GB508507A - Improvements in or relating to tachometers - Google Patents

Improvements in or relating to tachometers

Info

Publication number
GB508507A
GB508507A GB36278/37A GB3627837A GB508507A GB 508507 A GB508507 A GB 508507A GB 36278/37 A GB36278/37 A GB 36278/37A GB 3627837 A GB3627837 A GB 3627837A GB 508507 A GB508507 A GB 508507A
Authority
GB
United Kingdom
Prior art keywords
magnet
changes
temperature
tachometers
relating
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
GB36278/37A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB508507A publication Critical patent/GB508507A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/49—Devices characterised by the use of electric or magnetic means for measuring angular speed using eddy currents
    • G01P3/495—Devices characterised by the use of electric or magnetic means for measuring angular speed using eddy currents where the indicating means responds to forces produced by the eddy currents and the generating magnetic field

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)

Abstract

508,507. Speedometers. KOLLSMAN, P. Dec. 31, 1937, No. 36278. Convention date, March 22. [A Specification was laid open to inspection under Sect. 91 of the Acts, July 29, 1938.] [Class 106 (iii)] In a speed indicator having a permanent magnet 20M mounted on a shaft 201, and a coaxial metallic member 242 which tends to follow the rotating magnet in view of the eddy currents set up thereby, a plane disc 250 of magnetic material having its permeability decreasing with increase in temperature is utilized to shunt partially the magnet 20M. Changes of conductivity of the member 242 due to changes of temperature will then be compensated by changes in magnetic field. A soft iron armature 249 is mounted on the member 248 carrying the magnet 20M and surrounds the member 242.
GB36278/37A 1937-03-22 1937-12-31 Improvements in or relating to tachometers Expired GB508507A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US508507XA 1937-03-22 1937-03-22

Publications (1)

Publication Number Publication Date
GB508507A true GB508507A (en) 1939-06-30

Family

ID=21967867

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36278/37A Expired GB508507A (en) 1937-03-22 1937-12-31 Improvements in or relating to tachometers

Country Status (1)

Country Link
GB (1) GB508507A (en)

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