GB791902A - Improvements in means for measuring lengths with great accuracy - Google Patents

Improvements in means for measuring lengths with great accuracy

Info

Publication number
GB791902A
GB791902A GB2618154A GB2618154A GB791902A GB 791902 A GB791902 A GB 791902A GB 2618154 A GB2618154 A GB 2618154A GB 2618154 A GB2618154 A GB 2618154A GB 791902 A GB791902 A GB 791902A
Authority
GB
United Kingdom
Prior art keywords
graduations
magnetic
scale
head
series
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
GB2618154A
Inventor
Johannes Heidenhain
Irmfried Kirstaedter
Horst Burkhardt
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.)
Dr Johannes Heidenhain GmbH
Original Assignee
Dr Johannes Heidenhain GmbH
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
Priority to DD10407D priority Critical patent/DD10407A/xx
Priority to IT524818D priority patent/IT524818A/it
Priority to FR1096925D priority patent/FR1096925A/en
Priority to US447856A priority patent/US2914756A/en
Application filed by Dr Johannes Heidenhain GmbH filed Critical Dr Johannes Heidenhain GmbH
Priority to GB2618154A priority patent/GB791902A/en
Publication of GB791902A publication Critical patent/GB791902A/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
    • G01D5/2006—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 self-induction of one or more coils
    • G01D5/2013—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 self-induction of one or more coils by a movable ferromagnetic element, e.g. a core
    • 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
    • G01B3/002—Details
    • G01B3/004—Scales; Graduations

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

791,902. Linear dimension gauges. HEIDENHAIN, J., [trading as WENCZLER & HEIDENHAIN]. Sept. 9, 1954, No. 26181/54. Class 106 (2). [Also in Group XXII] A measuring means for determining the position of a body in relation to a graduated scale is characterized by graduations formed by variations in magnetic field along the scale and a scanning member movable relative to the scale and transmitting signals in response to the magnetic conditions prevailing in a particular position along the scale, the scanning member being attached to the body. In some embodiments, a magnetic head 3 scans a scale 1 having magnetic markings corresponding to the graduations (Fig. 1). The markings may be inserts of magnetic in non-magnetic material or vice versa. Two series of graduations may be arranged in vernier relation. The graduations may be arranged to vary in their magnetic effect so that the signals produced differ according to the position of the body. A magnetic tape may be used to enable vocal announcements of the body's position to be made. A further alternative consists in using electrical impulse counters to determine the position. The graduations may be directionally arranged for scanning by a series of magnetic heads having gaps positioned to respond to particular graduations (Fig. 5). The effective scale length may be increased by arranging it as a helix on a rotating cylinder, the magnetic head traversing the cylinder longitudinally. If the speed of the traverse of the head relative to the graduations is not high enough to produce the necessary variations of potential, the head may be oscillated or comprise an oscillating portion. Alternatively it may carry a coil through which an alternating current is passed. The scanning means may comprise deflector magnets traversing the graduations and so positioning the beam, or beams of a cathode-ray tube on one or more of its output electrodes as to produce a selective signal (Figs. 11, 13). A series of gaps in one or more deflector magnets may respond to variously arranged graduations (e.g. Fig. 20). Specification 607,702, [Group XXII], is referred to.
GB2618154A 1953-01-21 1954-09-09 Improvements in means for measuring lengths with great accuracy Expired GB791902A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DD10407D DD10407A (en) 1953-01-21
IT524818D IT524818A (en) 1953-01-21
FR1096925D FR1096925A (en) 1953-01-21 1954-01-20 Device for determining movements made along a series of reference marks
US447856A US2914756A (en) 1953-01-21 1954-01-21 Measuring apparatus comprising a graduated scale
GB2618154A GB791902A (en) 1954-09-09 1954-09-09 Improvements in means for measuring lengths with great accuracy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2618154A GB791902A (en) 1954-09-09 1954-09-09 Improvements in means for measuring lengths with great accuracy

Publications (1)

Publication Number Publication Date
GB791902A true GB791902A (en) 1958-03-12

Family

ID=10239606

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2618154A Expired GB791902A (en) 1953-01-21 1954-09-09 Improvements in means for measuring lengths with great accuracy

Country Status (1)

Country Link
GB (1) GB791902A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3153111A (en) * 1958-06-26 1964-10-13 Nat Res Dev Measurement of displacements
US3276131A (en) * 1965-04-09 1966-10-04 Clayton W Hahn Linear measuring device
US4484391A (en) * 1981-10-15 1984-11-27 Sony Magnescale Inc. Magnetic scaling device
US4523381A (en) * 1981-09-28 1985-06-18 Sony Magnescale Incorporation Scaling device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3153111A (en) * 1958-06-26 1964-10-13 Nat Res Dev Measurement of displacements
US3276131A (en) * 1965-04-09 1966-10-04 Clayton W Hahn Linear measuring device
US4523381A (en) * 1981-09-28 1985-06-18 Sony Magnescale Incorporation Scaling device
US4484391A (en) * 1981-10-15 1984-11-27 Sony Magnescale Inc. Magnetic scaling device

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