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Expired Canadian patentCanada

Magnetoelastic shape meter

CA 1065644 A · Owner: Asea Aktiebolag · Inventors: Dahle, Orvar

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

In order to measure deformations of magnetic material which is being cold-rolled a plurality of magnetoelastic stress-sensing transducers are used, each of which has two U-shaped magnetic cores provided with windings and crossing each other perpendicularly. The cores are mounted with their pole surfaces spaced from the strip being rolled and with the cores making an angle of 45 % with the longitudinal direction of the strip. The individual transducers are screened from each other bt a screen of magnetic material positioned axially symmetrically around each transducer so as to prevent, adjacent transducers from magnetically affecting each other except through the field in the measuring …

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted November 6, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 6, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedNovember 6, 1979
Term endedNovember 6, 1996
Patent numberCA 1065644 A
Classification (IPC)G01B7/04 +2 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedNov 6, 1979Term endedNov 6, 1996

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.