GB413837A - Improvements relating to speed indicators - Google Patents

Improvements relating to speed indicators

Info

Publication number
GB413837A
GB413837A GB1255333A GB1255333A GB413837A GB 413837 A GB413837 A GB 413837A GB 1255333 A GB1255333 A GB 1255333A GB 1255333 A GB1255333 A GB 1255333A GB 413837 A GB413837 A GB 413837A
Authority
GB
United Kingdom
Prior art keywords
stator
shunts
copper
speedometers
poles
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
GB1255333A
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
Priority to GB1255333A priority Critical patent/GB413837A/en
Publication of GB413837A publication Critical patent/GB413837A/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
    • G01P1/00—Details of instruments
    • G01P1/04—Special adaptations of driving means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

413,837. Speedometers. WATSON, E. A., Zinal, Stoneleigh Road, Gibbet Hill, Coventry. April 29, 1933, No. 12553. [Class 106 (iii).] Temperature-compensating means is provided in electric eddy-current speedometers in which a generator driven at a rate equal to or proportional to the speed to be indicated, supplies alternating or polyphase current to windings b on a stator having pole pieces a between which a disc d or copper or aluminium, mounted on a spindle carrying a pointer g, can be rotated by the field of the stator against the pull of the spring f. The poles a are associated with magnetic shunts e of a nickel-copper alloy, the magnetic susceptibility of which diminishes with increase of temperature. One of the poles a is divided and provided with a copper shroud c. A higher degree of accuracy may be obtained by providing on the shunts e a small heating winding i associated with the stator windings. Alternatively a wound iron extension from the stator may be arranged alongside the shunts.
GB1255333A 1933-04-29 1933-04-29 Improvements relating to speed indicators Expired GB413837A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1255333A GB413837A (en) 1933-04-29 1933-04-29 Improvements relating to speed indicators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1255333A GB413837A (en) 1933-04-29 1933-04-29 Improvements relating to speed indicators

Publications (1)

Publication Number Publication Date
GB413837A true GB413837A (en) 1934-07-26

Family

ID=10006744

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1255333A Expired GB413837A (en) 1933-04-29 1933-04-29 Improvements relating to speed indicators

Country Status (1)

Country Link
GB (1) GB413837A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1231039B (en) * 1959-12-08 1966-12-22 Noris Tachometerwerk G M B H Speed measuring device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1231039B (en) * 1959-12-08 1966-12-22 Noris Tachometerwerk G M B H Speed measuring device

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