GB867542A - Improvements in micrometer screw measuring means - Google Patents

Improvements in micrometer screw measuring means

Info

Publication number
GB867542A
GB867542A GB742357A GB742357A GB867542A GB 867542 A GB867542 A GB 867542A GB 742357 A GB742357 A GB 742357A GB 742357 A GB742357 A GB 742357A GB 867542 A GB867542 A GB 867542A
Authority
GB
United Kingdom
Prior art keywords
coil
micrometer
wheel
reluctance
march
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
GB742357A
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.)
AEI John Thompson Nuclear Energy Co Ltd
Original Assignee
AEI John Thompson Nuclear Energy 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 AEI John Thompson Nuclear Energy Co Ltd filed Critical AEI John Thompson Nuclear Energy Co Ltd
Priority to GB742357A priority Critical patent/GB867542A/en
Publication of GB867542A publication Critical patent/GB867542A/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
    • G01B3/00—Measuring instruments characterised by the use of mechanical techniques
    • G01B3/18—Micrometers
    • 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
    • G01B7/001—Constructional details of gauge heads

Landscapes

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

Abstract

867,542. Linear-dimension gauges; vernier equivalents. A.E.I. - JOHN THOMPSON NUCLEAR ENERGY CO. Ltd., SHEPHERD, G. H., and STAIT, D. P. March 6, 1958 [March 6, 1957], No. 7423/57. Class 106 (2). [Also in Group XXXV] A micrometer screw gauge incorporates a magnetic circuit, the reluctance of which changes as part of the micrometer is rotated, together with means for counting the changes in reluctance. The spindle 1 of the micrometer carries a toothed wheel 4 and an annular element 6 embraced by a coil 7. An element 8 carrying fingers 10 is separated from the element 6 by an air gap 5 in which the teeth of wheel 4 rotate. An alternating current of some 4000 cycles/sec. is applied to the coil 7 and causes a flux to circulate in the magnetic circuit 6, 8, 10. If one of the teeth of wheel 4 is coincident with a finger 10, a maximum flux will occur in that finger and will induce a voltage in a coil 13 mounted thereon. The number of pulses is counted by a known counter and a vernier indication is given by the relative magnitude of the voltages induced in the other coils 13.
GB742357A 1957-03-06 1957-03-06 Improvements in micrometer screw measuring means Expired GB867542A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB742357A GB867542A (en) 1957-03-06 1957-03-06 Improvements in micrometer screw measuring means

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB742357A GB867542A (en) 1957-03-06 1957-03-06 Improvements in micrometer screw measuring means

Publications (1)

Publication Number Publication Date
GB867542A true GB867542A (en) 1961-05-10

Family

ID=9832840

Family Applications (1)

Application Number Title Priority Date Filing Date
GB742357A Expired GB867542A (en) 1957-03-06 1957-03-06 Improvements in micrometer screw measuring means

Country Status (1)

Country Link
GB (1) GB867542A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2413997A1 (en) * 1973-03-22 1974-09-26 Inoue Japax Res MEASURING INSTRUMENT
CN107726941A (en) * 2017-11-09 2018-02-23 江西凯润达精密仪器有限公司 Magnetic waterproof screw micrometer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2413997A1 (en) * 1973-03-22 1974-09-26 Inoue Japax Res MEASURING INSTRUMENT
CN107726941A (en) * 2017-11-09 2018-02-23 江西凯润达精密仪器有限公司 Magnetic waterproof screw micrometer

Similar Documents

Publication Publication Date Title
Conversi et al. On the decay process of positive and negative mesons
GB915659A (en) Improvements in or relating to apparatus for indicating torsion in a shaft
GB867542A (en) Improvements in micrometer screw measuring means
US3258687A (en) Wide range linear fluxgate magnetometer
GB781363A (en) Frequency-measuring device
GB855637A (en) Electromechanical transducer
GB897513A (en) Improvements in or relating to tachometer generators and frequency sensitive a.c. systems
SU121247A1 (en) Device for measuring skin area
US3398367A (en) Register device wherein indicator is restrained against undesirable movement
GB867580A (en) Improvements in extensometer measuring means
FR83451E (en) Improvement in methods of measuring magnetic fields by nuclear resonance
US1206294A (en) Maximum-demand meter.
US1303243A (en) Ampere-hour meter
SU131640A1 (en) Inductive sensor for axial movements of rotating diamagnetic shafts
FR2064761A5 (en) Micrometer for use in severe operating conditions
GB800655A (en) Improvements in or relating to multi-range electrical meters
US1989606A (en) Electric meter
SU108631A2 (en) Inductive linear displacement sensor
SU129970A1 (en) Displacement meter with inductive solenoidal sensor of transformer type
GB833712A (en) Improvements in or relating to systems for detecting relative movements using ferro-resonant systems
SU132831A1 (en) Rotary Transformer
JH A mass spectrometer mass marker
GB566227A (en) Improvements in electromagnetic gauges
GB1108084A (en) Measurement of thickness and/or electrical resistivity of conductive sheet
GB1374069A (en) Magnetic flux-current signal converting apparatus