G - Physics – 01 – L
Patent
G - Physics
01
L
356/200, 73/69
G01L 3/10 (2006.01)
Patent
CA 1304601
Abstract of the Disclosure A magnetoelastic torque transducer for providing an electrical signal indicative of the torque applied to a member, the member including ferromagnetic, magnetostrictive means affixed to, associated with or forming a part of the surface of the torqued member for altering in magnetic permeability in response to the application of torque to the member. The ferromagnetic, magnetostrictive means is advantageously formed of a thermally hardened or iron-nickel martensite hardenable steel alloy characterized by a substantially isotropic magnetostriction having an absolute value of at least 5 ppm and including from 0.05 to 0.75 percent by-weight carbon and sufficient of one or more elements selected from Ni, Cr, Co, Ti, Al, Mn, Mo, Cu and B to raise the alloy magnetostriction to at least 5 ppm absolute. Preferably, the ferromagnetic, magnetostrictive means is formed of nickel maraging steel. me transducer comprises a pair of axially spaced-apart annular bands defined withln a region of the ferromagnetic, magnetostrictive means, the bands being endowed with residual stress created, respectively symmetrical right and left hand helically directed magnetic anisotropy of sufficiently large magnitude that the contribution to total magnetic anisotropy of any random anisotropy in the member is negligible. In one aspect of the invention, each said band has at least one circumferential region which is free of residually unstressed areas over at least 50% of its circumferential length. In another aspect of the invention, the alloy is thermally hardened before the bands are endowed with the residual stress-created magnetic anisotropy.
553032
Mag Dev Inc.
Mcfadden Fincham
LandOfFree
Magnetoelastic torque transducer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetoelastic torque transducer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetoelastic torque transducer will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1262343