GB811669A - Improvements relating to displacement measuring devices - Google Patents

Improvements relating to displacement measuring devices

Info

Publication number
GB811669A
GB811669A GB22185/56A GB2218556A GB811669A GB 811669 A GB811669 A GB 811669A GB 22185/56 A GB22185/56 A GB 22185/56A GB 2218556 A GB2218556 A GB 2218556A GB 811669 A GB811669 A GB 811669A
Authority
GB
United Kingdom
Prior art keywords
conductors
cursor
limbs
displacement
conductor
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
GB22185/56A
Inventor
Rolf Edmund Spencer
Roger Voles
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries 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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB22185/56A priority Critical patent/GB811669A/en
Publication of GB811669A publication Critical patent/GB811669A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01D5/204—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 mutual induction between two or more coils
    • G01D5/2086—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 mutual induction between two or more coils by movement of two or more coils with respect to two or more other coils
    • 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
    • G01D5/22—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 differentially influencing two coils
    • G01D5/2291—Linear or rotary variable differential transformers (LVDTs/RVDTs) having a single primary coil and two secondary coils

Abstract

811,669. Displacement measuring. ELECTRIC & MUSICAL INDUSTRIES Ltd. July 10, 1957 [July 18, 1956], No. 22185/56. Class 40 (1). A displacement measuring device, which may be used for example to measure the relative displacement between the base of a machine tool and a slide mounted thereon, comprises a scale having a zig-zag conductor and a cursor having at least one conductor of similar configuration and adapted to be mounted in proximity to the scale so that relative displacement can occur between the scale and the cursor in a predetermined direction, the limbs of the conductors being oblique to this direction. The device is such that electrical signals can be transferred by electromagnetic induction from one conductor to the other with an amplitude ratio responsive to the relative displacement. As shown, the scale comprises a glass plate 2 having a conductor 1 applied thereto by a silver etching process. The cursor 3 carries two relatively short conductors 5, 6, corresponding limbs of the two conductors being displaced relatively to each other by (2n+¢)p where n is an integer and p is the spacing of the limbs of conductor 1. Further conductors la, 5a, 6a may be provided as shown to cancel out any error due to relative sidelash between the scale and the cursor. Alternatively a sidelash detecting device similar to that shown but wherein the limbs of the conductors are parallel to the predetermined direction 4 may be used to drive a servomotor which displaces the cursor 3 to annul the sidelash or removes the effects by means of differentials after the output voltages of the displacement measuring device have been followed up. The conductors of the device illustrated may be printed alongside another measuring device having the conducting limbs normal to the relative movement for indicating fine displacement and several devices of various " gear-down " ratios may be employed, printed on the same plate and cursor. In a modification conductors 1, 5, 6 may be printed on discs or cylinders with successive limbs angularly displaced about the axis to measure angular displacement.
GB22185/56A 1956-07-18 1956-07-18 Improvements relating to displacement measuring devices Expired GB811669A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB22185/56A GB811669A (en) 1956-07-18 1956-07-18 Improvements relating to displacement measuring devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB22185/56A GB811669A (en) 1956-07-18 1956-07-18 Improvements relating to displacement measuring devices

Publications (1)

Publication Number Publication Date
GB811669A true GB811669A (en) 1959-04-08

Family

ID=10175328

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22185/56A Expired GB811669A (en) 1956-07-18 1956-07-18 Improvements relating to displacement measuring devices

Country Status (1)

Country Link
GB (1) GB811669A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1282987B (en) * 1964-10-12 1968-11-14 Philips Patentverwaltung Arrangement for the contactless measurement of relative displacements of rotating bodies
DE1290345B (en) * 1967-02-08 1969-03-06 Continental Elektronidustrie A Transmitter for angular position measurement
DE1298299B (en) * 1960-05-18 1969-06-26 Inductosyn Corp Inductive transmitter
DE1423823B1 (en) * 1961-02-21 1971-06-03 Telecomputing Corp CAPACITIVE TRANSMITTER
US4273448A (en) * 1979-06-04 1981-06-16 Schiler Frederick S Measuring method and apparatus
FR2482283A1 (en) * 1980-05-07 1981-11-13 Tovarne Strojarskej Tech REGULATOR FOR AN INDUCTIVE LINEAR MEASURING DEVICE
US4737709A (en) * 1985-10-02 1988-04-12 Rolls-Royce Plc Apparatus for measuring axial movement of a rotating member

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1298299B (en) * 1960-05-18 1969-06-26 Inductosyn Corp Inductive transmitter
DE1423823B1 (en) * 1961-02-21 1971-06-03 Telecomputing Corp CAPACITIVE TRANSMITTER
DE1282987B (en) * 1964-10-12 1968-11-14 Philips Patentverwaltung Arrangement for the contactless measurement of relative displacements of rotating bodies
DE1290345B (en) * 1967-02-08 1969-03-06 Continental Elektronidustrie A Transmitter for angular position measurement
US4273448A (en) * 1979-06-04 1981-06-16 Schiler Frederick S Measuring method and apparatus
FR2482283A1 (en) * 1980-05-07 1981-11-13 Tovarne Strojarskej Tech REGULATOR FOR AN INDUCTIVE LINEAR MEASURING DEVICE
US4737709A (en) * 1985-10-02 1988-04-12 Rolls-Royce Plc Apparatus for measuring axial movement of a rotating member

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