a crystal frequency source and serving as a basic counter from which the remainder of the electronic circuitry operates.
  • a pulsed light signal for a LED light source of the Moire fringe means may conveniently serve as a clock for the remainder of the system.
  • Fig. 1 is a front elevation of the gauge;
  • Fig. 2 is a side elevantion;
  • Fig. 3 is a plan view;
  • Fig. 4 is a sectional elevation viewed on a first plane parallel to the front face of the gauge
  • Fig. 5 is a sectional elevation viewed on a second plane normal to the front face of the gauge;
  • Fig. 6 is a perspective elevation of two Moire fringe grating elements, seen in separated condition;
  • Fig. 7 is a front elevation of the assembled grating elements
  • Fig. 8 is an edge elevation of the assembled grating elements
  • Fig. 9 is a front elevation showing the grating assembly with light source LED's and photoreceptor transistors;
  • Fig. 10 is a schematic side elevation corresponding to Fig. 9;
  • Figs. 11a - 11d show the entire circuitry.
  • the gauge comprises a housing 1 with a front cover 2 having a keyboard 3 and a display 4, advantageously a liquid crystal display. From the lower end of the housing there extends a gauge stem 5 carrying a spindle 6 terminating in an exchangeable anvil 7. On the rear face of the housing 1 is a backplate 8 having a hole 9 to receive a securing bolt or the like for stand mounting. On the upper end of the housing 1 there is communication outlet 10, such as a multiple connector, terminal block, jack point or the like. Also on the upper end there is provided an accessory mounting point 11, e.g. for the addition of dead- weights for use in gauging depression of resilient materials.
  • Item 12 is a cover for a battery space.
  • the stem 5 is movable axially in an internal main frame of the housing 1 under the action of a coiled tension spring 13 which urges it towards its fully extended position. Axial end points of the movement of the stem 5 are determined by rubber buffers 14, 15.
  • a member 16 which holds the movable elongated grating of a pair of gratings suitable for creating the Moire fringe effect.
  • a pressure spring 17 serving to hold the two grating elements in rubbing contact, and a guidance spring 18 for the two grating elements.
  • a block 19 supports the stationary grating element or "index" 20, and photoreceptor transistors 21, and a further block 22 supports the pulsed light sources 23 (see Fig. 10).
  • a printed circuit board 24 serves to connect the light sources 23 and photo-receptors 21 to main circuit boards 25 and 26 (see Fig. 5). Batteries 27 are housed in the battery space 28.
  • the keyboard 3 comprises keys 29 for the operation of switch means 30 which are coupled through a printed circuit board 31 to the boards 25 and 26.
  • the display 4 comprises a liquid crystal element carried by clips on supports 32 and covered by a fascia 33.
  • the elongated movable grating element 34 moves with the stem 5.
  • the grating elements 20 and 34 are each made of glass with a diffraction grating formed thereon.
  • the grating elements are provided with edge strips 35, 36 of chromium to act as rubbing contacting faces and serving also to retain the two gratings at a predetermined very small air-filled spacing from each other.
  • FIG. 10 shows the pulsed LED light sources 23 which transmit their light through a transparent angled optical element 37 in which the direction of the rays of light is reversed through 180o so as to pass in the direction from the moving grating element 34 to the index grating element 20, and thence to the photoreceptor transistors 21.
  • the direction of movement of the lines and spaces of the Moire fringe effect is indicated by the arrow "A" in Fig. 9.
  • the photoreceptor transistors are arranged in two pairs.
  • a first pair (the right hand pair in Fig. 9) has its individual transistors spaced by a distance which is 180o of the cyclical spacing of the Moire fringe line/space pattern. Accordingly, the pair of transistors give a differential output signal which is greater, for a given light quantity, than would be obtained with a single transistor sensing the changes from light to dark.
  • the second pair (the left hand pair in Fig. 9) is arranged, along the line of movement of the fringe effect pattern, at a spacing which is 90o out of phase with the first pair. This arrangement permits the micro-computer to determine the direction of relative movement of the grating element at any instant.
  • a pulse generator 38 feeds the two LED light sources 23, 23 passing their light through the gratings 34, 20 to be received by the photoreceptor transistors 21,21 and 21,21.
  • the output from the transistors passes to a conditioning circuit 39 which feeds information in the form of square waves to a custom chip 40 and processor 41.
  • Connectors are provided from the keyboard PCB 31 to the remainder of the components. Output from the chip and processor are led to the display.
  • a first voltage regulator 43 provides a regulated nominal 3 volts to the processor 41, and a second voltage regulator 44 provides a regulated 5 volt supply.
  • the communications link 10 (see Fig. 1) is connected into the remainder of the circuitry.
  • the gauge will automatically revert to the mode of operation and display at the time of switch-off, including values of present tolerance +/-. If it is the first switch-on after battery insertion, this mode will be standard, and the display will directly indicate displacement, from zero position, with upward movement of the spindle regarded as "positive". The gauge is automatically re-zeroed at switch-on.
  • the zero or 'datum point' of the gauge can be repositioned by resting the spindle on a datum plane and pressing the zero/reset key.
  • the display will zero, if in 'standard mode', and max/min will both assume displayed value.
  • the direction v/hich the gauge regards as
  • the units can be changed from metric to imperial or vice versa by pressing the inch/mm key for change of unit of the display, and the appropriate unit flag (inch/mm) appears. All the values held in maximum/ minimum, tolerance +/- or preset memories, as well as the displayed value, are converted to the new unit.
  • the display may be changed from high to low resolution units and vice versa by pressing the resolution key for change of resolution into either imperial or metric units:
  • a diameter value may be displayed while reading a radius by pressing the diameter key. The displayed value is doubled and the diameter flag appears.
  • Memory values of tolerance +/- preset, and maximum/minimum are not affected but are used for calculation of display value before it is doubled, i.e. tolerance +/- modes causes "hi", "1o” and "pass” flags to appear at the same positions of the spindle whether in "Diameter” or not.
  • a preset value may be set and a preset mode entered, providing a "set” flag is not displayed, by pressing the preset key to enter “set preset” mode.
  • the "set” flag will appear on the display, along with “preset” flag flashing, and the value presently held in the preset memory is then displayed.
  • This figure can then be adjusted with the inc/dec. and +/- keys to reach a desired value for preset.
  • the figure is then set into the preset memory and the preset mode entered by re-pressing the preset key.
  • the preset mode is shown by the "set” flag disappearing and the "preset” flag becoming steady. If a unit of measure is changed while setting, conversion of a set figure is not carried out. However, if a unit is changed while not in “set", preset, and tolerance +/-, the memory figure is converted.
  • a tolerance + value can be set, and a tolerance + mode entered by using a similar process to the last described above, except that once the tolerance + mode is entered, the display shows "hi" or "pass” depending on the position of the spindle and the tolerance + value set.
  • a tolerance - value may be set and a tolerance - rode entered using a similar process to that described in the preceding paragraph.
  • a tolerance +/- or preset mode may be exited by selecting which mode is to be exited and pressing the appropriate key, i.e. Tol +/- or "preset”. "Set” appears and the selected mode flag flashes as when setting. Upon pressing the "mode off” key, the "set” and selected mode flag disappear and operation of the device reverts to the modes left selected.
  • a maximum or minium value may be viewed from within any mode. Pressing the maximum or minimum key causes the "Max” flag or “min” flag to appear and the display to show the value of maximum or minimum excursion of the spindle since the maximum or minimum memory was last reset or the device zeroed.
  • a maximum or minimum viewing mode may be exited and, while viewing maximum, the previous display mode may be restored by re-pressing the "max" key.
  • the "mode off” key may be pressed to achieve the same result, and similarly for minimum.
  • minimum When viewing maximum, minimum may be viewed by pressing the minimum key, and vice versa.
  • a maximum or minimum value may be reset, e.g. maximum may be reset to a current displayed value by pressing zero/reset whilst viewing the maximum value. This process clears any previous storage of a maximum value, and similarly for minimum value. It does not affect "zero" position.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Optical Transform (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

Un calibre lineaire digital utilise un effet de frange de Moire pour obtenir une sortie comptable concernant le mouvement relatif de deux elements de calibrage. Un circuit microprocesseur recoit la sortie, la compte et l'applique a un affichage visuel. Le microprocesseur permet la modification de la sortie, et possede aussi une memoire pouvant stocker et permettre l'acces a des comptages stockes et des valeurs et/ou instructions introduites, avant l'affichage d'un resultat final.A digital linear gauge uses a Moire fringe effect to obtain an accounting output regarding the relative movement of two calibration elements. A microprocessor circuit receives the output, counts it, and applies it to a visual display. The microprocessor allows modification of the output, and also has a memory capable of storing and allowing access to stored counts and values and/or instructions entered, before displaying a final result.

Description

DIMENSIONGAUGEHAVINGMEMORYFACILITIES
This invention relates to a dimension gauge and particularly, but not exclusively, to a linear gauge as exemplified by the known engineer's dial gauge and micrometer.
The object of the invention is to provide an improved construction of dimension gauge having memory facilities which enable the user to insert certain values, such as maximum and minimum tolerances and/or to take into account certain values which have prevously been inserted or read off during use of the gauge.
According to the present invention a dimension gauge comprises, in combination: (i) means for producing, by Moire fringe effect, a countable output related to relative movement of two gauge elements, (ii) microprocessor circuitry receiving the countable output, said circuitry including counter means for counting the output, numeric modifying means for modifying the counted output, and memory means capable of storing and providing access to stored counts and inserted values and/or instructions, and
(iii) a visual display means driven by the microprocessor circuitry. The memory means may receive and provide access to, for example, maximum and/or minimum dimensions, and/or a previous reading or readings.
There may be instances in practical use of a gauge where it is not desired to read off any given dimension of a workpiece, but merely to know whether a gauge dimension falls within predetermined upper and lower limits, or is greater than a lower limit or is less than an upper limit. The micro-computer may be constructed to include means for the pre-setting of upper and/or lower limits, and to give rise to an appropriate visual indication as to a correct or incorrect dimension gauged.
It is also a known workshop system to have each of the gauged dimensions of a series of measurements allocated to one or another of a series of dimension ranges, without it being necessary to know the precise dimension gauged. The micro-computer may be constructed so that it is possible to insert a series of such dimension ranges so that when a series of workpieces are subsequently gauged, the instrument will give an indication of which range of dimensions that workpiece will fall within.
The microprocessor may be in the form of a micro-computer which may be associated with a custom chip containing, for example, a crystal frequency source and serving as a basic counter from which the remainder of the electronic circuitry operates. A pulsed light signal for a LED light source of the Moire fringe means may conveniently serve as a clock for the remainder of the system.
An embodiment of gauge in accordance with the invention is hereinafter particularly described by way of non-limiting example with reference to the figures of the accompanying drawings, wherein:-
Fig. 1 is a front elevation of the gauge; Fig. 2 is a side elevantion; Fig. 3 is a plan view;
Fig. 4 is a sectional elevation viewed on a first plane parallel to the front face of the gauge;
Fig. 5 is a sectional elevation viewed on a second plane normal to the front face of the gauge; Fig. 6 is a perspective elevation of two Moire fringe grating elements, seen in separated condition;
Fig. 7 is a front elevation of the assembled grating elements;
Fig. 8 is an edge elevation of the assembled grating elements;
Fig. 9 is a front elevation showing the grating assembly with light source LED's and photoreceptor transistors;
Fig. 10 is a schematic side elevation corresponding to Fig. 9;
Figs. 11a - 11d show the entire circuitry. The gauge comprises a housing 1 with a front cover 2 having a keyboard 3 and a display 4, advantageously a liquid crystal display. From the lower end of the housing there extends a gauge stem 5 carrying a spindle 6 terminating in an exchangeable anvil 7. On the rear face of the housing 1 is a backplate 8 having a hole 9 to receive a securing bolt or the like for stand mounting. On the upper end of the housing 1 there is communication outlet 10, such as a multiple connector, terminal block, jack point or the like. Also on the upper end there is provided an accessory mounting point 11, e.g. for the addition of dead- weights for use in gauging depression of resilient materials. Item 12 is a cover for a battery space.
The stem 5 is movable axially in an internal main frame of the housing 1 under the action of a coiled tension spring 13 which urges it towards its fully extended position. Axial end points of the movement of the stem 5 are determined by rubber buffers 14, 15.
If two diffraction gratings having suitable characteristics are moved in a particular manner one relative to the other, and if electromagnetic wave energy, e.g. light, is passed through the gratings transversely to their direction of relative movement, there is produced a pattern of "lines" alternating with "spaces" which also moves transversely to the direction of relative movement of the gratings and the movement of which bears a relationship to the extent of relative movement of the gratings. This is known as the "Moire fringe" effect.
On the stem 5 is mounted a member 16 which holds the movable elongated grating of a pair of gratings suitable for creating the Moire fringe effect. Secured on the housing is a pressure spring 17 serving to hold the two grating elements in rubbing contact, and a guidance spring 18 for the two grating elements.
A block 19 supports the stationary grating element or "index" 20, and photoreceptor transistors 21, and a further block 22 supports the pulsed light sources 23 (see Fig. 10). A printed circuit board 24 serves to connect the light sources 23 and photo-receptors 21 to main circuit boards 25 and 26 (see Fig. 5). Batteries 27 are housed in the battery space 28.
Referring to Fig. 5, the keyboard 3 comprises keys 29 for the operation of switch means 30 which are coupled through a printed circuit board 31 to the boards 25 and 26. The display 4 comprises a liquid crystal element carried by clips on supports 32 and covered by a fascia 33. Referring to Figs. 6 to 10, the elongated movable grating element 34 moves with the stem 5. The grating elements 20 and 34 are each made of glass with a diffraction grating formed thereon. The grating elements are provided with edge strips 35, 36 of chromium to act as rubbing contacting faces and serving also to retain the two gratings at a predetermined very small air-filled spacing from each other. Fig. 10 shows the pulsed LED light sources 23 which transmit their light through a transparent angled optical element 37 in which the direction of the rays of light is reversed through 180º so as to pass in the direction from the moving grating element 34 to the index grating element 20, and thence to the photoreceptor transistors 21.
The direction of movement of the lines and spaces of the Moire fringe effect is indicated by the arrow "A" in Fig. 9. The photoreceptor transistors are arranged in two pairs. A first pair (the right hand pair in Fig. 9) has its individual transistors spaced by a distance which is 180º of the cyclical spacing of the Moire fringe line/space pattern. Accordingly, the pair of transistors give a differential output signal which is greater, for a given light quantity, than would be obtained with a single transistor sensing the changes from light to dark. The second pair (the left hand pair in Fig. 9) is arranged, along the line of movement of the fringe effect pattern, at a spacing which is 90º out of phase with the first pair. This arrangement permits the micro-computer to determine the direction of relative movement of the grating element at any instant.
Referring now to Figs. 11a - 11d, a pulse generator 38 feeds the two LED light sources 23, 23 passing their light through the gratings 34, 20 to be received by the photoreceptor transistors 21,21 and 21,21. The output from the transistors passes to a conditioning circuit 39 which feeds information in the form of square waves to a custom chip 40 and processor 41.
Connectors are provided from the keyboard PCB 31 to the remainder of the components. Output from the chip and processor are led to the display.
A clock circuit 42 for the chip, and also possibly for the pulse generator 38 if required, is connected to the chip 40.
A first voltage regulator 43 provides a regulated nominal 3 volts to the processor 41, and a second voltage regulator 44 provides a regulated 5 volt supply. The communications link 10 (see Fig. 1) is connected into the remainder of the circuitry. At switch-on, the gauge will automatically revert to the mode of operation and display at the time of switch-off, including values of present tolerance +/-. If it is the first switch-on after battery insertion, this mode will be standard, and the display will directly indicate displacement, from zero position, with upward movement of the spindle regarded as "positive". The gauge is automatically re-zeroed at switch-on. The zero or 'datum point' of the gauge can be repositioned by resting the spindle on a datum plane and pressing the zero/reset key. The display will zero, if in 'standard mode', and max/min will both assume displayed value. The direction v/hich the gauge regards as
"positive" displacement can be changed by pressing the arrowed key. This also reverses the polarity of displacement from zero position, i.e. in "standard mode" it changes the polarity of the displayed figure. The arrow flag on the display reverses. However, pressing the arrowed key does not change the values stored in maximum/minimum, preset, or tolerance +/-.
The units can be changed from metric to imperial or vice versa by pressing the inch/mm key for change of unit of the display, and the appropriate unit flag (inch/mm) appears. All the values held in maximum/ minimum, tolerance +/- or preset memories, as well as the displayed value, are converted to the new unit.
The display may be changed from high to low resolution units and vice versa by pressing the resolution key for change of resolution into either imperial or metric units:
A diameter value may be displayed while reading a radius by pressing the diameter key. The displayed value is doubled and the diameter flag appears. Memory values of tolerance +/- preset, and maximum/minimum are not affected but are used for calculation of display value before it is doubled, i.e. tolerance +/- modes causes "hi", "1o" and "pass" flags to appear at the same positions of the spindle whether in "Diameter" or not.
A preset value may be set and a preset mode entered, providing a "set" flag is not displayed, by pressing the preset key to enter "set preset" mode. The "set" flag will appear on the display, along with "preset" flag flashing, and the value presently held in the preset memory is then displayed. This figure can then be adjusted with the inc/dec. and +/- keys to reach a desired value for preset. The figure is then set into the preset memory and the preset mode entered by re-pressing the preset key. The preset mode is shown by the "set" flag disappearing and the "preset" flag becoming steady. If a unit of measure is changed while setting, conversion of a set figure is not carried out. However, if a unit is changed while not in "set", preset, and tolerance +/-, the memory figure is converted.
A tolerance + value can be set, and a tolerance + mode entered by using a similar process to the last described above, except that once the tolerance + mode is entered, the display shows "hi" or "pass" depending on the position of the spindle and the tolerance + value set.
A tolerance - value may be set and a tolerance - rode entered using a similar process to that described in the preceding paragraph. A tolerance +/- or preset mode may be exited by selecting which mode is to be exited and pressing the appropriate key, i.e. Tol +/- or "preset". "Set" appears and the selected mode flag flashes as when setting. Upon pressing the "mode off" key, the "set" and selected mode flag disappear and operation of the device reverts to the modes left selected.
A maximum or minium value may be viewed from within any mode. Pressing the maximum or minimum key causes the "Max" flag or "min" flag to appear and the display to show the value of maximum or minimum excursion of the spindle since the maximum or minimum memory was last reset or the device zeroed.
A maximum or minimum viewing mode may be exited and, while viewing maximum, the previous display mode may be restored by re-pressing the "max" key. Alternatively, the "mode off" key may be pressed to achieve the same result, and similarly for minimum. When viewing maximum, minimum may be viewed by pressing the minimum key, and vice versa.
A maximum or minimum value may be reset, e.g. maximum may be reset to a current displayed value by pressing zero/reset whilst viewing the maximum value. This process clears any previous storage of a maximum value, and similarly for minimum value. It does not affect "zero" position.

Claims

1. A dimension gauge comprising, in combination, means for producing, by Moire fringe effect, a countable output related to relative movement of two gauge elements, microprocessor circuitry receiving the countable output, said circuitry including counter means for counting the output, numeric modifying means for modifying the counted output, and memory means capable of storing and providing access to stored counts and inserted values and/or instructions, and a visual display means driven by the microprocessor circuitry.
2. A dimension gauge, as claimed in claim 1, wherein the microprocessor circuitry includes means for the presetting of upper and/or lower limits of dimension.
3. A dimension gauge, as claimed in claim 1 or claim 2, wherein the microprocessor circuitry is arranged to permit insertion of a series of dimension ranges such that, when an item is gauged, the gauge provides an indication of which range of dimensions appertains to that item.
4. A dimension gauge substantially as described herein with reference to the accompanying drawings.
EP81902638A 1980-09-22 1981-09-21 Dimension gauge having memory facilities Withdrawn EP0060287A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8030566 1980-09-22
GB8030566 1980-09-22

Publications (1)

Publication Number Publication Date
EP0060287A1 true EP0060287A1 (en) 1982-09-22

Family

ID=10516213

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81902638A Withdrawn EP0060287A1 (en) 1980-09-22 1981-09-21 Dimension gauge having memory facilities

Country Status (5)

Country Link
EP (1) EP0060287A1 (en)
BE (1) BE890430A (en)
GB (1) GB2094475A (en)
IT (1) IT1171543B (en)
WO (1) WO1982001064A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5975111A (en) * 1982-10-22 1984-04-27 Ichiro Katayama Display device of dial gauge
US4736313A (en) * 1984-02-24 1988-04-05 Mitutoyo Mfg. Co., Ltd. Digital indication type length measuring system
CH677144A5 (en) * 1988-12-21 1991-04-15 Weber Hans R
US5440819A (en) * 1994-04-19 1995-08-15 Comtorgage Corporation Actuator and programmable amplifier for an expanding plug gage head
DE102004041119A1 (en) * 2004-08-24 2006-03-30 Kroeplin Gmbh Electronic display for measurement instruments, has analog and digital displays with programmable controller suiting it for very wide range of applications

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4181959A (en) * 1976-11-30 1980-01-01 Sharp Kabushiki Kaisha Stored information transferable means for a combined electronic digital scale and calculator
US4114280A (en) * 1977-04-27 1978-09-19 Quality Measurement Systems, Inc. Digital electronic indicator
DE2720869C2 (en) * 1977-05-10 1979-02-08 Team-Technik Gesellschaft Fuer Entwicklung Und Vertrieb Von Maschinen Und Anglagen Mbh, 7141 Freiberg Device for direct and / or evaluated detection and display of a measuring section by means of a scale with slide

Non-Patent Citations (1)

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Title
See references of WO8201064A1 *

Also Published As

Publication number Publication date
IT1171543B (en) 1987-06-10
IT8149334A0 (en) 1981-09-21
BE890430A (en) 1982-03-22
WO1982001064A1 (en) 1982-04-01
GB2094475A (en) 1982-09-15

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Inventor name: ROBSON, EDGAR FLETCHER

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Inventor name: SWEET, NIGEL ROBERT

Inventor name: GERALD, NORMAN