GB626947A - Electronic apparatus for measuring the variation or movement of a magnetic field and particularly for measuring the relative position of two objects - Google Patents

Electronic apparatus for measuring the variation or movement of a magnetic field and particularly for measuring the relative position of two objects

Info

Publication number
GB626947A
GB626947A GB14647/46A GB1464746A GB626947A GB 626947 A GB626947 A GB 626947A GB 14647/46 A GB14647/46 A GB 14647/46A GB 1464746 A GB1464746 A GB 1464746A GB 626947 A GB626947 A GB 626947A
Authority
GB
United Kingdom
Prior art keywords
measuring
objects
magnetic field
cathode
anodes
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
GB14647/46A
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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 Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of GB626947A publication Critical patent/GB626947A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G7/00—Weighing apparatus wherein the balancing is effected by magnetic, electromagnetic, or electrostatic action, or by means not provided for in the preceding groups
    • 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
    • G01D5/18—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 effective impedance of discharge tubes or semiconductor devices

Landscapes

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

Abstract

626,947. Magnetic tests and measurements. EASTMAN KODAK CO. May 15, 1946, No. 14647. Convention date, May 15, 1945. [Class 37] [Also in Group XL (a)] , An apparatus for detecting and measuring the variation or movement of a magnetic field such as may be produced by a coil 31, comprises an electronic tube 32 having a cathode 34 and two anodes 36, 37 so disposed that the ratio of the anode currents is proportional to the magnetic field strength effective upon the electron stream from the cathode 34 and having at least two electrodes 35 at substantially the same potential as the cathode arranged at the sides of the electron stream for compressing the latter and means connected to the anodes for measuring the relative currents therethrough. A suppressor electrode 38 at substantially the same potential as the cathode 34 may be provided between the two anodes for increasing the sensitivity of the apparatus. The apparatus may be used for measuring the relative position of two objects or the electronic tube may be used to control a relay switch or motor for adjusting the position of two objects to some predetermined arrangement.
GB14647/46A 1945-05-15 1946-05-15 Electronic apparatus for measuring the variation or movement of a magnetic field and particularly for measuring the relative position of two objects Expired GB626947A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US626947XA 1945-05-15 1945-05-15

Publications (1)

Publication Number Publication Date
GB626947A true GB626947A (en) 1949-07-25

Family

ID=22044195

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14647/46A Expired GB626947A (en) 1945-05-15 1946-05-15 Electronic apparatus for measuring the variation or movement of a magnetic field and particularly for measuring the relative position of two objects

Country Status (1)

Country Link
GB (1) GB626947A (en)

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