GB836116A - Improvements in and relating to electro-magnetic systems for measuring or indicatingclearances between relatively movable parts - Google Patents

Improvements in and relating to electro-magnetic systems for measuring or indicatingclearances between relatively movable parts

Info

Publication number
GB836116A
GB836116A GB2851555A GB2851555A GB836116A GB 836116 A GB836116 A GB 836116A GB 2851555 A GB2851555 A GB 2851555A GB 2851555 A GB2851555 A GB 2851555A GB 836116 A GB836116 A GB 836116A
Authority
GB
United Kingdom
Prior art keywords
coil
projections
relatively movable
indicatingclearances
electro
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
GB2851555A
Inventor
Eliot Patrick Fowler
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Priority to GB2851555A priority Critical patent/GB836116A/en
Publication of GB836116A publication Critical patent/GB836116A/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
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • G01B7/023—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring distance between sensor and object

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

836,116. Electric tests &c. BRITISH THOMSON-HOUSTON CO. Ltd. Jan. 4, 1957 [Oct. 6, 1955], No. 28515/57. Class 37. To detect clearance between relatively movable members such as turbine blading and casing a member carrying projections is mounted on one member and a pick-up coil 7 excited by a permanent magnet 6 on the other. As the projections pass the coil the reluctance of the magnetic circuit is reduced and a voltage induced in the coil whose amplitude is dependent on the spacing d. The indications of a meter 11 are made independent of speed by integrating the coil output with respect to time and the meter has a logarithmic scale. In a modification projections 2 are replaced by conical recesses formed by the end of a drill. Radial or axial clearance may be measured and the device may be used at the low-pressure end of a turbine with the capacitive device described in Specification 756,466, at the high-pressure end.
GB2851555A 1955-10-06 1955-10-06 Improvements in and relating to electro-magnetic systems for measuring or indicatingclearances between relatively movable parts Expired GB836116A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2851555A GB836116A (en) 1955-10-06 1955-10-06 Improvements in and relating to electro-magnetic systems for measuring or indicatingclearances between relatively movable parts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2851555A GB836116A (en) 1955-10-06 1955-10-06 Improvements in and relating to electro-magnetic systems for measuring or indicatingclearances between relatively movable parts

Publications (1)

Publication Number Publication Date
GB836116A true GB836116A (en) 1960-06-01

Family

ID=10276860

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2851555A Expired GB836116A (en) 1955-10-06 1955-10-06 Improvements in and relating to electro-magnetic systems for measuring or indicatingclearances between relatively movable parts

Country Status (1)

Country Link
GB (1) GB836116A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3997835A (en) * 1973-11-14 1976-12-14 Nippon Kokan Kabushiki Kaisha Method and apparatus for measuring distance
US4107603A (en) * 1976-11-26 1978-08-15 Texaco Inc. Electromagnetic means and method for detecting propeller shaft bearing wear
US4604251A (en) * 1985-06-14 1986-08-05 Kuhman Jeffrey A Method and apparatus for indicating dimensional relationships in plastic material feeding device during operation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3997835A (en) * 1973-11-14 1976-12-14 Nippon Kokan Kabushiki Kaisha Method and apparatus for measuring distance
US4107603A (en) * 1976-11-26 1978-08-15 Texaco Inc. Electromagnetic means and method for detecting propeller shaft bearing wear
US4604251A (en) * 1985-06-14 1986-08-05 Kuhman Jeffrey A Method and apparatus for indicating dimensional relationships in plastic material feeding device during operation

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